Central part of the Tongren-Fenghuang belt of mercury deposits, that straddles the border between Hunan and Guizhou provinces, from Xinhuang (Hunan) in the southeast to Tongren (Guizhou) and then to Chatian, Machong, and Fenghuang (all three of them in Hunan) in the northeast. This mercury-bearing zone is 150 km long and 5 to 10 km wide, and its measured reserves of mercury account for 50% of the total mercury reserves of China. The main mining areas in this belt include Jiudiantang, Xiangjiadi, Wanshan, Lengfengdong, Yanwuping, Yunchangping (Dadongla), Hepingzhen, Chatian and Houziping. Each of these mines has produced at least a few cinnabar crystals, but most of the crystals are very small (<0.5 mm). Nearly all of the larger and finer crystals have been found in the mines lying in the belt's central segment, most notably the Wanshan, Yanwuping, Yunchangping and Chatian mines. The first three of these lie within the area of Tongren Prefecture, Guizhou Province, while the Chatian mine lies in Fenghuang County, Hunan Province.
References
- Yongfeng Hua (1987): On the sedimentary genesis of mercury substance in the Wanshan mercury ore district. Mineral Deposits 6(3), 68-76.
- Guanghua Liu (2005): Chinese cinnabar. The Mineralogical Record 36(1), 69-80.
- Applied Geochemistry 23, 2055-2064.
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