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Report 027/17

EPDM – Empresa de Perfuração e Desenvolvimento Mineiro, S.A. Página 1 de 342

Laboratório Mineralógico

EPDM – Empresa de Perfuração e Desenvolvimento Mineiro, S.A.

Algares, Apartado 25, 7600-015 Aljustrel, Portugal

Tel. +351 284 249 400 Fax +351 284 249 492 E-mail [email protected]

Customer Redcorp, Lda

Customer address: Rua José Eigenmann, Nº 90 4715-199 Braga, Portugal

Anexx to the test report nº 027/17 (Automated mineralogy by MLA).

Samples identification

Code

ST_01/200

ST_01/211

ST_02/329

ST_04/385

MS_01/159

MS_01/169

MS_01/227

MS_01/238

MS_02/171

MS_02/208

MS_02/219

MS_03/177

MS_03/179

MS_03/231

MS_03/249

mailto:[email protected]

Report 027/17


Table of contents

EXECUTIVE SUMMARY ............................................................................................................................................. 3

TERMINOLOGY ....................................................................................................................................................... 14

FISSURAL REMOBILIZATIONS ................................................................................................................................. 16

Sample ST_01/200 ............................................................................................................................................. 16

Sample ST_01/211 ............................................................................................................................................. 40

Sample ST_02/329 ............................................................................................................................................. 64

Sample ST_04/385 ............................................................................................................................................. 88

GOSSAN ............................................................................................................................................................... 110

Sample MS_01/159 ......................................................................................................................................... 110

MASSIVE SULFIDES .............................................................................................................................................. 126

Sample MS_01/169 ......................................................................................................................................... 126

Sample MS_01/227 ......................................................................................................................................... 149

Sample MS_01/238 ......................................................................................................................................... 171

Sample MS_02/171 ......................................................................................................................................... 193

Sample MS_02/208 ......................................................................................................................................... 215

Sample MS_02/219 ......................................................................................................................................... 237

Sample MS_03/177 ......................................................................................................................................... 259

Sample MS_03/179 ......................................................................................................................................... 281

STRINGER ............................................................................................................................................................. 303

Sample MS_03/231 ......................................................................................................................................... 303

Sample MS_03/249 ......................................................................................................................................... 323

Report 027/17


EXECUTIVE SUMMARY

Modal Mineralogy

Table 1 – Modal mineralogy of all the samples.

Mineral ST_01_

200 ST_01_

211 ST_02_

329 ST_04_

385 MS_01_

159 MS_01_

169 MS_01_

227 MS_01_

238 MS_02_

171 MS_02_

208 MS_02_

219 MS_03_

177 MS_03_

179 MS_03_

231 MS_03_

249

Sphalerite 10,10 19,67 16,55 5,98 3,99 5,83 22,65 3,61 20,12 8,53 3,89 3,06 2,11 4,59

Chalcopyrite 2,20 1,27 15,33 5,35 <0,01 0,16 0,20 0,14 0,20 0,13 0,15 0,04 0,03 7,80 2,73

Galena 4,85 3,09 12,07 4,95 0,15 2,96 9,83 11,29 4,26 17,18 4,18 5,14 3,88 0,24 0,01

Pyrite 26,03 4,11 4,93 5,67 0,68 78,62 78,53 63,00 84,46 54,45 81,44 87,60 86,32 25,13 9,09

Tetrahedrite 0,08 <0,01 0,02 0,01 0,06 0,11 0,02 0,03 0,07 0,07 0,02 0,11 <0,01

Enargite 0,01 <0,01 0,01 0,08 0,06 0,08 0,01 0,03 <0,01 <0,01 0,15 1,27

Arsenopyrite 10,92 1,82 0,07 5,44 6,45 2,68 1,10 3,71 0,33 0,01

Chalcocite 1,22 0,93 0,11 <0,01 0,02 0,04 <0,01 0,01 0,50 1,22

Kesterite 0,03 0,01 0,01 0,01 0,01 <0,01 <0,01 0,02 0,02 0,01 <0,01

Clausthalite <0,01 <0,01 <0,01 0,03

Tiemannite 0,10

Acanthite

Naumannite

Amalgam <0,01

Luanheite 0,02

Quartz 4,53 2,97 17,57 29,73 37,79 2,12 0,60 1,01 0,57 0,31 0,64 0,69 1,16 1,70 14,14

Smithsonite 23,43 3,22 3,21 2,32 5,95 0,01 0,01 0,03 0,02 0,07 0,01 <0,01 0,04 0,49 0,60

Dolomite 0,15 0,38 2,84 19,96 <0,01 0,01 0,06 0,01 0,01 0,02 0,01 0,02 0,06 0,08 0,07

Chlorites 25,47 60,95 21,75 22,73 12,82 0,21 0,22 0,37 0,40 0,44 0,71 0,22 0,40 59,79 62,74

Phyllosilicates 0,83 1,42 4,65 1,48 0,85 0,22 0,35 0,47 0,44 0,24 0,77 0,37 0,56 0,25 2,62

Other silicates 0,43 0,94 0,51 0,92 0,47 0,14 2,05 0,23 0,24 0,14 0,48 0,53 0,35 0,22 0,34

Titanite <0,01 <0,01 <0,01 0,01 0,01 0,01 0,01 <0,01 <0,01 0,01 0,01 0,01 <0,01

Rutile 0,22 0,63 0,15 0,38 0,06 0,09 0,01 <0,01 <0,01 0,93 0,31

Cassiterite 0,01 <0,01 0,03 2,25 0,31 0,14 0,25 0,13 0,27 0,22 0,14 0,16 0,04 0,05

Goethite 0,03 0,06 0,04 0,05 37,26 <0,01 0,01 0,26 0,01 0,01 0,02 <0,01 0,09 0,08 0,13

Phosphates 0,25 0,31 0,10 0,07 0,01 0,03 0,01 <0,01 <0,01 <0,01 <0,01 0,01

Vanadinite 0,06 0,26

Schultenite 0,07 1,22

Sulphur

Alunite + clay 0,03 0,03 0,05 0,07 <0,01 <0,01 <0,01 <0,01 0,01 0,01 0,01 <0,01 <0,01 0,01 0,03

Others 0,08 0,10 0,19 0,07 0,16 0,23 0,02 0,05 0,08 0,04 0,13 0,13 0,01 0,03

TOTAL 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00

Report 027/17


Fissural remobilizations Stringer Gossan

Massive sulfides

Figure 1 – Modal mineralogy for the different ‘lithologies’.

As we can see in the figure 1, the different lithologies present contrasting mineralogical associations.

The pyrite is the more abundant mineral in the Massive sulfides; in the Fissural remobilizations and

Stringer the chlorites (phyllosilicates) and quartz are the main minerals in the samples; in the Gossan,

goethite is the most abundant mineral, together with quartz.

The Fissural remobilizations and the Stringer show some similarities, with the difference that in the

first case the sphalerite is far more abundant and that is also true for zinc bearing carbonates

(smithsonite).

Report 027/17


Elemental distribution

Figure 2 – As distribution in the different samples.

Figure 3 – Cu distribution in the different samples.

Figure 4 – Pb distribution in the different samples.

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Figure 5 – Sb distribution in the different samples.

Figure 6 – Zn distribution in the different samples.

Some elements show a distribution more or less similar regardless the type of lithology. Lead, for

example, is present in practically one mineral, galena. Only the sample from the Gossan has a different

distribution of the Lead, near 90% in secondary minerals.

The zinc has a similar behavior; in this case the exception is represented by the samples from the

Fissural remobilizations, where the carbonates (smithsonite) can represent up to 50% of the zinc in

the samples.

The antimony and the arsenic follow the same path, in the sense that arsenopyrite is the main bearer

of these two elements in the Massive sulphides. In the Fissural remobilization samples, the

tetrahedrite (other sulfides) is the main bearer of these two elements.

Copper has a more random distribution, which cannot be directly related to the ore typology

(lithologies).

Report 027/17


Sphalerite and galena size distribution

Figure 7 – Size distribution of the sphalerite in the different ‘lithologies’.

Table 2 – Size distribution of the sphalerite in the different ‘lithologies’ (D values in m).

D value Fissural remobilizations Gossan Massive sulfides Stringer

10 4,9 5,8 5,6 5,6 - 3,8 3,9 4,3 3,4 4,4 3,3 3,8 3,4 5,7 6,9

20 7,2 8,5 7,9 8,2 - 5,2 5,0 5,6 5,1 6,1 5,1 5,1 4,3 8,3 10,0

50 18,5 19,7 18,4 20,2 - 7,8 7,5 9,2 9,0 10,2 9,3 7,9 6,9 18,3 26,2

80 40,7 46,2 45,4 36,6 - 12,1 13,4 21,5 14,9 19,0 14,5 14,5 12,1 34,8 44,3

90 59,3 60,8 60,4 64,9 - 19,8 19,8 37,2 20,5 32,6 18,2 29,1 18,5 64,9 90,3

As we can see in the Figure 7 the sphalerite shows a coarser size distribution in the samples with more

phyllosilicates (Fissural remobilization and Stringer), a fact that favors the liberation of the sphalerite.

Report 027/17


Figure 8 – Size distribution of the galena in the different ‘lithologies’.

Table 3 – Size distribution of the galena in the different ‘lithologies’ (D values in m).

D value Fissural remobilizations Gossan Massive sulfides Stringer

10 2,6 3,2 3,6 3,2 2,8 1,7 2,2 2,5 1,3 2,3 1,4 1,4 1,4 1,8 1,8

20 3,5 4,6 5,0 4,5 3,8 3,1 3,4 4,0 2,2 4,3 2,4 2,6 2,1 2,8 2,0

50 7,0 8,8 10,1 8,7 7,8 6,0 5,8 6,7 6,1 8,1 7,6 5,6 4,5 5,7 3,3

80 18,7 20,6 24,2 16,9 19,8 9,4 9,4 11,2 10,9 14,2 12,4 8,8 7,8 11,8 4,9

90 31,1 47,4 53,9 22,7 20,9 13,4 13,5 17,7 18,3 21,5 16,5 11,0 10,4 14,5 5,3

As we can see in the Figure 8 the galena shows a coarser size distribution in the samples from the

Fissural remobilization. However the galena is finer than the sphalerite, regrinding the samples may

imply losses due to ultrafine particles. In other hand, most of the galena is already liberated, therefor it

will rarely be necessary to regrind.

Report 027/17


Sphalerite grade recovery (Theoretical grade-recovery curve)

Teoretical grade-recovery curve of the sphalerite in the Fissural remobilization samples

Teoretical grade-recovery curve of the sphalerite in the Massive sulfides samples

Teoretical grade-recovery curve of the sphalerite in the Stringer samples

Figure 9 – Theoretical grade-recovery curves of the sphalerite in the different lithologies.

As we can see in the Figure 9 the samples from the Fissural remobilization present the best results

(the curve is near the right upper corner). In the other samples the grind size must be smaller,

especially for the Stringer samples.

Report 027/17


Galena grade recovery (Theoretical grade-recovery curve)

Teoretical grade-recovery curve of the galena in the Fissural remobilization samples

Teoretical grade-recovery curve of the galena in the Massive sulfides samples

Teoretical grade-recovery curve of the galena in the Stringer samples

Figure 10 - Theoretical grade-recovery curves of the galena in the different lithologies.

As we can see in the Figure 10, and as it happens for the sphalerite, the samples from the Fissural

remobilization present the best results (the curve is near the right upper corner). In the other samples

the grind size must be smaller, especially for the Stringer samples. The galena present in the samples

from the Stringer is finer; regrinding the ore may imply losses due to ultrafine particles. A minor

recovery should be considered to prevent a low grade concentrate.

Report 027/17


Sphalerite and Galena liberation

Table 4 – Sphalerite liberation (liberated particles and high grade) in all the samples.

Samples Liberated Liberated +

high grade particles

ST_01/200 60,86 71,81

ST_01/211 74,90 88,05

ST_02/329 65,03 70,16

ST_04/385 88,18 92,89

MS_01/159 - -

MS_01/169 60,32 73,08

MS_01/227 64,60 70,90

MS_01/238 59,36 68,59

MS_02/171 44,95 56,82

MS_02/208 60,88 74,64

MS_02/219 68,67 78,95

MS_03/177 60,68 68,94

MS_03/179 73,52 77,69

MS_03/231 30,24 36,83

MS_03/249 68,70 74,54

Table 5 – Galena liberation (liberated particles and high grade) in all the samples.

Samples Liberated Liberated +

high grade particles

ST_01/200 69,98 72,70

ST_01/211 69,32 71,35

ST_02/329 65,79 74,14

ST_04/385 83,68 90,25

MS_01/159 74,24 74,25

MS_01/169 58,99 62,55

MS_01/227 58,63 63,26

MS_01/238 53,80 60,52

MS_02/171 43,57 48,74

MS_02/208 59,83 66,31

MS_02/219 56,34 60,51

MS_03/177 56,81 60,69

MS_03/179 57,22 54,48

MS_03/231 20,54 22,31

MS_03/249 41,91 41,92

Report 027/17


Some considerations and recommendations

The Sphalerite is the main zinc bearing mineral, usually representing more than 99% of the

element. In the samples from the Fissural remobilization, the carbonates (smithsonite) assume

an expressive distribution of the zinc, which can reach almost 50% (sample ST_01_200). Most

of the analyzed ‘smithsonites’ are in fact a zinc dominant member of the siderite-smithsonite

series, with some Mg and Ca. The secondary minerals have two major advantages: the absence

or very low concentrations of penalizing elements, especially Hg*; the concentration process is

easy and allows higher grade concentrates.

In general most of the sphalerite is liberated. The fully liberated particles represent between

50% and 90% (average about 63%), which is relatively high, especially considering the grind size

(about 60 m). The sum of the liberated and high grade particles (see Table 4) is considerably

higher, reaching an average of about 72% of the total sphalerite. Two samples have shown

lower liberation percentages (MS_02/171 and MS_03/231), regrinding the sample will increase

the liberation of the sphalerite. This also true for all the other samples, since most of the

unliberated sphalerite is included in the coarser particles.

The chemical characterization by EDS has showed that the sphalerite from the Fissural

remobilizations and Stringer have a different composition from the Massive sulfide ones. The

first are almost (by EDS) Hg free, with low Fe content (average 1,3%) and Cd (0,17%) and more

In (0,67%). The sphalerite from the Massive sulfides may contain up to 0,86% of Hg, 4,72% of

Fe, 0,44% of Cd and 0,53% of In. We suggest a quantitative chemical assay (by WDS for

example) in order to confirm these values.

The lead presents similar conditions. Galena is the main Pb bearing mineral, with the exception

of the Gossan, where this element is primarily distributed by secondary minerals (mostly

schultenite).

The liberation of the galena is very similar to that of the sphalerite. The unliberated galena can

also be ‘released’ by a smaller grind size, with some limitations since galena is thinner than

most of the sphalerite.

Report 027/17


The absence of major Ag bearing minerals, as well as the inconstancy of the Ag content in the

tetrahedrite, suggest that the galena is the main Ag bearing mineral. This noble metal is

present in quantities not detectable /measurable by EDS, also here a quantitative chemical

analysis may be of interest.

The Gossan presents a contrasting paragenetic assemblage, when compared with the other

samples. Goethite and quartz are the more abundant minerals, the first one as the typical

result of sulfides oxidation, the second for its resilience against supergenic alteration. Other

secondary minerals are present in significant quantities, mostly lead sulfates and arsenates. The

most exuberant identified minerals are related with the remobilization of minor elements

released by the primary sulfides alteration (Ag, Se, Hg, Au). Although these minerals are not

present in appreciable quantities, their content in target elements (ex: Ag, Au, Se) is quite high.

Another interesting feature of the Gossan is the presence of another resilient mineral –

cassiterite. The estimated Wt. % of SnO2 in the Gossan (by MLA) is about 2,25%. Most of the

cassiterite is liberated or associated to friable goethite. The average size (D50) of the cassiterite

is about 14 m, with a D80 of about 40 m. Also this information would benefit from a

confirmation by a quantitative chemical assay.

Report 027/17


TERMINOLOGY

Size classes*

+63 (sample fraction coarser than 63 m);

30-63 (sample fraction between 30 m and 63 m);



-7 (sample fraction thinner than 7 m).

* all the size values presented from here are based on a bidimensional approximation of the volumes. The approximation used is the maximum diameter (figure 1).

Figure 11 – The different approximations of particle size. A – Equivalent circle; B- equivalent ellipse; C- maximum diameter.

Table 6 – Liberation classes (the target mineral is the blue one).

Liberation classes

By composition 50% 50% 50%

By free surface 0% 50% 100%

The liberation by particle composition refers to the content of the target mineral in the particle, and that value is expressed in weight %;

The liberation by free surface refers to the surface percentage of the target mineral that is exposed.

A B C

Report 027/17


Table 7 – The different Liberation classes by composition (the target mineral is the blue one).

0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90% < x <= 100%

Set of particles where the target mineral represents up

to 25% of its weight.

Set of particles where the target mineral represents between 25 and 50% of its

weight.


weight.


weight.

Set of particles where the target mineral represents

more than 90% of its weight.

Table 8 – Mineral references.

Mineral Density Formula Comments

Sphalerite 4,0 (Zn,Fe)S

Chalcopyrite 4,2 CuFeS2

Galena 7,4 PbS

Pyrite 5,0 FeS2

Tetrahedrite 4,9 Cu6[Cu4(Fe,Zn)2]Sb4S13

Enargite 4,5 Cu3AsS4

Arsenopyrite 6,1 FeAsS

Chalcocite 5,7 Cu2S

Kesterite 4,4 Cu2ZnSnS4

Clausthalite 8,0 PbSe

Tiemannite 8,3 HgSe

Acanthite 7,3 Ag2S

Naumannite 7,5 Ag2Se

Amalgam 8,1 AuAg2Hg

Luanheite 12,5 Ag3Hg

Quartz 2,6 SiO2

Smithsonite 3,9 ZnCO3 With some Fe, Mn, Mg and Ca

Dolomite 2,9 CaMg(CO3)2

Chlorites (2,6 – 3,3) - Chlinochlore and chamosite

Phyllosilicates (2,8 – 3,5) - Moscovite, dickite and phlogopite

Other silicates (2,7 – 3,4) - Diopside, wollastonite and zoisite

Titanite 3,5 CaTi(SiO4)O

Rutile 4,3 TiO2

Cassiterite 6,9 SnO2

Goethite 3,8 α-Fe3+O(OH)

Phosphates (3,2 – 3,6) - Fluorapatite and Florencite-(Ce)

Vanadinite 6,9 Pb5(VO4)3Cl

Schultenite 5,9 Pb(HAsO4)

Sulphur 3,0 S8

Alunite + clay 2,7 - A mixture of amorphous minerals

Others - -

Report 027/17


FISSURAL REMOBILIZATIONS

Sample ST_01/200

Modal mineralogy

Table 9 – Modal mineralogy of the sample ST_01/200.

Mineral Weight % Area % Nº of particles

Sphalerite 10,10 8,78 3240

Chalcopyrite 2,20 1,82 928

Galena 4,85 2,28 2946

Pyrite 26,03 18,07 4715

Tetrahedrite 0,08 0,06 56

Enargite 0,01 0,01 15

Arsenopyrite 0

Chalcocite 1,22 0,75 280

Kesterite 0,03 0,02 23

Clausthalite <0,01 <0,01 8

Tiemannite 0

Acanthite 0

Naumannite 0

Amalgam (AuAgHg) 0

Luanheite 0

Quartz 4,53 6,00 693

Smithsonite 23,43 26,71 8445

Dolomite 0,15 0,18 19

Chlorites 25,47 33,21 16818

Phyllosilicates 0,83 1,04 695

Other silicates 0,43 0,51 238

Titanite <0,01 <0,01 4

Rutile 0,22 0,18 91

Cassiterite 0,01 0,01 5

Goethite 0,03 0,03 23

Phosphates 0,25 0,27 35

Vanadinite 0

Schultenite 0

Sulphur 0

Alunite + clay 0,03 0,03 72

Others 0,08 0,04 25

TOTAL 100,00 100,00 39374

Report 027/17



Table 10 – Elemental distribution of the sample ST_01/200.

Mineral As (%) Cu (%) Fe (%) Pb (%) S (%) Sb(%) Sn (%) Zn (%)

Sphalerite 0,60 18,35 50,78

Chalcopyrite 42,91 2,99 4,02

Galena 99,94 3,40

Pyrite 54,10 72,75

Tetrahedrite 12,91 1,49 0,01 0,10 100,00 0,04

Enargite 87,09 0,30 0,02

Arsenopyrite

Chalcocite 54,94 1,29

Kesterite 0,37 0,01 0,04 38,89 0,04

Clausthalite 0,06

Tiemannite

Acanthite

Naumannite

Amalgam (AuAgHg)

Luanheite

Quartz

Smithsonite 30,97 49,13

Dolomite

Chlorites 10,84

Phyllosilicates

Other silicates 0,01

Titanite <0,01

Rutile

Cassiterite 61,11

Goethite 0,09

Phosphates

Vanadinite

Schultenite

Sulphur

Alunite + clay 0,02

Others 0,37

TOTAL 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00

The elemental distribution achieved by MLA has shown that:

- chalcocite is the main copper mineral, representing 54,94% of this metal in the sample. Chalcopyrite

is the second copper mineral, with 42,91%;

- galena is almost the only lead mineral in the sample, with 99,94%;

- the zinc is distributed evenly between the sphalerite (50,78%) and the smithsonite (49,13%).

Report 027/17


Particle size distribution

Table 11 – Particle size distribution (maximum diameter) of the sample ST_01/200.

Sieve size (m) Retained (Wt. %) Cumulative retained (Wt. %) Cumulative passing (Wt. %)

150 - - 100,00

125 1,51 1,51 98,49

106 3,56 5,07 94,93

90 5,08 10,15 89,85

75 12,07 22,23 77,77

63 8,69 30,91 69,09

53 7,15 38,07 61,93

45 6,97 45,04 54,96

38 5,34 50,38 49,62

32 5,08 55,46 44,54

27 4,89 60,35 39,65

22 5,10 65,44 34,56

19 3,29 68,73 31,27

16 3,02 71,75 28,25

13,5 3,36 75,11 24,89

11,4 3,25 78,36 21,64

9,6 3,01 81,37 18,63

8,1 3,02 84,39 15,61

6,8 2,93 87,33 12,67

5,7 2,64 89,97 10,03

4,8 2,50 92,47 7,53

4,1 1,99 94,47 5,53

3,4 1,87 96,34 3,66

2,9 1,23 97,56 2,44

2,4 1,29 98,86 1,14

2 0,62 99,48 0,52

1,75 0,23 99,71 0,29

1,45 0,11 99,82 0,18

1,2 0,10 99,93 0,07

1 0,04 99,97 0,03

0,87 0,00 99,97 0,03

0,73 0,02 100,00 <0,01

0,62 - 100,00 <0,01

0,52 <0,01 100,00 <0,01

0 - 100,00 -

Report 027/17


Table 12 – Sphalerite grain size distribution (maximum diameter) in the sample ST_01/200.


90 - - 100,00

75 8,08 8,08 91,92

63 - 8,08 91,92

53 5,14 13,21 86,79

45 3,55 16,76 83,24

38 5,26 22,02 77,98

32 7,80 29,82 70,18

27 5,37 35,20 64,80

22 7,61 42,80 57,20

19 6,45 49,26 50,74

16 4,18 53,44 46,56

13,5 6,04 59,48 40,52

11,4 5,58 65,06 34,94

9,6 4,54 69,60 30,40

8,1 5,97 75,57 24,43

6,8 6,23 81,80 18,20

5,7 4,22 86,02 13,98

4,8 4,22 90,24 9,76

4,1 3,17 93,41 6,59

3,4 2,38 95,78 4,22

2,9 2,19 97,97 2,03

2,4 1,47 99,44 0,56

2 0,42 99,85 0,15

1,75 0,06 99,91 0,09

1,45 0,04 99,95 0,05

1,2 0,03 99,98 0,02

1 0,01 99,99 0,01

0,87 <0,01 100,00 <0,01

0,73 <0,01 100,00 <0,01

0,62 <0,01 100,00 <0,01

0,52 <0,01 100,00 <0,01

0 - 100,00 -

Report 027/17


Table 13 – Galena grain size distribution (maximum diameter) in the sample ST_01/200.


45 - - 100,00

38 2,92 2,92 97,08

32 6,64 9,56 90,44

27 2,49 12,05 87,95

22 6,20 18,25 81,75

19 1,55 19,81 80,19

16 1,87 21,68 78,32

13,5 4,55 26,23 73,77

11,4 6,17 32,40 67,60

9,6 5,99 38,39 61,61

8,1 6,45 44,84 55,16

6,8 6,33 51,17 48,83

5,7 6,95 58,11 41,89

4,8 9,30 67,41 32,59

4,1 6,85 74,26 25,74

3,4 6,80 81,06 18,94

2,9 5,80 86,86 13,14

2,4 5,16 92,02 7,98

2 3,40 95,42 4,58

1,75 1,45 96,87 3,13

1,45 1,03 97,90 2,10

1,2 1,47 99,37 0,63

1 0,36 99,73 0,27

0,87 0,21 99,94 0,06

0,73 0,02 99,96 0,04

0,62 0,03 99,99 0,01

0,52 <0,01 100,00 <0,01

0 - 100,00 -

Report 027/17


Table 14 – Chalcopyrite size distribution (maximum diameter) in the sample ST_01/200.


75 - - 100,00

63 14,40 14,40 85,60

53 - 14,40 85,60

45 1,87 16,27 83,73

38 3,88 20,15 79,85

32 5,67 25,82 74,18

27 7,11 32,93 67,07

22 6,83 39,76 60,24

19 3,34 43,10 56,90

16 4,78 47,88 52,12

13,5 4,79 52,67 47,33

11,4 6,28 58,95 41,05

9,6 5,43 64,38 35,62

8,1 5,63 70,01 29,99

6,8 6,46 76,47 23,53

5,7 6,51 82,98 17,02

4,8 4,70 87,68 12,32

4,1 2,97 90,65 9,35

3,4 3,16 93,81 6,19

2,9 2,47 96,28 3,72

2,4 2,26 98,54 1,46

2 0,86 99,40 0,60

1,75 0,23 99,63 0,37

1,45 0,12 99,75 0,25

1,2 0,16 99,91 0,09

1 0,05 99,96 0,04

0,87 0,03 99,98 0,02

0,73 0,01 99,99 0,01

0,62 0,01 100,00 <0,01

0,52 <0,01 100,00 <0,01

0 - 100,00 -

Report 027/17


Table 15 – Chalcocite size distribution (maximum diameter) in the sample ST_01/200.


75 - - 100,00

63 21,93 21,93 78,07

53 - 21,93 78,07

45 1,11 23,05 76,95

38 3,95 27,00 73,00

32 3,70 30,70 69,30

27 7,55 38,25 61,75

22 6,97 45,23 54,77

19 2,98 48,21 51,79

16 5,49 53,70 46,30

13,5 4,44 58,14 41,86

11,4 5,67 63,81 36,19

9,6 10,11 73,92 26,08

8,1 6,67 80,59 19,41

6,8 6,20 86,79 13,21

5,7 2,95 89,75 10,25

4,8 2,35 92,09 7,91

4,1 2,79 94,89 5,11

3,4 1,57 96,46 3,54

2,9 1,51 97,97 2,03

2,4 1,49 99,46 0,54

2 0,32 99,77 0,23

1,75 0,08 99,86 0,14

1,45 0,05 99,91 0,09

1,2 0,06 99,97 0,03

1 0,02 99,98 0,02

0,87 <0,01 99,99 <0,01

0,73 0,01 99,99 0,01

0,62 - 99,99 0,01

0,52 <0,01 99,99 0,01

0 - 100,00 -

Table 16 – Cassiterite size distribution (maximum diameter) in the sample ST_01/200.


9,6 - - 100,00

8,1 30,16 30,16 69,84

6,8 40,40 70,57 29,43

5,7 15,72 86,29 13,71

4,8 - 86,29 13,71

4,1 8,14 94,42 5,58

3,4 - 94,42 5,58

2,9 - 94,42 5,58

2,4 5,58 100,00 -

2 - 100,00 -

Report 027/17


Table 17 – Smithsonite size distribution (maximum diameter) in the sample ST_01/200.


125 - - 100,00

106 1,38 1,38 98,62

90 1,87 3,25 96,75

75 3,73 6,98 93,02

63 5,46 12,44 87,56

53 6,93 19,37 80,63

45 4,71 24,08 75,92

38 6,87 30,94 69,06

32 6,11 37,06 62,94

27 8,10 45,15 54,85

22 5,97 51,12 48,88

19 4,79 55,91 44,09

16 5,33 61,24 38,76

13,5 5,20 66,45 33,55

11,4 5,56 72,01 27,99

9,6 4,86 76,87 23,13

8,1 4,65 81,52 18,48

6,8 4,10 85,62 14,38

5,7 3,44 89,06 10,94

4,8 3,32 92,38 7,62

4,1 2,33 94,71 5,29

3,4 1,85 96,56 3,44

2,9 1,61 98,16 1,84

2,4 1,18 99,35 0,65

2 0,43 99,78 0,22

1,75 0,09 99,87 0,13

1,45 0,05 99,92 0,08

1,2 0,06 99,98 0,02

1 0,01 99,99 0,01

0,87 <0,01 99,99 0,01

0,73 <0,01 99,99 0,01

0,62 <0,01 99,99 0,01

0,52 <0,01 100,00 <0,01

0 - 100,00 -

Report 027/17


Sphalerite distribution and liberation

Table 18 – Sphalerite distribution by grain size classes, in the sample ST_01/200.

Sphalerite distribution by grain size classes *

<7 m 7-15 m 15-30 m 30-63 m >63 m

Sphalerite (% of the mineral) 20,35 24,15 20,00 19,83 15,67

Size distribution… (D80 in m)

… of the particles 5,92 13,07 26,85 55,60 102,50

… of the sphalerite 6,20 12,90 25,21 48,32 82,44

* Size of the particles where the sphalerite is contained (includes liberated sphalerite).

The modal mineralogy of the sample ST_01/200 has shown that the sphalerite represents 10,10% of its

weight. The study of its distribution by size classes allows to say that:

- 15,67% of the sphalerite is included in particles with dimensions higher than 63 m;

- 19,83% of the sphalerite is included in particles with dimensions between 30 m and 63 m;



- 20,35% of the sphalerite is included in particles with dimensions smaller than 7 m.

Report 027/17


Table 19 – Sphalerite distribution by liberation classes, in the sample ST_01/200.

Sphalerite liberation by classes (sphalerite content)

0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Sphalerite 11,94 5,22 11,03 10,95 60,86

Mineral species, or groups, associated to sphalerite (Wt. %)

Galena 2,40 2,65 3,36 1,21 0,28

Chalcopyrite 0,72 9,49 7,72 1,54 0,19

Pyrite 25,40 3,96 3,18 0,49 0,02

Arsenopyrite - - - - -

Other sulfides 1,01 10,92 10,49 0,30 0,22

Cassiterite - - - - -

Quartz 8,83 0,27 - 0,05 0,01

Phyllosilicates 40,39 27,36 7,26 9,36 0,72

Other silicates 0,01 - - 0,02 -

Carbonates 16,64 13,11 5,40 3,72 0,10

Others 0,72 0,07 0,16 0,08 -


weight. The study of its distribution by liberation classes allows to say that:

- 60,86% of the sphalerite is liberated (all the particles with more than 90% of sphalerite);

- 10,95% of the sphalerite is included in rich particles (particles where the sphalerite represents

between 75 and 90%);

- 11,03% of the sphalerite is included in medium grade particles (particles where the sphalerite

represents between 50 and 75%);

- 5,22% of the sphalerite is included in low grade particles (particles where the sphalerite represents


- 11,94% of the sphalerite is included in very low grade particles (particles where the sphalerite

represents less than 25%).

Report 027/17


Table 20 – Combined distribution of the sphalerite (size classes Vs liberation classes) in the sample ST_01/200.

Sphalerite distribution (Wt. %)

Size classes Liberation classes

0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 0,04 0,17 0,35 0,52 19,27

7-15 m 0,26 0,41 0,65 1,70 21,13

15-30 m 0,95 1,27 1,94 2,24 13,59

30-63 m 2,46 1,45 0,84 2,69 12,39

>63 m 5,96 1,32 5,59 2,80 -

Figure 12 – Combined distribution of the sphalerite (size classes Vs liberation classes) in the sample ST_01/200.

As we can see in the Figure 12, most of the sphalerite is liberated. The unliberated mineral (about 10%)

is present in the >63mm fraction.

Report 027/17


Sphalerite distribution and liberation images (by size classes, sorted by decreasing liberation)

<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17


Galena distribution and liberation

Table 21 – Galena distribution by grain size classes, in the sample ST_01/200.

Galena distribution by grain size classes *

<7 m 7-15 m 15-30 m 30-63 m >63 m

Galena (% of the mineral) 37,41 23,13 8,65 19,72 11,10


… of the particles 5,92 13,07 26,85 55,60 102,50

… of the galena 5,57 12,77 24,87 36,75 24,94

* Size of the particles where the sphalerite is contained (includes liberated galena).

The modal mineralogy of the sample ST_01/200 has shown that the galena represents 4,85% of its


- 11,10% of the galena is included in particles with dimensions higher than 63 m;

- 19,72% of the galena is included in particles with dimensions between 30 m and 63 m;



- 37,41% of the galena is included in particles with dimensions smaller than 7 m.

Report 027/17


Table 22 – Galena distribution by liberation classes, in the sample ST_01/200.

Sphalerite liberation by classes (galena content)

0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Galena 19,19 6,97 1,13 2,72 69,98

Mineral species, or groups, associated to galena (Wt. %)

Sphalerite 7,59 7,26 2,23 5,65 0,02

Chalcopyrite 1,09 0,42 5,33 0,08 0,01

Pyrite 33,25 18,52 6,07 4,55 0,04


Other sulfides 1,03 0,83 0,76 1,33 0,01


Quartz 7,01 - 0,68 - <0,01


Other silicates 0,01 - - - -

Carbonates 16,11 17,43 5,96 2,45 0,14

Others 0,53 - - - -



- 69,98% of the galena is liberated (all the particles with more than 90% of galena);

- 2,72% of the galena is included in rich particles (particles where the galena represents between 75

and 90%);

- 1,13% of the galena is included in medium grade particles (particles where the galena represents


- 6,97% of the galena is included in low grade particles (particles where the galena represents between

25 and 50%);

- 19,19% of the galena is included in very low grade particles (particles where the galena represents

less than 25%).

Report 027/17


Table 23 – Combined distribution of the galena (size classes Vs liberation classes) in the sample ST_01/200.

Galena distribution (Wt. %)


0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 0,22 0,38 0,34 0,96 35,52

7-15 m 0,80 0,51 0,30 0,82 20,70

15-30 m 2,07 0,56 0,49 0,95 4,58

30-63 m 8,00 2,53 - - 9,18

>63 m 8,10 2,99 - - -

Figure 13 – Combined distribution of the Galena (size classes Vs liberation classes) in the sample ST_01/200.

As we can see in the Figure 13, most of the galena is liberated. The unliberated mineral is concentrated

in bigger and low grade particles.

Report 027/17


Galena distribution and liberation images (by size classes, sorted by decreasing liberation)

<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17


Sample ST_01/211

Modal mineralogy



Sphalerite 19,67 14,95 2578


Galena 3,09 1,27 673

Pyrite 4,11 2,49 224

Tetrahedrite 0

Enargite <0,01 <0,01 2

Arsenopyrite 0



Clausthalite 0

Tiemannite 0

Acanthite 0

Naumannite 0

Amalgam (AuAgHg) 0

Luanheite 0

Quartz 2,97 3,44 453

Smithsonite 3,22 3,20 546

Dolomite 0,38 0,41 19

Chlorites 60,95 69,48 24027



Titanite <0,01 <0,01 2

Rutile 0,63 0,45 31

Cassiterite <0,01 <0,01 1

Goethite 0,06 0,05 10


Vanadinite 0

Schultenite 0

Sulphur 0


Others 0

TOTAL 100,00 100,00 29956

Report 027/17





Sphalerite 2,87 67,80 93,61


Galena 100,00 4,10

Pyrite 20,81 21,77

Tetrahedrite

Enargite 100,00 0,08 0,01

Arsenopyrite


Kesterite 0,16 0,01 0,02 86,04 0,01

Clausthalite

Tiemannite

Acanthite

Naumannite

Amalgam (AuAgHg)

Luanheite

Quartz


Dolomite

Chlorites 61,30

Phyllosilicates


Titanite 0,00

Rutile

Cassiterite 13,96

Goethite 0,40

Phosphates

Vanadinite

Schultenite

Sulphur

Alunite + clay 0,04

Others

TOTAL 100,00 100,00 100,00 100,00 100,00 0,00 100,00 100,00



is the second copper mineral, with 37,09%;

- galena is the only lead mineral in the sample%;

- the zinc is mostly distributed by the sphalerite (93,61%) and part by the smithsonite (6,38%).

Report 027/17





180 - - 100,00

150 2,23 2,23 97,77

125 2,08 4,31 95,69

106 0,70 5,01 94,99

90 4,14 9,14 90,86

75 6,99 16,13 83,87

63 6,74 22,87 77,13

53 6,57 29,44 70,56

45 6,93 36,37 63,63

38 5,17 41,54 58,46

32 4,54 46,08 53,92

27 4,86 50,94 49,06

22 5,39 56,32 43,68

19 2,83 59,15 40,85

16 4,28 63,43 36,57

13,5 3,60 67,03 32,97

11,4 4,23 71,27 28,73

9,6 3,76 75,03 24,97

8,1 3,80 78,83 21,17

6,8 3,83 82,66 17,34

5,7 3,69 86,35 13,65

4,8 3,16 89,51 10,49

4,1 2,65 92,16 7,84

3,4 2,83 94,99 5,01

2,9 1,73 96,72 3,28

2,4 1,84 98,56 1,44

2 0,96 99,52 0,48

1,75 0,32 99,84 0,16

1,45 0,07 99,91 0,09

1,2 0,06 99,97 0,03

1 0,02 99,99 0,01

0,87 <0,01 99,99 0,01

0,73 0,01 100,00 <0,01

0,62 - 100,00 <0,01

0,52 <0,01 100,00 <0,01

0 - 100,00 -

Report 027/17




106 - - 100,00

90 3,22 3,22 96,78

75 1,84 5,07 94,93

63 3,32 8,39 91,61

53 7,32 15,71 84,29

45 5,06 20,77 79,23

38 5,24 26,01 73,99

32 6,01 32,02 67,98

27 6,55 38,57 61,43

22 8,19 46,76 53,24

19 4,22 50,99 49,01

16 7,31 58,30 41,70

13,5 6,35 64,65 35,35

11,4 6,37 71,02 28,98

9,6 5,47 76,49 23,51

8,1 4,95 81,44 18,56

6,8 4,63 86,06 13,94

5,7 4,18 90,24 9,76

4,8 3,38 93,62 6,38

4,1 2,37 95,99 4,01

3,4 1,82 97,81 2,19

2,9 1,28 99,10 0,90

2,4 0,69 99,78 0,22

2 0,17 99,95 0,05

1,75 0,02 99,97 0,03

1,45 0,01 99,99 0,01

1,2 0,01 99,99 0,01

1 <0,01 100,00 <0,01

0,73 <0,01 100,00 <0,01

0,62 <0,01 100,00 <0,01

0,52 <0,01 100,00 <0,01

0 - 100,00 -

Report 027/17




53 - - 100,00

45 14,39 14,39 85,61

38 - 14,39 85,61

32 - 14,39 85,61

27 2,00 16,38 83,62

22 1,58 17,96 82,04

19 4,35 22,31 77,69

16 8,05 30,36 69,64

13,5 4,77 35,13 64,87

11,4 5,48 40,60 59,40

9,6 4,83 45,43 54,57

8,1 8,45 53,88 46,12

6,8 8,90 62,78 37,22

5,7 8,72 71,50 28,50

4,8 7,09 78,59 21,41

4,1 4,39 82,98 17,02

3,4 5,91 88,89 11,11

2,9 3,54 92,42 7,58

2,4 4,24 96,67 3,33

2 1,83 98,49 1,51

1,75 0,65 99,15 0,85

1,45 0,35 99,50 0,50

1,2 0,33 99,83 0,17

1 0,12 99,95 0,05

0,73 0,04 99,99 0,01

0,62 0,01 100,00 <0,01

0,52 - 100,00 <0,01

0 - 100,00 -

Report 027/17




38 - - 100,00

32 7,65 7,65 92,35

27 8,59 16,24 83,76

22 5,71 21,95 78,05

19 - 21,95 78,05

16 6,77 28,72 71,28

13,5 13,13 41,85 58,15

11,4 11,82 53,68 46,32

9,6 10,81 64,49 35,51

8,1 7,23 71,72 28,28

6,8 6,89 78,61 21,39

5,7 6,63 85,24 14,76

4,8 5,09 90,34 9,66

4,1 3,61 93,94 6,06

3,4 3,47 97,42 2,58

2,9 0,88 98,29 1,71

2,4 1,33 99,62 0,38

2 0,26 99,88 0,12

1,75 - 99,88 0,12

1,45 0,05 99,93 0,07

1,2 0,05 99,99 0,01

1 0,01 100,00 <0,01

0,73 - 100,00 <0,01

0,62 - 100,00 <0,01

0,52 <0,01 100,00 <0,01

0 - 100,00 -

Report 027/17




75 - - 100,00

63 22,35 22,35 77,65

53 - 22,35 77,65

45 - 22,35 77,65

38 24,53 46,88 53,12

32 15,28 62,16 37,84

27 - 62,16 37,84

22 - 62,16 37,84

19 - 62,16 37,84

16 2,89 65,05 34,95

13,5 2,28 67,33 32,67

11,4 5,97 73,29 26,71

9,6 6,60 79,90 20,10

8,1 7,36 87,25 12,75

6,8 5,72 92,97 7,03

5,7 3,71 96,68 3,32

4,8 1,50 98,18 1,82

4,1 0,61 98,79 1,21

3,4 0,10 98,89 1,11

2,9 0,59 99,47 0,53

2,4 0,42 99,89 0,11

2 - 99,89 0,11

1,75 0,03 99,92 0,08

1,45 0,06 99,98 0,02

1,2 - 99,98 0,02

1 - 99,98 0,02

0,73 0,01 99,99 0,01

0,62 - 99,99 0,01

0,52 0,01 99,99 0,01

0 - 100,00 -



1,75 - - 100,00

1,45 100,00 100,00 -

1,2 - 100,00 -

Report 027/17




75 - - 100,00

63 12,82 12,82 87,18

53 10,20 23,02 76,98

45 - 23,02 76,98

38 12,90 35,92 64,08

32 1,46 37,38 62,62

27 8,17 45,55 54,45

22 6,06 51,61 48,39

19 6,90 58,50 41,50

16 6,73 65,23 34,77

13,5 6,03 71,26 28,74

11,4 5,11 76,37 23,63

9,6 4,02 80,39 19,61

8,1 4,33 84,72 15,28

6,8 3,48 88,20 11,80

5,7 3,00 91,20 8,80

4,8 2,77 93,98 6,02

4,1 2,30 96,27 3,73

3,4 1,49 97,76 2,24

2,9 1,03 98,79 1,21

2,4 0,81 99,60 0,40

2 0,31 99,92 0,08

1,75 0,03 99,95 0,05

1,45 0,01 99,96 0,04

1,2 0,03 99,99 0,01

1 0,01 100,00 <0,01

0,73 <0,01 100,00 <0,01

0,62 <0,01 100,00 <0,01

0,52 - 100,00 <0,01

0 - 100,00 -

Report 027/17





<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 5,93 12,91 26,71 55,39 117,79










Report 027/17




0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Sphalerite 3,45 2,50 5,99 13,15 74,90


Galena 2,15 6,10 11,82 2,05 0,22

Chalcopyrite 0,71 4,32 3,00 2,30 0,17

Pyrite 14,02 3,27 0,14 0,59 -


Other sulfides 2,45 0,24 1,21 - 0,01

Cassiterite <0,01 - - - -

Quartz 7,01 - 0,23 0,04 <0,01


Other silicates <0,01 - 0,25 0,01 <0,01

Carbonates 4,15 0,40 0,34 0,01 0,03

Others 0,70 0,05 - - -












Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 0,02 0,03 0,17 0,22 12,97

7-15 m 0,16 0,37 0,73 1,27 19,57

15-30 m 0,40 0,55 1,92 2,07 19,58

30-63 m 1,49 1,55 2,10 2,65 17,62

>63 m 1,38 - 1,07 6,94 5,16


As we can see in the Figure 14, most of the sphalerite is liberated. The major part unliberated

sphalerite (about 25%) is present in high grade particles, mostly in the coarser fractions.

Report 027/17



<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17





<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 5,93 12,91 26,71 55,39 117,79

… of the galena 6,22 12,37 17,81 50,07 27,78









Report 027/17




0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Galena 18,29 6,72 3,64 2,03 69,32


Sphalerite 21,16 29,76 14,58 10,33 0,01

Chalcopyrite 0,23 6,85 - - -

Pyrite 12,58 0,26 - 4,08 0,01


Other sulfides 0,14 - 2,56 - -


Quartz 6,37 0,22 - - -



Carbonates 0,62 19,70 - - 0,03

Others 0,67 - - - -





and 90%);




25 and 50%);


less than 25%).

Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 0,13 0,08 0,52 0,09 31,98

7-15 m 0,89 0,65 1,87 0,75 19,96

15-30 m 1,24 1,64 1,25 1,20 2,99

30-63 m 7,60 4,35 - - 14,39

>63 m 8,43 - - - -




Report 027/17



<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17


Sample ST_02/329

Modal mineralogy



Sphalerite 16,55 14,38 2291


Galena 12,07 5,67 2182

Pyrite 4,93 3,42 501

Tetrahedrite <0,01 <0,01 2

Enargite 0,01 0,01 8

Arsenopyrite 0


Kesterite 0


Tiemannite 0

Acanthite 0

Naumannite 0

Amalgam (AuAgHg) 0

Luanheite 0

Quartz 17,57 23,25 4034


Dolomite 2,84 3,46 625

Chlorites 21,75 26,66 10902



Titanite <0,01 <0,01 3

Rutile 0,15 0,12 48


Goethite 0,04 0,04 11


Vanadinite 0

Schultenite 0

Sulphur 0

Alunite + clay 0,05 0,06 117

Others 0,10 0,04 14

TOTAL 100,00 100,00 26662

Report 027/17





Sphalerite 1,99 37,39 92,87


Galena 99,98 10,51

Pyrite 20,55 17,10

Tetrahedrite 0,42 0,01 <0,01 <0,01 100,00 <0,01

Enargite 99,58 0,10 0,02

Arsenopyrite


Kesterite

Clausthalite 0,02

Tiemannite

Acanthite

Naumannite

Amalgam (AuAgHg)

Luanheite

Quartz


Dolomite

Chlorites 25,70

Phyllosilicates


Titanite <0,01

Rutile

Cassiterite 100,00

Goethite 0,22

Phosphates

Vanadinite

Schultenite

Sulphur

Alunite + clay 0,05

Others 0,91

TOTAL 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00


- chalcopyrite is the main copper mineral, representing 98,27% of this metal in the sample. Chalcocite

is the second copper mineral, representing only 1,61%;


- the zinc is present mainly as sphalerite (92,87%) and, with low expression, as smithsonite (7,13%).

Report 027/17





180 - - 100,00

150 2,42 2,42 97,58

125 2,41 4,83 95,17

106 0,96 5,78 94,22

90 1,04 6,82 93,18

75 4,75 11,57 88,43

63 6,50 18,07 81,93

53 5,19 23,26 76,74

45 4,95 28,20 71,80

38 5,38 33,58 66,42

32 5,47 39,05 60,95

27 3,82 42,87 57,13

22 5,95 48,82 51,18

19 3,68 52,50 47,50

16 4,87 57,38 42,62

13,5 4,75 62,13 37,87

11,4 5,13 67,26 32,74

9,6 4,69 71,95 28,05

8,1 4,74 76,69 23,31

6,8 4,79 81,48 18,52

5,7 4,54 86,03 13,97

4,8 3,95 89,98 10,02

4,1 2,98 92,95 7,05

3,4 2,73 95,69 4,31

2,9 1,55 97,24 2,76

2,4 1,54 98,78 1,22

2 0,79 99,56 0,44

1,75 0,25 99,82 0,18

1,45 0,08 99,90 0,10

1,2 0,07 99,97 0,03

1 0,02 99,99 0,01

0,87 <0,01 99,99 0,01

0,73 0,01 100,00 <0,01

0,62 - 100,00 <0,01

0,52 <0,01 100,00 <0,01

0 <0,01 100,00 -

Report 027/17




125 - - 100,00

106 3,25 3,25 96,75

90 - 3,25 96,75

75 1,76 5,01 94,99

63 3,25 8,26 91,74

53 6,67 14,93 85,07

45 5,32 20,25 79,75

38 4,95 25,20 74,80

32 7,07 32,27 67,73

27 4,30 36,57 63,43

22 7,31 43,88 56,12

19 5,12 49,00 51,00

16 5,06 54,07 45,93

13,5 5,90 59,96 40,04

11,4 6,75 66,72 33,28

9,6 5,74 72,46 27,54

8,1 6,67 79,13 20,87

6,8 5,84 84,98 15,02

5,7 4,78 89,76 10,24

4,8 3,79 93,55 6,45

4,1 2,57 96,12 3,88

3,4 1,73 97,85 2,15

2,9 1,09 98,94 1,06

2,4 0,71 99,65 0,35

2 0,26 99,91 0,09

1,75 0,04 99,95 0,05

1,45 0,02 99,97 0,03

1,2 0,02 99,99 0,01

1 0,01 100,00 <0,01

0,87 <0,01 100,00 <0,01

0,73 <0,01 100,00 <0,01

0,62 - 100,00 <0,01

0,52 <0,01 100,00 <0,01

0 - 100,00 -

Report 027/17




75 - - 100,00

63 4,45 4,45 95,55

53 6,11 10,56 89,44

45 - 10,56 89,44

38 2,09 12,65 87,35

32 0,72 13,37 86,63

27 3,30 16,68 83,32

22 5,84 22,52 77,48

19 2,83 25,35 74,65

16 6,39 31,73 68,27

13,5 7,17 38,91 61,09

11,4 6,83 45,74 54,26

9,6 6,09 51,82 48,18

8,1 7,09 58,91 41,09

6,8 7,29 66,20 33,80

5,7 8,06 74,26 25,74

4,8 7,43 81,69 18,31

4,1 5,03 86,72 13,28

3,4 4,41 91,13 8,87

2,9 3,38 94,51 5,49

2,4 2,59 97,10 2,90

2 1,58 98,68 1,32

1,75 0,45 99,14 0,86

1,45 0,30 99,43 0,57

1,2 0,37 99,80 0,20

1 0,13 99,93 0,07

0,87 0,06 99,99 0,01

0,73 0,01 100,00 <0,01

0,62 <0,01 100,00 <0,01

0,52 <0,01 100,00 <0,01

0 - 100,00 -

Report 027/17




125 - - 100,00

106 5,82 5,82 94,18

90 - 5,82 94,18

75 3,77 9,59 90,41

63 5,08 14,67 85,33

53 1,50 16,17 83,83

45 3,99 20,16 79,84

38 7,89 28,05 71,95

32 5,56 33,60 66,40

27 5,25 38,85 61,15

22 6,02 44,88 55,12

19 3,62 48,50 51,50

16 4,39 52,88 47,12

13,5 6,37 59,25 40,75

11,4 7,07 66,32 33,68

9,6 6,46 72,78 27,22

8,1 6,04 78,82 21,18

6,8 6,23 85,05 14,95

5,7 5,16 90,21 9,79

4,8 3,99 94,20 5,80

4,1 2,86 97,06 2,94

3,4 1,42 98,48 1,52

2,9 0,79 99,28 0,72

2,4 0,49 99,77 0,23

2 0,14 99,91 0,09

1,75 0,04 99,95 0,05

1,45 0,03 99,97 0,03

1,2 0,02 99,99 0,01

1 0,01 100,00 <0,01

0,87 <0,01 100,00 <0,01

0,73 <0,01 100,00 <0,01

0,62 - 100,00 <0,01

0,52 <0,01 100,00 <0,01

0 - 100,00 -

Report 027/17




19 - - 100,00

16 39,03 39,03 60,97

13,5 21,05 60,08 39,92

11,4 - 60,08 39,92

9,6 7,25 67,33 32,67

8,1 16,63 83,96 16,04

6,8 4,50 88,45 11,55

5,7 4,31 92,76 7,24

4,8 - 92,76 7,24

4,1 1,80 94,57 5,43

3,4 1,65 96,21 3,79

2,9 0,94 97,15 2,85

2,4 1,62 98,77 1,23

2 0,89 99,66 0,34

1,75 0,34 100,00 -

1,45 - 100,00 -



11,4 - - 100,00

9,6 54,69 54,69 45,31

8,1 - 54,69 45,31

6,8 34,27 88,96 11,04

5,7 - 88,96 11,04

4,8 88,96 11,04

4,1 - 88,96 11,04

3,4 7,50 96,46 3,54

2,9 - 96,46 3,54

2,4 3,54 100,00 -

2 - 100,00 -

Report 027/17




163 - - 100,00

53 15,65 15,65 84,35

45 11,96 27,61 72,39

38 4,89 32,50 67,50

32 2,39 34,89 65,11

27 6,55 41,44 58,56

22 5,91 47,36 52,64

19 2,91 50,27 49,73

16 8,75 59,02 40,98

13,5 4,79 63,81 36,19

11,4 5,50 69,31 30,69

9,6 4,22 73,53 26,47

8,1 5,58 79,11 20,89

6,8 5,02 84,13 15,87

5,7 4,18 88,31 11,69

4,8 2,90 91,21 8,79

4,1 2,92 94,13 5,87

3,4 2,71 96,84 3,16

2,9 1,55 98,39 1,61

2,4 1,03 99,42 0,58

2 0,47 99,89 0,11

1,75 0,07 99,95 0,05

1,45 0,02 99,98 0,02

1,2 0,02 99,99 0,01

1 0,01 100,00 <0,01

0,87 <0,01 100,00 <0,01

0,73 - 100,00 <0,01

0,62 - 100,00 <0,01

0,52 - 100,00 <0,01

0 - 100,00 -

Report 027/17





<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 6,07 13,00 25,79 54,31 137,59










Report 027/17




0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Sphalerite 5,15 9,54 15,16 5,13 65,03


Galena 17,19 15,03 14,59 7,94 0,95

Chalcopyrite 35,13 38,40 20,10 5,37 0,35

Pyrite 7,93 1,94 3,22 0,25 <0,01


Other sulfides 0,09 - - - -


Quartz 10,85 0,26 0,18 0,13 0,07


Other silicates 0,06 0,03 0,02

Carbonates 4,11 1,30 0,34 1,71 0,01

Others 0,02 - - -












Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 0,05 0,10 0,33 0,25 13,92

7-15 m 0,44 0,76 1,71 2,56 18,82

15-30 m 1,01 1,37 2,47 0,84 14,72

30-63 m 1,70 1,93 4,00 1,47 17,56

>63 m 1,95 5,39 6,65 - -


As we can see in the Figure 16, most of the sphalerite is liberated. Most of the unliberated mineral is

present in the coarser fractions.

Report 027/17



<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17





<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 6,07 13,00 25,79 54,31 137,59

… of the galena 6,08 12,24 23,70 57,12 67,98









Report 027/17




0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Galena 10,03 11,26 4,58 8,35 65,79


Sphalerite 36,60 23,13 17,74 3,22 0,16

Chalcopyrite 30,08 29,68 16,95 11,93 0,10

Pyrite 11,58 0,22 0,30 0,28 -


Other sulfides 0,08 0,02 0,56 0,07 0,03


Quartz 1,98 0,88 0,87 0,37 0,05


Other silicates 0,02 - - - <0,01

Carbonates 5,24 4,51 0,32 0,05 0,01

Others 0,11 - - - <0,01





and 90%);



- 11,26% of the galena is included in low grade particles (particles where the galena represents



less than 25%).

Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 0,21 0,31 0,39 0,45 26,96

7-15 m 1,14 1,77 1,11 1,33 19,89

15-30 m 1,30 3,26 2,09 1,29 12,41

30-63 m 2,88 1,83 0,99 0,82 6,52

>63 m 4,48 4,09 - 4,46 -




Report 027/17



<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17


Sample ST_04/385

Modal mineralogy



Sphalerite 5,98 4,50 906


Galena 4,95 2,01 1195

Pyrite 5,67 3,41 547


Enargite 0

Arsenopyrite 0

Chalcocite <0,01 <0,01 1

Kesterite 0


Tiemannite 0

Acanthite 0

Naumannite 0

Amalgam (AuAgHg) 0

Luanheite 0

Quartz 29,73 34,10 5493


Dolomite 19,96 21,08 4844

Chlorites 22,73 25,59 12267



Titanite 0,01 0,01 4

Rutile 0,38 0,27 56

Cassiterite 0

Goethite 0,05 0,04 16


Vanadinite 0,06 0,03 71

Schultenite 0,07 0,03 58

Sulphur 0

Alunite + clay 0,07 0,08 120

Others 0,19 0,07 24

TOTAL 100,00 100,00 28522

Report 027/17





Sphalerite 1,09 27,17 86,04


Galena 97,98 8,66

Pyrite 35,77 39,57

Tetrahedrite 0,49 0,33 0,01 0,06 100,00 0,03

Enargite

Arsenopyrite

Chalcocite 0,03 <0,01

Kesterite

Clausthalite 0,03

Tiemannite

Acanthite

Naumannite

Amalgam (AuAgHg)

Luanheite

Quartz


Dolomite

Chlorites 28,71

Phyllosilicates


Titanite <0,01

Rutile

Cassiterite

Goethite 0,43

Phosphates

Vanadinite 1,08


Sulphur

Alunite + clay 0,14

Others 2,57

TOTAL 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00


- chalcopyrite is the main copper mineral, representing 99,65% of this metal in the sample;


- the zinc is distributed, mainly, by the sphalerite (86,04%) and by the smithsonite (13,93%).

Report 027/17





150 - - 100,00

125 0,53 0,53 99,47

106 1,04 1,58 98,42

90 4,25 5,83 94,17

75 4,89 10,72 89,28

63 7,56 18,28 81,72

53 5,85 24,14 75,86

45 5,52 29,66 70,34

38 5,79 35,44 64,56

32 5,61 41,06 58,94

27 6,31 47,37 52,63

22 6,66 54,02 45,98

19 3,94 57,97 42,03

16 4,94 62,90 37,10

13,5 4,27 67,17 32,83

11,4 4,36 71,54 28,46

9,6 3,94 75,48 24,52

8,1 3,89 79,37 20,63

6,8 4,10 83,48 16,52

5,7 3,70 87,18 12,82

4,8 3,32 90,50 9,50

4,1 2,62 93,12 6,88

3,4 2,53 95,64 4,36

2,9 1,59 97,23 2,77

2,4 1,60 98,83 1,17

2 0,79 99,63 0,37

1,75 0,25 99,87 0,13

1,45 0,06 99,93 0,07

1,2 0,05 99,98 0,02

1 0,01 99,99 0,01

0,87 <0,01 99,99 0,01

0,73 0,01 100,00 <0,01

0,62 - 100,00 <0,01

0,52 <0,01 100,00 <0,01

0 - 100,00 -

Report 027/17




75 - - 100,00

63 11,93 11,93 88,07

53 2,54 14,47 85,53

45 - 14,47 85,53

38 3,59 18,06 81,94

32 8,10 26,16 73,84

27 9,30 35,46 64,54

22 11,07 46,53 53,47

19 5,70 52,23 47,77

16 6,84 59,07 40,93

13,5 5,06 64,13 35,87

11,4 4,67 68,80 31,20

9,6 5,34 74,13 25,87

8,1 6,34 80,47 19,53

6,8 4,84 85,32 14,68

5,7 4,32 89,63 10,37

4,8 3,66 93,29 6,71

4,1 2,44 95,73 4,27

3,4 1,67 97,40 2,60

2,9 1,49 98,90 1,10

2,4 0,77 99,67 0,33

2 0,28 99,94 0,06

1,75 0,03 99,97 0,03

1,45 <0,01 99,98 0,02

1,2 0,02 99,99 0,01

1 <0,01 100,00 <0,01

0,87 <0,01 100,00 <0,01

0,73 - 100,00 <0,01

0,62 <0,01 100,00 <0,01

0,52 <0,01 100,00 <0,01

0 - 100,00 -

Report 027/17




38 - - 100,00

32 3,68 3,68 96,32

27 2,27 5,95 94,05

22 4,68 10,63 89,37

19 5,82 16,45 83,55

16 5,14 21,59 78,41

13,5 10,07 31,65 68,35

11,4 7,73 39,38 60,62

9,6 7,11 46,50 53,50

8,1 5,66 52,15 47,85

6,8 8,63 60,79 39,21

5,7 8,16 68,95 31,05

4,8 8,74 77,69 22,31

4,1 5,53 83,22 16,78

3,4 4,63 87,85 12,15

2,9 4,86 92,71 7,29

2,4 3,98 96,69 3,31

2 2,26 98,95 1,05

1,75 0,44 99,38 0,62

1,45 0,28 99,66 0,34

1,2 0,24 99,90 0,10

1 0,05 99,95 0,05

0,87 0,03 99,98 0,02

0,73 <0,01 99,98 0,02

0,62 0,01 100,00 <0,01

0,52 <0,01 100,00 <0,01

0 - 100,00 -

Report 027/17




75 - - 100,00

63 6,50 6,50 93,50

53 - 6,50 93,50

45 8,31 14,81 85,19

38 4,28 19,09 80,91

32 3,12 22,21 77,79

27 6,12 28,34 71,66

22 10,50 38,83 61,17

19 2,65 41,48 58,52

16 10,45 51,93 48,07

13,5 6,03 57,96 42,04

11,4 7,88 65,84 34,16

9,6 6,13 71,97 28,03

8,1 6,78 78,75 21,25

6,8 5,73 84,48 15,52

5,7 4,89 89,37 10,63

4,8 3,60 92,97 7,03

4,1 2,99 95,96 4,04

3,4 2,11 98,07 1,93

2,9 0,98 99,05 0,95

2,4 0,68 99,73 0,27

2 0,19 99,92 0,08

1,75 0,04 99,96 0,04

1,45 0,01 99,97 0,03

1,2 0,02 99,99 0,01

1 <0,01 100,00 <0,01

0,73 <0,01 100,00 <0,01

0,62 <0,01 100,00 <0,01

0,52 - 100,00 <0,01

0 - 100,00 -

Report 027/17




90 - - 100,00

75 12,95 12,95 87,05

63 12,43 25,38 74,62

53 - 25,38 74,62

45 6,70 32,08 67,92

38 12,38 44,45 55,55

32 5,21 49,67 50,33

27 5,86 55,53 44,47

22 4,55 60,08 39,92

19 1,42 61,49 38,51

16 2,25 63,75 36,25

13,5 4,43 68,18 31,82

11,4 7,16 75,34 24,66

9,6 3,94 79,28 20,72

8,1 5,45 84,72 15,28

6,8 4,87 89,59 10,41

5,7 3,04 92,63 7,37

4,8 2,60 95,22 4,78

4,1 1,69 96,91 3,09

3,4 1,49 98,40 1,60

2,9 0,71 99,11 0,89

2,4 0,66 99,77 0,23

2 0,14 99,90 0,10

1,75 0,05 99,95 0,05

1,45 0,02 99,97 0,03

1,2 0,02 99,99 0,01

1 0,01 99,99 0,01

0,87 <0,01 100,00 <0,01

0,73 <0,01 100,00 <0,01

0,62 - 100,00 <0,01

0,52 - 100,00 <0,01

0 <0,01 100,00 -

Report 027/17





<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 5,98 13,01 26,36 54,17 98,18










Report 027/17




0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Sphalerite 1,05 1,20 4,87 4,70 88,18


Galena 7,82 27,53 10,85 6,51 0,21

Chalcopyrite 5,85 7,55 17,62 5,91 0,92

Pyrite 5,07 24,69 - - 0,02


Other sulfides - - - - -

Cassiterite - - - -

Quartz 39,94 1,00 1,99 1,08 0,02


Other silicates 0,11 - - - 0,01

Carbonates 9,83 0,42 1,18 1,28 0,01

Others 0,06 0,43 - - -












Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 0,02 0,08 0,17 0,28 14,77

7-15 m 0,14 0,42 1,21 0,61 18,75

15-30 m 0,09 0,70 1,00 3,82 22,92

30-63 m 0,55 - 2,48 - 19,81

>63 m 0,24 - - - 11,93


As we can see in the Figure 18, most of the sphalerite is liberated. The unliberated mineral (about 12%)

is present in high grade particles (near liberated), distributed in the coarser size fractions.

Report 027/17



<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

>63 m

Report 027/17





<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 5,98 13,01 26,36 54,17 98,18

… of the galena 5,96 13,29 24,49 36,04 20,88









Report 027/17




0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Galena 4,57 1,89 3,30 6,57 83,68


Sphalerite 6,24 29,47 11,53 1,19 0,02

Chalcopyrite 7,52 4,60 2,82 - 0,21

Pyrite 28,10 9,44 1,14 - 0,01


Other sulfides 0,01 - - 0,41 -


Quartz 19,09 4,66 3,87 2,44 0,04



Carbonates 19,98 4,03 11,16 0,77 0,01

Others 2,63 1,95 4,22 8,89 0,57





and 90%);




25 and 50%);

- 4,57% of the galena is included in very low grade particles (particles where the galena represents less

than 25%).

Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 0,14 0,22 0,72 2,53 34,27

7-15 m 0,53 1,04 0,70 1,90 27,93

15-30 m 1,29 0,63 1,25 2,13 17,80

30-63 m 1,69 - 0,64 - 3,68

>63 m 0,92 - - - -



in medium to high grade particles (near liberated).

Report 027/17



<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17


GOSSAN

Sample MS_01/159

Modal mineralogy

Table 67 – Modal mineralogy of the sample MS_01/159.


Sphalerite 0

Chalcopyrite <0,01 <0,01 3

Galena 0,15 0,06 50

Pyrite 0,68 0,43 112

Tetrahedrite 0

Enargite 0

Arsenopyrite 0


Kesterite 0

Clausthalite 0,03 0,01 15

Tiemannite 0,10 0,04 20

Acanthite 0

Naumannite 0

Amalgam (AuAgHg) <0,01 <0,01 3

Luanheite 0,02 <0,01 5

Quartz 37,79 45,26 7856


Dolomite <0,01 <0,01 1

Chlorites 12,82 15,12 5012




Rutile 0,06 0,05 1


Goethite 37,26 30,83 2558


Vanadinite 0,26 0,12 129

Schultenite 1,22 0,64 395

Sulphur 0

Alunite + clay <0,01 <0,01 11

Others 0,07 0,03 19

TOTAL 100,00 100,00 25206

Report 027/17


Table 68 – Modal mineralogy of the subsample MS_01/159 (second scan in SPL Mode, for bright phases, 15000 particles).


Clausthalite 0,16 0,06 55

Tiemannite 0,13 0,05 59

Acanthite <0,01 <0,01 2

Naumannite <0,01 <0,01 3

Amalgam (AuAgHg) 0,01 <0,01 4

Luanheite 0,08 0,02 20


TOTAL 100,00 100,00 500

Some minerals are present in the sample in low concentrations, mostly Ag, Au, Hg and Se bearing

minerals. Despite the statistical representativeness of the method (MLA), who analyses 25000 to

35000 particles in each sample, some may not be ‘found’. In such cases a second scan is preformed,

the SPL (Sparse Phase Liberation) mode, specially designed for Noble metals. In this mode only bright

phases (heavy minerals) are analyzed, which increases the success of the search but is not

representative for a modal analysis. The data gathered must be compared with another heavy mineral

more abundant, in this case cassiterite was the choice.

The modal mineralogy of the heavy minerals was recalculated based on the comparison with

cassiterite abundance (Table 68).

Report 027/17



Table 69 – Elemental distribution of the sample MS_01/159.

Mineral Ag (%) As (%) Au (%) Cu (%) Fe (%) Hg(%) Pb (%) S (%) Se(%) Sn (%) Zn (%)

Sphalerite

Chalcopyrite 6,98 <0,01 0,23

Galena 12,26 5,21

Pyrite 1,16 93,63

Arsenopyrite


Kesterite

Clausthalite 1,73 53,26

Tiemannite 73,73 46,18

Acanthite 8,20

Naumannite 2,30 0,56

Amalgam (AuAgHg) 7,11 100,00 2,59

Luanheite 82,40 23,66

Quartz


Dolomite

Chlorites 4,29

Phyllosilicates

Other silicates <0,01

Titanite <0,01

Rutile

Cassiterite 100,00

Goethite 85,08

Phosphates

Vanadinite 18,08


Sulphur

Alunite + clay 0,15

Others 0,25

TOTAL 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00


- chalcocite is the main copper mineral, representing 93,02% of this metal in the sample;

- Schultenite is the main lead mineral, with 67,93% and the same for arsenic (100,0%);

- Smithsonite is the only zinc mineral (100,0%);

- Luanheite is the main silver mineral (82,40%), the remaining silver is distributed by the acanthite and

the amalgam, which is also the main gold carrier;

- Tiemannite is the main mercury mineral, representing (73,73%), which is also an important carrier of

selenium (46,18%). The main selenium carrier is the clausthalite, representing 53,26% of this metal.

Report 027/17


Table 70 – Particle size distribution (maximum diameter) of the sample MS_01/159.


150 - - 100,00

125 3,40 3,40 96,60

106 4,56 7,95 92,05

90 8,51 16,46 83,54

75 10,81 27,26 72,74

63 10,23 37,49 62,51

53 11,53 49,02 50,98

45 7,69 56,71 43,29

38 5,24 61,95 38,05

32 4,60 66,55 33,45

27 4,08 70,63 29,37

22 3,32 73,95 26,05

19 1,91 75,86 24,14

16 2,62 78,48 21,52

13,5 2,23 80,71 19,29

11,4 2,14 82,85 17,15

9,6 1,81 84,66 15,34

8,1 1,92 86,57 13,43

6,8 2,09 88,67 11,33

5,7 2,02 90,68 9,32

4,8 1,88 92,56 7,44

4,1 1,87 94,42 5,58

3,4 1,91 96,33 3,67

2,9 1,26 97,59 2,41

2,4 1,27 98,85 1,15

2 0,69 99,54 0,46

1,75 0,27 99,81 0,19

1,45 0,09 99,90 0,10

1,2 0,07 99,97 0,03

1 0,02 99,99 0,01

0,87 <0,01 99,99 0,01

0,73 0,01 100,00 <0,01

0,62 - 100,00 <0,01

0,52 <0,01 100,00 <0,01

0 - 100,00 -

Report 027/17


Table 71 – Galena grain size distribution (maximum diameter) in the sample MS_01/159.


22 - - 100,00

19 27,78 27,78 72,22

16 - 27,78 72,22

13,5 - 27,78 72,22

11,4 - 27,78 72,22

9,6 12,15 39,93 60,07

8,1 6,98 46,91 53,09

6,8 12,79 59,70 40,30

5,7 5,15 64,84 35,16

4,8 5,94 70,78 29,22

4,1 6,90 77,68 22,32

3,4 6,29 83,96 16,04

2,9 4,79 88,75 11,25

2,4 7,03 95,78 4,22

2 2,88 98,66 1,34

1,75 - 98,66 1,34

1,45 0,41 99,06 0,94

1,2 0,72 99,78 0,22

1 - 99,78 0,22

0,87 0,16 99,94 0,06

0,73 - 99,94 0,06

0,62 0,05 99,99 0,01

0,52 - 99,99 0,01

0 - 100,00 -

Table 72 – Chalcocite size distribution (maximum diameter) in the sample MS_01/159.


11,4 - - 100,00

9,6 79,56 79,56 20,44

8,1 - 79,56 20,44

6,8 - 79,56 20,44

5,7 - 79,56 20,44

4,8 - 79,56 20,44

4,1 - 79,56 20,44

3,4 16,59 96,15 3,85

2,9 - 96,15 3,85

2,4 3,67 99,82 0,18

2 - 99,82 0,18

1,75 - 99,82 0,18

1,45 - 99,82 0,18

1,2 - 99,82 0,18

1 - 99,82 0,18

0,73 - 99,82 0,18

0,62 - 99,82 0,18

0,52 0,18 100,00 -

Report 027/17


Table 73 – Cassiterite grain size distribution (maximum diameter) in the sample MS_01/159.


63 - - 100,00

53 4,85 4,85 95,15

45 6,78 11,63 88,37

38 8,58 20,20 79,80

32 - 20,20 79,80

27 7,42 27,62 72,38

22 5,97 33,59 66,41

19 4,09 37,68 62,32

16 6,92 44,59 55,41

13,5 6,02 50,61 49,39

11,4 3,00 53,61 46,39

9,6 4,69 58,30 41,70

8,1 5,48 63,78 36,22

6,8 6,45 70,23 29,77

5,7 7,45 77,69 22,31

4,8 6,62 84,31 15,69

4,1 4,03 88,33 11,67

3,4 3,72 92,05 7,95

2,9 3,65 95,70 4,30

2,4 2,54 98,23 1,77

2 1,21 99,44 0,56

1,75 0,20 99,65 0,35

1,45 0,18 99,82 0,18

1,2 0,15 99,97 0,03

1 0,02 99,99 0,01

0,87 0,01 99,99 0,01

0,73 <0,01 100,00 <0,01

0,62 - 100,00 <0,01

0,52 - 100,00 <0,01

0 <0,01 100,00 -

Report 027/17


Table 74 – Smithsonite size distribution (maximum diameter) in the sample MS_01/159.


63 - - 100,00

53 1,38 1,38 98,62

45 - 1,38 98,62

38 - 1,38 98,62

32 - 1,38 98,62

27 0,27 1,65 98,35

22 0,39 2,04 97,96

19 0,41 2,45 97,55

16 1,75 4,20 95,80

13,5 2,09 6,29 93,71

11,4 1,94 8,23 91,77

9,6 1,94 10,17 89,83

8,1 3,92 14,09 85,91

6,8 4,30 18,39 81,61

5,7 7,09 25,49 74,51

4,8 9,66 35,14 64,86

4,1 13,32 48,47 51,53

3,4 14,50 62,97 37,03

2,9 13,57 76,54 23,46

2,4 12,67 89,21 10,79

2 6,83 96,04 3,96

1,75 1,74 97,78 2,22

1,45 0,76 98,54 1,46

1,2 0,89 99,43 0,57

1 0,30 99,73 0,27

0,87 0,18 99,90 0,10

0,73 0,02 99,92 0,08

0,62 0,04 99,96 0,04

0,52 0,02 99,98 0,02

0 0,02 100,00 -

Report 027/17


Figure 20 – Particle size distribution of the heavy minerals in the subsample (SPL mode scan) MS_01/159.

Report 027/17


Cassiterite distribution and liberation

Table 75 – Cassiterite distribution by grain size classes, in the sample MS_01/159.

Cassiterite distribution by grain size classes *

<7 m 7-15 m 15-30 m 30-63 m >63 m

Cassiterite (% of the mineral) 14,99 15,83 15,02 39,97 14,20


… of the particles 5,74 13,18 27,24 57,65 107,89

… of the cassiterite 6,40 12,97 22,76 49,29 16,54

* Size of the particles where the cassiterite is contained (includes liberated cassiterite).

The modal mineralogy of the sample MS_01/159 has shown that the cassiterite represents 2,25% of its


- 14,20% of the cassiterite is included in particles with dimensions higher than 63 m;

- 39,97% of the cassiterite is included in particles with dimensions between 30 m and 63 m;



- 14,99% of the cassiterite is included in particles with dimensions smaller than 7 m.

Report 027/17


Table 76 – Cassiterite distribution by liberation classes, in the sample MS_01/159.

Cassiterite liberation by classes (cassiterite content)

0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Cassiterite 24,56 2,07 10,40 1,08 61,88

Mineral species, or groups, associated to cassiterite (Wt. %)

Galena 0,02 - - - -

Chalcopyrite - - - - -

Pyrite 0,14 - - - -



Quartz 41,43 55,19 31,59 1,18 0,62


Other silicates 0,02 0,16 - 0,90 -

Carbonates 2,52 2,58 2,53 3,10 0,09

Others 40,37 0,29 0,24 9,26 0,01

The modal mineralogy of the sample MS_01/159 has shown that the cassiterite represents 2,25% of its


- 61,88% of the cassiterite is liberated (all the particles with more than 90% of cassiterite);

- 1,08% of the cassiterite is included in rich particles (particles where the cassiterite represents


- 10,40% of the cassiterite is included in medium grade particles (particles where the cassiterite


- 2,07% of the cassiterite is included in low grade particles (particles where the cassiterite represents


- 24,56% of the cassiterite is included in very low grade particles (particles where the cassiterite


Report 027/17


Table 77 – Combined distribution of the cassiterite (size classes Vs liberation classes) in the sample MS_01/159.



0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 0,03 0,06 0,20 0,39 14,31

7-15 m 0,50 0,24 0,67 0,69 13,72

15-30 m 1,61 0,40 - - 13,00

30-63 m 8,22 1,37 9,52 - 20,85

>63 m 14,20 - - - -

Figure 21 – Combined distribution of the cassiterite (size classes Vs liberation classes) in the sample MS_01/159.

As we can see in the Figure 21, most of the cassiterite is liberated. The unliberated mineral (about

40%) is present in coarse particles (>63mm).

Report 027/17


Cassiterite distribution and liberation images (by size classes, sorted by decreasing liberation)

<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17


MASSIVE SULFIDES

Sample MS_01/169

Modal mineralogy





Galena 2,96 2,00 4706

Pyrite 78,62 78,32 27633


Enargite 0,08 0,09 98

Arsenopyrite 10,92 8,98 8256



Clausthalite 0

Tiemannite 0

Acanthite 0

Naumannite 0

Amalgam (AuAgHg) 0

Luanheite 0

Quartz 2,12 4,04 1736


Dolomite 0,01 0,02 7

Chlorites 0,21 0,32 269




Rutile 0


Goethite <0,01 0,01 5


Vanadinite 0

Schultenite 0

Sulphur 0

Alunite + clay <0,01 <0,01 11

Others 0,16 0,10 67

TOTAL 100,00 100,00 47855

Report 027/17





Sphalerite 0,46 2,85 99,90


Galena 100,00 0,86

Pyrite 89,20 90,75

Tetrahedrite <0,01 1,91 <0,01 <0,01 0,48 0,02

Enargite 0,36 28,56 0,06

Arsenopyrite 99,64 9,74 5,34 99,52


Kesterite 1,08 <0,01 <0,01 0,52 0,05

Clausthalite

Tiemannite

Acanthite

Naumannite

Amalgam (AuAgHg)

Luanheite

Quartz

Smithsonite <0,01 0,04

Dolomite

Chlorites 0,08

Phyllosilicates


Titanite <0,01

Rutile

Cassiterite 99,48

Goethite 0,01

Phosphates

Vanadinite

Schultenite

Sulphur

Alunite + clay <0,01

Others 0,39

TOTAL 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00


- chalcopyrite is the main copper mineral, representing 42,61% of this metal in the sample. Chalcocite

and enargite are the other important copper minerals in the sample;

- galena is the only lead mineral in the sample;

- the zinc is mostly distributed by the sphalerite (99,90%), only 0,10% in carbonates (smithsonite) and

kesterite.

Report 027/17





125 - - 100,00

106 2,18 2,18 97,82

90 1,54 3,72 96,28

75 3,78 7,50 92,50

63 4,39 11,89 88,11

53 4,49 16,38 83,62

45 4,78 21,16 78,84

38 5,35 26,51 73,49

32 4,00 30,51 69,49

27 4,65 35,16 64,84

22 5,85 41,01 58,99

19 4,38 45,39 54,61

16 5,06 50,45 49,55

13,5 5,09 55,54 44,46

11,4 5,64 61,18 38,82

9,6 6,52 67,70 32,30

8,1 6,96 74,67 25,33

6,8 7,07 81,74 18,26

5,7 5,95 87,68 12,32

4,8 4,21 91,89 8,11

4,1 2,78 94,67 5,33

3,4 2,07 96,74 3,26

2,9 1,12 97,86 2,14

2,4 1,01 98,87 1,13

2 0,48 99,35 0,65

1,75 0,24 99,59 0,41

1,45 0,14 99,73 0,27

1,2 0,13 99,86 0,14

1 0,07 99,93 0,07

0,87 <0,01 99,94 0,06

0,73 0,05 99,99 0,01

0,62 - 99,99 0,01

0,52 0,01 99,99 0,01

0 - 100,00 -

Report 027/17


Table 81 – Sphalerite grain size distribution (maximum diameter) in the sample MS_01/169.


53 - - 100,00

45 0,56 0,56 99,44

38 4,78 5,33 94,67

32 0,83 6,17 93,83

27 0,63 6,80 93,20

22 1,71 8,51 91,49

19 2,08 10,59 89,41

16 2,54 13,13 86,87

13,5 3,71 16,85 83,15

11,4 4,81 21,65 78,35

9,6 11,43 33,09 66,91

8,1 14,00 47,09 52,91

6,8 14,71 61,80 38,20

5,7 13,16 74,96 25,04

4,8 8,61 83,57 16,43

4,1 5,14 88,70 11,30

3,4 3,55 92,25 7,75

2,9 2,75 95,00 5,00

2,4 2,37 97,38 2,62

2 1,29 98,66 1,34

1,75 0,39 99,06 0,94

1,45 0,32 99,38 0,62

1,2 0,40 99,78 0,22

1 0,13 99,91 0,09

0,87 0,05 99,96 0,04

0,73 0,01 99,97 0,03

0,62 0,01 99,98 0,02

0,52 0,01 99,99 0,01

0 - 100,00 -

Report 027/17




45 - - 100,00

38 3,10 3,10 96,90

32 - 3,10 96,90

27 - 3,10 96,90

22 3,07 6,16 93,84

19 0,66 6,82 93,18

16 0,40 7,22 92,78

13,5 2,66 9,88 90,12

11,4 2,78 12,65 87,35

9,6 6,02 18,67 81,33

8,1 9,44 28,11 71,89

6,8 11,64 39,75 60,25

5,7 14,73 54,48 45,52

4,8 10,70 65,18 34,82

4,1 6,81 71,99 28,01

3,4 5,59 77,58 22,42

2,9 3,59 81,17 18,83

2,4 3,30 84,47 15,53

2 3,20 87,68 12,32

1,75 1,87 89,55 10,45

1,45 1,80 91,35 8,65

1,2 3,47 94,82 5,18

1 2,40 97,22 2,78

0,87 1,94 99,16 0,84

0,73 0,24 99,40 0,60

0,62 0,55 99,94 0,06

0,52 0,03 99,97 0,03

0 - 100,00 -

Report 027/17


Table 83 – Cassiterite size distribution (maximum diameter) in the sample MS_01/169.


27 - - 100,00

22 9,00 9,00 91,00

19 - 9,00 91,00

16 9,64 18,64 81,36

13,5 7,28 25,91 74,09

11,4 6,61 32,52 67,48

9,6 8,98 41,51 58,49

8,1 18,97 60,48 39,52

6,8 9,62 70,10 29,90

5,7 11,09 81,19 18,81

4,8 5,36 86,56 13,44

4,1 3,10 89,66 10,34

3,4 2,73 92,39 7,61

2,9 2,67 95,06 4,94

2,4 2,71 97,78 2,22

2 1,38 99,16 0,84

1,75 0,64 99,80 0,20

1,45 0,14 99,94 0,06

1,2 0,03 99,96 0,04

1 - 99,96 0,04

0,87 - 99,96 0,04

0,73 0,01 99,98 0,02

0,62 - 99,98 0,02

0,52 0,02 99,99 0,01

0 - 100,00 -

Report 027/17


Figure 22 – Size distribution of the main copper minerals in the sample MS_01/169.

Report 027/17



Table 84 – Sphalerite distribution by grain size classes, in the sample MS_01/169.


<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 6,30 12,58 26,02 53,91 103,93



The modal mineralogy of the sample MS_01/169 has shown that the sphalerite represents 3,99% of its







Report 027/17


Table 85 – Sphalerite distribution by liberation classes, in the sample MS_01/169.


0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Sphalerite 13,38 5,96 7,58 12,76 60,32


Galena 1,98 1,43 1,44 1,72 0,12

Chalcopyrite 0,11 0,50 1,00 0,57 0,13

Pyrite 84,88 47,94 22,94 9,24 0,85

Arsenopyrite 8,96 12,39 12,66 4,68 0,22

Other sulfides 0,22 0,16 - 0,04 0,01

Cassiterite 0,25 0,34 - 0,05 0,01

Quartz 1,07 1,48 0,31 1,01 0,02

Phyllosilicates 0,03 - - - 0,01


Carbonates - - - - -

Others 0,04 - - - -












Report 027/17


Table 86 – Combined distribution of the sphalerite (size classes Vs liberation classes) in the sample MS_01/169.



0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 0,57 0,73 1,32 3,13 27,95

7-15 m 3,32 2,52 4,07 7,20 28,19

15-30 m 2,48 1,72 0,45 0,99 3,34

30-63 m 3,66 0,97 1,74 1,43 0,83

>63 m 3,36 - - - -

Figure 23 – Combined distribution of the sphalerite (size classes Vs liberation classes) in the sample MS_01/169.

As we can see in the Figure 23, most of the sphalerite is liberated. The unliberated mineral is,

predominantly, distributed by the different liberation classes of the 7-15 m fraction, mostly as binary

particles with pyrite.

Report 027/17



<7 m

Report 027/17


7-15 m

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15-30 m

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30-63 m

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>63 m

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Table 87 – Galena distribution by grain size classes, in the sample MS_01/169.


<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 6,30 12,58 26,02 53,91 103,93

… of the galena 6,24 9,99 23,06 39,84 13,94


The modal mineralogy of the sample MS_01/169 has shown that the galena represents 2,96% of its







Report 027/17


Table 88 – Galena distribution by liberation classes, in the sample MS_01/169.


0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Galena 25,95 7,89 3,61 3,56 58,99


Sphalerite 1,87 1,60 2,57 0,01 0,07

Chalcopyrite 0,10 0,26 0,06 - <0,01

Pyrite 87,56 55,89 22,95 11,70 0,51

Arsenopyrite 7,60 5,67 6,71 3,24 0,10

Other sulfides 0,15 - - -

Cassiterite 0,07 - - - -

Quartz 0,72 0,38 2,44 0,52 0,06

Phyllosilicates 0,04 - - - -

Other silicates <0,01 - - - -


Others 0,07 - - - -





and 90%);




25 and 50%);


less than 25%).

Report 027/17


Table 89 – Combined distribution of the galena (size classes Vs liberation classes) in the sample MS_01/169.



0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 2,09 1,15 0,87 1,01 36,67

7-15 m 5,12 1,43 1,63 2,08 20,99

15-30 m 5,18 1,36 1,10 0,47 1,34

30-63 m 7,47 3,95 - - -

>63 m 6,09 - - - -

Figure 24 – Combined distribution of the Galena (size classes Vs liberation classes) in the sample MS_01/169.


in low grade particles, which are mostly coarser.

Report 027/17



<7 m

Report 027/17


7-15 m

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15-30 m

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30-63 m

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>63 m

Report 027/17


Sample MS_01/227

Modal mineralogy





Galena 9,83 6,63 5520

Pyrite 78,53 78,19 16353


Enargite 0,06 0,06 35


Chalcocite 0


Clausthalite 0

Tiemannite 0

Acanthite 0

Naumannite 0

Amalgam (AuAgHg) 0

Luanheite 0

Quartz 0,60 1,15 221



Chlorites 0,22 0,34 202



Titanite 0

Rutile 0


Goethite 0,01 0,02 4

Phosphates 0

Vanadinite 0

Schultenite 0

Sulphur 0

Alunite + clay <0,01 <0,01 2

Others 0,23 0,14 25

TOTAL 100,00 100,00 26302

Report 027/17





Sphalerite 0,73 4,21 99,82


Galena 100,00 2,88

Pyrite 96,64 91,78

Tetrahedrite 0,04 18,07 <0,01 0,04 19,70 0,12

Enargite 1,55 22,82 0,04

Arsenopyrite 98,41 1,76 0,90 80,30

Chalcocite

Kesterite 1,08 <0,01 <0,01 0,97 0,03

Clausthalite

Tiemannite

Acanthite

Naumannite

Amalgam (AuAgHg)

Luanheite

Quartz


Dolomite

Chlorites 0,07

Phyllosilicates


Titanite

Rutile

Cassiterite 99,03

Goethite 0,02

Phosphates

Vanadinite

Schultenite

Sulphur


Others 0,60

TOTAL 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00


- chalcopyrite is the main copper mineral, representing 58,04% of this metal in the sample.

Tetrahedrite and enargite are the other important copper minerals in the sample;



kesterite/tetrahedrite.

Report 027/17





212 - - 100,00

180 1,84 1,84 98,16

150 - 1,84 98,16

125 1,46 3,30 96,70

106 - 3,30 96,70

90 2,14 5,44 94,56

75 2,66 8,10 91,90

63 3,15 11,25 88,75

53 4,81 16,06 83,94

45 2,98 19,04 80,96

38 4,66 23,69 76,31

32 3,81 27,50 72,50

27 4,29 31,79 68,21

22 5,16 36,95 63,05

19 3,63 40,58 59,42

16 4,53 45,11 54,89

13,5 4,75 49,86 50,14

11,4 5,18 55,04 44,96

9,6 5,63 60,67 39,33

8,1 6,97 67,65 32,35

6,8 7,69 75,34 24,66

5,7 7,70 83,03 16,97

4,8 6,24 89,27 10,73

4,1 4,08 93,35 6,65

3,4 3,08 96,43 3,57

2,9 1,38 97,81 2,19

2,4 1,18 98,99 1,01

2 0,56 99,56 0,44

1,75 0,21 99,77 0,23

1,45 0,09 99,86 0,14

1,2 0,07 99,93 0,07

1 0,03 99,96 0,04

0,87 <0,01 99,96 0,04

0,73 0,03 99,99 0,01

0,62 - 99,99 0,01

0,52 <0,01 100,00 <0,01

0 - 100,00 -

Report 027/17




63 - - 100,00

53 0,74 0,74 99,26

45 2,46 3,20 96,80

38 - 3,20 96,80

32 - 3,20 96,80

27 2,95 6,15 93,85

22 1,36 7,52 92,48

19 3,34 10,86 89,14

16 4,15 15,00 85,00

13,5 4,81 19,81 80,19

11,4 4,65 24,46 75,54

9,6 8,60 33,06 66,94

8,1 10,93 43,99 56,01

6,8 13,73 57,73 42,27

5,7 13,64 71,37 28,63

4,8 10,68 82,05 17,95

4,1 6,66 88,71 11,29

3,4 4,89 93,60 6,40

2,9 2,78 96,38 3,62

2,4 2,11 98,49 1,51

2 0,87 99,37 0,63

1,75 0,25 99,62 0,38

1,45 0,15 99,76 0,24

1,2 0,15 99,92 0,08

1 0,05 99,96 0,04

0,87 0,02 99,98 0,02

0,73 <0,01 99,99 0,01

0,62 0,01 99,99 0,01

0,52 <0,01 99,99 0,01

0 0,01 100,00 -

Report 027/17




45 - - 100,00

38 1,06 1,06 98,94

32 0,59 1,65 98,35

27 - 1,65 98,35

22 0,33 1,98 98,02

19 1,49 3,47 96,53

16 2,20 5,67 94,33

13,5 4,35 10,02 89,98

11,4 4,41 14,43 85,57

9,6 4,56 18,99 81,01

8,1 7,70 26,69 73,31

6,8 11,17 37,86 62,14

5,7 12,97 50,83 49,17

4,8 12,34 63,18 36,82

4,1 9,05 72,22 27,78

3,4 7,57 79,79 20,21

2,9 4,37 84,17 15,83

2,4 4,30 88,47 11,53

2 3,39 91,86 8,14

1,75 1,55 93,41 6,59

1,45 1,32 94,73 5,27

1,2 2,50 97,23 2,77

1 1,52 98,76 1,24

0,87 0,96 99,72 0,28

0,73 0,09 99,81 0,19

0,62 0,16 99,97 0,03

0,52 0,01 99,99 0,01

0 - 100,00 -

Report 027/17




13,5 - - 100,00

11,4 12,39 12,39 87,61

9,6 - 12,39 87,61

8,1 4,53 16,92 83,08

6,8 15,60 32,52 67,48

5,7 31,51 64,03 35,97

4,8 15,04 79,07 20,93

4,1 8,73 87,80 12,20

3,4 6,24 94,03 5,97

2,9 2,13 96,17 3,83

2,4 2,60 98,76 1,24

2 0,95 99,71 0,29

1,75 - 99,71 0,29

1,45 - 99,71 0,29

1,2 0,29 100,00 -

1 - 100,00 -


Report 027/17





<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 6,25 12,51 26,43 55,72 142,94










Report 027/17




0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Sphalerite 14,81 9,77 4,52 6,30 64,60


Galena 6,69 6,07 7,97 4,95 0,43

Chalcopyrite 0,03 0,33 1,12 0,39 0,04

Pyrite 85,73 55,61 29,54 11,04 0,31

Arsenopyrite 3,45 1,19 0,25 0,28 0,03

Other sulfides 0,07 0,32 - - 0,01

Cassiterite 0,03 - - 0,13 -

Quartz 0,01 0,15 - 0,17 0,01

Phyllosilicates - - - - -



Others 0,08 - - - -












Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 0,49 0,80 1,57 2,29 33,76

7-15 m 2,12 2,05 2,31 3,46 25,11

15-30 m 2,97 2,27 0,64 0,55 5,74

30-63 m 6,08 4,65 - - -

>63 m 3,15 - - - -


As we can see in the Figure 26, most of the sphalerite is liberated. The unliberated mineral is

predominantly distributed by the coarser fractions.

Report 027/17



<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17





<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 6,25 12,51 26,43 55,72 142,94

… of the galena 6,04 9,95 14,88 16,37 21,59









Report 027/17




0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Galena 23,99 7,24 5,51 4,62 58,63


Sphalerite 3,57 3,86 4,21 2,48 0,08

Chalcopyrite 0,09 0,16 0,27 0,23 <0,01

Pyrite 88,42 61,19 32,28 13,63 0,43

Arsenopyrite 2,42 0,75 0,95 0,56 <0,01

Other sulfides 0,07 0,42 - - -

Cassiterite 0,02 0,24 0,38 - -

Quartz 0,14 - 0,01 - -




Others 0,13 0,41 - - -





and 90%);




25 and 50%);


less than 25%).

Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 1,71 0,92 1,23 1,38 41,85

7-15 m 4,04 2,51 2,55 2,34 15,79

15-30 m 5,28 2,35 1,73 0,90 0,99

30-63 m 7,19 1,45 - - -

>63 m 5,77 - - - -




Report 027/17



<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17


Sample MS_01/238

Modal mineralogy



Sphalerite 22,65 27,32 13212


Galena 11,29 7,36 7886

Pyrite 63,00 60,69 16938


Enargite 0,08 0,09 71


Chalcocite 0


Clausthalite 0

Tiemannite 0

Acanthite 0

Naumannite 0

Amalgam (AuAgHg) 0

Luanheite 0

Quartz 1,01 1,86 153



Chlorites 0,37 0,55 300




Rutile 0



Phosphates 0

Vanadinite 0

Schultenite 0

Sulphur 0

Alunite + clay <0,01 0,01 10

Others 0,02 0,01 6

TOTAL 100,00 100,00 39602

Report 027/17





Sphalerite 1,01 18,24 99,93


Galena 100,00 3,50

Pyrite 97,88 77,98

Tetrahedrite 0,98 29,32 0,01 0,06 90,98 0,05

Enargite 34,71 30,86 0,06

Arsenopyrite 64,30 0,09 0,04 9,02

Chalcocite

Kesterite 1,07 <0,01 <0,01 0,59 0,01

Clausthalite

Tiemannite

Acanthite

Naumannite

Amalgam (AuAgHg)

Luanheite

Quartz


Dolomite

Chlorites 0,18

Phyllosilicates


Titanite <0,01

Rutile

Cassiterite 99,41

Goethite 0,56

Phosphates

Vanadinite

Schultenite

Sulphur


Others 0,08

TOTAL 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00


- chalcopyrite is the main copper mineral, representing 38,75% of this metal in the sample. The

remaining copper is evenly distributed by the tetrahedrite and the enargite;


- the zinc is mostly distributed by the sphalerite (99,93%), only 0,07% in the tetrahedrite, carbonates

(smithsonite) and kesterite.

Report 027/17





150 - - 100,00

125 0,53 0,53 99,47

106 1,97 2,50 97,50

90 3,85 6,35 93,65

75 4,31 10,66 89,34

63 4,06 14,72 85,28

53 4,84 19,57 80,43

45 4,74 24,31 75,69

38 4,75 29,06 70,94

32 3,08 32,14 67,86

27 3,66 35,80 64,20

22 4,15 39,94 60,06

19 3,86 43,80 56,20

16 4,54 48,34 51,66

13,5 4,09 52,44 47,56

11,4 5,27 57,70 42,30

9,6 6,60 64,30 35,70

8,1 7,54 71,84 28,16

6,8 7,83 79,67 20,33

5,7 7,13 86,80 13,20

4,8 4,85 91,64 8,36

4,1 3,13 94,77 5,23

3,4 2,17 96,94 3,06

2,9 1,10 98,05 1,95

2,4 0,99 99,04 0,96

2 0,45 99,49 0,51

1,75 0,19 99,68 0,32

1,45 0,10 99,78 0,22

1,2 0,10 99,89 0,11

1 0,06 99,95 0,05

0,87 0,00 99,95 0,05

0,73 0,04 99,99 0,01

0,62 - 99,99 0,01

0,52 0,01 99,99 0,01

0 - 100,00 -

Report 027/17




106 - - 100,00

90 0,93 0,93 99,07

75 2,19 3,11 96,89

63 0,76 3,87 96,13

53 1,94 5,81 94,19

45 1,31 7,13 92,87

38 2,47 9,60 90,40

32 2,98 12,58 87,42

27 2,92 15,50 84,50

22 3,88 19,38 80,62

19 3,46 22,84 77,16

16 4,75 27,59 72,41

13,5 4,35 31,93 68,07

11,4 6,32 38,26 61,74

9,6 8,81 47,07 52,93

8,1 10,79 57,86 42,14

6,8 11,05 68,91 31,09

5,7 10,21 79,12 20,88

4,8 7,33 86,45 13,55

4,1 4,64 91,09 8,91

3,4 3,31 94,39 5,61

2,9 2,16 96,55 3,45

2,4 1,83 98,38 1,62

2 0,78 99,16 0,84

1,75 0,28 99,44 0,56

1,45 0,19 99,63 0,37

1,2 0,23 99,86 0,14

1 0,08 99,94 0,06

0,87 0,04 99,97 0,03

0,73 0,01 99,98 0,02

0,62 0,01 99,99 0,01

0,52 <0,01 99,99 0,01

0 0,01 100,00 -

Report 027/17




53 - - 100,00

45 1,33 1,33 98,67

38 0,80 2,13 97,87

32 0,99 3,13 96,87

27 1,53 4,65 95,35

22 2,65 7,30 92,70

19 1,31 8,60 91,40

16 3,12 11,73 88,27

13,5 2,66 14,39 85,61

11,4 4,72 19,11 80,89

9,6 7,15 26,25 73,75

8,1 10,03 36,29 63,71

6,8 12,76 49,05 50,95

5,7 13,55 62,59 37,41

4,8 10,58 73,17 26,83

4,1 6,44 79,61 20,39

3,4 5,00 84,60 15,40

2,9 3,11 87,71 12,29

2,4 2,77 90,48 9,52

2 2,27 92,75 7,25

1,75 1,32 94,08 5,92

1,45 1,21 95,29 4,71

1,2 2,21 97,50 2,50

1 1,34 98,84 1,16

0,87 0,88 99,72 0,28

0,73 0,09 99,81 0,19

0,62 0,16 99,96 0,04

0,52 0,01 99,98 0,02

0 0,02 100,00 -

Report 027/17




22 - - 100,00

19 24,97 24,97 75,03

16 24,97 75,03

13,5 24,97 75,03

11,4 4,26 29,23 70,77

9,6 2,94 32,17 67,83

8,1 10,60 42,76 57,24

6,8 14,80 57,56 42,44

5,7 16,52 74,08 25,92

4,8 4,97 79,05 20,95

4,1 7,59 86,65 13,35

3,4 3,88 90,53 9,47

2,9 3,53 94,06 5,94

2,4 3,96 98,02 1,98

2 1,49 99,51 0,49

1,75 0,28 99,79 0,21

1,45 0,08 99,87 0,13

1,2 0,10 99,97 0,03

1 0,03 100,00 -

0,87 - 100,00 -


Report 027/17





<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 6,34 12,24 26,25 55,43 104,16



The modal mineralogy of the sample MS_01/238 has shown that the sphalerite represents 22,65% of

its weight. The study of its distribution by size classes allows to say that:






Report 027/17




0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Sphalerite 11,04 9,33 11,03 9,23 59,36


Galena 10,13 7,43 4,77 4,07 0,53

Chalcopyrite 0,10 0,11 0,17 0,19 0,04

Pyrite 81,01 56,46 32,47 12,51 0,62

Arsenopyrite 0,04 0,05 - - -

Other sulfides 0,15 0,06 <0,01 0,08 0,01

Cassiterite 0,18 0,19 0,42 0,03 0,02

Quartz 1,60 0,04 0,02 <0,01 <0,01

Phyllosilicates 0,10 0,05 0,01 - <0,01

Other silicates 0,02 0,03 0,02 0,01 -


Others - 0,03 - - -


its weight. The study of its distribution by liberation classes allows to say that:










Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 0,37 0,57 0,80 1,23 25,05

7-15 m 1,83 1,70 2,81 4,66 24,84

15-30 m 1,96 2,05 2,30 2,07 6,65

30-63 m 3,36 2,90 2,59 1,27 1,44

>63 m 3,53 2,12 2,55 - 1,38



predominantly, distributed by the different coarser fractions.

Report 027/17



<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17





<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 6,34 12,24 26,25 55,43 104,16

… of the galena 6,34 10,18 19,55 30,14 23,84









Report 027/17




0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Galena 24,46 6,63 8,39 6,72 53,80


Sphalerite 17,94 14,60 9,65 6,80 0,38

Chalcopyrite 0,06 0,52 0,04 0,05 0,01

Pyrite 75,95 49,14 28,56 9,47 0,68

Arsenopyrite 0,05 - - - <0,01

Other sulfides 0,10 0,05 0,24 0,05 <0,01

Cassiterite 0,16 0,08 0,04 0,06 0,01

Quartz 0,15 - - - <0,01

Phyllosilicates 0,02 <0,01 - - -

Other silicates 0,01 - - 0,06 -


Others 0,03 - - - <0,01





and 90%);




25 and 50%);


less than 25%).

Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 1,15 0,66 1,06 1,34 32,33

7-15 m 3,68 2,57 2,78 4,11 19,68

15-30 m 3,63 2,21 2,40 1,28 1,79

30-63 m 6,94 1,19 2,14 - -

>63 m 9,06 - - - -




Report 027/17



<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17


Sample MS_02/171

Modal mineralogy





Galena 4,26 2,89 7741

Pyrite 84,46 84,57 24447


Enargite 0,01 0,01 20


Chalcocite <0,01 <0,01 4

Kesterite <0,01 0,01 23

Clausthalite 0

Tiemannite 0

Acanthite 0

Naumannite 0

Amalgam (AuAgHg) 0

Luanheite 0

Quartz 0,57 1,09 413



Chlorites 0,40 0,62 382



Titanite <0,01 0,01 3

Rutile 0,09 0,11 4



Phosphates 0

Vanadinite 0

Schultenite 0

Sulphur 0


Others 0,05 0,03 16

TOTAL 100,00 100,00 42288

Report 027/17





Sphalerite 0,41 2,48 99,77


Galena 100,00 1,18

Pyrite 94,37 93,62

Tetrahedrite <0,01 6,92 <0,01 0,01 2,11 0,05

Enargite 0,08 4,86 0,01

Arsenopyrite 99,92 4,77 2,55 97,89

Chalcocite 3,75 <0,01

Kesterite 1,32 <0,01 <0,01 0,95 0,04

Clausthalite

Tiemannite

Acanthite

Naumannite

Amalgam (AuAgHg)

Luanheite

Quartz


Dolomite

Chlorites 0,13

Phyllosilicates


Titanite <0,01

Rutile

Cassiterite 99,05

Goethite 0,01

Phosphates

Vanadinite

Schultenite

Sulphur


Others 0,13

TOTAL 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00


- chalcopyrite is the main copper mineral, representing 83,15% of this metal in the sample. Chalcocite,

tetrahedrite and enargite are the other important copper minerals in the sample;



kesterite.

Report 027/17





180 - - 100,00

150 0,81 0,81 99,19

125 1,26 2,08 97,92

106 2,98 5,06 94,94

90 2,96 8,02 91,98

75 5,15 13,17 86,83

63 5,39 18,55 81,45

53 4,21 22,76 77,24

45 4,60 27,36 72,64

38 4,70 32,06 67,94

32 4,87 36,93 63,07

27 4,73 41,66 58,34

22 6,54 48,20 51,80

19 5,57 53,77 46,23

16 6,65 60,42 39,58

13,5 6,55 66,97 33,03

11,4 6,53 73,51 26,49

9,6 6,30 79,81 20,19

8,1 5,61 85,41 14,59

6,8 4,43 89,84 10,16

5,7 3,24 93,08 6,92

4,8 2,24 95,32 4,68

4,1 1,45 96,78 3,22

3,4 1,09 97,86 2,14

2,9 0,63 98,49 1,51

2,4 0,63 99,12 0,88

2 0,31 99,43 0,57

1,75 0,17 99,61 0,39

1,45 0,12 99,73 0,27

1,2 0,12 99,84 0,16

1 0,07 99,92 0,08

0,87 <0,01 99,92 0,08

0,73 0,06 99,99 0,01

0,62 - 99,99 0,01

0,52 0,01 100,00 <0,01

0 <0,01 100,00 -

Report 027/17




53 - - 100,00

45 1,37 1,37 98,63

38 1,07 2,44 97,56

32 1,28 3,72 96,28

27 0,79 4,51 95,49

22 3,99 8,50 91,50

19 2,93 11,43 88,57

16 5,71 17,14 82,86

13,5 6,78 23,92 76,08

11,4 9,81 33,73 66,27

9,6 11,47 45,20 54,80

8,1 12,08 57,27 42,73

6,8 9,51 66,78 33,22

5,7 8,44 75,22 24,78

4,8 6,72 81,94 18,06

4,1 4,71 86,66 13,34

3,4 3,54 90,20 9,80

2,9 3,41 93,61 6,39

2,4 3,20 96,81 3,19

2 1,49 98,30 1,70

1,75 0,55 98,85 1,15

1,45 0,39 99,24 0,76

1,2 0,51 99,75 0,25

1 0,14 99,89 0,11

0,87 0,07 99,97 0,03

0,73 0,01 99,97 0,03

0,62 0,01 99,98 0,02

0,52 0,01 99,99 0,01

0 0,01 100,00 -

Report 027/17




63 - - 100,00

53 0,18 0,18 99,82

45 0,42 0,60 99,40

38 1,39 1,99 98,01

32 0,72 2,71 97,29

27 1,17 3,88 96,12

22 4,04 7,92 92,08

19 1,59 9,51 90,49

16 1,97 11,48 88,52

13,5 2,58 14,06 85,94

11,4 3,88 17,94 82,06

9,6 8,03 25,97 74,03

8,1 10,33 36,30 63,70

6,8 8,26 44,56 55,44

5,7 8,72 53,28 46,72

4,8 6,65 59,93 40,07

4,1 5,14 65,08 34,92

3,4 4,33 69,40 30,60

2,9 3,99 73,40 26,60

2,4 4,03 77,43 22,57

2 4,30 81,73 18,27

1,75 2,69 84,42 15,58

1,45 2,34 86,76 13,24

1,2 5,19 91,95 8,05

1 3,87 95,82 4,18

0,87 3,08 98,90 1,10

0,73 0,34 99,24 0,76

0,62 0,70 99,94 0,06

0,52 0,03 99,97 0,03

0 0,03 100,00 -

Report 027/17




16 - - 100,00

13,5 12,73 12,73 87,27

11,4 - 12,73 87,27

9,6 4,40 17,12 82,88

8,1 6,67 23,80 76,20

6,8 28,64 52,44 47,56

5,7 11,28 63,72 36,28

4,8 9,11 72,83 27,17

4,1 10,64 83,47 16,53

3,4 3,64 87,11 12,89

2,9 5,42 92,53 7,47

2,4 3,65 96,18 3,82

2 2,46 98,64 1,36

1,75 0,72 99,36 0,64

1,45 0,48 99,84 0,16

1,2 0,07 99,91 0,09

1 0,08 99,99 0,01

0,87 - 99,99 0,01

0,73 - 99,99 0,01

0,62 - 99,99 0,01

0 - 100,00 -


Report 027/17





<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 6,30 13,10 25,72 53,55 114,58










Report 027/17




0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Sphalerite 26,51 6,73 9,94 11,87 44,95


Galena 2,98 2,95 3,39 1,94 0,47

Chalcopyrite 0,19 0,45 0,47 0,32 0,04

Pyrite 89,87 58,72 31,44 11,98 0,89

Arsenopyrite 4,31 2,62 2,44 2,39 0,23

Other sulfides 0,02 - 0,03 0,08 -


Quartz 0,13 0,15 0,23 0,21 -

Phyllosilicates 0,02 0,11 - 0,10 -

Other silicates <0,01 - - - 0,02

Carbonates 0,01 - - - -

Others 0,01 - - - -












Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 0,35 0,45 0,96 1,27 15,58

7-15 m 4,71 2,42 4,08 7,38 23,37

15-30 m 7,01 2,95 4,29 3,22 4,62

30-63 m 7,28 0,91 0,60 - 1,37

>63 m 7,16 - - - -


As we can see in the Figure 32, most of the sphalerite is liberated. The unliberated mineral is, mostly,

distributed by coarser fractions.

Report 027/17



<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17





<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 6,30 13,10 25,72 53,55 114,58

… of the galena 6,20 10,67 20,56 13,12 23,77









Report 027/17




0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Galena 40,30 6,52 4,44 5,17 43,57


Sphalerite 2,47 3,79 1,08 1,14 0,13

Chalcopyrite 0,15 0,25 0,09 0,07 0,04

Pyrite 89,30 52,76 32,13 10,02 0,52

Arsenopyrite 4,96 5,56 4,61 2,88 0,08

Other sulfides 0,02 0,04 - - -

Cassiterite 0,06 - 0,41 0,14 -

Quartz 0,09 0,12 - 0,51 -

Phyllosilicates 0,08 - 0,02 0,12 <0,01

Other silicates 0,02 0,09 - 0,07 -

Carbonates <0,01 - - - -

Others 0,03 - - - -





and 90%);




25 and 50%);


less than 25%).

Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 1,62 0,90 0,92 0,54 21,77

7-15 m 6,97 1,51 1,51 2,24 20,40

15-30 m 9,72 2,11 2,01 2,39 1,40

30-63 m 8,54 2,00 - - -

>63 m 13,45 - - - -


As we can see in the Figure 33, the galena presents a bimodal distribution. Half of the mineral is

liberated; the other part is present in low grade particles, but mostly in the coarser fractions.

Report 027/17



<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17


Sample MS_02/208

Modal mineralogy



Sphalerite 20,12 25,40 16664


Galena 17,18 11,72 17598

Pyrite 54,45 54,87 17227


Enargite 0,03 0,03 8



Kesterite <0,01 <0,01 30

Clausthalite 0

Tiemannite 0

Acanthite 0

Naumannite 0

Amalgam (AuAgHg) 0

Luanheite 0

Quartz 0,31 0,59 144


Dolomite 0,02 0,04 14

Chlorites 0,44 0,70 451



Titanite <0,01 <0,01 1

Rutile 0




Vanadinite 0

Schultenite 0

Sulphur 0


Others 0,08 0,05 16

TOTAL 100,00 100,00 57070

Report 027/17





Sphalerite 3,29 16,80 99,87


Galena 100,00 5,82

Pyrite 87,81 73,52

Tetrahedrite <0,01 11,93 <0,01 0,02 2,98 0,02

Enargite 0,23 17,85 0,02

Arsenopyrite 99,76 8,17 3,69 97,02


Kesterite 0,76 <0,01 <0,01 0,25 <0,01

Clausthalite

Tiemannite

Acanthite

Naumannite

Amalgam (AuAgHg)

Luanheite

Quartz


Dolomite

Chlorites 0,19

Phyllosilicates


Titanite <0,01

Rutile

Cassiterite 99,75

Goethite 0,02

Phosphates

Vanadinite

Schultenite

Sulphur

Alunite + clay 0,01

Others 0,29

TOTAL 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00





- the zinc is mostly distributed by the sphalerite (99,87%), only 0,13% in carbonates (smithsonite),

tetrahedrite and kesterite.

Report 027/17





125 - - 100,00

106 0,35 0,35 99,65

90 0,67 1,02 98,98

75 3,55 4,57 95,43

63 3,96 8,54 91,46

53 7,58 16,11 83,89

45 4,43 20,54 79,46

38 5,08 25,62 74,38

32 4,60 30,22 69,78

27 3,63 33,85 66,15

22 4,55 38,40 61,60

19 3,76 42,16 57,84

16 5,37 47,53 52,47

13,5 6,47 54,00 46,00

11,4 7,44 61,43 38,57

9,6 8,40 69,83 30,17

8,1 8,62 78,45 21,55

6,8 6,79 85,25 14,75

5,7 5,21 90,45 9,55

4,8 3,21 93,66 6,34

4,1 2,06 95,73 4,27

3,4 1,46 97,18 2,82

2,9 0,81 98,00 2,00

2,4 0,90 98,90 1,10

2 0,38 99,28 0,72

1,75 0,19 99,47 0,53

1,45 0,14 99,60 0,40

1,2 0,15 99,75 0,25

1 0,11 99,86 0,14

0,87 0,01 99,86 0,14

0,73 0,11 99,98 0,02

0,62 - 99,98 0,02

0,52 0,02 99,99 0,01

0 0,01 100,00 -

Report 027/17




106 - - 100,00

90 0,63 0,63 99,37

75 0,50 1,12 98,88

63 0,26 1,39 98,61

53 1,34 2,72 97,28

45 1,86 4,58 95,42

38 3,38 7,96 92,04

32 2,26 10,22 89,78

27 1,77 11,99 88,01

22 4,02 16,02 83,98

19 4,03 20,05 79,95

16 5,39 25,43 74,57

13,5 7,36 32,79 67,21

11,4 9,93 42,71 57,29

9,6 10,91 53,63 46,37

8,1 11,36 64,98 35,02

6,8 10,08 75,06 24,94

5,7 7,84 82,91 17,09

4,8 5,29 88,19 11,81

4,1 3,36 91,55 8,45

3,4 2,53 94,08 5,92

2,9 2,15 96,22 3,78

2,4 1,74 97,96 2,04

2 0,85 98,81 1,19

1,75 0,35 99,16 0,84

1,45 0,27 99,43 0,57

1,2 0,34 99,77 0,23

1 0,13 99,90 0,10

0,87 0,06 99,96 0,04

0,73 0,01 99,97 0,03

0,62 0,01 99,98 0,02

0,52 0,01 99,99 0,01

0 - 100,00 -

Report 027/17




63 - - 100,00

53 1,11 1,11 98,89

45 1,39 2,50 97,50

38 2,01 4,51 95,49

32 1,07 5,58 94,42

27 2,02 7,59 92,41

22 1,95 9,54 90,46

19 2,57 12,11 87,89

16 4,03 16,14 83,86

13,5 5,26 21,40 78,60

11,4 7,40 28,80 71,20

9,6 9,36 38,16 61,84

8,1 12,01 50,17 49,83

6,8 10,70 60,87 39,13

5,7 9,52 70,40 29,60

4,8 6,42 76,81 23,19

4,1 4,26 81,07 18,93

3,4 3,30 84,37 15,63

2,9 2,35 86,72 13,28

2,4 2,51 89,24 10,76

2 2,30 91,53 8,47

1,75 1,37 92,90 7,10

1,45 1,20 94,10 5,90

1,2 2,43 96,54 3,46

1 1,69 98,22 1,78

0,87 1,33 99,55 0,45

0,73 0,14 99,69 0,31

0,62 0,27 99,96 0,04

0,52 0,01 99,98 0,02

0 0,02 100,00 -

Report 027/17




19 - - 100,00

16 5,27 5,27 94,73

13,5 4,16 9,42 90,58

11,4 11,94 21,37 78,63

9,6 16,22 37,59 62,41

8,1 12,88 50,47 49,53

6,8 17,56 68,03 31,97

5,7 5,41 73,44 26,56

4,8 9,15 82,59 17,41

4,1 4,39 86,98 13,02

3,4 2,75 89,72 10,28

2,9 4,51 94,23 5,77

2,4 3,11 97,33 2,67

2 1,53 98,86 1,14

1,75 0,16 99,03 0,97

1,45 0,47 99,49 0,51

1,2 0,28 99,77 0,23

1 0,16 99,93 0,07

0,87 0,01 99,95 0,05

0,73 0,01 99,96 0,04

0,62 0,02 99,98 0,02

0,52 0,01 99,99 0,01


Report 027/17





<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 6,37 12,74 25,16 56,82 87,09




its weight. The study of its distribution by size classes allows to say that:






Report 027/17




0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Sphalerite 10,53 6,56 8,28 13,76 60,88


Galena 15,12 8,76 8,51 5,00 0,90

Chalcopyrite 0,09 0,19 0,15 0,17 0,03

Pyrite 71,63 49,60 22,94 9,07 0,60

Arsenopyrite 7,66 4,17 4,64 1,72 0,14

Other sulfides 0,11 0,02 0,07 0,01

Cassiterite 0,15 0,22 0,17 0,04 0,01

Quartz 0,02 0,06 0,02 0,01 <0,01


Other silicates 0,01 <0,01 - 0,01 <0,01

Carbonates 0,05 0,02 0,01 0,02 <0,01

Others 0,03 - 0,03 0,02 -


its weight. The study of its distribution by liberation classes allows to say that:










Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 0,27 0,35 0,64 1,18 18,49

7-15 m 2,03 1,55 2,30 5,87 32,77

15-30 m 2,02 1,21 2,04 3,58 8,27

30-63 m 4,50 1,93 2,85 3,13 1,35

>63 m 1,71 1,53 0,44 - -



distributed evenly by the other classes.

Report 027/17



<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17





<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 6,37 12,74 25,16 56,82 87,09

… of the galena 6,37 11,53 20,37 33,28 52,57









Report 027/17




0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Galena 17,98 8,92 6,80 6,48 59,83


Sphalerite 17,47 9,52 9,61 4,85 0,55

Chalcopyrite 0,12 0,08 0,21 0,04 0,01

Pyrite 69,27 50,01 25,58 9,52 0,74

Arsenopyrite 7,06 5,38 2,75 1,60 0,15

Other sulfides 0,09 0,02 0,03 <0,01 <0,01

Cassiterite 0,17 0,06 0,03 0,03 <0,01

Quartz 0,03 - 0,16 - -

Phyllosilicates 0,04 - - - <0,01

Other silicates <0,01 0,03 - - -

Carbonates 0,03 0,01 0,01 0,04 <0,01

Others 0,07 <0,01 - - <0,01





and 90%);




25 and 50%);


less than 25%).

Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 0,87 0,68 0,68 0,80 23,34

7-15 m 3,34 1,42 2,04 3,20 30,56

15-30 m 3,17 1,43 1,76 1,86 5,14

30-63 m 7,72 3,18 1,59 0,61 0,79

>63 m 2,87 2,21 0,72 - -




Report 027/17



<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17


Sample MS_02/219

Modal mineralogy



Sphalerite 8,53 10,44 7967


Galena 4,18 2,77 5583

Pyrite 81,44 79,64 23301


Enargite <0,01 <0,01 2


Chalcocite 0


Clausthalite 0

Tiemannite 0

Acanthite 0

Naumannite 0

Amalgam (AuAgHg) 0

Luanheite 0

Quartz 0,64 1,20 177



Chlorites 0,71 1,06 455




Rutile 0,01 0,02 2



Phosphates <0,01 <0,01 1

Vanadinite 0

Schultenite 0

Sulphur 0


Others 0,04 0,02 15

TOTAL 100,00 100,00 40526

Report 027/17





Sphalerite 1,02 5,92 99,81


Galena 100,00 1,18

Pyrite 95,98 91,47

Tetrahedrite 0,03 28,35 <0,01 0,04 14,54 0,09

Enargite 0,01 0,29 <0,01

Arsenopyrite 99,97 2,49 1,28 85,46

Chalcocite

Kesterite 5,15 <0,01 0,01 1,94 0,06

Clausthalite

Tiemannite

Acanthite

Naumannite

Amalgam (AuAgHg)

Luanheite

Quartz


Dolomite

Chlorites 0,23

Phyllosilicates


Titanite <0,01

Rutile

Cassiterite 98,06

Goethite 0,04

Phosphates

Vanadinite

Schultenite

Sulphur


Others 0,10

TOTAL 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00



Tetrahedrite, chalcocite and enargite are the other important copper minerals in the sample;


- the zinc is mostly distributed by the sphalerite (99,81%), only 0,19% in tetrahedrite, carbonates


Report 027/17





125 - - 100,00

106 0,66 0,66 99,34

90 1,03 1,69 98,31

75 2,35 4,04 95,96

63 1,03 5,07 94,93

53 3,64 8,70 91,30

45 3,59 12,30 87,70

38 3,25 15,55 84,45

32 4,26 19,81 80,19

27 5,83 25,64 74,36

22 8,22 33,85 66,15

19 6,79 40,64 59,36

16 8,75 49,39 50,61

13,5 8,80 58,19 41,81

11,4 9,04 67,22 32,78

9,6 8,23 75,45 24,55

8,1 7,10 82,55 17,45

6,8 5,37 87,92 12,08

5,7 3,59 91,51 8,49

4,8 2,08 93,59 6,41

4,1 1,40 94,99 5,01

3,4 1,42 96,41 3,59

2,9 0,91 97,32 2,68

2,4 1,23 98,55 1,45

2 0,51 99,07 0,93

1,75 0,27 99,34 0,66

1,45 0,20 99,55 0,45

1,2 0,22 99,76 0,24

1 0,13 99,89 0,11

0,87 0,01 99,90 0,10

0,73 0,08 99,98 0,02

0,62 - 99,98 0,02

0,52 0,01 99,99 0,01

0 0,01 100,00 -

Report 027/17




38 - - 100,00

32 1,08 1,08 98,92

27 1,29 2,37 97,63

22 2,77 5,14 94,86

19 2,97 8,11 91,89

16 6,69 14,81 85,19

13,5 8,61 23,42 76,58

11,4 10,88 34,29 65,71

9,6 13,33 47,63 52,37

8,1 11,40 59,03 40,97

6,8 9,88 68,91 31,09

5,7 7,13 76,04 23,96

4,8 5,52 81,56 18,44

4,1 3,96 85,52 14,48

3,4 3,55 89,07 10,93

2,9 3,35 92,42 7,58

2,4 3,26 95,68 4,32

2 1,78 97,47 2,53

1,75 0,77 98,24 1,76

1,45 0,63 98,87 1,13

1,2 0,76 99,63 0,37

1 0,22 99,84 0,16

0,87 0,10 99,95 0,05

0,73 0,01 99,96 0,04

0,62 0,02 99,98 0,02

0,52 0,01 99,99 0,01

0 0,01 100,00 -

Report 027/17




45 - - 100,00

38 1,02 1,02 98,98

32 1,66 2,69 97,31

27 - 2,69 97,31

22 2,58 5,27 94,73

19 3,33 8,60 91,40

16 1,70 10,30 89,70

13,5 5,42 15,72 84,28

11,4 7,86 23,58 76,42

9,6 10,13 33,71 66,29

8,1 13,05 46,76 53,24

6,8 8,39 55,15 44,85

5,7 6,53 61,68 38,32

4,8 4,31 65,99 34,01

4,1 3,67 69,67 30,33

3,4 3,56 73,23 26,77

2,9 2,93 76,16 23,84

2,4 3,98 80,13 19,87

2 3,61 83,75 16,25

1,75 2,71 86,46 13,54

1,45 2,70 89,15 10,85

1,2 5,91 95,06 4,94

1 3,12 98,18 1,82

0,87 1,41 99,59 0,41

0,73 0,13 99,73 0,27

0,62 0,20 99,93 0,07

0,52 0,03 99,96 0,04

0 0,04 100,00 -

Report 027/17




19 - - 100,00

16 19,74 19,74 80,26

13,5 5,42 25,15 74,85

11,4 4,76 29,91 70,09

9,6 12,41 42,32 57,68

8,1 12,90 55,22 44,78

6,8 11,02 66,24 33,76

5,7 8,46 74,70 25,30

4,8 8,58 83,27 16,73

4,1 4,26 87,53 12,47

3,4 1,61 89,14 10,86

2,9 4,12 93,26 6,74

2,4 4,38 97,64 2,36

2 1,15 98,79 1,21

1,75 0,59 99,38 0,62

1,45 0,34 99,72 0,28

1,2 0,18 99,90 0,10

1 0,05 99,95 0,05

0,87 - 99,95 0,05

0,73 - 99,95 0,05

0,62 0,01 99,96 0,04

0,52 0,01 99,97 0,03

0 0,03 100,00 -


Report 027/17





<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 6,30 13,21 25,40 53,58 100,57










Report 027/17




0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Sphalerite 12,12 4,50 4,42 10,28 68,67


Galena 2,45 2,47 2,84 1,34 0,24

Chalcopyrite 0,09 0,27 0,24 0,37 0,02

Pyrite 90,87 59,09 30,46 12,56 1,06

Arsenopyrite 2,49 3,63 1,39 0,71 0,10

Other sulfides 0,02 - 0,04 0,09 0,01

Cassiterite 0,12 0,46 - 0,06 <0,01

Quartz 0,30 - - 0,04 -

Phyllosilicates 0,52 - 0,26 - <0,01

Other silicates 0,28 - - 0,12 <0,01

Carbonates - 0,12 - - -

Others 0,01 0,01 - - -












Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 0,30 0,39 0,57 1,01 21,34

7-15 m 3,27 1,30 2,49 5,37 37,15

15-30 m 5,01 1,52 0,97 3,90 10,19

30-63 m 2,97 0,54 0,38 - -

>63 m 0,57 0,76 - - -



predominantly, distributed by the different liberation classes of the 7-15 m and 15-30 m fractions.

Report 027/17



<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17





<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 6,30 13,21 25,40 53,58 100,57

… of the galena 5,98 12,03 18,82 26,74 9,68









Report 027/17




0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Galena 29,11 5,47 4,91 4,17 56,34


Sphalerite 3,33 4,05 3,41 2,09 0,14

Chalcopyrite 0,10 0,26 - 0,15 0,01

Pyrite 90,60 61,76 32,26 11,95 0,68

Arsenopyrite 2,15 1,30 0,90 1,19 0,06

Other sulfides 0,05 0,01 0,09 - <0,01


Quartz 0,09 - - - <0,01


Other silicates 0,24 0,37 - - -


Others 0,06 - - - -





and 90%);




25 and 50%);


less than 25%).

Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 1,45 0,86 0,66 0,69 19,24

7-15 m 5,63 1,33 1,50 2,70 31,75

15-30 m 8,82 1,22 1,65 0,78 4,33

30-63 m 9,81 2,05 1,10 - 1,01

>63 m 3,42 - - - -




Report 027/17



<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17


Sample MS_03/177

Modal mineralogy





Galena 5,14 3,46 6255

Pyrite 87,60 87,11 26405


Enargite 0


Chalcocite 0


Clausthalite 0

Tiemannite 0

Acanthite 0

Naumannite 0

Amalgam (AuAgHg) 0

Luanheite 0

Quartz 0,69 1,31 312

Smithsonite <0,01 0,01 12


Chlorites 0,22 0,35 250




Rutile <0,01 <0,01 1


Goethite <0,01 <0,01 3

Phosphates <0,01 0,01 1

Vanadinite 0

Schultenite 0

Sulphur 0

Alunite + clay <0,01 0,01 20

Others 0,13 0,08 24

TOTAL 100,00 100,00 38413

Report 027/17





Sphalerite 0,44 2,62 99,59


Galena 100,00 1,40

Pyrite 98,15 95,39

Tetrahedrite 0,07 56,48 0,01 0,04 31,04 0,21

Enargite

Arsenopyrite 99,93 0,97 0,51 68,96

Chalcocite

Kesterite 13,06 <0,01 0,01 4,19 0,19

Clausthalite

Tiemannite

Acanthite

Naumannite

Amalgam (AuAgHg)

Luanheite

Quartz


Dolomite

Chlorites 0,07

Phyllosilicates


Titanite <0,01

Rutile

Cassiterite 95,81

Goethite <0,01

Phosphates

Vanadinite

Schultenite

Sulphur


Others 0,32

TOTAL 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00


- tetrahedrite is the main copper mineral, representing 56,48% of this metal in the sample.

Chalcopyrite and kesterite are the other important copper minerals in the sample;




Report 027/17





212 - - 100,00

180 2,11 2,11 97,89

150 1,82 3,93 96,07

125 4,41 8,34 91,66

106 3,91 12,25 87,75

90 6,05 18,29 81,71

75 6,09 24,38 75,62

63 4,99 29,37 70,63

53 5,08 34,45 65,55

45 4,58 39,04 60,96

38 3,67 42,70 57,30

32 3,38 46,08 53,92

27 2,85 48,93 51,07

22 3,82 52,75 47,25

19 2,43 55,18 44,82

16 3,01 58,19 41,81

13,5 3,50 61,69 38,31

11,4 4,27 65,96 34,04

9,6 5,15 71,11 28,89

8,1 5,86 76,97 23,03

6,8 6,42 83,39 16,61

5,7 5,64 89,03 10,97

4,8 3,95 92,98 7,02

4,1 2,52 95,50 4,50

3,4 1,90 97,40 2,60

2,9 0,88 98,28 1,72

2,4 0,79 99,07 0,93

2 0,40 99,47 0,53

1,75 0,19 99,66 0,34

1,45 0,11 99,78 0,22

1,2 0,11 99,89 0,11

1 0,06 99,95 0,05

0,87 <0,01 99,95 0,05

0,73 0,04 99,99 0,01

0,62 - 99,99 0,01

0,52 <0,01 100,00 <0,01

0 <0,01 100,00 -

Report 027/17




90 - - 100,00

75 4,58 4,58 95,42

63 - 4,58 95,42

53 - 4,58 95,42

45 - 4,58 95,42

38 0,85 5,43 94,57

32 2,96 8,40 91,60

27 2,76 11,15 88,85

22 1,37 12,53 87,47

19 1,47 13,99 86,01

16 3,01 17,01 82,99

13,5 4,90 21,91 78,09

11,4 5,04 26,95 73,05

9,6 9,35 36,30 63,70

8,1 11,87 48,17 51,83

6,8 13,32 61,49 38,51

5,7 12,59 74,08 25,92

4,8 8,76 82,84 17,16

4,1 5,55 88,39 11,61

3,4 3,93 92,32 7,68

2,9 2,99 95,31 4,69

2,4 2,52 97,82 2,18

2 1,08 98,90 1,10

1,75 0,40 99,30 0,70

1,45 0,28 99,58 0,42

1,2 0,27 99,85 0,15

1 0,08 99,94 0,06

0,87 0,04 99,97 0,03

0,73 0,01 99,98 0,02

0,62 <0,01 99,99 0,01

0,52 <0,01 99,99 0,01

0 0,01 100,00 -

Report 027/17




27 - - 100,00

22 0,37 0,37 99,63

19 1,12 1,49 98,51

16 1,24 2,73 97,27

13,5 1,63 4,36 95,64

11,4 4,02 8,38 91,62

9,6 6,93 15,31 84,69

8,1 8,34 23,65 76,35

6,8 11,61 35,26 64,74

5,7 13,27 48,52 51,48

4,8 11,16 59,68 40,32

4,1 7,51 67,19 32,81

3,4 5,72 72,91 27,09

2,9 4,36 77,27 22,73

2,4 4,13 81,40 18,60

2 3,59 84,99 15,01

1,75 2,28 87,27 12,73

1,45 2,17 89,44 10,56

1,2 4,50 93,94 6,06

1 3,22 97,15 2,85

0,87 2,15 99,30 0,70

0,73 0,25 99,55 0,45

0,62 0,41 99,96 0,04

0,52 0,02 99,97 0,03

0 0,03 100,00 -

Report 027/17




13,5 - - 100,00

11,4 8,36 8,36 91,64

9,6 16,89 25,26 74,74

8,1 4,99 30,25 69,75

6,8 17,84 48,09 51,91

5,7 20,92 69,01 30,99

4,8 9,48 78,49 21,51

4,1 5,45 83,93 16,07

3,4 6,31 90,24 9,76

2,9 3,50 93,73 6,27

2,4 4,09 97,82 2,18

2 1,24 99,06 0,94

1,75 0,23 99,29 0,71

1,45 0,52 99,81 0,19

1,2 0,11 99,92 0,08

1 0,07 99,99 0,01

0,87 - 99,99 0,01

0,73 - 99,99 0,01

0,62 - 99,99 0,01

0,52 - 99,99 0,01

0 0,01 100,00 -


Report 027/17





<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 6,32 12,36 25,79 55,88 138,98










Report 027/17




0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Sphalerite 16,84 6,65 7,57 8,26 60,68


Galena 2,64 6,32 4,20 2,88 0,45

Chalcopyrite 0,01 0,09 0,17 0,31 0,02

Pyrite 94,91 57,42 32,04 12,55 0,76

Arsenopyrite 0,56 1,92 0,42 0,44 0,61

Other sulfides 0,07 - 0,02 0,12 <0,01

Cassiterite 0,06 0,52 0,59 0,61 0,03

Quartz 0,05 <0,01 0,05 <0,01 <0,01




Others <0,01 - - - -












Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 0,47 0,75 1,32 1,76 25,35

7-15 m 2,73 2,83 3,83 4,74 26,97

15-30 m 1,93 0,43 1,82 1,76 2,69

30-63 m 3,31 2,64 0,60 - 1,09

>63 m 8,39 - - - 4,58



predominantly, distributed by the different liberation classes of the 7-15 m and >63 m fractions.

Report 027/17



<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17





<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 6,32 12,36 25,79 55,88 138,98

… of the galena 6,23 10,35 17,20 11,15 7,44









Report 027/17




0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Galena 30,53 4,92 3,86 3,88 56,81


Sphalerite 2,28 4,36 5,25 1,51 0,04

Chalcopyrite 0,01 0,09 0,15 0,32

Pyrite 93,69 55,23 31,10 15,22 0,61

Arsenopyrite 0,61 4,47 1,61 1,06 0,03

Other sulfides 0,04 0,17 0,31 - 0,01

Cassiterite 0,06 0,11 - - 0,03

Quartz 0,15 0,25 0,03 0,10 0,01




Others 0,04 - - - -





and 90%);




25 and 50%);


less than 25%).

Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 1,62 1,10 1,29 1,27 35,55

7-15 m 4,93 2,17 2,12 2,10 20,69

15-30 m 3,92 1,46 0,46 0,51 0,56

30-63 m 7,60 0,19 - - -

>63 m 12,46 - - - -




Report 027/17



<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17


Sample MS_03/179

Modal mineralogy





Galena 3,88 2,61 2784

Pyrite 86,32 85,59 15830


Enargite <0,01 0,01 2


Chalcocite 0


Clausthalite 0

Tiemannite 0

Acanthite 0

Naumannite 0

Amalgam (AuAgHg) 0

Luanheite 0

Quartz 1,16 2,20 233


Dolomite 0,06 0,10 10

Chlorites 0,40 0,61 294




Rutile <0,01 <0,01 2



Phosphates <0,01 0,01 1

Vanadinite 0

Schultenite 0

Sulphur 0

Alunite + clay <0,01 <0,01 5

Others 0,13 0,08 10

TOTAL 100,00 100,00 22263

Report 027/17





Sphalerite 0,34 2,08 99,60


Galena 100,00 1,07

Pyrite 95,79 95,07

Tetrahedrite 0,01 30,33 <0,01 0,01 3,51 0,07

Enargite 0,07 11,12 <0,01

Arsenopyrite 99,93 3,24 1,73 96,49

Chalcocite

Kesterite 12,42 <0,01 0,01 1,84 0,11

Clausthalite

Tiemannite

Acanthite

Naumannite

Amalgam (AuAgHg)

Luanheite

Quartz


Dolomite

Chlorites 0,13

Phyllosilicates


Titanite <0,01

Rutile

Cassiterite 98,16

Goethite 0,13

Phosphates

Vanadinite

Schultenite

Sulphur


Others 0,39

TOTAL 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00



Tetrahedrite, kesterite and enargite are the other important copper minerals in the sample;




Report 027/17





180 - - 100,00

150 3,25 3,25 96,75

125 - 3,25 96,75

106 4,67 7,93 92,07

90 - 7,93 92,07

75 3,78 11,70 88,30

63 4,42 16,12 83,88

53 3,48 19,60 80,40

45 3,77 23,36 76,64

38 5,52 28,88 71,12

32 4,11 32,99 67,01

27 5,83 38,82 61,18

22 5,52 44,35 55,65

19 3,46 47,81 52,19

16 4,38 52,19 47,81

13,5 4,60 56,79 43,21

11,4 4,45 61,23 38,77

9,6 4,65 65,89 34,11

8,1 5,16 71,05 28,95

6,8 5,28 76,33 23,67

5,7 5,93 82,26 17,74

4,8 5,18 87,45 12,55

4,1 3,83 91,28 8,72

3,4 3,45 94,73 5,27

2,9 1,87 96,60 3,40

2,4 1,65 98,25 1,75

2 0,86 99,11 0,89

1,75 0,34 99,45 0,55

1,45 0,19 99,64 0,36

1,2 0,18 99,82 0,18

1 0,10 99,92 0,08

0,87 0,01 99,93 0,07

0,73 0,07 99,99 0,01

0,62 - 99,99 0,01

0,52 0,01 100,00 <0,01

0 <0,01 100,00 -

Report 027/17




38 - - 100,00

32 5,01 5,01 94,99

27 - 5,01 94,99

22 4,39 9,40 90,60

19 - 9,40 90,60

16 3,82 13,23 86,77

13,5 2,45 15,68 84,32

11,4 6,64 22,32 77,68

9,6 8,25 30,57 69,43

8,1 10,67 41,24 58,76

6,8 9,46 50,69 49,31

5,7 11,04 61,73 38,27

4,8 11,09 72,82 27,18

4,1 9,74 82,57 17,43

3,4 7,21 89,78 10,22

2,9 4,60 94,38 5,62

2,4 3,49 97,87 2,13

2 1,22 99,09 0,91

1,75 0,32 99,41 0,59

1,45 0,23 99,64 0,36

1,2 0,27 99,91 0,09

1 0,06 99,96 0,04

0,87 0,02 99,98 0,02

0,73 0,01 99,99 0,01

0,62 0,01 99,99 0,01

0,52 <0,01 100,00 <0,01

0 - 100,00 -

Report 027/17




27 - - 100,00

22 0,33 0,33 99,67

19 0,65 0,97 99,03

16 1,47 2,44 97,56

13,5 0,90 3,35 96,65

11,4 3,32 6,66 93,34

9,6 5,79 12,45 87,55

8,1 6,11 18,56 81,44

6,8 6,88 25,44 74,56

5,7 11,17 36,61 63,39

4,8 9,29 45,90 54,10

4,1 9,34 55,24 44,76

3,4 7,57 62,81 37,19

2,9 5,96 68,77 31,23

2,4 7,16 75,93 24,07

2 6,18 82,11 17,89

1,75 2,69 84,81 15,19

1,45 2,86 87,66 12,34

1,2 5,91 93,57 6,43

1 3,77 97,34 2,66

0,87 2,14 99,48 0,52

0,73 0,17 99,65 0,35

0,62 0,31 99,96 0,04

0,52 0,02 99,98 0,02

0 - 100,00 -

Report 027/17




13,5 - - 100,00

11,4 10,94 10,94 89,06

9,6 - 10,94 89,06

8,1 7,11 18,05 81,95

6,8 18,69 36,74 63,26

5,7 13,44 50,18 49,82

4,8 14,98 65,16 34,84

4,1 17,83 83,00 17,00

3,4 4,04 87,04 12,96

2,9 8,57 95,61 4,39

2,4 3,03 98,64 1,36

2 0,77 99,41 0,59

1,75 0,39 99,80 0,20

1,45 0,18 99,98 0,02

1,2 - 99,98 0,02

1 - 99,98 0,02

0,87 - 99,98 0,02

0,73 - 99,98 0,02

0,62 - 99,98 0,02

0,52 10,94 10,94 89,06

0 - 100,00 -


Report 027/17





<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 6,06 12,87 26,66 52,14 150,26










Report 027/17




0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Sphalerite 13,78 4,47 4,06 4,17 73,52


Galena 2,74 4,84 4,69 3,65 0,22

Chalcopyrite 0,00 - 0,43 1,21 0,03

Pyrite 92,49 50,95 22,67 10,68 0,31

Arsenopyrite 2,45 6,97 7,83 0,20 0,03

Other sulfides 0,04 - - - 0,02

Cassiterite 0,05 0,01 - - -

Quartz 0,37 - - - -


Other silicates - - - 1,28 -


Others - - - - -












Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 0,43 0,72 1,12 1,37 42,52

7-15 m 1,72 1,05 2,37 1,70 26,44

15-30 m 2,67 1,70 0,58 1,09 4,55

30-63 m 2,46 1,00 - - -

>63 m 6,50 - - - -



predominantly distributed by the low grade particles, mostly in the coarser fractions.

Report 027/17



<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17





<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 6,06 12,87 26,66 52,14 150,26

… of the galena 5,70 10,64 14,50 7,86 6,56









Report 027/17




0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Galena 33,71 5,88 3,19 2,74 54,48


Sphalerite 1,15 4,82 0,38 1,58 0,06

Chalcopyrite 0,01 0,12 - - -

Pyrite 92,90 49,98 25,81 13,69 0,28

Arsenopyrite 2,93 8,28 8,91 1,22 <0,01

Other sulfides 0,02 0,61 0,08 - 0,01

Cassiterite 0,07 - 0,90 - -

Quartz 0,21 0,04 - - -


Other silicates - - - - -


Others 0,10 - - - -





and 90%);




25 and 50%);


less than 25%).

Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 2,21 1,58 1,59 1,36 41,22

7-15 m 5,23 2,15 1,60 1,38 11,97

15-30 m 7,79 2,15 - - 1,28

30-63 m 9,58 - - - -

>63 m 8,91 - - - -




Report 027/17



<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17


STRINGER

Sample MS_03/231

Modal mineralogy





Galena 0,24 0,11 221

Pyrite 25,13 17,31 2342


Enargite 0,15 0,11 80



Kesterite <0,01 <0,01 15

Clausthalite 0

Tiemannite 0

Acanthite 0

Naumannite 0

Amalgam (AuAgHg) 0

Luanheite 0

Quartz 1,70 2,24 255



Chlorites 59,79 69,43 24555



Titanite 0

Rutile 0,93 0,76 109


Goethite 0,08 0,07 37

Phosphates <0,01 <0,01 6

Vanadinite 0

Schultenite 0

Sulphur 0


Others 0,01 0,01 7

TOTAL 100,00 100,00 31365

Report 027/17





Sphalerite 0,10 4,28 96,42


Galena 100,00 0,19

Pyrite 42,51 78,18

Tetrahedrite 0,29 1,17 0,01 0,17 70,00 0,55

Enargite 18,16 2,20 0,28

Arsenopyrite 81,55 0,44 0,44 30,00


Kesterite 0,04 <0,01 0,01 3,16 0,07

Clausthalite

Tiemannite

Acanthite

Naumannite

Amalgam (AuAgHg)

Luanheite

Quartz


Dolomite

Chlorites 47,30

Phyllosilicates


Titanite

Rutile

Cassiterite 96,84

Goethite 0,17

Phosphates

Vanadinite

Schultenite

Sulphur

Alunite + clay 0,01

Others 0,05

TOTAL 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00





- the zinc is mostly distributed by the sphalerite (96,42%).

Report 027/17





180 - - 100,00

150 1,69 1,69 98,31

125 4,01 5,70 94,30

106 7,63 13,33 86,67

90 9,85 23,18 76,82

75 11,83 35,01 64,99

63 9,94 44,95 55,05

53 9,00 53,95 46,05

45 6,54 60,49 39,51

38 6,65 67,14 32,86

32 4,69 71,83 28,17

27 4,17 76,00 24,00

22 3,21 79,22 20,78

19 1,96 81,18 18,82

16 2,20 83,38 16,62

13,5 1,90 85,29 14,71

11,4 1,90 87,18 12,82

9,6 1,78 88,97 11,03

8,1 1,82 90,79 9,21

6,8 1,88 92,67 7,33

5,7 1,68 94,34 5,66

4,8 1,52 95,87 4,13

4,1 1,20 97,07 2,93

3,4 1,05 98,11 1,89

2,9 0,60 98,72 1,28

2,4 0,83 99,55 0,45

2 0,27 99,82 0,18

1,75 0,11 99,93 0,07

1,45 0,03 99,96 0,04

1,2 0,02 99,99 0,01

1 0,01 99,99 0,01

0,87 <0,01 100,00 <0,01

0,73 <0,01 100,00 <0,01

0,62 - 100,00 <0,01

0,52 <0,01 100,00 <0,01

0 - 100,00 -

Report 027/17




75 - - 100,00

63 11,94 11,94 88,06

53 1,56 13,49 86,51

45 1,16 14,65 85,35

38 - 14,65 85,35

32 10,02 24,68 75,32

27 5,65 30,33 69,67

22 11,29 41,62 58,38

19 6,49 48,11 51,89

16 7,88 55,99 44,01

13,5 5,28 61,27 38,73

11,4 6,95 68,22 31,78

9,6 6,71 74,93 25,07

8,1 5,98 80,91 19,09

6,8 5,41 86,32 13,68

5,7 3,57 89,89 10,11

4,8 3,13 93,02 6,98

4,1 2,02 95,04 4,96

3,4 1,95 96,99 3,01

2,9 1,54 98,53 1,47

2,4 1,12 99,65 0,35

2 0,17 99,82 0,18

1,75 0,07 99,89 0,11

1,45 0,05 99,94 0,06

1,2 0,04 99,98 0,02

1 0,01 99,99 0,01

0,87 <0,01 99,99 0,01

0,73 <0,01 99,99 0,01

0,62 - 99,99 0,01

0,52 <0,01 100,00 <0,01

0 - 100,00 -

Report 027/17




19 - - 100,00

16 2,97 2,97 97,03

13,5 11,76 14,73 85,27

11,4 6,64 21,37 78,63

9,6 5,20 26,57 73,43

8,1 4,47 31,04 68,96

6,8 10,58 41,61 58,39

5,7 8,43 50,04 49,96

4,8 8,64 58,68 41,32

4,1 8,33 67,01 32,99

3,4 5,92 72,93 27,07

2,9 5,24 78,17 21,83

2,4 6,40 84,57 15,43

2 3,55 88,12 11,88

1,75 2,84 90,96 9,04

1,45 3,27 94,23 5,77

1,2 4,71 98,94 1,06

1 0,94 99,89 0,11

0,87 0,10 99,99 0,01

0,73 0,01 100,00 -

0,62 - 100,00 -



11,4 - - 100,00

9,6 18,24 18,24 81,76

8,1 15,54 33,78 66,22

6,8 14,28 48,06 51,94

5,7 14,10 62,16 37,84

4,8 14,87 77,03 22,97

4,1 10,49 87,52 12,48

3,4 1,70 89,23 10,77

2,9 7,53 96,75 3,25

2,4 2,88 99,63 0,37

2 - 99,63 0,37

1,75 - 99,63 0,37

1,45 0,37 100,00 -

1,2 - 100,00 -

Report 027/17



Report 027/17





<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 6,05 12,99 27,56 56,62 116,81










Report 027/17




0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Sphalerite 41,54 16,41 5,21 6,59 30,24


Galena 0,22 1,49 5,02 0,07 0,02

Chalcopyrite 8,54 18,59 3,09 3,45 0,53

Pyrite 30,62 20,08 3,76 - 0,02

Arsenopyrite 0,60 - 0,08 - -

Other sulfides 1,05 7,01 5,09 0,79 1,29

Cassiterite 0,03 0,17 - - -

Quartz 1,55 - - - -



Carbonates 0,14 0,16 - 0,04 -

Others 0,26 0,07 - - -












Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 0,03 0,19 0,26 0,19 6,22

7-15 m 0,30 0,47 1,06 3,25 9,85

15-30 m 2,21 1,42 2,95 3,15 4,53

30-63 m 13,42 11,14 0,94 - 1,73

>63 m 25,59 3,20 - - 7,91


As we can see in the Figure 47, most of the sphalerite is unliberated. The majority of the unliberated

mineral is included in the coarser fractions.

Report 027/17



<7 m

Report 027/17


7-15 m

Report 027/17


15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17





<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 6,05 12,99 27,56 56,62 116,81

… of the galena 5,48 11,98 13,36 14,44 7,21









Report 027/17




0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Galena 62,86 13,15 1,67 1,78 20,54


Sphalerite 3,04 13,49 15,06 - 1,23

Chalcopyrite 9,01 11,15 15,21 - -

Pyrite 61,83 37,33 - 1,03 -

Arsenopyrite 0,97 - - - -



Quartz 0,35 - - - -


Other silicates - - - - -

Carbonates 0,03 - - - -

Others 0,03 - - - -





and 90%);



- 13,15% of the galena is included in low grade particles (particles where the galena represents



less than 25%).

Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 0,20 0,65 0,22 0,71 10,17

7-15 m 1,25 - 1,45 1,07 7,40

15-30 m 6,03 7,02 - - 2,97

30-63 m 31,30 5,48 - - -

>63 m 24,08 - - - -


As we can see in the Figure 48, most of the galena is unliberated. The majority of the unliberated


Report 027/17



<7 m

7-15 m

15-30 m

Report 027/17


30-63 m

Report 027/17


>63 m

Report 027/17


Sample MS_03/249

Modal mineralogy





Galena 0,01 <0,01 10

Pyrite 9,09 5,71 686

Tetrahedrite <0,01 <0,01 1

Enargite 1,27 0,90 137



Kesterite 0

Clausthalite 0

Tiemannite 0

Acanthite 0

Naumannite 0

Amalgam (AuAgHg) 0

Luanheite 0

Quartz 14,14 16,95 2998


Dolomite 0,07 0,08 11

Chlorites 62,74 65,79 24130



Titanite <0,01 <0,01 2

Rutile 0,31 0,23 50


Goethite 0,13 0,11 19


Vanadinite 0

Schultenite 0

Sulphur 0


Others 0,03 0,01 4

TOTAL 100,00 100,00 31365

Report 027/17





Sphalerite 0,31 19,76 98,06


Galena 100,00 0,02

Pyrite 21,49 60,15

Tetrahedrite <0,01 0,01 <0,01 <0,01 27,50 <0,01

Enargite 98,08 24,31 5,14

Arsenopyrite 1,92 0,02 0,04 72,50


Kesterite

Clausthalite

Tiemannite

Acanthite

Naumannite

Amalgam (AuAgHg)

Luanheite

Quartz


Dolomite

Chlorites 72,07

Phyllosilicates


Titanite <0,01

Rutile

Cassiterite 100,00

Goethite 0,41

Phosphates

Vanadinite

Schultenite

Sulphur

Alunite + clay 0,05

Others 0,16

TOTAL 100,00 100,00 100,00 100,00 100,00 100,00 100,00 100,00



and enargite are the other important copper minerals in the sample;


- the zinc is mostly distributed by the sphalerite (98,06%).

Report 027/17





180 - - 100,00

150 2,21 2,21 97,79

125 1,56 3,77 96,23

106 1,74 5,51 94,49

90 6,04 11,54 88,46

75 4,42 15,97 84,03

63 6,44 22,41 77,59

53 4,04 26,45 73,55

45 6,11 32,56 67,44

38 4,90 37,45 62,55

32 4,28 41,73 58,27

27 4,87 46,60 53,40

22 5,03 51,63 48,37

19 3,88 55,51 44,49

16 3,86 59,37 40,63

13,5 4,33 63,71 36,29

11,4 4,05 67,76 32,24

9,6 4,65 72,41 27,59

8,1 4,80 77,21 22,79

6,8 4,87 82,08 17,92

5,7 4,90 86,98 13,02

4,8 4,01 90,98 9,02

4,1 3,07 94,05 5,95

3,4 2,63 96,68 3,32

2,9 1,33 98,02 1,98

2,4 1,16 99,18 0,82

2 0,54 99,72 0,28

1,75 0,19 99,90 0,10

1,45 0,05 99,96 0,04

1,2 0,03 99,99 0,01

1 0,01 99,99 0,01

0,87 <0,01 100,00 <0,01

0,73 <0,01 100,00 <0,01

0,62 - 100,00 <0,01

0,52 <0,01 100,00 <0,01

0 - 100,00 -

Report 027/17




106 - - 100,00

90 10,17 10,17 89,83

75 - 10,17 89,83

63 2,65 12,82 87,18

53 6,38 19,21 80,79

45 - 19,21 80,79

38 7,67 26,88 73,12

32 13,82 40,69 59,31

27 8,36 49,06 50,94

22 5,93 54,99 45,01

19 4,41 59,39 40,61

16 4,76 64,15 35,85

13,5 5,75 69,90 30,10

11,4 5,91 75,81 24,19

9,6 5,43 81,24 18,76

8,1 4,32 85,56 14,44

6,8 4,95 90,51 9,49

5,7 3,92 94,43 5,57

4,8 2,34 96,78 3,22

4,1 1,37 98,15 1,85

3,4 0,74 98,89 1,11

2,9 0,46 99,35 0,65

2,4 0,51 99,87 0,13

2 0,09 99,95 0,05

1,75 0,02 99,98 0,02

1,45 0,01 99,98 0,02

1,2 0,01 99,99 0,01

1 <0,01 100,00 <0,01

0,87 - 100,00 <0,01

0,73 - 100,00 <0,01

0,62 - 100,00 <0,01

0,52 <0,01 100,00 <0,01

0 <0,01 100,00 -

Report 027/17




5,7 - - 100,00

4,8 21,57 21,57 78,43

4,1 27,30 48,87 51,13

3,4 - 48,87 51,13

2,9 10,43 59,30 40,70

2,4 11,13 70,43 29,57

2 6,61 77,04 22,96

1,75 16,52 93,57 6,43

1,45 2,61 96,17 3,83

1,2 2,43 98,61 1,39

1 1,39 100,00 -

0,87 - 100,00 -



8,1 - - 100,00

6,8 28,11 28,11 71,89

5,7 24,46 52,57 47,43

4,8 23,01 75,58 24,42

4,1 14,16 89,73 10,27

3,4 6,68 96,42 3,58

2,9 - 96,42 3,58

2,4 3,58 100,00 -

2 - 100,00 -

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<7 m 7-15 m 15-30 m 30-63 m >63 m



… of the particles 6,14 12,76 26,40 52,71 117,20










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0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Sphalerite 7,04 7,77 10,65 5,84 68,70


Galena 0,01 - - - -

Chalcopyrite 0,90 6,83 0,47 0,75 0,15

Pyrite 21,11 14,92 0,47 3,76 <0,01


Other sulfides 6,83 11,99 24,24 2,03 1,34


Quartz 16,11 0,10 0,89 0,10 <0,01


Other silicates 0,05 0,02 0,05 - -

Carbonates 0,02 1,00 - - 0,02

Others 0,37 0,18 - - -












Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m 0,01 0,03 0,17 0,58 6,13

7-15 m 0,50 0,88 0,62 1,27 16,22

15-30 m 1,28 2,17 0,90 2,06 17,87

30-63 m 2,35 2,60 6,39 1,93 15,66

>63 m 2,90 2,09 2,57 - 12,82


As we can see in the Figure 50, most of the sphalerite is unliberated. The majority of the unliberated


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<7 m

Report 027/17


7-15 m

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15-30 m

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30-63 m

Report 027/17


>63 m

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<7 m 7-15 m 15-30 m 30-63 m >63 m

Galena (% of the mineral) 41,91 - - 54,26 3,83


… of the particles 6,14 12,76 26,40 52,71 117,20

… of the galena 4,59 - - 5,25 1,37









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0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

Galena 58,09 - - - 41,91


Sphalerite 0,37 - - - -

Chalcopyrite 0,05 - - - -

Pyrite 83,71 - - - -




Quartz 1,83 - - - -




Others 0,03 - - - -





and 90%);




25 and 50%);


less than 25%).

Report 027/17





0% < x <= 25% 25% < x <= 50% 50% < x <= 75% 75% < x <= 90% 90%< x <= 100%

<7 m - - - - 41,91

7-15 m - - - - -

15-30 m - - - - -

30-63 m 54,26 - - - -

>63 m 3,83 - - - -


Galena has a very low representativeness in this sample. However we can see a bimodal distribution

between: fine liberated particles and coarse unliberated low grade particles.

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<7 m

7-15 m No particles in this class.

15-30 m No particles in this class.

30-63 m

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>63 m

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End of report

This report can only be reproduced in its entirety. The results obtained refer exclusively to the sample (s) tested. Sampling is the responsibility of the customer.

Pedro Nuno Alves

(Responsável pelo Laboratório)

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