罗布泊全新世沉积特征及其环境意义GRAIN SIZE DISTRIBUTION CHARACTERISTICS AND CHANGES OF LOP-NUR LAKE SEDIMENTS DURING THE PAST 10000 YEARS
朱青,王富葆,曹琼英,夏训诚,李升峰,马春梅
摘要(Abstract)：
罗布泊西湖属开阔湖盆,上世纪30年代其面积达1900km2,但湖心剖面粒度分析的结果表明,其粒度组成与一般开阔湖盆有着显著的不同:沉积物常具黄色与灰色互层结构,层理清晰,黄色层的粒度组成中常含较多粗颗粒砂,灰与黄色层的混合样是以粉砂黏土为主,同时含有一定量的中、细砂,甚至粗砂。根据与风成砂和尘暴沉积的粒度组成对比,可知这种沉积特征与现代尘暴沉积有很大的相似性,因而表明风尘是罗布泊沉积的重要物源,并可据此来恢复10000a以来本区尘暴作用的强弱变化。
关键词(KeyWords)： 湖泊沉积;粒度分析;风成沉积;第四系;罗布泊;新疆
基金项目(Foundation): 国家自然科学基金(No.40701190);; 教育部博士点新教师基金(No.20070284067);; 中国科学院地球环境研究所开放测试基金
作者(Author): 朱青,王富葆,曹琼英,夏训诚,李升峰,马春梅
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