摘要
通过空间展布特征、物质组成、运动学特征及构造年代学研究,确定东昆仑造山带西段布喀达坂峰地区东昆南断裂是由碎屑质糜棱岩构成的韧性剪切带,表现为左行平移的运动学特征,绢云母单矿物40Ar-39Ar坪年龄值为234～237兆年,从而确定东昆南断裂主期变形时代为中三叠世。
Based on a study of spatial spreading feature,material composition,kinematic characteristic and tectonic chronology of East part of Southern Kunlun Fracture at Bukedaban area of west part of East Kunlun Orogenic Belt,the authers suggest that the fracture is a ductile shear zone which is composed of clastic mylonites.The fracture shows kinematic characteristic of sinistral displacement.40Ar-39Ar age of sericite is 234～237Ma,so major strong deformation of Eastern South Kunlun Fracture were chiefly formed in Middle Triassic.
出处
《青海大学学报（自然科学版）》
2010年第3期36-41,共6页
Journal of Qinghai University(Natural Science)
关键词
东昆仑
昆南断裂
韧性剪切带
East Kunlun
Southern Kunlun fracture
ductile shear zone
