Dongbeizhai Au-Ag-As-Hg deposit, Songpan Co., Ngawa (Aba) Autonomous Prefecture, Sichuan Province, China

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东北寨金银砷汞矿床, 松潘县, 阿坝藏族羌族自治州, 四川省, 中国

Carlin-like gold deposit, located at the intersection of regional NS- and EW-trending structural corridors within the Songpan-Ganzi basin. The deposit occurs along the footwall of the Kuashiya fault zone which separates Carboniferous to Lower Permian carbonate rocks from Middle Triassic black slate and other clastic rocks, and also contains lenses of hydrothermally altered mafic volcanic rocks of uncertain origin. The ore bodies, consisting of breccias anad cataclasites along the fault zone, are mainly hosted in silicified carbonaceous mudstone.

Dongbeizhai is the largest known gold deposit in Sichuan Province. Resources are estimated at 52t of Au.

Located about 25 km north of Songpan city.

References

- Zhiping Li, and S.G. Peters (1998): Comparative Geology and Geochemistry of Sedimentary-Rock-Hosted (Carlin-Type) Gold Deposits in the People's Republic of China and in Nevada, USA. USGS Open-File Report 98-466.
- Jingwen Mao, Yumin Qiu, Goldfarb, R.J., Zhaochong Zhang, Garwin, S., and Ren Fengshou (2002): Geology, distribution, and classification of gold deposits in the western Qinling belt, central China. Mineralium Deposita 37(3/4), 352-377.
- Hu Ruizhong, Su Wenchao, Bi Xianwu, Tu Guangzhi, and Hofstra, A.H. (2002): Geology and geochemistry of Carlin-type gold deposits in China. Mineralium Deposita 37(3/4), 378-392
- Gu, X.X., Liu, J.M., Schulz, O., Vavtar, F., and Zheng, M.H. (2002): Syngenetic origin for the sediment-hosted disseminated gold deposits in NW Sichuan, China: ore fabric evidence. Ore Geology Reviews 22, 91-116.
- Peters, S.G. (2002): Geology, Geochemistry and Geophysics of Sedimentary-Hosted Au Deposits in P.R. China. USGS Open-File Report 02-131.
- Khin Zaw, Peters, S.G., Cromie, P., Burrett, C., and Zengqian Hou (2007): Nature, diversity of deposit types and metallogenic relations of South China. Ore Geology Reviews 31(1-4), 3-47.

Mineral List

Albite Arsenic Arsenopyrite Calcite Chalcopyrite Cinnabar Dolomite var: Ferroan Dolomite

Famatinite Graphite Illite Kaolinite Marcasite Montmorillonite Muscovite var: Sericite

Orpiment Pyrite var: Arsenian Pyrite Pyrrhotite Quartz Realgar Scheelite

Sphalerite Stibnite Tennantite Tetrahedrite

25 entries listed. 22 valid minerals.