地幔捕虏体中的流体-熔体包裹体

Fluid-Melt Inclusions in Mantle Xenoliths

地幔流体的研究现已成为国内外前沿课题。地幔岩捕虏体中的流体 熔体包裹体是地幔流体的直接证据 ,通过对它们的研究可以直接获取地幔流体的信息。包裹体按相态特征主要有三类 :二氧化碳流体包裹体、二氧化碳 硅酸盐熔体包裹体、硫化物 熔体流体包裹体。本文总结了地幔岩中流体 熔体包裹体的基本特征、微量元素地球化学、硫化物 熔体包裹体和二氧化碳流体包裹体稳定同位素特征的研究进展状况。讨论认为 :地幔流体是由C、H、O、S等元素的挥发份和硅酸盐熔体组成 ;上地幔流体在化学成分上明显富含CO2 、硫化物、LILE和REE ,它引起地幔交代作用和地幔部分熔融 ;上地幔流体的分布存在不均匀性 。

WT5BZ]The research of mantle fluids has become a significant geological project. Fluid melt inclusions in mantle xenoliths bear the direct evidence of mantle fluids. We can obtain some information about mantle fluids by studying these inclusions. There are three typical fluid melting inclusions in mantle xenoliths, i.e., CO 2 fluid inclusions, CO 2 melt inclusions, and sulfide melt inclusions, according to observations in the past many years. In the paper, we summarize the advances in studies of the character of fluid melt inclusions, trace elements of inclusions, sulfide melt inclusions and the stable isotopic character of CO 2 fluid inclusions. We discuss and believe that mantle fluids are mainly composed of volatiles, sulfides, and silicate melt. Mantle fluids are apparently abundant in CO 2, sulfides, LILE and REE, and they cause mantle metasomatism and partial melt. Distribution mantle fluids of is inhomogeneous and their components are also different in zone. [WT5HZ]