西藏阿伊拉日居山南麓第四纪冰川沉积物及其ESR年龄测定  

Quaternary Glacial Deposits and Their ESR Dating Results on the South Slopes of the Ayilariju Mountains, Tibet Autonomous Region

作　　者：朱大岗[1] 孟宪刚[1] 邵兆刚[1] 杨朝斌[2] 韩建恩[1] 余佳[1] 杜建军[1] 孟庆伟[1] 

机构地区：[1]中国地质科学院地质力学研究所,北京100081 [2]西藏自治区国土资源厅,西藏拉萨850000

出　　处：《冰川冻土》2005年第2期194-198,共5页Journal of Glaciology and Geocryology

基　　金：中国地质调查局国土资源大调查项目"青藏高原第三纪重点古湖泊环境演变序列"(200313000066);"青藏高原生态地质环境遥感调查与监测"(200315100002)资助

摘　　要：在西藏札达盆地北缘阿伊拉日居山南北两麓及切割山脉的各沟谷中, 分布着4套第四纪冰川与冰水沉积物, 其冰川沉积物的电子自旋共振(ESR)测年结果分别为1 161～730 ka BP、 319～336 ka BP、 211 ka BP和105～15 ka BP. 测年结果表明, 在札达盆地北缘阿伊拉日居山南麓所发生的4次冰川作用, 其形成时期分别为早更新世晚期、中更新世中晚期、中更新世晚期和末次冰期.There are four sets of Quaternary glacial deposits along the south and north slopes and the valleys of the Ayilariju Mountains in north of Zhada basin, Tibet Autonomous Region. The ESR dating results of them are 1161～730 ka BP, 319～336 ka BP, 211 ka BP and 105～15 ka BP. These results show that the ages of the four sets of glacial deposits along the south slopes of the Ayilariju Mountains should correspond to the late epoch of the early Pleistocene, the middle and late epochs of the middle Pleistocene, the late epoch of the middle Pleistocene and the Last Glaciation in the southern Tibetan Plateau.

关 键 词：第四纪 冰川沉积 ESR测年 阿伊拉日居山 西藏 

分 类 号：P534.63[天文地球—第四纪地质学]