摘要
点苍山正片麻岩分为两类 :斜长片麻岩和花岗片麻岩。前者属岛弧火山岩 ,形成于早元古代 ;后者属同碰撞花岗岩 ,形成于中晚元古代。二者主要化学组分具相关性 ,花岗片麻岩是由早形成的斜长片麻岩、斜长角闪岩经深熔作用而成。
The orthogneiss of Diancang Mountain can be divided into 2 types, ie plagiogneiss and granogneiss. The former belongs to an island arc volcanic rock and was formed in early Proterozoic whereas the latter is a collision granite and formed in middle late Proterozoic, which are correlated in the main chemical composition. The granogneiss is formed by the anatexis of the earlier plagiogneiss and plagioclase amphibolite.
出处
《云南地质》
2001年第3期260-269,共10页
Yunnan Geology
