胶东文登岩体—二长花岗质岩石地球化学特征及成因探讨  

GEOCHEMICAL FEATURES AND GENESIS OF THE WENDENG ADAMELLITIC ROCKBODY,EASTERN SHANDONG PROVINCE

作　　者：刘春华[1] 孙景贵[1] 郑常青[1] 

机构地区：[1]长春地质学院地球科学系

出　　处：《吉林地质》1995年第4期51-58,共8页Jilin Geology

摘　　要：文登岩体的主体位于胶东半岛文登市境内，出露面积约４５０Ｋｍ￣２，该岩体具有多阶段（期）侵位演化特征。早期由细粒二长花岗岩、含斑中粗粒二长花岗岩构成；晚期由斑状中粗粒二长花岗岩、巨斑状中粒二长花岗岩构成。早期岩浆源于上地壳部分熔融；晚期岩浆是早期岩浆发生以斜长石、黑云母为主的矿物相分离结晶作用形成。The Wendeng rockbody is located mainly Wendeng area,eastern Shandong peninsulawith its outcrop area of 450km￣2,exhibiting the characteristics of multi stage evolution. Theearly stage comprises fine grain adamellite and medium coarse grained porphyritic adamel-lite,while the late stage, it consists of medium grain adamellite with huge phenocryst.Thecorresponding magma of the early stage originated frorn partial melting of the Upper crust,but the late stage magma was derived from the early magma through fractional crystallizationof plagiolase and biotite.

关 键 词：中生代 二长花岗岩 岩体 地球化学 成因 

分 类 号：P588.121[天文地球—岩石学]