凤凰山花岗岩体构造系统分析及侵位机制  

TECTONIC SYSTEM ANALYSIS OF THE FENGHUANG SHAN INTRUSIVE AND ITS EMPLACEMENT

作　　者：李东旭[1] 张达[1] 刘文灿[1] 杜子图[1] 

机构地区：[1]中国地质大学,中国地质科学院地质力学研究所

出　　处：《地质力学学报》1996年第2期55-65,共11页Journal of Geomechanics

基　　金：矿部地质力学开放研究实验室资助

摘　　要：本文从宏观上对凤凰山岩体的区域构造位置、岩体侵位前后的构造演化过程及岩浆侵位时的动力学条件进行了论述；对岩体内部及接触带的面理、线理进行了磁组构测量、显微构造观察、包体应变测量及Ｘ光组构分析等系统研究，最终获得如下结论：该岩体侵位除有膨胀作用外，在岩体侵位后期还有过旋转运动，而且岩体侵位受到ＮＮＥ向左旋剪切作用控制。In this paper,a discussing is made of the location of the Fenghuanshan pluton,in the regional tectonic regime,tectonic evolution before and after the emplacement and the dynamic conditions for the magma emplacement. The foliations and lineations both in the pluton and in the contact zone are systematically studied by measuring their magnetic fabrics,microstructures, strained inclusions and X-ray analysis of rock fabrics. As a result, it leads to the conclusion that there occurred not only dilatation due to the emplacement but also rotation of the intrusive in the late stage of the emplacement,which was controlled by the NNE sinistralshear.

关 键 词：花岗岩体 构造系统 侵位机制 花岗岩 

分 类 号：P588.121[天文地球—岩石学]