青海黑海湖泊沉积岩芯元素地球化学特征

Chemical elements in sediments of Heihai lake,Qinghai province

青海黑海湖泊位于东昆仑山北部的内流湖区,湖泊沉积物可直接反映流域内环境变化。对该湖泊158cm的沉积岩芯采用XRF扫描分析方法进行地球化学元素测试,运用多元统计分析方法对其进行相关性分析,并运用主成分分析得出影响沉积物化学组成的三个主要因子,结果表明流域侵蚀因子起决定作用,其次是湖泊内生碳酸钙沉淀因子及湖内蒸发盐沉淀因子。其组成主要受湖盆流域内气候冷暖控制。

Heihai Lake is inland lake which is located in the north of East Kunlun mountains,in Qinghai province.The bulk sediment samples can directly reflect paleo climate/paleo environment changes in the catchment.The geochemical elements of Heihai Lake sediment core is tested by XRF scanning method.Using the correlation analysis and factor analysis of multivariate statistics to identify the three factors controlling chemical composition of sediments.And catchment erosion plays the major role.The element contents further reflect the changes of temperature of climate.