| 应用自然电场法寻找地下富钾卤水的探讨 |
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| 关键词:self-potential playa potassium-rieh brine Lop Nur |
| 基金项目:由国家305项目（编号：2001BA609A-07-15）;地质调查项目（编号：20001300105）;新闻优势矿产资源勘查评价项目（编号：2002102000517） |
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| Application of Self-Potential Technique to the Exploration of Potassium-Rich Brine in Lop Nur, Xinjiang |
| A large-sized brine potash deposit was recently discovered in Lop Nur, a large playa located in the east of Tarim basin, Xinjiang. In order to increase the reserves of potash resources of Lop Nur, the authors employed the self-potential technique to seek for and evaluate potassium-rich brine in sub-playas of Lop Nur. On the basis of geology, hydrogeology and brine chemistry of the playas in Lop Nur and in consideration of the low resistivity of potassium-rich brine, it is held that the self-potential technique is effective in seeking for potassium-rich brine in Lop Nur. In the brine-investigating area of Luobei depression in Lop Nur, the tentative survey was conducted by the self-potential means. The results show that the negative anomalies are distributed over the brine-bearing area, whereas the positive anomalies are spread over the piediment area. In Tienan depression of Lop Nur, the surveying results reveal the existence of a negative self-potential anomalous belt, which is 24 km long in S—N direction and 3～4 km wide in E—W direction, with the total area being some 100 km2. This belt is likely a potassium-rich brine area. It is thus concluded that the self-potential technique is a feasible and rapid method in seeking for and evaluating potassium-rich brine in playa areas. |
| JIAO Peng-cheng,LIU Cheng-lin,BAO Da-ming,WANG Mi-li,CHEN Yong-zhi.2005.Application of Self-Potential Technique to the Exploration of Potassium-Rich Brine in Lop Nur, Xinjiang[J].Acta Geoscientica Sinica,26(4):381-385. |
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