Lithium and sediment： the Martinique connection  

作　　者：Paul B. Tomascak 

机构地区：[1]Department of Atmospheric and Geological Sciences, State University of New York at Oswego, Oswego, NY 13126, USA

出　　处：《Science Bulletin》2015年第12期1136-1137,I0003,共3页科学通报（英文版）

摘　　要：Fractionation of the two stable isotopes of Li,the lightest metal in the cosmos,is very large in the earth system.Consequently,sedimentary systems and the hydrosphere have developed a variable and distinctive isotopic signature compared with the mantle,which appears veryFractionation of the two stable isotopes of Li, the lightest meta! in the cosmos, is very large in the earth system. Consequently, sedimentary systems and the hydrosphere have developed a variable and distinctive isotopic signature compared with the mantle, which appears very consistent in terms of Li isotopes. In short, most low-temperature- altered materials take on an isotopically heavy character relative to the mantle; for example, seawater is currently ca. 2.6 % enriched in 67Li compared with normal mantle rocks and mid-ocean ridge basalts.

关 键 词：锂同位素 沉积物 同位素分馏 连接 同位素特征 地幔岩 地球系统 沉积体系 

分 类 号：P736.41[天文地球—海洋地质] TQ131.11[天文地球—海洋科学]