Dipidio Group

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

Names and other identifiers

GMRAP ID 497
Alternate names Didipio, Dinkidi
Tract name Cordon Alkalic Complex (142pCu7302)
Included sites D 'Fox, True Blue
Site status deposit

Geographic location

Country Philippines
State or province Quirino
Geographic location 121.4531, 16.3308
Geologic map unit 121.4531, 16.3308
Nearby data

Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Au
Age (Ma) 24.8Ma
Age determination method U-Pb zircon
Age range 24.81 ±0.28 Ma, 24.79 ±0.22 Ma
Age reference Hollings and others (2011)
Minerals actinolite, biotite, Bi-sulfide, bornite, carbonate, chalcopyrite, chlorite, galena, gold, diopside, electrum, epidote, kaolinite, magnetite, molybdenite, pyrite, sericite, smectite, sphene, tellurides, zeolite
Associated rocks andesite porphyry, monzonite, quartz monzonite porphyry, syenite porphyry, gabbro, dacite, monzodiorite, andesite, breccia, dacite, diorite, gabbro, trachyandesite, volcaniclastics
Tectonic setting island arc
Stratigraphic age Oligocene

Commodity and development information

Development status Prospect
Major commodities Cu, Au
Tonnage (Mt) 101Mt
Cu grade (%) 0.36%
Au grade (g/t) 0.79g/t
Contained copper 360,000t
Gold-Moly ratio -9999

Reference information

Comments Measured, indicated and inferred resources as of July 29, 2011. 36 m of 0.4% Cu, 1.1 g/t Au and 84 m of 0.4% Cu and 1.0 g/t Au. May supply feed to Dipidio. True Blue Gold/Copper Project: exploration in the Dipidio area (35 prospects). Area near the Dipidio open pit has been extensively explored. Drilling at True Blue in 2006 identified a small intrusive stock. In 2011, reported as low-grade alkalic porphyry deposit 0.6 km from Dipidio; may provide mine feed to Dipidio.
Study area name East and Southeast Asia
References Climax Mining Ltd. (2010); Feebrey (2001); Garrett (1996); Haggman (1997); Hollings and others (2011); Kamenetsky and others (1999); Leach (1999); OceanaGold Corp. (2011); Wolfe and others (1999); Wolfe and others (2010); Singer and others (2008); van der Heyden and others (2008); Philippines Mines and Geosciences Bureau (2005)
Site reference Hammarstrom and others (2014)
Climax Mining Ltd., 2010, Dinkidi project: Climax Mining Ltd. Web page accessed July 22, 2010, at http://www.climaxmining.com.au/dinkidi_project.html.Feebrey, G.A., 2001, Exploration reviews—Asia, Philippines: SEG (Society of Economic Geologists) Newsletter, April, no. 45, p. 35. (Also available at http://www.segweb.org/pdf/publications/newsletters/2001/SEG-Newsletter-45-2001-April.pdf.)
Garrett, S., 1996, The geology and mineralization of the Dinkidi porphyry related Au-Cu deposit, in Porphyry related copper and gold deposits of the Asia Pacific region: Glenside, South Australia, Australian Mineral Foundation, Conference Proceedings, p. 6.0–6.15.
Haggman, J. A., 1997, Philippines exploration—Discovery of the Dinkidi gold-copper porphyry: Mining Engineering, p. 34–39.
Hollings, Pete, Wolfe, Rohan, Cooke, D.R., and Waters, P.J., 2011, Geochemistry of Tertiary igneous rocks of Northern Luzon, Philippines—Evidence for a back-arc setting for alkali porphyry copper-gold deposits and a case for slab roll-back?: EconomicGeology, v. 106, p. 1257–1277. (Also available at http://dx.doi.org/10.2113/econgeo.106.8.1257.)Kamenetsky, V.S., Wolfe, R.C., Eggins, S.M., Mernagh, T.P., and Bastrakov, Evgeniy, 1999, Volatile exsolution at the Dinkidi Cu-Au porphyry deposit, Philippines—A melt-inclusion record of the initial ore-forming process: Geology, v. 27, p. 691–694. (Abstract also available at http://geology.gsapubs.org/content/27/8/691.abstract.)
Leach, T.M., 1999, Evolution of selected porphyry copper-gold systems in the northwest Pacific region and its relevance to exploration, 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. 211–225.
OceanaGold Corp., 2010, OceanaGold Corp. home page: accessed September 26, 2010, at http://www.oceanagold.com/.OceanaGold Corp., 2011, Dipidio Group [Philippines]: Oceana Gold Corporation home page accessed May 15, 2011, at http://www.oceanagold.com/.
[Philippines] Mines and Geosciences Bureau, 2005, Copper: [Philippines] Mines and Geosciences Bureau Mineral Resource Information Series No. 5, 23 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/.
van der Heyden, A., Wyhe, J., and McIntyre, J., 2008, Independent technical report for the Dipidio gold-copper project: OceanaGold Corp. Web page accessed June 10, 2012, at www.oceanagold.com/assets/documents/.../080627ni43-101.pdf. [Web page no longer available.]
Wolfe, R.C., Cooke, D.R., and Joyce, P., 1999, Geology, mineralization and genesis of the alkaline Dinkidi Cu-Au porphyry, North Luzon, Philippines, 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. 509–516.
Wolfe, Rohan, Hollings, Peter, and Cooke, D.C., 2010, Mineralisation and geochemistry associated with the Dinkidi alkali Cu-Au porphyry, northern Luzon, Philippines: GeoCanada 2010—Working with the Earth, 4 p.