Colombia Paleocene–Eocene Acandi

Paleocene-Eocene mostly calc-alkaline plutons including tonalities, diorites, and granodiorites of the Mande batholith (Colombia), Acandi batholith (Colombia-Panama), Santiago batholith (Peru), and some outliers.
Tract ID 005pCu1001
Country Colombia-Ecuador-Panama
Commodity Cu
Study area name Andes
Tectonic setting island arc
Deposit type porphyry copper
Grade-tonnage model General porphyry copper model (Singer and others, 2005)
Geologic age
Geologic feature age Paleocene through Eocene
Generalized age Tertiary-Paleogene
Oldest rocks age 65.5Ma
Youngest rocks age 33.9Ma
Age range 31.6Ma
Identified Cu resources 10,000,000metric tons
Known prospects 2
Mean Cu (t/sq km) 639t/sq km
Map scales used 500K

Results of the assessment

Assessment date 2005
Estimators Carlos Mario Celada, Vladimir I. Berger, Joseph A Briskey, Charles G. Cunningham, Donald A. Singer, David M. Sutphin, Waldo Vivallo S., and Eduardo O. Zappettini
Assessment depth 1km
Quantitative assessment Yes

Estimated number of deposits

Number of deposits Confidence level
3 90%
8 50%
19 10%
19 5%
19 1%
Mean estimated deposits 9.6 ±5.87 (0.61%)
Probability of mean 0.36
Probability of no copper 0.03

Estimated deposit density

(sq km)
Deposit density
per 100,000 sq km
2 11.6 51,610 22

Mean estimated tonnage

Copper 33,000,000
Molybdenum 810,000
Gold 790
Silver 11,000
Ore 6,400,000,000

Undiscovered copper resource

Confidence level 95% 90% 50% 10% 5%
Tonnage 760,000 3,100,000 23,000,000 76,000,000 100,000,000

Economic analysis

Fraser country Colombia
Fraser type 0.47%
Fraser high 0.53%
Typical cost 0.36%
High cost 0.64%
Infrastructure setting Mixed
Comments on depth 30% cover; plutons & volcanics
Expected depth distribution
0 - 250m 0.25
250m - 500m 0.25
500m - 1km 0.5
Economically recoverable resources
Copper 18,000,000t
Molybdenum 320,000t
Gold 300t
Silver 5,700t
Probability no econ recoverable 0.14
Econ NPV 4,200x $1M
Exp dollars 73.03x $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
Acandi prospect Chocó Colombia Prospect Details
Pegadorcito-Pantanos prospect Antioquia Colombia Occurrence Details
Murindo prospect Chocó Colombia Occurrence Details
Rio Pito prospect Darién Panama Occurrence Details