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  3. Global assessment of undiscovred copper resources

Jinsajiang

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Carboniferous through Triassic rocks that were formed as continental arcs by subduction of the Paleotethyan oceanic crust southward below Qiangtang (North Tibet) terrane and northward below north China.
Tract ID 142pCu8702
Country China
Commodity Cu
Study area name Central Asia Orogenic Belt
Tectonic setting island arc
Deposit type porphyry copper
Grade-tonnage model General porphyry copper model (Singer and others, 2008)
Geologic age
Geologic feature age Carboniferous through Triassic
Generalized age Paleozoic
Oldest rocks age 359.2Ma
Youngest rocks age 199.6Ma
Age range 159.6Ma
Identified Cu resources 4,500,000metric tons
Known prospects 11
Mean Cu (t/sq km) 179t/sq km
Map scales used 1M

Results of the assessment

Assessment date 2013
Estimators Alexeiev, D. (Russian Academy of Sciences); Bookstrom, Arthur A.(USGS); Frost, Thomas P. (USGS); Hammarstrom, Jane M. (USGS); Light, Thomas D. (USGS); Ludington, Steve (USGS); Mihalasky, Mark, J. (USGS); Panteleyev, Andre (XDM Geological Consultants)
Assessment depth 1km
Quantitative assessment Yes

Estimated number of deposits

Number of deposits Confidence level
2 90%
4 50%
14 10%
14 5%
14 1%
Mean estimated deposits 6.27 ±4.58 (0.73%)
Probability of mean 0.33
Probability of no copper 0.04

Estimated deposit density

Known
deposits		 Total
deposits		 Area
(sq km)		 Deposit density
per 100,000 sq km
2 8.27 111,687 7

Mean estimated tonnage

Copper 20,000,000
Molybdenum 110,000
Gold 1,400
Silver 6,700
Ore 4,000

Undiscovered copper resource

Confidence level 95% 90% 50% 10% 5%
Tonnage 300,000 1,000,000 10,000,000 52,000,000 72,000,000

Economic analysis

Fraser country China
Fraser type 0.52%
Fraser high 0.48%
Typical cost 0.52%
High cost 0.48%
Infrastructure setting Mixed
Comments on depth default
Expected depth distribution
0 - 250m 0.25
250m - 500m 0.25
500m - 1km 0.5
Economically recoverable resources
Copper 12,000,000t
Molybdenum 48,000t
Gold 610t
Silver 3,700t
Probability no econ recoverable 0.23
Econ NPV 3,300x $1M
Exp dollars 25.58x $1M/100,000 sq km
Exp value class Medium

Bibliographic references

General Mihalasky, Ludington, Hammarstrom, and others (2015)
Economic Robinson and Menzie (2012)
Mihalasky, M.J., Ludington, Steve, Hammarstrom, J.M., Alexeiev, D.V., Frost, T.P., Light, T.D., Robinson, G.R., Jr., Briggs, D.A., Wallis, J.C., and Miller, R.J., with contributions from Bookstrom, A.A., Panteleyev, Andre, Chitalin, Andre, Seltmann, Reimar, Guangsheng, Y., Changyun, L., Jingwen, M., Jinyi, L., Keyan, X., Ruizhao, Q., Jianbao, S., Gangyi, S., and Yuliang, D., 2015, Porphyry Copper Assessment of the Central Asian Orogenic Belt and eastern Tethysides—China, Mongolia, Russia, Pakistan, Kazakhstan, Tajikistan, and India: U.S. Geological Survey Scientific Investigations Report 2010–5090–X, 106 p. and spatial data, http://dx.doi.org/10.3133/sir20105090X.Robinson, G.R., Jr., and Menzie, W.D., 2012, Economic filters for evaluating porphyry copper deposit resource assessments using grade-tonnage deposit models, with examples from the U.S. Geological Survey global mineral resource assessment (ver 1.2, March 2014): U.S. Geological Survey Scientific Investigations Report 2010–5090–H, 21 p., http://pubs.usgs.gov/sir/2010/5090/h/.

Deposits and prospects associated with this tract

Name Type State Country Development Details
A're prospect Yunnan China Prospect Details
Changdagou prospect Sichuan China Prospect Details
Chundu prospect Yunnan China Prospect Details
Gaochiping prospect Yunnan China Prospect Details
Hongshan prospect Yunnan China Prospect Details
Langdu prospect Yunnan China Prospect Details
Lannitang prospect Yunnan China Prospect Details
Osaila prospect Yunnan China Prospect Details
Pulang deposit Yunnan China Prospect Details
Qiansui prospect Yunnan China Prospect Details
Songnuo prospect Yunnan China Prospect Details
Xuejiping deposit Yunnan China Prospect Details
Zhujiding prospect Yunnan China Prospect Details