闽北建瓯大康闪长质杂岩的年代学及岩石地球化学研究  

STUDING ON GEOCHRONOLOGY AND LITHOGEOCHEMISTRY OF DAKANG DIORITE COMPLEX IN JIANOU,NORTHERN FUJIAN,CHINA

作　　者：任胜利[1] 

机构地区：[1]中国地质大学地矿系

出　　处：《矿物岩石》1997年第2期78-83,共6页Mineralogy and Petrology

基　　金：国家自然科学基金;博士后基金

摘　　要：系统的同位素年代学及岩石地球化学研究表明，大康闪长质杂岩体的成岩时代为４９８．２Ｍａ±１５．４Ｍａ，成岩物质来源于壳／幔混合熔融。Ｓｒ，Ｎｄ同位素地球化学的研究进一步表明，大康闪长质杂岩应为华南同熔型岩浆系列中的较基性端员。The Rb Sr isochronic age of Dakang dioritic complex is 498 Ma±15.4 Ma.From lithogeochemistry and isotopic geochemistry,it could be concluded that the complex is mixed melting products of depleted mantle and crust material.The characteristics of isotopic composition also indicate that the dioritic complex is basic member of syntectic magma series in South China,and it may be formed in a tectonic setting of subduction belt.

关 键 词：杂岩 闪长质杂岩 年代学 岩石地球化学 

分 类 号：P588.36[天文地球—岩石学]