Discussions on Exposure Problems of Glacial Deposits before Buried——Based on the Ayizhisu Glacier in Pamir
详细信息
- 责任者：Zhou Shangzhe (School of Geographical Science ; South China Normal University ; Guangzhou 510631 ; China) ; Ou Xianjiao
- 刊名：Quaternary Sciences
- 出版年：2012
- 卷期：32(1)
- 关键词：光释光测年 ; optical stimulated luminescence dating ; 现代沉积 ; recent deposit ; 冰川沉积作用 ; glacial sedimentation ; 昆仑山 ; Kunlun Mountains
- 页码：p.39-45
- 图表：2 illus., 1 table, 39 refs.
- 分类号：1400
- issnNo：ISSN1001-7410
- isbnNo：CN11-2708/P
摘要
In this paper, the authors discuss the exposure possibilities of glacial deposit series during the processes of their production, transportation and deposition based on the observations and sedimentology. The till materials come from by three ways, i.e., the weathered debris from bedrock, the eroded debris by glacier ice and eolian deposit. Of which the eolian dust and a large portion of the weathered debris could be exposed to daylight,whereas glacial eroded debris could not. Among the three kind of glacial deposits, the glaciofluvial deposit can be completely exposed. For till deposit,supraglacial melt out till could be basically exposed, whereas lodgement till could not. For ice contact deposit, sand in kame could be completely exposed and esker could not.