Boneng Lobo

Porphyry copper (Cu-Au) deposit in Abra, Philippines

Names and other identifiers

GMRAP ID 482
Alternate names Lobo-Boneng, Lobo, Boneng
Tract name Luzon Arc (Central Cordillera segment) (142pCu7301b)
Site status deposit

Geographic location

Country Philippines
State or province Abra
Geographic location 120.816666667, 17.466666666
Geologic map unit 120.816666667, 17.466666666
Nearby data

Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Au
Age (Ma) 10.49Ma
Age determination method K-Ar whole rock
Age range 10.49 ±0.37 Ma
Age reference Imai (2002)
Minerals actinolite, anhydrite/gypsum, azurite/malachite, barite, biotite, bornite, chalcocite, chalcopyrite, chlorite, chrysocolla, covellite, enargite, epidote, galena, goethite/limonite, gold, magnetite, molybdenite, pyrite, sericite, sphalerite, tetrahedr
Associated rocks andesite porphyry, breccia, dacite porphyry, andesite flow, basalt, limestone, quartz diorite porphyry, diorite porphyry
Tectonic setting island arc
Stratigraphic age Miocene

Commodity and development information

Development status Occurrence
Major commodities Cu, Mo, Au, Ag
Tonnage (Mt) 225Mt
Cu grade (%) 0.283%
Mo grade (%) 0.005%
Au grade (g/t) 0.26g/t
Ag grade (g/t) 4g/t
Contained copper 640,000t
Gold-Moly ratio 50

Reference information

Comments Exposed.
Study area name East and Southeast Asia
References Almogela (1974); Imai (2002); Jacinto (1977); Sillitoe and Gappe (1984); Singer and others (2008)
Site reference Hammarstrom and others (2014)
Almogela, D.H., 1974, Geologic environment and economic possibilities of porphyry copper deposits in the Philippines: Geological Society of the Philippines Journal, v. 28, no. 3, p. 1–16.
Imai, Akira, 2002, Metallogenesis of porphyry Cu deposits of the Western Luzon arc, Philippines—K-Ar ages, SO3 contents of microphenocrystic apatite and significance of intrusive rocks: Resource Geology, v. 52, no. 2, p. 147–161. (Also available at 10.1111/j.1751-3928.2002.tb00127.x.)
Jacinto, R.P., 1977, Alteration and mineralization of Lobo-Boneng area, Atok, Benguet, Philippines: 5th Symposium on Mineral Resources Development, Baguio City, November 1977, Section 1–A, Paper 6.
Sillitoe, R.H., and Gappe, I.M., Jr., 1984, Philippine porphyry copper deposits—Geologic setting and characteristics: Committee for Co-ordination of Joint Prospecting for Mineral Resources in Asian Offshore Areas (CCOP), CCOP Technical Publication 14, 89 p.
Singer, D.A., Berger, V.I., and Moring, B.C., 2008, Porphyry copper deposits of the world—Database and grade and tonnage models, 2008: U.S. Geological Survey Open-File Report 2008-1155, [45] p. and digital data, accessed December 31, 2013, at http://pubs.usgs.gov/of/2008/1155/.