地幔交代作用研究综述  

GENERAL SURVEY OF RESEARCHES ON MANTLE METASOMATISM

作　　者：吴有林[1] 林舸[1] 范蔚茗[1] 张琴华[1] 

机构地区：[1]中国科学院长沙大地构造研究所,长沙410013

出　　处：《地质科技情报》1996年第2期35-39,共5页Geological Science and Technology Information

基　　金：国家自然科学基金资助项目(49252001)的部分成果

摘　　要：地幔交代现象广泛发现于各地的碱性玄武岩或金伯利岩中的地幔橄榄岩包体中。地幔交代作用以地幔岩包体中不相容元素的高度富集和(或)出现角闪石、金云母为标志。岩石学、地球化学、同位素资料等显示地幔交代作用与岩板俯冲及部分熔融作用之间存在密切联系。地幔组成、结构、演化与大陆构造演化之间存在紧密的关系。同位素模式年龄暗示地幔交代作用可能是大陆构造活动的深部原园。The phenomena of mantle metasomatism have been widely observed in the peridotite xenoliths which exist in the alkalic basalts or kimberlites in the world. Metasomatism is marked by high enrichment of incompatible elements and existence of amphibole and phlogopite. The data of petrology, geochemistry, isotope and so on, have implicated that there is a close link between metasomatism and subduetion and partial melting. And there is a close relation between the continental tectonic evolution and the composition, texture and evolution of the mantle. The isotopic model ages have indicated that mantle metasomatism may have been as an important deep cause of the continental tectonic action.

关 键 词：地幔交代作用 部分熔融作用 大陆构造演化 碱性玄武岩 同位素模式年龄 

分 类 号：P542.5[天文地球—构造地质学]