康西瓦走滑构造带及其大地构造意义  

KANGXIWAR SHOVE TECTONIC BELT (KSTB)AND ITS SIGNIFICANCE

作　　者：李向东 王元龙[1] 黄智龙[1] 

机构地区：[1]新疆维吾尔自治区地质矿产局地质矿产研究所,中国科学院地球化学研究所

出　　处：《新疆地质》1996年第3期204-212,共9页Xinjiang Geology

摘　　要：康西瓦构造带位于新疆西昆仑山地区，是青藏高原西北缘一条重要的构造带。经实地考察发现；构造由多条长期活动的断裂带构成，沿断裂有糜棱岩带、角砾岩带和片理化带分布，同时发育韧、脆性变形；构造带两侧的地层时代与沉积建造、岩浆活动以及遥感图象和地貌特征都存在明显的差异。糜棱岩定向标本研究表明，构造带中韧性变形具有右行剪切特征；运动矢量及应力场模拟计算证实，构造带中脆性变形的构造运动以水平运动方式为主。综合以上资料及前人的研究成果认为，康西瓦构造带是分隔古亚洲和特提斯两大构造域的右行走滑转换构造带。KSTB is located at the West Kunlun Mts. of Xinjiang,as an important tectonic belt at the northwestern margin of Qinhai-Tibet plateau. The geological investigation shows that KSTB consists of several long-time acting structural belts; that mylonite belts, breccia belts and schistosity belts occur along the fault;that ductile and brittle deformations are well-developed; and that the stratigraphic age, sedimentary formation, metamorphic degree, magmatic activity as well as remote sensing imagery and geomorphologic shape are obviously different on both sides of KSTB. The orientation of mylonites indicates that the ductile deformation is of right-hand shearing character in KSTB. The modelling calculation of movement vector and stress field conforms that the horizontal movement is dominated in tectonic movement of brittle formation. Based on above data and previous study KSTB is regarded as a right-hand shove transform tectonic belt which divides the paleo-Asian tectonic domain and the Tethys domain.

关 键 词：新疆 西昆仑山 康西瓦 走滑构造带 大地构造意义 

分 类 号：P542[天文地球—构造地质学]