豫南熊店高压变质岩的pttD轨迹  

The pttD Path of High-Pressure Metamorphic Rocks of Xiongdian, Southern Henan

作　　者：张泽明[1] 韦必则[2] 韩郁菁[2] 游振东[2] 

机构地区：[1]中国地质科学院地质研究所 [2]中国地质大学地球科学学院

出　　处：《地球学报（中国地质科学院院报）》1998年第3期233-237,共5页Acta Geoscientia Sinica

基　　金：国家自然科学基金

摘　　要：豫南熊店高压变质岩块体经历了６期变形和变质作用，即从深地壳层次挤压缩短体制下的不均匀韧性剪切、榴辉岩进变质作用，到中地壳层次挤压体制下的逆冲推覆、钠长绿帘角闪岩相退变质作用，到地壳浅层伸展体制下的脆性—韧性滑脱、绿片岩相变质作用，以及更浅层次的脆性变形，动力变质作用。高压变质岩的形成与向地壳中、浅层次的大幅度抬升均是在挤压机制下韧性变形作用的结果，而高压变质岩暴露到地表是伸展滑脱、断块升降和差异抬升所致。The high-pressure metamorphic rock block of Xiongdian,Southern Henan,have been experienced 6 stages of deformation and metamorphism.They are from the ductile shear deformation and eclogite facies metamorphism under the compression dynamic mechanism at the lower crustal level,through the thrust nappe and epidote amphibolite facies metamorphism under a continuous compression mechanism at the medium crustal level,and the brittle_ductile deformation and greenschist facies metamorphism under the extension condition at the upper crust,to the brittle deformation and dynamic metamorphic rocks and their exhumation towards the upper crust derived from the ductile deformation under a continuous compression mechanism,whereas the expose of these rocks at surface fesulted from the extension and faulting.

关 键 词：高压变质岩 pttD轨迹 大别山 变质岩 

分 类 号：P588.3[天文地球—岩石学]