柯坪地区构造弱信息提取及左行走滑断层证据  

Extraction of Weak Structural Information and Evidences of Sinistral Strike Slip in Kalpin Area, Xinjiang, Northwest China

作　　者：范湘涛 卢华复[1] 石火生[1] 郭华东[2] 邵芸[2] 

机构地区：[1]南京大学地球科学系,江苏南京210093 [2]中国科学院遥感信息科学开放研究实验室,北京100101

出　　处：《高校地质学报》2000年第1期23-28,共6页Geological Journal of China Universities

基　　金：国家自然科学基金!资助项目 (49832 0 40 )

摘　　要：通过对柯坪地区TM数据、航天飞机SIR A数据以及高光谱数据的综合处理和野外调查研究 ,充分利用雷达图象对地面结构信息的表现能力 ,采用多种数据源复合的方法 ,增强低序次构造信息和浅覆盖物下的地质体界面信息 ,从图象上提取有用的构造弱信息。这些信息显示的一系列证据确定了该区强烈左行走滑活动特征 ,从而揭示本区地质体在外力作用下产生的变形格局和运动学过程。The peculiar geomorphologic pattern of Kalpin area, northwest flank of Tarim Basin is represented by certain regular structural shapes on remote sensing images. These structure patterns are rich in information of kinematic and dynamic characteristics of this area and could be used to reveal tectonic history and deformation characteristics of Tian Shan and Tarim Plates. Based on field study and integrated processing of Landsat TM, SIR A and hyperspectral images of Kalpin area, as well as the radar image expressing surface features, we extracted weak structural information from the images and enhanced secondary order structures and interface information of geologic bodies with thin covers. The Kalpin ranges, comprising of strata from the Cambrian to the Permian, is composed of a series of thrust sheets of the Late Cenozoic. Interpretation of remote sensing images and field surveying have revealed that there are two strike slip fault bend contortions and a strike slip fault propagation contortion. Studies on the deformation of the thrust sheets and the reduplication of these sheetes in map view suggested that the force model of this area is determined by the sinistral strike slip in east west and northeast directions under the compression from north to south. After detailed study on the image characteristics and tectonic features of six sub areas (A, B, C, D, E, F), we analyzed the characteristics of secondary order structural deformation, geological interfaces under thin covers, and the related deformation caused by sinistral strike slip in this area. Sub area A exhibits that several strata layers are cut off by the northweat trending fault, which forms the strike slip fault bend. Sub area B is the most distinctive north south trending fault zone in this area. It is a synthetic breakthrough fault of the sinistral strike slip fault propagation contortion in the east part of this area. Sub area C shows the deformation character of thrust sheets trending from EW to NE, which, together with the sinis

关 键 词：左行走滑 低序次构造 弱信息提取 柯坪地区 断层 

分 类 号：P542.3[天文地球—构造地质学]