Chile Permian El Loa

Permian calc-alkaline plutons. Tract is a northern continuation of tract SA16a,bPC and its location coincides largely with that of giant tract SA10a,bPC.
Tract ID 005pCu1018
Country 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 Permian
Generalized age Paleozoic
Oldest rocks age 299Ma
Youngest rocks age 251Ma
Age range 48Ma
Known prospects 5
Mean Cu (t/sq km) 422t/sq km
Map scales used 1M

Results of the assessment

Assessment date 2005
Estimators Carlos Mario Celada, Vladimir I. Berger, Rodrigo Carrasco, Alejandro Diaz, Mariano Gajardo M., Carlos Portigliati, 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
1 90%
2 50%
4 10%
4 5%
4 1%
Mean estimated deposits 2.23 ±1.21 (0.54%)
Probability of mean 0.26
Probability of no copper 0.06

Estimated deposit density

Known
deposits
Total
deposits
Area
(sq km)
Deposit density
per 100,000 sq km
2.23 17,765 13

Mean estimated tonnage

Copper 7,500,000
Molybdenum 190,000
Gold 170
Silver 2,500
Ore 1,500,000,000

Undiscovered copper resource

Confidence level 90% 50% 10% 5%
Tonnage 160,000 3,200,000 18,000,000 28,000,000

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 50% cover; younger cover; skew deep
Expected depth distribution
0 - 250m 0.1
250m - 500m 0.3
500m - 1km 0.6
Economically recoverable resources
Copper 4,800,000t
Molybdenum 86,000t
Gold 82t
Silver 1,500t
Probability no econ recoverable 0.54
Econ NPV 1,400x $1M
Exp dollars 59.16x $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
El Loa prospect Tarapacá Chile Prospect Details
Lilian prospect Antofagasta Chile Occurrence Details
Rio Frio prospect Antofagasta Chile Occurrence Details