藏北红脊山构造混杂岩带南缘猫耳山边界断裂初探  

Maoershan Boundary Fault Along the South Edge of Hongjishan Tectonic Mixtite in North Tibet

作　　者：白艳萍[1] 刘苏桥[1] 唐专红[2] 张能[2] 陆济璞[2] 

机构地区：[1]桂林理工大学有色及贵金属隐伏矿床勘查教育部工程研究中心,广西桂林541004 [2]广西区域地质调查研究院,广西桂林541003

出　　处：《桂林理工大学学报》2010年第2期202-207,共6页Journal of Guilin University of Technology

基　　金：中国地质调查局项目<1:25万查多岗日区域地质调查>(200313000012);有色及贵金属隐伏矿床勘查教育部工程研究中心建设项目(桂科能07109011-K025)

摘　　要：猫耳山边界断裂是红脊山构造混杂岩带的南缘边界,具韧性变形特征,发育以糜棱岩为代表的塑性变形岩石序列。断裂活动复杂,至少可以识别出逆冲、走滑、逆冲3期构造活动。对其变形环境初步分析表明,在挤压体制下,断裂形成半韧性—韧性变形构造域;红脊山构造混杂岩带内蓝闪片岩中蓝闪石40Ar-39Ar年龄为213.2±3 Ma,为断裂形成时代。Maoershan boundary fault is located along the south edge of Hongjishan tectonic mixtite.It is composed of a series of plastic mylonite,with the characters of ductile deformation.This fault dislpays active,at least three periods recognized as thrusting,striking,and thrusting.By analyzing the deformation setting,it is suggested that Maoershan fault is the semi-ductile deformation to ductile deformation with the compress.The 213 Ma,dating of ^40Ar-^39Ar of glaucophane from glaucophane schist in Hongjishan,represents the age of formation of the fault.

关 键 词：构造混杂岩 边界断裂 成因 时代 红脊山 猫耳山 西藏 

分 类 号：P542.3[天文地球—构造地质学]