| Features and Formation Mechanism of Faults and Potash-forming Effect in the Lop Nur Salt Lake, Xinjiang, China |
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| 作者姓名： | LIU Chenglin WANG Mili JIAO Pengcheng LI Shude and CHEN Yongzhi School of Environmental Sciences Peking University Beijing Institute of Mineral Resources Chinese Academy of Geological Sciences Beijing |
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| 作者单位： | LIU Chenglin1，2，*，WANG Mili2，JIAO Pengcheng2，LI Shude1 and CHEN Yongzhi2 1 School of Environmental Sciences，Peking University，Beijing 100871 2 Institute of Mineral Resources，Chinese Academy of Geological Sciences，Beijing 100037 |
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| 基金项目： | 中国地质调查局勘测项目 |
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| 摘 要： | 1 Introduction The Lop Nur Salt Lake, located in the eastern part of the Tarim Basin, Xinjiang, China, has become a playa in the Quaternary. It is under the jurisdiction of Ruoqiang County, Xinjiang, being ~450 km east of Korla City, the capital of the Bayingolin Mongolian Autonomous Prefecture (Fig. 1), and 300 km south of the seat of Shanshan County. The geographic coordinates are 90o00'–91o30' E and 39o40'– 41o20' N. Field survey and drilling since 1995 have revealed an occurren…
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| 关 键 词： | 碳酸钾 干盐湖 新疆 断层 |
| 收稿时间： | 2006-09-30 |
| 修稿时间： | 2006-10-26 |
Features and Formation Mechanism of Faults and Potash-forming Effect in the Lop Nur Salt Lake, Xinjiang, China |
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| Authors: | LIU Chenglin WANG Mili JIAO Pengcheng LI Shude and CHEN Yongzhi School of Environmental Sciences Peking University Beijing Institute of Mineral Resources Chinese Academy of Geological Sciences Beijing |
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| Abstract: | Abstract: The Lop Nur Salt Lake, located in the eastern part of the Tarim Basin, Xinjiang, China, has become a playa in the Quaternary. Rhombic in shape, the Lop Nur depression is mainly controlled by the NE‐striking and nearly N‐S‐striking sets of faults. Since 1995, a superlarge brine potash deposit with potash resources of 2.50times108t has been found in the Luobei subbasin in the northeastern part of the Lop Nur. We intensively studied the features and formation mechanism of faults inside the Lop Nur through satellite images, geomorphologic survey and continuous conductivity imaging and found seven subparallel graben faults formed under the action of nearly N 10° E principal compressional stress during deposition of the Lop Nur Salt Lake. These faults are up to >60 km long and 1–4 km wide and may extend downward for 1000 m or more. It is just under the action of these tensional faults that potash subbasins formed. The largest subbasin is the Luobei subbasin and the smaller ones are the Luoxi hollow, Erbei hollow and Tienan hollow. Investigation also indicates that the graben faults in the Lop Nur not only control the origin of the potash subbasins, but they themselves are also good brine reservoir structures, in which abundant potash‐rich brines are stored. Therefore, The faults had played an important role in the potash formation of the Lop Nur. |
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| Keywords: | Xinjiang Lop Nur salt lake fault potash formation |
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