摘要
对托素湖沉积岩芯采用高分辨率XRF扫描分析法进行地球化学元素测试,运用多元统计分析法中的相关性分析、聚类分析及因子分析判别出不同沉积组分,揭示了托素湖沉积物中Si、Al、K、Ti、Ca、Sr、S、Cl、Br等元素的地球化学特征及其所指示的环境意义。同属强烈迁移型元素Ca、Sr在沉积物中主要受托素湖中内生碳酸盐的影响;而外源碎屑元素Si、Al、K、Ti主要受托素湖流域侵蚀的控制,其变化受托素湖流域降水量的控制,一定程度上指示了流域的干湿波动和极端气候事件发生的幅度与频率。
The geochemical elements of Toson lake sediment core is tested by high-resolution XRF scanning method.Jointly using the correlation analysis of multivariate statistical analysis,cluster analysis and factor analysis the different sedimentary components were distinguished,and the geochemical and environmental significance indicated by elements Si,Al,K,Ti Ca,Sr,S,Cl,Br in Toson lake sediments revealed.The same type of a strong migration of Ca,Sr elements are mainly effected by the endogenous calcium carbonate in the Toson lake sediments.While exogenous detrital elements Si,Al,K,Ti are mainly controlled by lake watershed erosion,the element contents to further reflect the prime precipitation,to some extent,indicate the fluctuating characteristics of dry/wet climate,and the amplitude and frequancy of extreme weather events happened in Toson lake region.
出处
《盐湖研究》
CSCD
2011年第1期20-25,共6页
Journal of Salt Lake Research
基金
国家自然科学基金资助项目(40571173
40871008)
兰州大学西部环境教育部重点实验室共同资助
关键词
托素湖
元素地球化学
多元统计分析
环境意义
Toson Lake
Element geochemical
Multivariate statistical method
Environmental significance
