大别山东段晋宁期变质侵入岩特征及其构造演化  

FEATURES AND TECTONIC EVOLUTION OF THE JINNING PERIOD OF META-INTRUSIVE ROCKS IN THE EASTERN SECTION OF THE DABIE MT

作　　者：周存亭[1] 胡云琴[1] 

机构地区：[1]安徽省地质调查院,安徽合肥230001

出　　处：《安徽地质》2001年第3期161-169,共9页Geology of Anhui

摘　　要：晋宁期变质侵入岩是大别山造山带主体组成部分,从地质、地球化学及同位素年龄等方面阐述了其基本特征,源岩属壳幔重熔型钙碱性岩浆组合,受纬向伸展、经向挤压力控制剪切侵位,受加里东期、印支期、燕山期三期强烈改造,以大型穹状、隆滑韧性剪切带为特征,提出了非深俯冲板块构造演化基本思路。The Jinning period of meta- intrusive rocks are the major component of the Dabieshan orogen, whose basic features are described in the aspects of geology, geochemistry and isotopic age. Their source rocks belong to crust- mantle remelting type calc- alkaline magmatic association, which was under the control of longitudinal compression and latitudinal extension sheared and emplaced, then subjected to three stages of intense reworking of the Caledonian, Indosinian and Yenshanian to form the characteristic large domal uplift gliding ductile shear zone . So an idea of non-deep subduction plate tectonic evolution takes form.

关 键 词：同住素年龄 穹状隆滑构造 晋宁期变质侵入体 

分 类 号：P588.12[天文地球—岩石学]