山东农业科学Issue(6)：75-82,8.DOI:10.14083/j.issn.1001-4942.2015.06.019
丹江一级阶地沉积地层光释光测年研究
Study on OSL Dating of Sediment Stratigraphy on the First River Terrace in Danjiang River Valley
摘要
Abstract
The extensive and careful fieldwork was carried out on the first river terrace in Danjiang River valley.The typical loess -paleosol sedimentary sequence in Chafang Village of Danfeng County from top to bottom was as follows:surface soil layer (TS )-loess layer (L0 )-weak paleosol layer (S0 -upper)-loess lay-er (Lx )-paleosol layer (S0 -lower)-transitional loess layer (Lt )-Malan loess layer (L1 )-alluvial flat faci-es sand gravel layer (T1 -al ).The quartz grains of 90 ~125 μm was choosed to detect the stratigraphic age by single aliquot regeneration (SAR)of OSL dating technique.The sedimentary sequences from bottom to top were as follow.The upper limit was S0 -lower of 6.16 ±0.12 ka,Lx of 5.86 ±0.14 ka,S0 -lower of 4.83 ± 0.12 ~2.51 ±0.17 ka,L0 of 1.94 ±0.07 ka.Combined with the physical and chemical data,the analysis results showed that at Holocene Megathermal period (6.16 ka),the climate was warm and moist with good developement soil and density vegetation in the south of Qinling Moutain.Around 5.86 ±0.14 ka,the climate was arid and cold and the typical loess was developed.At 4.83 ±0.12 ka,the climate was warm and moist and the weak paleosol was developed.From 1.94 ka,the climate was arid and cold and the loess was devel-oped.The paleosol layer developed about 2.5 ka,which was later than the ending deadline of Holocene Megathermal period of around 3 ka in the Loess Plateau.The cold event of 5.86 ka was one of the rapid cool-ing climate event and regional response of climate fluctuate.关键词
丹江/一级阶地/光释光年龄/气候变化Key words
Danjiang River/First terrace/OSL age/Climatic change分类
天文与地球科学引用本文复制引用
王蕾彬,周亚利,庞奖励,黄春长,査小春,高鹏坤..丹江一级阶地沉积地层光释光测年研究[J].山东农业科学,2015,(6):75-82,8.基金项目
国家自然科学基金项目（41371029，41271108，41030637）；中国博士后科学基金项目 （）
