摘要
伏牛山混合型花岗岩以斑状二长花岗岩为主体,年龄97—180 Ma。与之伴生的细粒黑云母花岗岩、角闪花岗岩、混合花岗岩和残留岩块都具有明显的同源地球化学特征,属于受古陆壳硅铝质混染的壳源花岗岩类。它由板块碰撞效应引起的递进花岗岩化作用形成,不同程度地继承了源岩的某些特性,说明了地质背景对该类岩石的控制作用。
The Funiushan migmatitic and granitization-type granitoids exposed in East Qinling consist mostly of porphyritic monzonitic granite with an age ranging from 97 to 180 Ma. The associated rocks include fine-grained granite, hornblende granite, migmatitic granite, and migmati-tic gneiss as residual blocks. The geology and geochemistry data available show that these granitoids are likely to be derived from the old continental crust as a result of contamination by earlier sialic materials. These rocks formed as a result of progressive granitizarion have, to a great extent, inherited some characteristics of the source rocks. Therefore, this batholith in East Qinling is quite different in geochemistry from others.
出处
《地球化学》
CAS
CSCD
北大核心
1990年第4期358-364,共7页
Geochimica
