| 新疆罗布泊第四纪盐湖上升卤水流体及其成钾意义 |
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| 引用本文：.2003.Ascending Brine Fluids in Quaternary Salty Lake of Lop Nur in Xinjiang and The ir Significance in Potash Formation [J].Mineral Deposits,22(4):386~392 |
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| 基金项目:地质调查项目(编号：200010300105)和国家“十五”科技攻关305项目专题(编号：2001BA609A_07_15) |
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| 中文摘要: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。 |
| 中文关键词:地质学 盐湖 卤水流体 上升通道 罗布泊 |
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| Ascending Brine Fluids in Quaternary Salty Lake of Lop Nur in Xinjiang and The ir Significance in Potash Formation |
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| Abstract:The Lop Nur salty lake is located in eastern Tarim basin of Xinjiang. At the end of the last century, a large_size brine potash deposit was found in Luobei depr ession, a sub_basin of the Lop Nur Lake. Lately, it has been discovered that lot s of fluid ascending conduits exist in Luobei depression and other sites. These conduits look like such bodies as vertical holes, mud craters, Chinese date_like small pits and sand_attached dunes. The authors hold that the underground brine fluids ascend just through these conduits, discharge at the surface and/or ente r lake water or sediments of the Lop Nur Lake. These fluids might originate from deep oilfield water or strata water and atmospheric cycling water. They enter t he sub_basins such as the Luobei depression and supply them with a great deal of potassium for the formation of the brine potash deposits. In addition, the addi tion of these fluids into the lake results in the deposition of enormous amounts of glauberite and stimulates the diagenetic changes of saline minerals_hosted sediments. Moreover, solid potash deposits have been formed at the surface of so me sites of Lop Nur. |
| keywords:geology, salty lake, brine fluid, ascending conduit, Lop Nur |
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