Bentou (Benti; Sanbaqi) U deposit (U deposit No. 387), Lanshan Co., Yongzhou Prefecture, Hunan Province, China

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Paleokarst-hosted hydrothermal superimposition and transformation type uranium deposit, occurring in Lower Carboniferous limestone. Mineralization is located in cavities and fault-breccias formed by dissolution of carbonates. Four episodes of karst formation are recognized: late Triassic-early Jurassic, late Jurassic-early Cretaceous, Cretaceous-Tertiary and Recent. Field relations indicate that the main uranium mineralization is related to the second karst episode.


NOTE: In Chinese, "Sanbaqi" means "387".

References

- Liu, L. (1985): A discussion on the genesis of the Sanbaqi Diwa-type paleokarst uranium deposit no. 387. Uranium Geology 1(6), 1-10 (in Chinese).
- Maozhong Min and Junqi Wu (1992): Stable isotope studies of paleokarst-hosted uranium deposits in China. Geochemical Journal 32(2), 103-115.
- Maozhong Min and Xiangyun Wang (1994): Geological and geochemical environment of forming antimonselite, a new mineral. Journal of Mineralogy and Petrology 15(2).
- Maozhong Min, Deren Li, Nicheng Shi, Quanlin Liu, and Yawen Cao (1995): Some new data on antimonselite. Acta Mineralogica Sinica 15(3), 303-304 (in Chinese with English abstract).
- Maozhong Min, Xiangyun Wang, Baopei Shen, Guangdou Wen, and Tao Fan (1995): A new genetic understanding of a high-tonnage uranium deposit in South China. Geotectonica et Metallogenia 19(2).
- Min, M., Zheng, D., Shen, B., Wen, G., Wang, X., and Gandhi, S.S. (1997): Genesis of the Sanbaqi deposit: a paleokarst-hosted uranium deposit in China. Mineralium Deposita 32(5), 505-519.
- Dahlkamp, F.J., Ed. (2009): Uranium Deposits of the World. Springer (Berlin, Heidelberg), pp. 31-156.

Mineral List

Antimonselite Calcite Chalcopyrite 'Chlorite Group' Coffinite Dolomite Fluorite

Galena Hematite 'Hydromuscovite' Marcasite Millerite Molybdenite Muscovite var: Damourite

Nickeline Orpiment Pentlandite Pyrite var: Bravoite Quartz var: Chalcedony

Sphalerite Stibnite Ullmannite Uraninite var: Pitchblende Violarite

26 entries listed. 20 valid minerals.