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  3. Global assessment of undiscovred copper resources

Luzon Arc (Central Cordillera segment)

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Oligocene to Holocene Luzon Arc
Tract ID 142pCu7301b
Country Philippines
Commodity Cu
Study area name East and Southeast Asia
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 16,000,000metric tons
Known prospects 36
Mean Cu (t/sq km) 1342t/sq km
Map scales used 1M

Results of the assessment

Assessment date 2011
Estimators Jane M. Hammarstrom, Gilpin R. Robinson, Jr., Steve Ludington, Arthur A. Bookstrom, and Michael L. Zientek
Assessment depth 1km
Quantitative assessment Yes

Estimated number of deposits

Number of deposits Confidence level
2 90%
9 50%
20 10%
20 5%
20 1%
Mean estimated deposits 10.07 ±6.39 (0.63%)
Probability of mean 0.38
Probability of no copper 0.04

Estimated deposit density

Known
deposits		 Total
deposits		 Area
(sq km)		 Deposit density
per 100,000 sq km
16 26.07 23,099 113

Mean estimated tonnage

Copper 31,000,000
Molybdenum 180,000
Gold 1,700
Silver 10,000
Ore 6,300

Undiscovered copper resource

Confidence level 95% 90% 50% 10% 5%
Tonnage 200,000 1,700,000 22,000,000 75,000,000 98,000,000

Economic analysis

Fraser country Philippines-Taiwan, Provnice of China
Fraser type 0.11%
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 15,000,000t
Molybdenum 64,000t
Gold 560t
Silver 4,800t
Probability no econ recoverable 0.25
Econ NPV 2,900x $1M
Exp dollars 139.31x $1M/100,000 sq km
Exp value class High

Bibliographic references

General Hammarstrom and others (2014)
Economic Robinson and Menzie (2012)
Hammarstrom, J.M., Bookstrom, A.A., DeMarr, M.W., Dicken, C.L., Ludington, Steve, Robinson, G.R., Jr., and Zientek, M.L., with contributions from Cox, D.P., Manipon, C.J.C., Rollan, L.A., Sakimoto, Takehiro, Takagi, Tetsuichi, and Watanabe, Yasushi, 2013,Porphyry copper assessment of East and Southeast Asia—Philippines, Taiwan (Republic of China), Republic of Korea (South Korea), and Japan: U.S. Geological Survey Scientific Investigations Report 2010–5090–P, 241 p., http://pubs.usgs.gov/sir/2010/5090/p/.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
Bucloc-Lamao prospect Abra Philippines Prospect Details
Boneng Lobo deposit Abra Philippines Occurrence Details
Kilongolao deposit Abra Philippines Prospect Details
Batong Buhay Group deposit Kalinga Philippines Past Producer Details
Botilao deposit Kalinga Philippines Prospect Details
Hale-Mayabo deposit Abra Philippines Prospect Details
Far Southeast-Bato Tabio deposit Benguet Philippines Prospect Details
St. Anthony prospect Benguet Philippines Prospect Details
Sinipsip prospect Benguet Philippines Prospect Details
Santo Niño Group deposit Benguet Philippines Past Producer Details
Tawi-Tawi deposit Benguet Philippines Prospect Details
Bolo/Tawi Tawi Copper/Gold Project prospect Pangasinan Philippines Prospect Details
Kennon South East/Black Mountain Group deposit Benguet Philippines Prospect Details
Santo Tomas II Group deposit Benguet Philippines Prospect Details
Bayaosen Copper prospect Abra Philippines Prospect Details
Camp 4 prospect Benguet Philippines Prospect Details
Carmen prospect Benguet Philippines Prospect Details
Claveria Copper/Gold Project prospect Cagayan Philippines Prospect Details
Conner Copper-Gold Project prospect Kalinga Philippines Prospect Details
Gambang Copper/Gold Project prospect Benguet Philippines Prospect Details
Dilong Hale prospect Benguet Philippines Prospect Details
Baay-Licuan Copper prospect Abra Philippines Prospect Details
Lacub prospect Abra Philippines Occurrence Details
Ampucao prospect Benguet Philippines Prospect Details
Km24 Tublay-Atok prospect Benguet Philippines Occurrence Details
Lomonan prospect Abra Philippines Occurrence Details
Masalin prospect Benguet Philippines Prospect Details
Nalbuan prospect Abra Philippines Occurrence Details
Polar prospect Benguet Philippines Prospect Details
Sakaang Gold/Copper prospect Ilocos Sur Philippines Occurrence Details
Sallapandan Copper prospect Abra Philippines Occurrence Details
Suluakan prospect Benguet Philippines Occurrence Details
Tibeg Copper prospect Abra Philippines Occurrence Details
Ud-Udiao Copper prospect Abra Philippines Occurrence Details
Victoria/Teresa Gold/Copper Operation prospect Benguet Philippines Occurrence Details
Balatoc prospect Kalinga Philippines Prospect Details
Guinaoang deposit Benguet Philippines Prospect Details
Palidan-Mohong Hill prospect Benguet Philippines Prospect Details
Bakun Gold/Copper Project prospect Benguet Philippines Prospect Details