Late Paleozoic Balkhash-Ili magmatic arc (northwest)

Early Carboniferous to Permian magmatic-arc and post-collisional rocks
Tract ID 142pCu8003d
Country Kazakhstan-Kyrgyzstan
Commodity Cu
Study area name West Central Asia
Tectonic setting continental margin
Deposit type porphyry copper
Grade-tonnage model General porphyry copper model (Singer and others, 2008)
Geologic age
Geologic feature age Early Carboniferous through Permian
Generalized age Paleozoic
Oldest rocks age 359.2Ma
Youngest rocks age 251Ma
Age range 108.2Ma
Identified Cu resources 3,300,000metric tons
Known prospects 5
Mean Cu (t/sq km) 70t/sq km
Map scales used 200K, 1.5M

Results of the assessment

Assessment date 2009
Estimators Byron R. Berger, Lawrence J. Drew, Jane M. Hammarstrom, John C. Mars, Jeffrey D. Phillips, David M. Sutphin, Michael L. Zientek
Assessment depth 1km
Quantitative assessment Yes

Estimated number of deposits

Number of deposits Confidence level
2 50%
4 10%
4 5%
4 1%
Mean estimated deposits 2 ±1.45 (0.73%)
Probability of mean 0.25
Probability of no copper 0.2

Estimated deposit density

Known
deposits
Total
deposits
Area
(sq km)
Deposit density
per 100,000 sq km
2 4 112,150 4

Mean estimated tonnage

Copper 7,800,000
Molybdenum 220,000
Gold 200
Silver 2,400
Ore 1,600

Undiscovered copper resource

Confidence level 50% 10% 5%
Tonnage 2,700,000 17,000,000 31,000,000

Economic analysis

Fraser country Kazakhstan
Fraser type 0.22%
Fraser high 0.79%
Typical cost 0%
High cost 1%
Infrastructure setting High cost
Comments on depth 100 m of sediments cover some prospecs; Intrusives~volcanics; exposures <25% of tract
Expected depth distribution
0 - 250m 0.25
250m - 500m 0.25
500m - 1km 0.5
Economically recoverable resources
Copper 3,800,000t
Molybdenum 85,000t
Gold 68t
Silver 1,100t
Probability no econ recoverable 0.8
Econ NPV 670x $1M
Exp dollars 1.63x $1M/100,000 sq km
Exp value class Very Low

Bibliographic references

General Berger and others (2014)
Economic Robinson and Menzie (2012)

Deposits and prospects associated with this tract

Name Type State Country Development Details
Kazkyrmys deposit Almaty oblysy Kazakhstan Prospect Details
Koksai deposit Almaty oblysy Kazakhstan Prospect Details
Vostok prospect Almaty oblysy Kazakhstan Occurrence Details
Vostok I prospect Almaty oblysy Kazakhstan Occurrence Details
Vostok II prospect Almaty oblysy Kazakhstan Occurrence Details
Vostok III prospect Almaty oblysy Kazakhstan Occurrence Details
Iliy prospect Almaty oblysy Kazakhstan Occurrence Details