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Porphyry copper (Cu-Au) deposit in Qinghai, China

Names and other identifiers

GMRAP ID 462
Tract name Qinling-Dabie (142pCu8701)
Site status deposit

Geographic location

Country China
State or province Qinghai
Geographic location 99.7906, 35.3101
Geologic map unit 99.7906, 35.3101
Nearby data
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Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Au
Age (Ma) 226Ma
Age determination method K-Ar
Age range 226 Ma
Age reference Wu and others (2010)
Minerals arsenopyrite, bornite, chalcopyrite, galena, pyrite, pyrrhotite, sphalerite, tetrahedrite
Associated rocks quartz diorite, diorite porphyry, granodiorite porphyry, tonalite porphyry
Tectonic setting continental margin
Stratigraphic age Late Triassic

Commodity and development information

Development status Producer
Major commodities Cu, Au, Ag
Minor commodities Pb, Zn
Tonnage (Mt) 128Mt
Cu grade (%) 1.13%
Au grade (g/t) 0.48g/t
Contained copper 1,450,000t
Gold-Moly ratio -9999

Reference information

Comments Grade of 0.1–0.4% Cu in porphyry part. updated tonnage per China Nonferrous Metals news on internet. Skarn-related.
Study area name Central Asian Orogenic Belt
References Encyclopedia of the Nations ( 2005?); Zhao and Lin (1993); Wu and others (2010); Singer and others (2008)
Site reference Mihalasky, Ludington, Hammarstrom, and others (2015)
Encyclopedia of the Nations, [2005?], China - Mining: Encyclopedia of the Nations Web page accessed September 12, 2011, at http://www.nationsencyclopedia.com/Asia-and-Oceania/China-MINING.html.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/.Wu JianHui, Feng ChengYou, Zhang DeQuan, Li JinWen, and She HongQuan, 2010, Geology of porphyry and skarn type copper polymetallic deposits in southern margin of Qaidam basin: Mineral Deposits, v. 29, no. 5, p. 760–774. [In Chinese, English abstract.] (Abstract also available at http://en.cnki.com.cn/Article_en/CJFDTotal-KCDZ201005003.htm.)
Zhao, Yiming, and Lin, Wenwei, 1993, The main geological features of copper skarn deposits in China, in International Geological Congress, 29th, Kyoto, August 24–September 3, 1992, Mineral Resources Symposia Volume A: Tokyo, Resource Geology Special Issue, no. 15, p. 225–230.