【摘要】 大量研究表明粘土矿物可以作为研究环境演变的载体。玛纳斯河蘑菇湖剖面位于新疆石河子市附近的一个砖厂内,本文利用x衍射法分析了该剖面的粘土矿物的类型与含量变化。这些粘土矿物主要由伊利石、蒙皂石、高岭石和绿泥石组成。对粘土矿物含量的变化分析和对比表明,玛纳斯河流域全新世气候演变可划分为4个阶段。即6．2～9．1 ka BP与1．8—3．6 ka BP为温暖湿润期,0～1．8 ka BP与3．6～6．2 ka BP为干冷期。更多还原

【Abstract】 A lot of research shows that the clay minerals 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 clay mineral char- acteristics of its lake swamp sediments indicate the variations of climate.Mogu Lake section lies in a brick field which is near Shihezi city in Xinjiang Uygur Autonomous Region.By analyses of the X-ray diffraction the contents of clay minerals of the Holocene sediments are measured.The result shows that the main types of clay minerals are illite,smectite,kaolinite and chlorite.The changes of the clay mineral composition show the climatic and environ- mental features of a dry temperate arid and semi-arid area.Based on the clay minerals types and contents,four cli- matic stage in Holocene are recognized,which are dry and cold stage (0～1.8 ka BP & 3.6～6.2 ka BP),warm and humid stage (6.2～9.1 ka BP & 1.8～3.6 ka BP).The study provides new data for the study of the climate change,paleogeographic change of the Manas river valley.更多还原