Western Medial New Guinea Magmatic Belt

Eastern part of the late Miocene to Pliocene-Pleistocene Medial New Guinea Magmatic Belt
Tract ID 142pCu7203
Country Indonesia
Commodity Cu
Study area name Southeast Asia and Melanesia
Tectonic setting postconvergence
Deposit type porphyry copper
Grade-tonnage model Porphyry copper, Cu-Au subtype (Singer and others, 2008)
Geologic age
Geologic feature age late Miocene through Pleistocene
Generalized age Tertiary-Neogene
Oldest rocks age 11.6Ma
Youngest rocks age 9Ma
Age range 2.6Ma
Identified Cu resources 24,000,000metric tons
Known prospects 12
Mean Cu (t/sq km) 1055t/sq km
Map scales used 250K, 1M, 2M

Results of the assessment

Assessment date 2010
Estimators Gilpin R. Robinson, Jr., Steve Ludington, Jane M. Hammarstrom, Michael L. Zientek, Arthur A. Bookstrom, Alexander Yan Sze Wah, Bambang Setiabudi, Dwi Sunuhadai
Assessment depth 1km
Quantitative assessment Yes

Estimated number of deposits

Number of deposits Confidence level
1 90%
3 50%
10 10%
10 5%
10 1%
Mean estimated deposits 4.43 ±3.4 (0.77%)
Probability of mean 0.31
Probability of no copper 0.06

Estimated deposit density

Known
deposits
Total
deposits
Area
(sq km)
Deposit density
per 100,000 sq km
1 5.43 13,268 41

Mean estimated tonnage

Copper 14,000,000
Molybdenum 80,000
Gold 1,000
Silver 4,500
Ore 2,800

Undiscovered copper resource

Confidence level 90% 50% 10% 5%
Tonnage 310,000 6,500,000 36,000,000 54,000,000

Economic analysis

Fraser country Indonesia
Fraser type 0.13%
Fraser high 0.88%
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 6,700,000t
Molybdenum 28,000t
Gold 330t
Silver 2,100t
Probability no econ recoverable 0.54
Econ NPV 1,300x $1M
Exp dollars 52.13x $1M/100,000 sq km
Exp value class High

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
Pogatadi "E" prospect Papua Indonesia Occurrence Details
Tango One prospect Papua Indonesia Occurrence Details
Mogo-mogo prospect Papua Indonesia Occurrence Details
Obano prospect Papua Indonesia Occurrence Details
Papua Gold and Copper project prospect Papua Indonesia Occurrence Details
Pogatadi "B" prospect Papua Indonesia Occurrence Details
Pogatadi "C" and "D" prospect Papua Indonesia Occurrence Details
Ikerar prospect Papua Indonesia Prospect Details
Wabu skarn prospect Papua Indonesia Prospect Details
Aisasjur Gold/Copper Project prospect Papua Indonesia Prospect Details
Dawagu prospect Papua Indonesia Prospect Details
Komopa prospect Papua Indonesia Prospect Details
Grasberg deposit Papua Indonesia Producer Details