Bronze Fox

Porphyry copper prospect in Dornogovi, Mongolia

Names and other identifiers

Alternate names Khongoot, Khunguit, Hunguut, Bronze Fox District
Tract name Oyu Tolgoi (142pCu8506)
Included sites Sophie North, West Kasulu, Buchanan Heights, Dunlop Fox, Leca Pass, and Southeast Target
Site status prospect

Geographic location

Country Mongolia
State or province Dornogovi
Geographic location 107.8743, 44.0742
Geologic map unit 107.8743, 44.0742
Nearby data

Geologic information

Deposit type Porphyry copper
Age (Ma) 333.6Ma
Age determination method U-Pb zircon
Age range 333.6 ±0.6 Ma
Age reference Blight and others (2010)
Minerals azurite, bornite, chalcopyrite, covellite, cuprite, malachite, molybdenite, pyrite
Associated rocks monzodiorite, granodiorite, tonalite, diorite porphyry, lamprophyre
Tectonic setting island arc
Stratigraphic age Early Carboniferous

Commodity and development information

Development status Prospect
Major commodities Cu, Au
Minor commodities Mo, As
Gold-Moly ratio -9999

Reference information

Comments Exploration 1971–1977 by Soviet and Mongolian geologists indicated a preliminary resource of 39,000 t of Cu at a grade of 0.31%. Subsequent drilling (2005, 2010, 2011) has encountered similar grades. A 2004 Ivanhoe Mines investor information release uses different property names for this area. The names and locations of new owners Kincora Copper Ltd. are used here, but includes some geologic information from the 2004 Ivanhoe document. Associated with Bronze Fox intrusive complex, a weakly oxidized calc-alkaline I-type intrusive center; rocks range from granodiorite to monzonite. Mineralization is sheeted quartz-chalcopyrite (± arsenopyrite) veins.At least 48 holes (both RC and core) have been drilled on the property. Southeast target is located about 6 km SE of the main cluster of Bronze Fox targets (Sophie North, West Kasulu, Buchanan Heights, Dunlop Fox, Leca Pass) at 44.0394 N latitude and 107.9365 E longitude. There is an additonal target 20–25 km to the N–NE named North Fox which is also being investigated (no additional information available).
Study area name Central Asian Orogenic Belt
References Woodhouse and Bozada (2011); Nokleberg and others (1999); Nokleberg and others (2003); Nokleberg and others (2006); Dejidmaa and others (2002); Warren J. Nokleberg (written commun., 2006); Blight and others (2010); Ivanhoe Mines Ltd. (2004a); Kamitani and others (2007); Kincora Copper Ltd. (2012)
Site reference Mihalasky, Ludington, Hammarstrom, and others (2015)
Blight, J.H.S., Crowley, Q.C., Petterson, M.G., and Cunningham, Dickson, 2010, Granites of the southern Mongolia Carboniferous arc—New geochronological and goechemical constraints: Lithos, v. 116, p. 35–52. (Also available at
Dejidmaa, G., Bujinlkham, B., Ganbaatar, T., Oyuntuya, N., Enkhtuya, B., Eviihuu, A., and Monkh-Erdene, N., 2002, Distribution map of mineral deposits and occurrences in Mongolia: Ulaanbaatar, Mongolia Mineral Resources Authority, Geologic Information Center, 540 p., 12 sheets, scale 1:1,000,000.
Ivanhoe Mines Ltd., 2004a, Ivanhoe discovers important new gold-copper porphyry district in southern Mongolia—New porphyry district now named Bronze Fox: Ivanhoe Mines Ltd. press release, November 19, 2004, 7 p., accessed December 4, 2013, at, Masaharu; Okumura, Kimio; Teraoka, Yoji; Miyano, Sumiko; and Watanabe, Yasusi, 2007, Mineral deposit data of mineral resources map of east Asia, with explanatory notes: Japan Geological Survey, National Institute of Advanced Industrial Science and Technology, 19 p., 1 map on 2 sheets, scale 1:3,000,000, accessed April, 2011, at, and at Copper, 2012, Kincora Copper Limited announces that it has reached an agreement to acquire 100% of the outstanding shares in Golden Grouse LLC: Kincora Copper Ltd. press release, March 15, 2012, 1 p., accessed March 15, 2012, at, W.J., Naumova, V.V., Kuzmin, M.I., and Bounaeva, T.V., eds., 1999, Preliminary publications book 1 from project on mineral resources, metallogenesis, and tectonics of northeast Asia: U.S. Geological Survey Open-File Report 99-165, 6 p. and digital data, CD-ROM. (Also available at, W.J., Bounaeva, T.M., Miller, R.J., Seminskiy, Z.V., and Diggles, M.F. eds., 2003, Significant metalliferous and selected non-metalliferous lode deposits, and selected placer districts of northeast Asia: U.S. Geological Survey Open-File Report 03-220, 422 p., CD-ROM. (Also available at, W.J., Miller, R.J., and Diggles, M.F., eds., 2006, Geographic information systems (GIS) spatial data compilation of geodynamic, tectonic, metallogenic, mineral deposit, and geophysical maps and associated descriptive data for northeast Asia: U.S. Geological Survey Open-File Report 2006-1150, 11 p. and digital data, CD-ROM. (Also available at, Warren, and Bozada, Muzaffer, 2011, Bronze Fox project, Mandakh subprovince, Dornogobi province, Mongolia: Micromine Proprietary Ltd. National Instrument 43-101 Technical Report prepared for Brazilian Diamond Canadian Venture Exchange, [126] p., accessed February 18, 2012, at