Environment Evolution and Salt Forming Process of Jilantai Salt Lake since 22ka BP
Environment Evolution and Salt Forming Process of Jilantai Salt Lake since 22ka BP
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发表时间：
2009
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通讯作者：
Hu Dong-sheng
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作者：
Hu Dong-sheng
根据研究区及邻区的第四纪地质调查、沉积特征记录和一些综合分析，运用层序地层学分析方法，对吉兰泰盐湖22 ka BP以来的环境变化过程进行了探索性分析，盐湖演化经历了6个阶段：冷干期（22.0~ 14.0kaBP），淡水湖期;冷湿期（14.0~ 9.782kaBP），干燥木期;暖湿期（9.782~ 7.0kaBP）为咸水期;气候由暖湿转为干燥的时期（7.0~ 6.0kaBP）为静水期，也是成盐的准备阶段;冷干期（6.0~ 4.7kaBP），气候干湿交替频繁，为咸水期，也是盐湖成盐发育期;凉干期（4.7kaBP ~）为活跃成盐期，湖水迅速减少，周边沙漠不断侵蚀，逐渐向沙盖湖发展，22 kaBP以来吉兰泰地区的环境变化和气候转型是对全球古气候变化的响应。对研究盐资源形成事件和区域经济可持续发展具有重要意义。
According to quaternary geological investigation,sedimentary characteristic records and some comprehensive analysis of the study area and its adjacent areas,we take an exploratory analysis on the environment changing processes of Jilantai Salt Lake since 22 ka BP by using the analysis method of Sequence Stratigraphy.The evolution of the salt lake has experienced six stages: cold-dry period(22.0~14.0 ka BP),freshwater lake period;cold-wet period(14.0~9.782 ka BP),Dryas period;warm-wet period(9.782~7.0 ka BP),saline water period;period of climate changing from warm-wet to dry(7.0~6.0 ka BP),still saline water period,also the preparatory stage for the salt formation of the lake;cold-dry period(6.0~4.7 ka BP),the climate alternating between wet and dry frequently,salt water period,also the salt formation developing period of the salt lake;cool-dry period(4.7 ka BP~),it was the animated salt forming period,during which the lake water decreased rapidly and the around desert encroached,so the lake developed to sand covered lake gradually.The environmental change and climate transition in Jilantai area since 22 ka BP are responses to the global paleoclimate change,which have great significance in researches of salt resources formation events and the sustainable development of regional economy.