摘要
白音吉日嘎拉地区侵入岩主要为碱长花岗岩、黑云母二长花岗岩、正长斑岩、石英正长斑岩、花岗斑岩。本文对各侵入岩分布特征进行初步分析,以碱长花岗岩为例,探讨其形成环境及侵位特征,认为该区碱长花岗岩至少存在两期活动,并且时间间隔较短。黑云母二长花岗岩和碱长花岗岩均为后碰撞环境的产物。
Intrusive rocks in the area of Baiyinjirigala are mainly composed of alkali feldspar granite, biotite adamellite, syenite porphyry, quartz syenite porphyry and granite porphyry. In this paper, we studied the distribution characteristics of Intrusive rocks. As an example, we investigated the formation environment and emplacement characteristics of alkali feldspar granite. The results showed that feldspar granite was formed after experiencing magmatic activity twice at least with short interval. The biotite, adamellite and alkali feldspar granite were all the results of the post collision.
出处
《甘肃冶金》
2015年第2期97-100,103,共5页
Gansu Metallurgy
关键词
侵入岩
白音吉日嘎拉
内蒙古
intrusive rocks
Baiyinjirigala
Inner Mongolia
