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Nancha Au deposit, Tonghua Co., Tonghua Prefecture, Jilin Province (Manchuria; Dongbei Region), China

Latitude: 41°40'5"N
Longitude: 126°20'5"E
Medium-scale shear zone and quartz vein type gold deposit. Deposit minerals vary from disseminated and fine veined to brecciated and banded. Their textures are idiomorphic, hypidiomorphic-xenomorphic and metasomatic replacement. Three zones occur, from SW to NE: (1) the main deposit in the first zone occurs in a structurally altered zone between basal schist, quartzite and marble of the Huashan Formation and an upper, thick dolomititic marble of the Zhenzhumeng Formation; (2,3) deposits in the second and third zones occur in a structurally altered zone in thick dolomitic marble of the Zhenzhumen Formation. The zones vary from stratiform to lenticular, and single zones may range from several tens to a hundred meters long. Wide-spread carbonate and silica alteration is associated with the deposit. Other important alterations are arsenopyrite and pyrite.

Mineral List

Arsenopyrite
Bornite
Chalcocite
Chalcopyrite
Dolomite
Galena
Gold
Magnetite
Pyrite
Pyrrhotite
Sphalerite


11 entries listed. 11 valid minerals.

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Copyright © Jolyon Ralph and Ida Chau 1993-2011. Jobs in China Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 28th Jun 2011 05:48:09
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