Carboniferous through Triassic island and continental arcs formed by subduction of Paleotethyan oceanic crust (the Loei and Truongson volcanic arcs)
Tract ID 142pCu7021
Country Cambodia-China-Lao People's Democratic Republic-Myanmar-Thailand-Viet Nam
Commodity Cu
Study area name Southeast Asia and Melanesia
Tectonic setting mixed
Deposit type porphyry copper
Grade-tonnage model Porphyry copper, Cu-Au subtype (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 1,200,000metric tons
Known prospects 4
Mean Cu (t/sq km) 104t/sq km
Map scales used 250K, 500K, 2M

Results of the assessment

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

Estimated number of deposits

Number of deposits Confidence level
3 90%
8 50%
26 10%
26 5%
26 1%
Mean estimated deposits 11.7 ±8.52 (0.73%)
Probability of mean 0.38
Probability of no copper 0.03

Estimated deposit density

(sq km)
Deposit density
per 100,000 sq km
1 12.7 354,260 4

Mean estimated tonnage

Copper 37,000,000
Molybdenum 210,000
Gold 2,700
Silver 12,000
Ore 7,400

Undiscovered copper resource

Confidence level 95% 90% 50% 10% 5%
Tonnage 900,000 2,900,000 24,000,000 90,000,000 110,000,000

Economic analysis

Fraser country China, Myanmar, Thailand, Lao People’s Democratic Republic, Cambodia, and Vietnam *
Fraser type 0.18%
Fraser high 0.82%
Typical cost 0%
High cost 1%
Infrastructure setting High cost
Expected depth distribution
0 - 250m 0.25
250m - 500m 0.25
500m - 1km 0.5
Economically recoverable resources
Copper 18,000,000t
Molybdenum 74,000t
Gold 880t
Silver 5,700t
Probability no econ recoverable 0.2
Econ NPV 3,400x $1M
Exp dollars 7.87x $1M/100,000 sq km
Exp value class Low

Bibliographic references

General Hammarstrom and others (2013)
Economic Robinson and Menzie (2012)

Deposits and prospects associated with this tract

Name Type State Country Development Details
Sa Thay prospect Kon Tum Viet Nam Prospect Details
Puthep prospect Loei Thailand Prospect Details
Phu Kam deposit Xiangkhoang Lao People's Democratic Republic Producer Details