| 罗布泊盐湖化学沉积序列及其控制因素 |
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| 引用本文：刘成林,马黎春,焦鹏程,孙小虹,陈永志.2010.Chemical sedimentary sequence of Lop Nur salt lake in Xinjiang and its controlling factors[J].Mineral Deposits,29(4):625~630 |
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| 基金项目:本文得到国家自然科学基金重点项目(编号40830420)资助 |
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| 中文摘要:罗布泊位于塔里木盆地的东部，是世界最大的第四纪干盐湖之一。罗布泊盐湖化学沉积序列总体简单，即为石膏—钙芒硝（巨厚）—石盐（很薄），但细节变化则很复杂，在钙芒硝阶段和石盐阶段出现了很多含钾盐矿物的薄层，按时代从老到新，可划分出9个区段。罗布泊化学沉积序列除了与江汉盆地第三纪古盐湖有一定的相似性之外，与其他陆相、非海相和海相蒸发沉积序列有明显的差异，这可能与该地区的气候变化、物源背景及构造环境等有关。这种特殊的化学沉积序列应该是全球气候变化与大地构造运动在盐湖沉积中的响应，气候持续干化与补给变化的耦合，是造成罗布泊盐湖特殊的化学沉积序列的机制。 |
| 中文关键词:地球化学 盐湖 化学沉积 沉积序列 析盐序列 罗布泊 新疆 |
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| Chemical sedimentary sequence of Lop Nur salt lake in Xinjiang and its controlling factors |
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| Abstract:Located in the eastern part of the Tarim Basin, Lop Nur Lake is one of the largest playa lakes in the world. Although the overall chemical sedimentary sequence of the salt lake appears quite simple, represented by gypsum-glauberite (very thick)-halite (rather thin), the detailed variation of the sequence is rather complex and can be divided into nine zones according to ages of the strata. The chemical sequence of Lop Nur salt lake is remarkably different from many non-marine and marine chemical sedimentary sequences except for that of Tertiary paleo-salt lake in Jianghan Basin, Hubei Province, which shows some similarity with the sedimentary sequence of Lop Nur salt lake. The differences are probably related to such factors as regional climate, substance sources and tectonic environments. This special chemical sequence should have been the response to global climate changes and tectonic movements. Therefore, the coupling of continuous drying and supply variation might have been responsible for the formation of the special and complex chemical sedimentary sequence in Lop Nur salt lake. |
| keywords:geochemistry, salt lake, chemical sedimentation, sedimentary sequence, salt_separating sequence, Lop Nur, Xinjiang |
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