Argentina-Chile Miocene–Pliocene Cerro Casale

Miocene to Pliocene plutons; including continental volcanic rocks containing lava flows, volcanic breccias, and ash-flow tuffs in three bands trending northwest across this northeast-trending tract.
Tract ID 005pCu1013a
Country Argentina-Chile
Commodity Cu
Study area name Andes
Tectonic setting continental margin
Deposit type porphyry copper
Grade-tonnage model General porphyry copper model (Singer and others, 2005)
Geologic age
Geologic feature age Miocene through Pliocene
Generalized age Tertiary-Neogene
Oldest rocks age 23.03Ma
Youngest rocks age 2.588Ma
Age range 20.442Ma
Identified Cu resources 4,500,000metric tons
Known prospects 4
Mean Cu (t/sq km) 538t/sq km
Map scales used 1M

Results of the assessment

Assessment date 2006
Estimators Joseph A. Briskey, Charles G. Cunningham, Klaus J. Schulz, and Eduardo O. Zappettini.
Assessment depth 1km
Quantitative assessment Yes

Estimated number of deposits

Number of deposits Confidence level
4 90%
8 50%
24 10%
24 5%
24 1%
Mean estimated deposits 11.33 ±7.53 (0.66%)
Probability of mean 0.37
Probability of no copper 0.02

Estimated deposit density

(sq km)
Deposit density
per 100,000 sq km
1 12.33 70,587 17

Mean estimated tonnage

Copper 38,000,000
Molybdenum 950,000
Gold 910
Silver 13,000
Ore 7,500,000,000

Undiscovered copper resource

Confidence level 95% 90% 50% 10% 5%
Tonnage 1,800,000 4,200,000 25,000,000 89,000,000 120,000,000

Economic analysis

Fraser country Argentina-Chile (Catamarca*, Salta)
Fraser type 0.46%
Fraser high 0.54%
Typical cost 0.33%
High cost 0.67%
Infrastructure setting Mixed
Comments on depth 50% cover; volcanics
Expected depth distribution
0 - 250m 0.25
250m - 500m 0.25
500m - 1km 0.5
Economically recoverable resources
Copper 20,000,000t
Molybdenum 370,000t
Gold 340t
Silver 6,700t
Probability no econ recoverable 0.11
Econ NPV 4,800x $1M
Exp dollars 62.92x $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
Betito prospect Catamarca Argentina Occurrence Details
Cerro Casale deposit Atacama Chile Prospect Details
El Oculto prospect Jujuy Argentina Prospect Details
Inca Viejo prospect Salta Argentina Occurrence Details
Pancho Arias prospect Salta Argentina Occurrence Details