Gangdese

A linear belt of Oligocene and Miocene post-subduction igneous rocks in southwest China
Tract ID 142pCu8712
Country China
Commodity Cu
Study area name Tibetan Plateau
Tectonic setting postconvergence
Deposit type porphyry copper
Grade-tonnage model General porphyry copper model (Singer and others, 2008)
Geologic age
Geologic feature age Oligocene through Miocene
Generalized age Tertiary-Neogene
Oldest rocks age 33.9Ma
Youngest rocks age 5.332Ma
Age range 28.568Ma
Identified Cu resources 15,000,000metric tons
Known prospects 26
Mean Cu (t/sq km) 363t/sq km
Map scales used 500K, 2.5M

Results of the assessment

Assessment date 2010
Estimators Jane M. Hammarstrom, Steve Ludington, Gilpin R. Robinson Jr., Michael L. Zientek
Assessment depth 1km
Quantitative assessment Yes

Estimated number of deposits

Number of deposits Confidence level
9 90%
13 50%
50 10%
50 5%
50 1%
Mean estimated deposits 22.3 ±15.73 (0.71%)
Probability of mean 0.39
Probability of no copper 0.01

Estimated deposit density

Known
deposits
Total
deposits
Area
(sq km)
Deposit density
per 100,000 sq km
3 25.3 239,860 11

Mean estimated tonnage

Copper 87,000,000
Molybdenum 2,400,000
Gold 2,200
Silver 28,000
Ore 18,000

Undiscovered copper resource

Confidence level 95% 90% 50% 10% 5%
Tonnage 7,300,000 13,000,000 61,000,000 200,000,000 250,000,000

Economic analysis

Fraser country China (Vietnam proxy*)
Fraser type 0.18%
Fraser high 0.82%
Typical cost 0%
High cost 1%
Infrastructure setting High cost
Comments on depth default
Expected depth distribution
0 - 250m 0.25
250m - 500m 0.25
500m - 1km 0.5
Economically recoverable resources
Copper 43,000,000t
Molybdenum 930,000t
Gold 750t
Silver 13,000t
Probability no econ recoverable 0.05
Econ NPV 7,400x $1M
Exp dollars 29.47x $1M/100,000 sq km
Exp value class Medium

Bibliographic references

General Ludington, Hammarstrom, and others (2012)
Economic Robinson and Menzie (2012)

Deposits and prospects associated with this tract

Name Type State Country Development Details
Xietongmen deposit Xizang China Prospect Details
Qulong deposit Xizang China Prospect Details
Jiama deposit Xizang China Producer Details
Zhunuo prospect Xizang China Prospect Details
Banongla prospect Xizang China Prospect Details
Tangbai prospect Xizang China Prospect Details
Jiru prospect Xizang China Prospect Details
Ganjiang prospect Xizang China Prospect Details
Dubuqu prospect Xizang China Prospect Details
Tinggong prospect Xizang China Prospect Details
Zongxun prospect Xizang China Prospect Details
Nanmu prospect Xizang China Prospect Details
Lakang’e prospect Xizang China Prospect Details
Xiangbeishan prospect Xizang China Prospect Details
Liebu prospect Xizang China Prospect Details
Mingze prospect Xizang China Prospect Details
Chongmuda prospect Xizang China Prospect Details
Bangpu prospect Xizang China Prospect Details
Xiamari prospect Xizang China Prospect Details
Demingding prospect Xizang China Prospect Details
Sharang prospect Xizang China Prospect Details
Zemoduola prospect Xizang China Prospect Details
Chuibaizi prospect Xizang China Prospect Details
Tangbula prospect Xizang China Prospect Details