地质学报2012，Vol.86Issue(4)：602-610,9.
稻城冰帽冰碛物光释光测年研究中遇到的问题及探讨
Problems and Analyses of Optically Stimulated Luminescence Studies of Glacial Deposits from Daocheng Ice Cap, Sichuan, China
摘要
Abstract
Glacier events are a direct geological indicator for climatic changes. Time sequence established using dating data of ice-borne sediments formed during glaciation process is an effective mean to inverse history of the glacial changes and regional paleoclimate and paleoenviroment. But complicated glacial deposition environment limits acquisition of glacial time to a large extent. In the recent years, with the development of Optically Stimulated Luminescence (OSL) dating method, it has been widely used in dating of glacial sediments. This study employed the OSL method to date the moraine sequences on the southern margin of the ancient ice-cap of Daocheng, Sichuan so as to establish time sequence of glacial events occurring in the Kuzhaori area. However, the OSL ages were not in accordance with previously reported ESR ages (Electron Spin Resonance) and 10Be exposure ages; in addition, some of the OSL dates do not agree with the relative geomorphologic and stratigraphic relationship of the moraines. The comparative study suggests that partial bleaching prior to burial and poor purity of the quartz may result in inaccuracy of the dating results, and enough attention should be paid on this issue.关键词
稻城冰帽/库照日/光释光测年/冰川/冰碛物/非正常衰减Key words
Daocheng ice cap/ Kuzhaori/ OSL/ glacier deposits/ anomalous fading引用本文复制引用
张志刚,王建,赖忠平,徐孝彬,白世彪,张茂恒..稻城冰帽冰碛物光释光测年研究中遇到的问题及探讨[J].地质学报,2012,86(4):602-610,9.基金项目
本文为国家自然科学基金项目(编号40572097)、江苏省优势学科项目、中国科学院百人计划项目(编号A0961)资助成果. （编号40572097）
