Ordovician North Tian Shan magmatic arc

Middle to Late Ordovician North Tian Shan magmatic-arc
Tract ID 142pCu8002
Country Kazakhstan-Kyrgyzstan
Commodity Cu
Study area name West Central Asia
Tectonic setting mixed
Deposit type porphyry copper
Grade-tonnage model General porphyry copper model (Singer and others, 2008)
Geologic age
Geologic feature age Middle to Late Ordovician
Generalized age Paleozoic
Oldest rocks age 471.8Ma
Youngest rocks age 443.7Ma
Age range 28.1Ma
Identified Cu resources 2,000,000metric tons
Known prospects 5
Mean Cu (t/sq km) 639t/sq km
Map scales used 200K, 1.5M

Results of the assessment

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

Estimated number of deposits

Number of deposits Confidence level
1 50%
3 10%
3 5%
3 1%
Mean estimated deposits 1.3 ±1.17 (0.9%)
Probability of mean 0.23
Probability of no copper 0.3

Estimated deposit density

(sq km)
Deposit density
per 100,000 sq km
2 3.3 8,140 41

Mean estimated tonnage

Copper 5,200,000
Molybdenum 140,000
Gold 130
Silver 1,600
Ore 1,000

Undiscovered copper resource

Confidence level 50% 10% 5%
Tonnage 1,000,000 11,000,000 20,000,000

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 I>V; depth OK
Expected depth distribution
0 - 250m 0.25
250m - 500m 0.25
500m - 1km 0.5
Economically recoverable resources
Copper 2,500,000t
Molybdenum 54,000t
Gold 44t
Silver 750t
Probability no econ recoverable 0.88
Econ NPV 430x $1M
Exp dollars 5.96x $1M/100,000 sq km
Exp value class 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
Chatyrkul deposit Zhambyl oblysy Kazakhstan Producer Details
Taldy-Bulak deposit Talas Kyrgyzstan Prospect Details
Almalysai prospect Zhambyl oblysy Kazakhstan Occurrence Details
Andash prospect Talas Kyrgyzstan Occurrence Details
Chonur prospect Talas Kyrgyzstan Occurrence Details
Kurdai Drevny prospect Zhambyl oblysy Kazakhstan Occurrence Details