项目名称: 中国东部新生代幔源辉石岩包体的锂含量及其同位素组成
项目编号: No.41303021
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 天文学、地球科学
项目作者: 李佩
作者单位: 浙江大学
项目金额: 26万元
中文摘要: 本项目通过SIMS原位分析和MC-ICPMS全矿物分析相结合的手段来测定中国东部新生代幔源辉石岩包体中主要组成矿物相的锂含量及其同位素组成,分析并获得辉石岩地幔源区的锂含量及其同位素组成信息,并讨论辉石岩作为一个储库对地幔中锂不均一性和富锂地幔交代的影响,以及锂同位素体系作为识别玄武岩源区中辉石岩组分的可能性。
中文关键词: 辉石岩;锂同位素;含水性;再循环组分;
英文摘要: A combined MC-ICPMS and SIMS investigation of the major minearl phases in the mantle pyroxenites from East China is undertatken to measure lithium contents and isotopic compositions.The aims are to obtain and clarify Li and Li isotopic compositions of the mantle sources from which the pyroxenites of different origins were derived,and further to discuss the contribution of mantle pyroxenite as a distinct reservoir to Li and Li isotopic heterogeneities in the upper mantle and Li-rich mantle metasomatism, and the potential of Li isotopes to trace a pyroxenite componenent in the mantle sources of basalts.
英文关键词: pyroxenites;Li isotopes;water content;recycled components;