Chacay Poject

An hydrothermal alteration area

possible asociated to Cretacius

porphyry Cu-Au system, Easten to

IOCG Copper ore bodiesJosé Pablo Astudillo

Geólogo y MBA UCN

Location

Chacay Project it

located 36 km NE of

La Serena, 22 km NE

from Lambert

metalurtgical plant

(CMSG) and 10 km

from El Romeral

Mine (CMP).

Chacay project

Mine El Romeral

Mine property

1.600 hectares

extention

Actividades realizadas en el Proyecto Chacay

- Mine area ownership (1.600 Hectares).

- Geological mapping scale 1:5.000.

- Surface geochimestry, old mine labors and outcrops sampling.

- 310 geological mapping control points and over 250 rock sampled (diferents

geological units).

- Spectral analysis of 221 surface samples (Spectrum Geosoluciones laboratory).

GEOLOGICAL MAPPING

310

GEOLOGICAL

MAPPING

CONTROL

POINTS

1. HIDROTHERMAL ALTERATION

ZONE….

…Possible Cretacius porphyry Cu-Au

system.

Hidrothermal alteration

zone

v/s

Regional Ground

magnetometry

Hidrothermal alteration

zone

2.400 x 600 m

Plomo

> 40 ppm

Surface

Geoche-

mistery

Arsénico

> 100 ppm

Mercurio

> 5 ppm

Plata

> 2 ppm

Oro

> 0,1 gr/ton

Cobre

> 300 ppm

Surface

Geochemistery

Molibdeno

> 25 ppm

Spectral Analysis

VIS/NIR/SWIR

Early Quartz vein “A-type” exposed on surface

Hidrothermal alteration zone

Spectral Analysis

VIS/NIR/SWIR

Proyecto Chacay

Early Quartz vein “A-type” exposed on surface

Hidrothermal alteration zone

Características Principales

Zona de alteración hidrotermal

-Main alteration zone 2,400 meters long and

600 meters wide.

- Strong occurrence of hematite, jarosite and

gohetite on the surface, this reflects leached

zone similar to Dos Amigos, Carmen de

Andacollo, Puquios, etc.

-124 veins of quartz with limonites on

surface.

- Evidence of pyrite, arsenopyrite in veinlets

and disseminated with limonites.

-Early quartz veins similar to those found in

other copper porphyries.

-Evidences of copper oxides (malachite and

chrysocolla) on the surface.

-Evidences of Pyrite boxworks, triangular

texrtures similars ad Galen a las de galena.

-Occurrence of okeous silica (vuggy silica),

dog quartz tooth, polydirectional limonite

veinlets.

- Areas with alteration of albita that destroys

the original texture of the rock.

- Sericite quartz alteration that destroys the

texture of box rock.

-Alteration of silica that destroys the texture

of box rock.

-Tourmaline alteration in veinlets.

-Numerous structures that make up an

extensional duplex.

Hidrothermal alteration zone

-Possible presence of alunite shows an

advanced argillic event within the project.

-Old artesanal labored gold veins

- Main geochemical anomalies recognized:

Plomo ( Pb) > 40 ppm

Arsénico (Ar) > 100 ppm

Mercurio (Hg) > 5 ppm

Plata (Ag) > 2 ppm

Oro (Au) > 0,1 gr/ton

Molibdeno (Mo)> 25 ppm

Cobre (Cu)> 300 ppm

Zona de alteración hidrotermal

2. Copper and Gold projects

IOCG enviroment. Eastern

Hidrothermal alteration zone

Geological surface mapping

Malachite - Chrysocolla

1:10.000

Copper oxides

v/s

Regional grownd

magnetometry

Malachite - Chrysocolla

1:10.000

Copper Oxide main target areas

0 500 m

1. Vaquita Flora

2. Catana

3. Vetas Sur

1. Vaquita Flora.

Continuous copper oxides outcrops

Surface sampling and resources potential, Vaquita Flora

Proyecto Recursos potenciales % CuS

Vaquita flora óxidos 858.600 0,96

1. Vaquita Flora

East view; Important copper oxides outcrops

1. Vaquita Flora

Copper

oxide

zone

Potencial de sulfuros.

Proyecto Recursos potenciales % CuS

Vaquita flora sulfuros 5.151.000 1,18

1. Vaquita Flora

Surface sampling and sulphide potential

Proyecto Recursos potenciales % CuT AuT

Catana 678.000 3,1 0,29

2. Catana

3. Suthen veins

Au- Cu vein Stock,

Southeast area of the

hidrothermal

Alteration zone.

Thanks