Outer Melanesian Arc I - Papua New Guinea

Eocene to Holocene Outer Melanesian magmatic arc, Papua New Guinea
Tract ID 009pCu7207
Country Papua New Guinea
Commodity Cu
Study area name Southeast Asia and Melanesia
Tectonic setting island arc
Deposit type porphyry copper
Grade-tonnage model Porphyry copper, Cu-Au subtype (Singer and others, 2008)
Geologic age
Geologic feature age Eocene through Holocene
Generalized age Tertiary-Paleogene
Oldest rocks age 55.8Ma
Youngest rocks age 0Ma
Age range 55.8Ma
Identified Cu resources 7,200,000metric tons
Known prospects 16
Mean Cu (t/sq km) 1010t/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
2 90%
5 50%
10 10%
10 5%
10 1%
Mean estimated deposits 5.47 ±2.97 (0.54%)
Probability of mean 0.32
Probability of no copper 0.04

Estimated deposit density

Known
deposits
Total
deposits
Area
(sq km)
Deposit density
per 100,000 sq km
2 7.47 16,834 44

Mean estimated tonnage

Copper 17,000,000
Molybdenum 95,000
Gold 1,200
Silver 5,400
Ore 3,400

Undiscovered copper resource

Confidence level 95% 90% 50% 10% 5%
Tonnage 260,000 1,200,000 9,800,000 42,000,000 61,000,000

Economic analysis

Fraser country Papua New Guinea
Fraser type 0.08%
Fraser high 0.92%
Typical cost 0%
High cost 1%
Infrastructure setting High cost
Comments on depth deep
Expected depth distribution
0 - 250m 0.1
250m - 500m 0.3
500m - 1km 0.6
Economically recoverable resources
Copper 7,400,000t
Molybdenum 31,000t
Gold 340t
Silver 2,400t
Probability no econ recoverable 0.59
Econ NPV 1,300x $1M
Exp dollars 32.11x $1M/100,000 sq km
Exp value class Medium

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
Panguna deposit North Solomons Papua New Guinea Past Producer Details
Aniwea prospect Manus Papua New Guinea Occurrence Details
Feni prospect New Ireland Papua New Guinea Occurrence Details
Ladolam prospect New Ireland Papua New Guinea Occurrence Details
unnamed prospect New Ireland Papua New Guinea Occurrence Details
unnamed prospect New Ireland Papua New Guinea Occurrence Details
Njekel prospect Manus Papua New Guinea Occurrence Details
Simberi prospect New Ireland Papua New Guinea Occurrence Details
Tabar Island prospect New Ireland Papua New Guinea Occurrence Details
Tatau gold/copper project prospect New Ireland Papua New Guinea Occurrence Details
Wamatja prospect Manus Papua New Guinea Occurrence Details
Wytar prospect Manus Papua New Guinea Occurrence Details
New Hanover prospect New Ireland Papua New Guinea Occurrence Details
Manus Island gold/copper project prospect Manus Papua New Guinea Prospect Details
Palabong copper/gold project prospect New Ireland Papua New Guinea Prospect Details
Weitin River copper/gold project prospect New Ireland Papua New Guinea Prospect Details
Arie deposit Manus Papua New Guinea Prospect Details
Mount Kren prospect Manus Papua New Guinea Prospect Details
Legusulum prospect New Ireland Papua New Guinea Prospect Details