新疆艾比湖沉积物的热释光年龄及其环境意义

TL age of lacustrine sediments from Aibi Lake of Xinjiang and its enviromental implication

应用热释光(TL)技术对新疆艾比湖进行了TL年龄测定。其结果表明新疆艾比湖区存在着大约以5000年为周期的湖退过程。全新世以来湖区存在着三次较大的气候环境演变:10—7kaB.P.气候干凉;7.5—2.5kaB.P.气候温暖湿润;2.5kaB.P.至今气候干凉偏旱。

Lacustrine deposits from Aibi Lake, Xinjiang have been dated by TL technique. The results suggest that the regression process of the lake has a period of about 5000 years and 3 climate stages occur sequently in the evolution process in Holocene, including the dry and cool stage of 10- 7 ka B.P., the moist and warm stage of 7.5- 2.5ka B.P. and the dry and cool stage since 2.5ka B.P.