地幔流体作用——地幔捕虏体中流体包裹体的研究  

FLUID INCLUSIONS IN MANTLE XENOLITHS: EVIDENCES FOR FLUID-INVOLVED MANTLE PROCESSES

作　　者：刘丛强[1] 苏根利[1] 李和平[1] 黄智龙[1] 

机构地区：[1]中国科学院地球化学研究所,贵州贵阳550002

出　　处：《地学前缘》2001年第3期83-93,共11页Earth Science Frontiers

基　　金：国家科学技术部攀登计划预选项目 ( 95 预 39) ;杰出青年基金项目 ( 4962 5 30 4)

摘　　要：被碱性玄武岩和金伯利岩带到地表的地幔捕虏体是认识地球深部信息的窗口 ,是人们能够直接观察到的一种上地幔样品 ,其矿物中流体包裹体的存在提供了上地幔流体活动的直接证据。流体 /地幔矿物之间元素的分配对约束地幔交代过程中流体相的作用和上地幔流体的组成 ,揭示俯冲带壳幔物质的再循环过程 ,解释岛弧玄武岩高场强元素亏损的原因有重要意义。文章对近年来有关地幔捕虏体中流体包裹体的研究进行了评述 ,并结合近年来流体 /地幔矿物之间元素分配的高温高压实验研究讨论了流体在地幔中的重要作用。Mantle-derived xenoliths and xenocrysts, which are transported to the Earth's surface by alkali basalts and kimberlites, represent a valuable window leading into the interior of the Earth and can provide direct information on the nature of lithospheric mantle and mantle processes. A large amount of fluid inclusion data has been acquired from ultramafic xenoliths from mantle-derived mafic rocks during the past decades. The fluid inclusion in mantle xenoliths records the history of processes involving mantle fluids. The element partitioning between fluid and mantle minerals is important to constrain the composition of mantle fluids and the nature of metasomatism. This article reviews the progresses in studies of fluid inclusions in mantle xenoliths, together with those in recent high p-T experimental researches on element partitioning between fluid and mantle minerals, and discusses the important roles of fluids in the Earth's mantle.

关 键 词：地幔捕虏体 流体包裹体 元素分配 元素迁移 碱性玄武岩 金伯利岩 

分 类 号：P542.5[天文地球—构造地质学] P595[天文地球—地质学]