Oyuut Uul

Porphyry copper prospect in Selenge, Mongolia

Names and other identifiers

Tract name Erdenet (142pCu8508a)
Site status prospect

Geographic location

Country Mongolia
State or province Selenge
Geographic location 106.1833, 49.6333
Geologic map unit 106.1833, 49.6333
Nearby data

Geologic information

Deposit type Porphyry copper
Age determination method Geologic inference
Age range ~290 Ma (Variscan orogeny)
Age reference geologic inference
Minerals azurite, chalcopyrite, malachite, molybdenite, pyrite, sphalerite
Tectonic setting continental margin
Stratigraphic age Early Permian

Commodity and development information

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

Reference information

Comments Samples contains up to 1.5–2.16% Cu and 0.006–0.2% Zn; soil samples reveal 4 anomalies: 0.01–0.02% Cu, ranging 4.7; 1.3; 0.6 and 3.8 sq. km. Consists of sulfide-bearing fault fractured, mylonitized and silica-altered zone in Permian volcanic rock. Host volcanic rock is white, contains pyrite and chalcopyrite disseminations and malachite and azurite coatings. Zone of silica replacement is oxidized. An IP anomaly occurs at the centre of the occurrence. Intensive pyrite alteration of andesite occurs at depth from 68.1–115.7 m. Silica and pyrite-altered zone also shows lower resistivity anomaly.
Study area name Central Asian Orogenic Belt
References Nokleberg and others (1999); Nokleberg and others (2003); Nokleberg and others (2006); Dejidmaa and others (2002); Sotnikov and others (1985); Purevsuren and others (written commun., 1986)
Site reference Mihalasky, Ludington, Hammarstrom, and others (2015)
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.
Nokleberg, 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 http://pubs.usgs.gov/of/1999/of99-165/.)Nokleberg, 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 http://pubs.usgs.gov/of/2003/of03-220/.)Nokleberg, 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 http://pubs.usgs.gov/of/2006/1150/.)
Sotnikov, V.I., Berzina, A.N., Zhamsran, M., Garamzhav, D., and Bold, D., 1985, Copper deposits of Mongolia: Novosibirsk, Nauka, Transactions of the Joint Soviet-Mongolian Scientific-Research Expedition, v. 43, 223 p.