新疆巴里坤盐湖物质成分及湖体演化

新疆巴里坤盐湖是一个常年性固、液并存的硫酸盐型盐湖。盐湖卤水中含Ｎａ＋、Ｋ＋、Ｃａ２＋、Ｃｌ－、ＳＯ２－４、ＨＣＯ－３、ＣＯ２－３等主要成分，沉积物中有芒硝、无水芒硝、石膏、水钙芒硝、半水石膏、石盐等盐类矿物及碳酸盐和泥质矿物。盐湖中有大量卤虫及卤虫卵自湖中心向湖岸呈环带状分布，在成盐过程中起着重要作用。盐湖形成于第三纪，第四纪以来，曾经历２次成岩期，约自１７ｋａＢ．Ｐ．湖水多次蒸发浓缩，成岩作用加强，形成芒硝等矿产

SALINE COMPOSITION AND OVERALL EVOLUTION OF BALIKUN SALT LAKE IN XINJIANG

A sulfate type salt lake known for permanent co existence of solid and liquid sphases, Balikun lake contains Na +, K +, Ca 2+ , Cl -, SO 2- 4, HCO - 3 and CO 2- 3 in its lake water and mirabilite, thenardite, 1/2H 2O gypsum, halite,carbonate and clay minerals in its lake infills. In addition, there is plenty of saline shrimps with their ova which flourishingly reside from the centre of the waters outwards, palying a important role in the enrichment of the saline minerals. By the Quaternary period since its emergence in the Tertiaryone, the lake had been subjected to two diagenetic evolutions from 17ka ago,leading to accumulation of salt minerals like mirabilite through repeat evaporation and densification of the lake waters and increasing diagenesis.