用OSL方法确定雅鲁藏布江大拐弯第四纪晚期冰川堰塞湖年龄  

The Age of Glacial Dammed Lakes in the Yarlung Zangbo River Grand Bend during Late Quaternary by OSL

作　　者：祝嵩[1] 吴珍汉[2] 赵希涛[3] 王成敏[4] 肖克炎[1] 

机构地区：[1]中国地质科学院矿产资源研究所,北京100037 [2]中国地质科学院,北京100037 [3]中国科学院地质与地球物理研究所,北京100029 [4]中国地质科学院水文地质环境地质研究所,河北石家庄050061

出　　处：《地球学报》2013年第2期246-250,共5页Acta Geoscientica Sinica

基　　金：中国地质调查局地质矿产调查评价专项(编号:1212011120185)资助

摘　　要：雅鲁藏布江是青藏高原上的一条大河,其河谷地貌和地质环境演化的发育历史对于青藏高原地质研究有重要意义。前人用ESR和14C测年方法对雅鲁藏布江河谷两岸广泛分布河湖相沉积物、冰碛物测年确定了有四期堰塞湖。作者用光释光(OSL,Opically Stimulated Luminesecence)测年方法分析采集到的湖相样品年龄为(50.9±2.1)kaBP和(1.8±0.1)kaBP,证明雅鲁藏布江大拐弯处末次冰期早冰阶和新冰期存在古堰塞湖。The Yarlung Zangbo River is a great river in the Tibetan Plateau, and the landform of river valley and geological evolution history of its development has an important significance for the study of the Tibetan Plateau geology. Previous researchers tested lacustrine sediments by ESR and 14C methods in the Yarlung Zangbo River valley and recognized four periods of dammed lakes. The authors analyzed lacustrine samples with OSL （Opically Stimulated Luminescence） and got the ages of （50.9± 2.1） ka BP and （1.8±0.1） ka BP. These data suggest that the Yarlung Zangbo Great Bend had two ancient dammed lakes existent respectively during the early stage of the last glacial period and the new glacial period.

关 键 词：雅鲁藏布江 堰塞湖 冰川 第四纪 OSL 

分 类 号：P343.6[天文地球—水文科学] P343.3[天文地球—地球物理学]