内蒙古苏尼特左旗巴润萨拉北东向强变形带的构造特征及其形成环境  

STRUCTURAL FEATURE AND FORMING ENVIRONMENT OF NE-EXTENDING HIGH DEFORMATION BAND IN BARUNSALA OF SONID ZUOQI,INNER MONGOLIA

作　　者：赵国春[1] 刘刚[1] 

机构地区：[1]地质矿产部航遥中心

出　　处：《现代地质》1995年第2期226-233,共8页Geoscience

摘　　要：内蒙古苏尼特左旗地区发育一条北东向的较大型强变形带，经历了自海西晚期至燕山早期的３个韧性变形序列，其中，印支晚期为主变形期，发育强烈的韧性剪切带，呈现强应变带与弱应变域交织的格局，有先左行后右行的韧性压剪变形特点。该剪切带形成于温度约２２０℃、围压约２７０ＭＰａ，距地面约１１ｋｍ的地壳深部。燕山晚期本区以脆性构造为主，断裂构造发育。海西和印支构造奠定了本区的主要构造格局。here is a great high deformation band in the area of Sonid Zuoqi. It experienced three succession of ductile deformation from late Hercynian orogeny to early Yanshan orogeny. The main deformation of the ductile shear zone formed in late Indo-Chinese epoch. The high strain zones and low ones appear by turn. The left-lateral shear deformation was earlier than the right-lateral one.The forming depth, temperature and pressure is 11 km, 220℃, 270 MPa respectively. In the late Yanshan orogeny, this area was characterized by brittle fracture. The structure of Hercynian orogeny and Indo-Chinese epoch formed the main structural framwork.

关 键 词：构造变形序列 剪切带 苏尼特左旗地区 内蒙古 

分 类 号：P534.3[天文地球—古生物学与地层学]