Study on the Loess Layer in the South of Liaoning Province Using the Optically Stimulated Luminescence
详细信息
- 责任者：Zhang Wei (School of Urban and Environmental Sciences ; Liaoning Normal University ; Dalian 116029 ; China) ; Yu Yang
- 刊名：Earth and Environment
- 出版年：2013
- 卷期：41(2)
- 关键词：黄土类土 ; loessial soil ; 光释光测年 ; optical stimulated luminescence dating ; 辽宁 ; Liaoning Province
- 页码：p.117-125
- 图表：illus., 2 tables, 40 refs.
- 分类号：1400
- issnNo：ISSN1672-9250
- isbnNo：CN52-1139/P
摘要
According to the optically stimulated luminescence(OSL) dating method as well as the correlation with the OSL and TL dating results of the hill and plain regions in eastern China,the authors studied the typical Qidingshan loess profile.The results indicated that the time of the loess accumulation of Qidingshan was from the early stage of the middle Pleistocene,while the Malan loess accumulated since the 100～110 ka.During the last glacial cycle,the Malan loess was mainly deposited in the early and late stage of the last glacial cycle and the relative absolute OSL ages were 22～31 ka and 86～113 ka.There is about 40～50 ka loess layer absence in Qidingshan profile as possibly the higher temperature,plentiful precipitation and landforms.However,this phenomenon did not appear in the other sites in the southern of Liaoning province.The relative continually loess deposits show the loess accumulation affected not only by the climate but also by the geomorphology even in the same district.Moreover,the OSL dates reflect that the loess unusual accumulation in the south of Liaoning province.The reason may be that the quartz grains were influenced by the source of dust and transport distance.
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