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

Names and other identifiers

Alternate names Mofancun, Yanyuan
Tract name Dali (142pCu8711)
Site status deposit

Geographic location

Country China
State or province Yunnan
Geographic location 101.017466, 27.490629
Geologic map unit 101.017466, 27.490629
Nearby data

Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Au
Age (Ma) 32Ma
Age determination method Re-Os molybdenite
Age range 32.1 ±1.6 Ma
Age reference Hou and others (2006); Zeng and others (2006)
Minerals actinolite, albite, biotite, bornite, chalcocite, chalcopyrite, chlorite, epidote, galena, gold, hornblende, magnetite, molybdenite, pyrite, sericite, zinccopperite [Cu7Zn4]
Associated rocks quartz monzonite, granite, sandstone, siltstone, mudstone, shoshonite, hi-K calc-alkaline
Tectonic setting postconvergence
Stratigraphic age Oligocene

Commodity and development information

Development status Prospect
Major commodities Cu, Au
Trace commodities Mo
Tonnage (Mt) 64Mt
Cu grade (%) 0.28%
Au grade (g/t) 0.31g/t
Contained copper 180,000t
Gold-Moly ratio -9999

Reference information

Comments Ailoshan-Red River magmatic belt; discovered prior to 1996; Minco Gold had JV, but abandoned in 1998. Alkaline rocks present. Development.
Study area name Tibetan Plateau
References Hou and others (2006); Chen and others (1999); Hou, Ma and others (2003); Li and others (2003); Mindat.org (2007c); Rui, Wang and Wang (2002b); Tang and Luo (1995); Singer and others (2008); Zeng and others (2006)
Site reference Ludington, Hammarstrom, and others (2012)
Chen, Peirong; Wang, Rucheng; Chen, Xiaoming; and Xu, Shijin, 1999, Fluid inclusion evidence for high copper content of ore-forming fluid for Xifanping porphyry copper deposit, Sichuan province, China [abs.]: V.M. Goldschmidt Conference, 9th, Cambridge, Mass., August 22–27, 1999, Abstract 7285. (Also available at http://www.lpi.usra.edu/meetings/gold99/pdf/7285.pdf.)Hou, Zengqian; Zeng, Pusheng; Gao, Yongfeng; Du, Andao; and Fu, Deming, 2006, Himalayan Cu-Mo-Au mineralization in the eastern Indo-Asian collision zone—Constraints from Re-Os dating of molybdenite: Mineralium Deposita, v. 41, p. 33–45. (Also available at http://dx.doi.org/10.1007/s00126-005-0038-2.)Hou Zengqian, Ma Hongwen, Khin Zaw, Zhang Yuquan, Wang Mingjie, Wang Zeng, Pan Guitang, and Tang Renli, 2003, The Himalayan Yulong porphyry copper belt—Product of large-scale strike-slip faulting in eastern Tibet: Economic Geology, v. 98, p. 125–145. (Also available at http://dx.doi.org/10.2113/gsecongeo.98.1.125.)Li, Zeqin; Wang, Jiangzhen; and Wang, Jingya, 2003, New genetic model for porphyry copper deposit [abs.], in Goldschmidt Conference, 13th, Kurashiki, Japan, 2003, Proceedings: Goldschmidt Conference Abstracts, p. A252. (Also available at http://goldschmidtabstracts.info/2003/252.pdf.)Mindat.org, 2007c, Xifanping Cu-Au deposit, Yanyuan Co., Liangshan autonomous prefecture, Sichuan province, China: Mindat.org, Mindat database, accessed December 18, 2013, at http://www.mindat.org/locdetailed-5798.html.
Rui, Z., Wang, L., and Wang, Y., 2002b, Porphyry copper deposit models in China, in Workshop on Assessing Undiscovered Mineral Resources, Beijing, June 24–28, Proceedings: China Geological Survey and U.S. Geological Survey, p. 42–52.
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/.
Tang, Renli, and Luo, Huaisong, 1995, The geology of Yulong porphyry copper (molybdenum) ore belt, Xizang (Tibet): Beijing, Geological Publishing House, 320 p. [In Chinese.]
Zeng Pusheng, Hou Zengquian, Gao Yongfeng, and Du Andao, 2006, The Himalayan Cu-Mo-Au mineralization in the eastern Indo-Asian collision zone—Constraints from Re-Os dating of molybdenite: Geological Review, v. 52, p. 72–84. (Also available at http://en.cnki.com.cn/Article_en/CJFDTOTAL-DZLP200601013.htm.)