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矿床地质  2003 

新疆罗布泊第四纪盐湖上升卤水流体及其成钾意义

Keywords: 地质学,盐湖,卤水流体,上升通道,罗布泊

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Abstract:

野外调查发现,新疆罗布泊罗北凹地等干盐湖地表分布有众多的流体上升或上涌通道,其形状特征呈“垂直的孔洞”、“泥火山口”、“枣状小坑”及“粘附沙丘”等。研究认为,地下卤水流体过去和现在正是通过这些通道上升,至地表排泄或进入盐湖水体及沉积物中;这些地下流体主要源于深部地层水和大气循环水等;上升流体补给罗布泊的罗北凹地等次级盐湖,为钾盐成矿提供重要的物质基础,并导致钙芒硝的大量沉积,促进了盐类沉积物的成岩过程。同时,上升流体的补给还在罗布泊盐湖区近地表处产生了固体钾盐矿的沉积。

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