Pimentón A new Cu-Au porphyry deposit in Farellones · 2015. 4. 8. · 15 pimentón project...

1 Pimentón Project –June 6, 2006

PimentónA new Cu-Au porphyry deposit in Farellones

This report by Rio Tinto dated June 6, 2006 was prepared as an Executive Summary

and is not compliant with National Instrument 43-101

2 Andean District - Chile Exploration June 6, 2006

Summary

•Exploration was carried out under an LOU between SAGCand Rio Tinto, signed in March 2005

• 8 holes were drilled totalling 3891m of diamond drilling

• A very well mineralised copper-gold porphyry system wasdiscovered

• Best results include 279m 0.4% Cu - 0.43g/T Au and 70m0.46% Cu - 0.49g/T Au

• Results of exploration programme conducted by Rio Tintohave added a significant value to the Pimentón project


Pimentón

0 m 500

N

3

14

Camp

Plant

86m @ 0.15% Cu &0.06g/t Au, from 11m

136m @ 0.17% Cu &0.04g/t Au, from 627m

34m @ 0.13% Cu &0.14g/t Au, from 188m

2

56

8

7

8

Phyllic

LegendLithology

Tuffs

PotassicAlteration

Propylitic

Tourmaline breccia

Proposed drill holes

Diorite porphyry

Auriferous quartz veins

Volcaniclastics

RT diamond drill holes

Other diamond drill holes


0 m 500

N

Volcaniclastics

Moraine

Pimentón Valley Valle Hondo

Intermineral

porphyry

Early porphyry

Tourmalinebreccia

Late porphyry

Lithology

Other diamonddrill holes

RT diamonddrill holes

6 42

Faul

t

626m

685m

465m

70m @ 0.46% Cu &0.49g/t Au, from 100m

279m @ 0.4% Cu &0.43g/t Au, from 312m

34m @ 0.13% Cu &0.14g/t Au, from 188m

PimentónSchematic Cross Section


Intermineral diorite porphyry

Late diorite porphyry


Pimentón – Hole 4 330mCu & Au mineralisationin potassically alteredearly diorite porhyry0.53% Cu – 0.56 g/t Au


Pimentón Hole 6 128mEarly diorite porphyrywith A-veinlets andchalcopyrite – bornitemineralisation


Intermineraldioriteporphyry

Early diorite porphyry


Early diorite porphyryIntermineral Dioriteporphyry


Early diorite porphyryIntermineral dioriteporphyry


Volcaniclastics

Moraine

M 5000

Valle Pimentón Valle Hondo

Intermineraldiorite porphyry

Early dioriteporphyry

Tourmalinebreccia

Late dioriteporphyry

Lithology



6 42

Faul

t

626m

685m

465m

70m @ 0.46% Cu & 0.49g/t Au, from 100m (0.8% Cu equivalent)


34m @ 0.13% Cu & 0.14g/t Au, from 188m

Volcaniclastics

Moraine

M 5000




Tourmalinebreccia


Lithology



6 42

Faul

t

626m

685m

465m



34m @ 0.13% Cu & 0.14g/t Au, from 188m

MODELO GEOLOGICOPREDICTIVO

MODELO GEOLOGICO CONINFORMACION DE NUEVOSSONDAJES


Mesotermal

Pórfido Cu

Epitermal

Argilica-Seric

A

Hm

B

Jr

C

Sericita

Sericita verde

Leached

Cp(+)

Argilica I

Biotita-FK-mgt

Biotita

Cp-Bn

BxTermal

Vetas QzAu

Cc/PyE.Sec.

Vetillas D (Py)

Vetas AuEsp-Cp

Calc-EpBr act-Qz-Ep-Esp-mgt

Vetilla B (Mo)

StockworkVetilla A

Mesotermal

Pórfido Cu

Epitermal

Argilica-Seric

A

Hm

B

Jr

C

Sericita

Sericita verde

Leached

Cp(+)

Argilica I

Biotita-FK-mgt

Biotita

Cp-Bn

BxTermal

Vetas QzAu

Cc/PyE.Sec.

Vetillas D (Py)

Vetas AuEsp-Cp


Vetilla B (Mo)

StockworkVetilla A

Argilica-Seric

A

Hm

B

Jr

C

Sericita

Sericita verde

Leached

Cp(+)

Argilica I

Biotita-FK-mgt

Biotita

Cp-Bn

BxTermal

Vetas QzAu

Cc/PyE.Sec.

Vetillas D (Py)

Vetas AuEsp-Cp


Vetilla B (Mo)

StockworkVetilla A

Pórfido DioríticoIntermineral

Pórfido DioríticoTemprano

Vt qz A truncada



Vt qz A truncada


Vt qz A – cp


Vt qz A – cp


Pórfido DioríticoTardío - sin vt qz


Pórfido DioríticoTardío - sin vt qz


FARELLONES

Unidad LitologíaColumna

Fm.A

C

BToba cristalina-lítica

Andesita porfídica, aglomerados, areniscas tobáceas y andesita grano fino

Toba soldada

Andesita porfídica gruesas y afaníticacon intercalaciones brechas volcánicas

FARELLONES

Unidad LitologíaColumna

Fm.A

C

BToba cristalina-lítica

Andesita porfídica, aglomerados, areniscas tobáceas y andesita grano fino

Toba soldada

Andesita porfídica gruesas y afaníticacon intercalaciones brechas volcánicas

B

C

A

B

C

A


3

14

Camp

Plant

M 5000

2

56

8

7

3

14

Camp

Plant

M 5000

2

56

8

7

SONDAJES PIMENTON

2005: 3 POZOS DDH – 1.822,9 m

2006: 5 POZOS DDH – 2.068,2 m

TOTAL 3.891,1 m

RIO TINTO

PIMENTON


CONTROL DE CALIDAD DE STANDARD ALTAR 1PM-DD-004 PROYECTO PIMENTON 2006

80009000

1000011000

1 3 5 7 9 11

BATCH

Cu

PPM

RANGO SUP ERIOR (VALOR 10007 P P M)RANGO INFERIOR (VALOR 9237 P P M)STANDARD

CONTROL DE CALIDAD DE STANDARD ALTAR 2 PM-DD-004 PROYECTO PIMENTON 2006

4000

5000

6000

2 4 6 8 10 12

BATCH

Cu P

PM


CONTROL DE DUPLICADO PM-DD-004 PROYECTO PIMENTON

0

5000

10000

1 2 3 4 5 6 7 8 9 10 11 12

BATCH

Cu

PPM

DUPLICADO PADRE

DUPLICADO HIJO

CONTROL DE CALIDAD DE STANDARD ALTAR 1 PM-DD-006 PROYECTO PIMENTON

8 0 0 0

9 0 0 0

10 0 0 0

110 0 0

1 3 4 6

B A TC H

Cu

PPM

RANGO SUP ERIOR (VALOR 10007 P P M)RANGO INFERIOR (VALOR 9237P P M)STANDARD

CONTROL DE CALIDAD DE STANDARD ALTAR 2 PM-DD-006 PROYECTO PIMEMTON

4000

5000

6000

2 5 7B A TC H

Cu

PPM

RANGO SUP ERIOR (VALOR 5282 P P M)

RANGO INFERIOR (VALOR 4779 P P M)

STANDARD

CONTROL DE CALIDAD DUPLICADO PM-DD-006 PROYECTO PIMENTON

02000400060008000

10000

1 2 3 4 5 6 7

BATCH

Cu

PPM

DUP LICADO P ADRE

DUP LICADO HIJ O

CONTROL DE CALIDAD DE STANDARD ALTAR 1PM-DD-004 PROYECTO PIMENTON 2006

80009000

1000011000

1 3 5 7 9 11

BATCH

Cu

PPM


CONTROL DE CALIDAD DE STANDARD ALTAR 2 PM-DD-004 PROYECTO PIMENTON 2006

4000

5000

6000

2 4 6 8 10 12

BATCH

Cu P

PM


CONTROL DE DUPLICADO PM-DD-004 PROYECTO PIMENTON

0

5000

10000

1 2 3 4 5 6 7 8 9 10 11 12

BATCH

Cu

PPM

DUPLICADO PADRE

DUPLICADO HIJO

CONTROL DE CALIDAD DE STANDARD ALTAR 1 PM-DD-006 PROYECTO PIMENTON

8 0 0 0

9 0 0 0

10 0 0 0

110 0 0

1 3 4 6

B A TC H

Cu

PPM

RANGO SUP ERIOR (VALOR 10007 P P M)RANGO INFERIOR (VALOR 9237P P M)STANDARD

CONTROL DE CALIDAD DE STANDARD ALTAR 2 PM-DD-006 PROYECTO PIMEMTON

4000

5000

6000

2 5 7B A TC H

Cu

PPM

RANGO SUP ERIOR (VALOR 5282 P P M)

RANGO INFERIOR (VALOR 4779 P P M)

STANDARD

CONTROL DE CALIDAD DUPLICADO PM-DD-006 PROYECTO PIMENTON

02000400060008000

10000

1 2 3 4 5 6 7

BATCH

Cu

PPM

DUP LICADO P ADRE

DUP LICADO HIJ O

CONTROL DE CALIDAD


Volcaniclastics

Moraine

M 5000




Tourmalinebreccia


Lithology



6 42

Faul

t

626m

685m

465m



34m @ 0.13% Cu & 0.14g/t Au, from 188m

SECCION LITOLOGIA-ESTRUCTURA


Cp - Py (~0.2% Cu)

Py (> Bn(> 0.7% Cu)

Cp > Py - Bn(~0.5% Cu)

Mineralisation

6 42

626m685m

465m





34m @ 0.13% Cu & 0.14g/t Au, from 188m

SECCION ZONA MINERAL


B

C

A

K

S

P

S-C

Ca-Na

C

ZONA DE ALTERACION


HOLE HOLE PM-DD-004 PM-DD-005

FROM TO LARGE m Cu% Au gr/tn FROM TO LARGE m Cu% Au gr/tn83.7 681.15 597.45 0.28 0.32 69 332 263 0.12 0.10

INCLUYE INCLUYEFROM LARGE m Cu% Au gr/tn FROM LARGE m Cu% Au gr/tn148.5 56 0.30 0.31 69 44 0.20 0.22259 49 0.22 0.22 151 20 0.32 0.15312 279 0.40 0.43

(312) 385 121 0.44 0.46(312) 553 35 0.44 0.46

591 37 0.22 0.25600 26 0.23 0.25

HOLE PM-DD-006

FROM TO LARGE m Cu% Au gr/tn95.5 464 368.5 0.23 0.26

INCLUYEFROM LARGE m Cu% Au gr/tn

100 72 0.46 0.48(100) 106 58 0.50 0.52

224 34 0.21 0.21280 20 0.23 0.27388 48 0.33 0.43

GRADE AVERAGE

GRADE AVERAGE

GRADE AVERAGE

3

14

Camp

Plant

M 5000

2

56

8

7

3

14

Camp

Plant

M 5000

2

56

8

7

RESULTADOS DE LEYES Cu - Au


Abundancia relativa % Leyes Metraje (m) magnetita calcopirita bornita % Cu gr/tn Au

vetillas Qz

197 4 2 a 3 0.27 0.38 B 330 2 a 3 0.31 0.38 B 357 3 a 3,5 1,5 a 2 traza 0.33 0.31 A y B 419 3 a 4 2,5 a 3 0.30 0.40 EB-B-D575 4 a 5 1,5 traza 0.40 0.47 EB-A-B

Cp - Py (~0.2% Cu)

Py (> Bn(> 0.7% Cu)

Cp > Py - Bn(~0.5% Cu)

Mineralisation

6 42

626m685m

465m





34m @ 0.13% Cu & 0.14g/t Au, from 188m

PM-DD-004


22 20 18 16 14 12 10 8 6 4 2 0 Ma

Volcanics and plutons 22-12 MaLate porphyries >6 Ma

BrecciasK-alteration10-6.9 Ma

Los Pelambres

Los Bronces- Rio Blanco

Volcanics 21-14 Ma

Plutons 20-7.6 Ma Breccias 7.3-4.2 Ma

K-alteration>5.4 Ma

Late porphyries 5.2-3.9 Ma

El TenienteVolcanics 14-5.6 Ma

Plutons 8-7 Ma

Alteration>4.4 Ma

Late dykes 3.8-1.8 Ma

Braden BrecciaTeniente Porphyry4.6-4 Ma

Pimentón

Sericite10.37 +/- 0.19 Ma

Secondary Biotite9.94 +/- 0.14 Ma

22 20 18 16 14 12 10 8 6 4 2 0 Ma22 20 18 16 14 12 10 8 6 4 2 0 Ma

Volcanics and plutons 22-12 MaLate porphyries >6 Ma

BrecciasK-alteration10-6.9 Ma

Los Pelambres

Los Bronces- Rio Blanco

Volcanics 21-14 Ma

Plutons 20-7.6 Ma Breccias 7.3-4.2 Ma

K-alteration>5.4 Ma

Late porphyries 5.2-3.9 Ma

El TenienteVolcanics 14-5.6 Ma

Plutons 8-7 Ma

Alteration>4.4 Ma

Late dykes 3.8-1.8 Ma

Braden BrecciaTeniente Porphyry4.6-4 Ma

Pimentón

Sericite10.37 +/- 0.19 Ma

Secondary Biotite9.94 +/- 0.14 Ma

PimentónPimentón

DisputadaDisputadaDisputada

PelambresPelambresPelambres

Teniente

Lowest extraction level 1983 mts

Mineralisation drilled to at least 1200 mts TenienteTeniente

Lowest extraction level 1983 mts

Mineralisation drilled to at least 1200 mts

3000 m.a.s.l

4000 m.a.s.l

3500 m.a.s.l

2500 m.a.s.l

2000 m.a.s.l

1500 m.a.s.l

3000 m.a.s.l

4000 m.a.s.l

3500 m.a.s.l

2500 m.a.s.l

2000 m.a.s.l

1500 m.a.s.l


Conclusions and recommendations

• A large Cu-Au porphyry deposit was identified in thePimentón valley under relatively shallow moraine

• This new Cu-Au deposit is one of the most significantdiscoveries in the Farellones belt in the last years

• Although the Cu and Au grades can be consideredsubeconomic at this stage, there is potential for a highgrade core in depth


Conclusions and recommendations (cont.)

• It is recommend to drill a few deep holes in the mainvalley to evaluate the vertical extension of mineralisation

• Potential resources of several hundreds million tonnesis thought to be a realistic scenario

• Results of exploration programme done by Rio Tintohave added a significant value to the Pimentón projectand subsequently to their stakeholders

Pimentón A new Cu-Au porphyry deposit in Farellones · 2015. 4. 8. · 15 pimentón project...

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