Chile Eocene–Oligocene Chuquicamata

Eocene to Oligocene mainly calc-alkaline plutons, including epizonal plutons intruding volcanic-arc lava flows and breccias; equivalent to rocks in tracts SA09PC and SA12PC.
Tract ID 005pCu1010
Country Chile
Commodity Cu
Study area name Andes
Tectonic setting continental margin
Deposit type porphyry copper
Grade-tonnage model Giant porphyry copper model (Singer, Briskey,and Cunningham, 2008)
Geologic age
Geologic feature age Eocene and Oligocene
Generalized age Tertiary-Paleogene
Oldest rocks age 55.8Ma
Youngest rocks age 23.03Ma
Age range 32.77Ma
Identified Cu resources 340,000,000metric tons
Known prospects 5
Mean Cu (t/sq km) 8174t/sq km
Map scales used 1M

Results of the assessment

Assessment date 2005
Estimators Carlos Mario Celada, Vladimir I. Berger, Charles G. Cunningham, Alejandro Diaz, Mariano Gajardo M., Carlos Portigliati, Alvaro Puig Godoy, Donald A. Singer, Waldo Vivallo S., and Eduardo O. Zappettini
Assessment depth 1km
Quantitative assessment Yes

Estimated number of deposits

Number of deposits Confidence level
3 90%
5 50%
11 10%
11 5%
11 1%
Mean estimated deposits 6 ±3.11 (0.52%)
Probability of mean 0.45
Probability of no copper 0.03

Estimated deposit density

Known
deposits
Total
deposits
Area
(sq km)
Deposit density
per 100,000 sq km
14 20 25,690 78

Mean estimated tonnage

Copper 210,000,000
Molybdenum 6,300,000
Gold 1,300
Silver 70,000
Ore 27,000,000,000

Undiscovered copper resource

Confidence level 95% 90% 50% 10% 5%
Tonnage 22,000,000 46,000,000 190,000,000 400,000,000 470,000,000

Economic analysis

Fraser country Chile
Fraser type 0.79%
Fraser high 0.21%
Typical cost 1%
High cost 0%
Infrastructure setting Typical
Comments on depth 70% cover; explored at surface, default - thin cover
Expected depth distribution
0 - 250m 0.25
250m - 500m 0.25
500m - 1km 0.5
Economically recoverable resources
Copper 170,000,000t
Molybdenum 3,600,000t
Gold 890t
Silver 50,000t
Probability no econ recoverable 0.03
Econ NPV 51,000x $1M
Exp dollars 1924.11x $1M/100,000 sq km
Exp value class High

Bibliographic references

General Cunningham and others (2008)
Economic Robinson and Menzie (2012)

Deposits and prospects associated with this tract

Name Type State Country Development Details
Centinela prospect Antofagasta Chile Past Producer Details
Chimborazo deposit Antofagasta Chile Prospect Details
Chuquicamata deposit Antofagasta Chile Producer Details
Collahuasi deposit Antofagasta Chile Producer Details
Copaquire prospect Tarapacá Chile Prospect Details
El Abra deposit Antofagasta Chile Producer Details
Escondida deposit Antofagasta Chile Producer Details
Esperanza deposit Antofagasta Chile Prospect Details
Gaby deposit Antofagasta Chile Prospect Details
La Planada prospect Tarapacá Chile Occurrence Details
Mansa Mina deposit Antofagasta Chile Prospect Details
Opache deposit Antofagasta Chile Prospect Details
Polo Sur prospect Antofagasta Chile Occurrence Details
Potrerillos deposit Atacama Chile Producer Details
Quebrada Blanca deposit Tarapacá Chile Producer Details
Queen Elizabeth prospect Tarapacá Chile Occurrence Details
Toki deposit Antofagasta Chile Prospect Details
Ujina deposit Antofagasta Chile Producer Details
El Salvador deposit Atacama Chile Producer Details
Conchi deposit Antofagasta Chile Prospect Details
El Telégrafo deposit Antofogasta Chile Prospect Details