摘要
大别山北部糜棱岩中石英的高温应变陈晶，王清晨（中国科学院地质研究所岩石圈构造演化开放研究实验室北京１０００２９）关键词大别山，糜棱岩，显微构造，高温应变。中留法》分类号Ｐ５８３超高压变质岩的发现导致了人们对大别山构造格架的重新认识。最近的研究表明，超...
The well-known sinistral strike-slip Xiaotian-Mozitan Fault is the northern boundary of the Northern Dabie Paleozoic island arc complex. The present study shows that there existed an earlier mylonite zone south to the Xiaotian-Mozitan Fault.Quartz grains in the mylonite zone developed extensively hasal subgrain boundary (0001). A high temperature (>650℃) strain of slipping along the c-axis in quartz grains is manifested by the point maximum parallel to the stretch lineation in polar diagram of c-axis fabric. A top-to-the-north shear sense is also indicated. In the context of the regional geology, this shear sense might imply the northwards subduction of the Northern Dabie Paleozoic island arc complex. On the other hand.prismatic subgrain boundary (hklO) parallel to the c-axis is observed in the quartz grains from the mylonite zone. It reflects a low temperature strain of slip along a-axis in quartz grain, that could result from the late sinistral strike-slip.
出处
《地质科学》
CAS
CSCD
北大核心
1995年第4期432-435,T001,共5页
Chinese Journal of Geology(Scientia Geologica Sinica)
基金
国家自然科学基金
关键词
大别山
糜棱岩
显微构造
高温应变
Dabieshan, Mylonite, Microstructure, High-temperature strain
