Tampakan Group

Porphyry copper deposit in South Cotabato, Philippines

Names and other identifiers

Alternate names Tampakan
Tract name Cotabato Arc (142pCu7312)
Included sites Sodaco
Site status deposit

Geographic location

Country Philippines
State or province South Cotabato
Geographic location 125.049999999, 6.466667033
Geologic map unit 125.049999999, 6.466667033
Nearby data

Geologic information

Deposit type Porphyry copper
Age (Ma) 4.25Ma
Age determination method K-Ar, Ar-Ar, U-Pb
Age range 4.24–4.26 Ma
Age reference Middleton and others (2004); Rohrlach (2002)
Minerals alunite, anhydrite, bornite, chalcocite, chalcopyrite, chlorite, colusite, covellite, diaspore, dickite, digenite, enargite, epidote, galena, illite, luzonite, magnetite, molybdenite, pyrite, pyrophyllite, sericite, smectite, sphalerite, tennantite/tetrahedrite
Associated rocks breccia, diorite porphyry, quartz diorite porphyry, limestone, andesite porphyry, andesite, andesite pyroclastics, dacite, sandstone, volcaniclastics
Tectonic setting island arc
Stratigraphic age Pliocene

Commodity and development information

Development status Prospect
Major commodities Cu, Au, Mo
Tonnage (Mt) 2,940Mt
Cu grade (%) 0.52%
Mo grade (%) 0.006%
Au grade (g/t) 0.17g/t
Contained copper 15,000,000t
Gold-Moly ratio 30

Reference information

Comments Exposed. High-sulfidation epithermal system superimposed on a porphyry system. Located near intersections of faults that strike west-northwest and north-northeast. Sodaco exploration project, 900 m from Tampakan, within lithocap of advanced argillically altered volcanic rocks, considered as an extension of the Tampakan. Drilling 400 m south of the Sodaco project intercepted 158 m of 0.52 g/t gold and 0.41% copper.
Study area name East and Southeast Asia
References Middleton and others (2004); Mills (2007); Mitchell and Leach (1991); Rohrlach (2002); Rohrlach and others (1999); Singer and others (2008); WMC (1999); WMC (2000)
Site reference Hammarstrom and others (2014)
Middleton, C., Buenavista, A., Rohrlach, B., Gonzalez, J., Subang, L., and Molreno, G., 2004, A geological review of the Tampakan copper-gold deposit, Southern Mindanao, Philippines: PACRIM 2004, p. 172–187, accessed September 10, 2010, at http://www.indophil.com/pdf/Middleton.pdf.
Mills, R., 2007, Asia Pacific mining conference: The Northern Miner, July 16–22, p. 15.
Mitchell, A.H.G, and Leach, T.M., 1991, Epithermal gold in the Philippines—Island arc metallogenesis, geothermal systems and geology: London, Academic Press, 457 p.
Rohrlach, B.D., 2002, Tectonic evolution, petrochemistry, geochronology and paleohydrology of the Tampakan porphyry and high sulfidation epithermal Cu-Au deposit Mindanao, Philippines: Canberra, Australian National University, Ph.D. thesis, 499 p. and 23 appendixes.
Rohrlach, B.D., Madera, A., and Watt, R., 1999, Geology, alteration and mineralization of the Tampakan copper deposit, in Weber, Graeme, ed., PACRIM ‘99 Congress—International Congress on Earth Science, Exploration and Mining around the Pacific Rim, Bali, Indonesia, October 10–13, 1999, Proceedings: Carlton, Australia, Australasian Institute of Mining and Metallurgy Publication Series no. 4/99, p. 517–525.
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/.
WMC (Western Mining Corp.), 1999, Annual Report, 1999, Form 20-F, Exploration and new business: Western Mining Corp., p. 40, accessed June 15, 2009, at http://www.altavista.com/cgi-bin/query?pg=q&stype=stext&sc=on&q=Tampakan&stq=0. [Web page no longer available.]
WMC (Western Mining Corp.), 2000, WMC’s Tampakan copper project in the Philippines: Western Mining Corp. Information Paper no. 1, chap. 2, accessed June15, 2009, at http://www.wmc.com,au/pubpres/philippines/contents.htm. [Web page no longer available.]