A New Metal Ore Karst Deposition Form - Case Study for Dolomite Residual Deposit in Dongxiang Copper Mine, Jiangxi Province, China

Abstract:

The Kcd (Karst colluvium and deluvium) deposit of Dongxiang copper mine had long been considered as a kind of ancient diluvium, alluvium and proluvium in Cretaceous Karst depression. Based on lithology and morphology analysis of Kcd, and further research for regional hydrogeology and hydrogeochemistry, it was considered as a new special Karst deposition form of metal ore in this project. In the oxidation zone of sulfide mineral deposit, Kcd was a deposition mixture of dolomite powder (sand) and eluvium of dolomite wall rock, which were generated by the action of sulfuric acid water on wall rock, and the collapse deposition from the overlying K₂n red beds. This kind of deposition was still generating and developing today. The monoclinal structure, primary sulfide mineral deposit occurred in clastic rock and claystone, dolomite and siliceous dolomite with 160m deep in underground water system, all that provided the development conditions of metal ore Karst deposition. This viewpoint could not only guide the copper ore exploration of Dongxiang type, but also provide a good case for Karst development in sulfide mineral areas.

• Periodical: Advanced Materials Research (Volumes 838-841)
• Pages: 1830-1835
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.838-841.1830
• Online since: November 2013
• Authors: Zhi Wei Yan*, Hui Li Liu, Zhi Gan Zhang, Shui Xin Li
• Keywords: Dolomite, Dongxiang, Karst Deposition, Metal Ore

References

[1] 911 geological team of Jiangxi Provincial Geological Bureau, institute of geology of ore deposits and research team in Dongxiang area of institute of geology. Geological report of Fenglin copper mine area in Dongxiang County, Jiangxi Prov. (In Chinese)[R]. 1982. 6.

[2] 912 geological team of Jiangxi Provincial Geological Bureau. Geology general check report of tungstun reserves and its outside copper deposits in Fenglin mine area of Dongxiang County, Jiangxi Prov. (In Chinese)[R]. 1983. 6.

[3] Yishun Lin. Suggestions of groundwater dynamics and unwatering projects in Dongxiang copper mine area (In Chinese)[R]. 1982. 6.

[4] Zhiwei Yan, Junfeng Zhang, Sujin Huang, et al. Carsologica Sinica (In Chinese), 2007, 26(2): 126-131.