内蒙古黄旗海不同粒级湖泊沉积物Rb、Sr组成与环境变化(英文)

编号 zgly0001586836

文献类型 期刊论文

文献题名 内蒙古黄旗海不同粒级湖泊沉积物Rb、Sr组成与环境变化(英文)

作者 陈磊  申洪源  贾玉连  吴敬禄  李徐生  魏灵  王朋岭 

作者单位 EnvironmentandTourismCollegeLinyiNormalUniversity  EnvironmentandTourismCollege  LinyiNormalUniversity  SchoolofGeographyandEnvironment  JiangxiNormalUniversity  NanjingInstituteofGeographyandLimnology  CAS  SchoolofGeographicand 

母体文献 Journal of Geographical Sciences 

年卷期 2008年03期

年份 2008 

分类号 P512.2 

关键词 InnerMongolia  HuangqihaiLake  Holocene  differentgrainsizefractions  lakesediment  Rb/Srratio  climaticchange 

文摘内容 Based on the geochemical elements Rb and Sr in sediments with three different grain size fractions from profile H3 on the northern lacustrine bottomland 13 m above the Huangqihai Lake surface in 1986,the paper investigates the record of palaeolake stand state, sedimentary environmental evolution,and winter monsoon change.First,these samples are separated into three different grain size fractions,i.e.,total sediments,77-20μm and<20μm. Second,the chemical elements-Rb and Sr-of the grain size separation were tested and analyzed systematically in this paper.Then the elements compositions of these samples are measured using VP-320 mode fluorescence spectrum instrument,respectively.The magnetic susceptibility of these samples is measured using Kappabridge KLY-3 mode instrument made in Czech AGICO Company.The results showed the elements and the ratios varied regularly with the grain size.But the ratio of Rb/Sr in the sediments<20μm correlates positively with the magnetic susceptibility of these samples.Therefore,the ratio of Rb/Sr in the fraction<20 μm from the lake sediments reflected the strengthening of the weathering in the deposition sites.It is a good indicator of the summer monsoon-induced weathering and pedogenesis fluctuations and can be used to reconstruct the conditions of the paleoclimate and paleoenvironment.