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

Names and other identifiers

Tract name Luzon Arc (western segment) (142pCu7301c)
Site status deposit

Geographic location

Country Philippines
State or province Zambales
Geographic location 120.335980004, 14.958811011
Geologic map unit 120.335980004, 14.958811011
Nearby data

Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Au
Age (Ma) 2.7Ma
Age determination method K-Ar sericite
Age range 2.7 Ma (K-Ar sericite); 2.50 ±0.23 Ma (K-Ar whole rock)
Age reference Malihan (1987); Imai (2002)
Minerals alunite, anhydrite/gypsum, azurite/malachite, biotite, bornite, chalcocite, chalcopyrite, chlorite, cinnabar, copper, diaspore, electrum, enargite, epidote, galena, gold, graphite, hematite/specularite, jarosite, kaolinite, magnetite, marcasite, molybdenite, montmorillonite, pyrite, pyrophyllite, sericite, sphalerite, stibnite, tetrahedrite, tourmaline
Associated rocks andesite porphyry, breccia, dacite porphyry, quartz diorite porphyry, basalt, dacite, andesite, diorite
Tectonic setting island arc
Stratigraphic age Pliocene–Pleistocene

Commodity and development information

Development status Producer
Major commodities Cu, Mo, Au, Ag
Tonnage (Mt) 187Mt
Cu grade (%) 0.36%
Mo grade (%) 0.003%
Au grade (g/t) 0.93g/t
Ag grade (g/t) 2g/t
Contained copper 670,000t
Gold-Moly ratio 300

Reference information

Comments Exposed.
Study area name East and Southeast Asia
References Almogela (1974); Anonymous (1997b); Hutchinson (1996); Imai (2002); Imai (2005); Imai and others (1992); Malihan (1987); Sillitoe (1989b); 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.
Anonymous, 1997b, The Dizon copper-gold project, Philippines: Mining Magazine (London), v. 146, no. 4, p. 268–279.
Hutchinson, C.S., 1996, South-East Asian oil, gas, coal and mineral deposits: Oxford, Clarendon Press, 265 p.
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.)Imai, A., 2005, Evolution of hydrothermal system at the Dizon porphyry Cu-Au deposit, Zambales, Philippines: Resource Geology, v. 55, no. 2, p.73–90. (Also available at 10.1111/j.1751-3928.2005.tb00230.x.)
Imai, A., Muyco, J.D., Domingo, E.G., Almeda, R.L., Villones, R.I., Yumul, G.P., Jr., Damasco, F.V., Baluda, R.I., Malihan, T.D., Datuin, R.T., Punongbayan, R.S., Listanco, E.L., and Santos, R.A., 1992, Porphyry copper and gold mineralization in the Philippines, in Kojima, Satoru, and Hase, Hirokazu, eds., Mineral deposits of Japan and the Philippines: Nagoya, Japan, Society of Resource Geology, 29th IGC Field Trip Guide Book, v. 6, p. C36-1–C36-30.
Malihan, T.D., 1987, The gold-rich Dizon porphyry copper mine in the western Central Luzon Island: Proceedings of Pacific Rim Congress '87, Australia, p. 303–307.
Sillitoe, R.H., 1989b, Gold deposits in western Pacific island arcs—The magmatic connection, in Keays, R.R., Ramsay, W.R.H., and Groves, D.I., eds., The geology of gold deposits—The perspective in 1988: Economic Geology Monograph 6, p. 274–291.
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/.