| 应用自然电场法寻找地下富钾卤水的探讨 |
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| 引用本文：焦鹏程,刘成林,白大明,王弭力,陈永志.2005.应用自然电场法寻找地下富钾卤水的探讨[J].地球学报,26(4):381-385. |
| DOI：10.3975/cagsb.2005.04.16 |
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| 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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| 中文摘要:本文探讨自然电场法在盐湖区寻找和评价富钾卤水的应用及效果。根据罗布泊地质、本文地质和卤水化学特征研究，鉴于富钾卤水具有低电阻率的特点，论证了自然电场法在监测区找富钾卤水的地球物理机理和可行性。在罗北凹地已查明的富钾卤水区开展自然电场法测量方法试验，负异常对应干盐湖的卤水分布区，正异常主要分布于山前地区；应用于铁南凹地，自电负异常带南北长约24km、东西宽约3km，面积约100km^2，解译该带为高盐度卤水的富集地。结果表明，自然电场法可为盐湖区寻找和评价卤水钾矿提供一种新的、快速的技术手段。 |
| 中文关键词:自然电场 盐湖 富钾卤水 罗布泊 |
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| Application of Self-Potential Technique to the Exploration of Potassium-Rich Brine in Lop Nur, Xinjiang |
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| Abstract: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. |
| keywords:self-potential playa potassium-rieh brine Lop Nur |
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