新疆玛纳斯河兴农湖沉积物特征反映的古环境探讨  

Analysis on the Sedimentary Environment of Xingnong Lake Section of Manas River

作　　者：史兴民[1] 李有利[2] 钱蟒[2] 

机构地区：[1]陕西师范大学旅游与环境学院 [2]北京大学环境学院,北京100871

出　　处：《干旱区资源与环境》2007年第9期62-67,共6页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金重大研究计划资助项目(90102016);陕西省教育厅自然科学基金资助项目(06JK165);咸阳师范学院重点项目(04xsyk104)联合资助

摘　　要：大量研究表明沉积物的粒度和粘土矿物可以作为研究环境演变的载体。玛纳斯河兴农湖剖面位于新疆维吾尔自治区克拉玛依市附近的一个农场内。本文分析了该剖面的粒度变化特点和粘土矿物的类型与含量变化。研究表明,兴农湖剖面以湖相沉积为主,位于古玛纳斯湖的边缘,是古玛纳斯湖的一部分。粘土矿物主要由伊利石、蒙皂石、高岭石和绿泥石组成。根据粒度和粘土矿物分析,将兴农湖沉积环境演变划分为9个阶段。A lot of research shows that the clay minerals and grain size of the sediments can be served as signs of the climate changes. The Manas River is the largest stream in the north margin of Tianshan Mountains. The Xingnong Lake section lies in a farm which is near Kelamai city in Xinjiang Uygur Autonomous Region. The clay mineral and grain size characteristics of Xingnong lake swamp sediments were measured. The result showed that the Xingnong Lake section can be contributed to lacustrine deposition and this region once was the part of the ancient Manas Lake. The main types of clay minerals are illite, smectite, kaolinite and chlorite. Based on the grain size and clay minerals types and contents, nine climatic stages were recognized.

关 键 词：玛纳斯河 粒度 粘土矿物 沉积环境 

分 类 号：P531[天文地球—古生物学与地层学]