凤凰山花岗岩体构造系统分析及侵位机制

刊出日期: 1996-04-28

TECTONIC SYSTEM ANALYSIS OF THE FENGHUANG SHAN INTRUSIVE AND ITS EMPLACEMENT

Publish Date: 28 April 1996

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。
- 凤凰山 /
- 岩体内部构造 /
- 接触带构造 /
- 侵位机制
Abstract: 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.
- Emplacement of the Fenghuangshan pluton /
- magnetic fabrics /