Quantitative reconstruction of the paleosalinity in the Daihai Lake,Inner Mongolia,China  

作　　者：SHEN Ji Ryo Matsumoto WANG Sumin ZHU Yuxing 

机构地区：[1]Nanjing Institute of Geography&Limnology,Chinese Academy of Sciences,Nanjing 210008,China [2]Geology Institute,Tokyo University,Tokyo 113,Japan

出　　处：《Chinese Science Bulletin》2001年第1期73-77,共5页

基　　金：This work was supported bythe National Natural Science Foundation of China (Grant Nos. 49702028 and 49894170-04) ;and the Project of the Chinese Academy of Sciences (Grant No. KZCX1-Y-05).

摘　　要：Ostracods are small bivalved aquatic crustaceans. They secrete shells of low-Mg calcite that are often preserved in lake sediments. Recent work has shown that the uptake of trace elements (especially Mg and Sr) into the shell may be a function of the salinity and temperature of the host water. We measured Sr/Ca ratios in living ostracod valves from the species of genus Limnocythere cf. inopinata and Sr2+/Ca2+ ratios of the host water to calculate distribution coefficient of genus Limnocythere cf. inopinata in the Daihai Lake. A function for Sr2+/Ca2+ ratio and salinity was established by measuring a series of Sr2+/Ca2+ ratios and salinities of the lake water in different places of the Daihai Lake. Finally paleosalinities of the lake water were quantitatively reconstructed by the Sr/Ca ratios of ostracod shells of the same species in sediment core of the Daihai Lake.Ostracods are small bivalved aquatic crustaceans. They secrete shells of low-Mg calcite that are often preserved in lake sediments. Recent work has shown that the uptake of trace elements (especially Mg and Sr) into the shell may be a function of the salinity and temperature of the host water. We measured Sr/Ca ratios in living ostracod valves from the species of genusLimnocythere cf. inopinata and Sr2+/Ca2+ ratios of the host water to calculate distribution coefficient of genusLimnocythere cf. inopinata in the Daihai Lake. A function for Sr2+/Ca2+ ratio and salinity was established by measuring a series of Sr2+/Ca2+ ratios and salinities of the lake water in different places of the Daihai Lake. Finally paleosalinities of the lake water were quantitatively reconstructed by the Sr/Ca ratios of ostracod shells of the same species in sediment core of the Daihai Lake.

关 键 词：QUANTITATIVE RECONSTRUCTION PALEOSALINITY Daihai Lake. 

分 类 号：P512.32[天文地球—地质学]