塔里木西南缘(齐姆根弧)前陆构造及形成机理  

A Study on the Foreland Structure of the Qimugen Arc in Southwest Tarim and Its Genetic Mechanism

作　　者：曲国胜[1] 李亦纲[1] 张宁[1] 李岩峰[1] 陈杰[1] 陈新安[2] 尹军平 张兴林 Joseph CANEROT Joachin DERAMOND Jacques REY 

机构地区：[1]中国地震局地质研究所,北京100029 [2]塔里木油田公司塔西南勘探开发公司,新疆泽普844804 [3]Paul Sabatier ToulouseⅢ大学沉积盆地动力学实验室,法国Toulouse

出　　处：《地质论评》2004年第6期567-576,i002,共11页Geological Review

基　　金：国家自然科学基金项目 (编号 49872 0 75 );国家重点基础研究发展规划项目 (编号 G19990 43 3 0 5 );国家自然科学基金重点项目(编号 4983 40 0 5 )的成果

摘　　要：在对齐姆根弧形构造地表地质构造和深部地球物理资料综合分析的基础上 ,阐述了齐姆根弧形构造的几何学、运动学和分段性 ,提出了齐姆根弧形构造由依格孜牙薄皮推覆构造段、齐姆根主弧形三角带构造段和叶尔羌—棋盘对冲构造段组成 ,各弧形构造段之间以横向走滑—斜冲断层为界 ;发现了齐姆根弧形构造中规模巨大的塔里木西南盆地白垩系—新生界沉积盖层向西昆仑—帕米尔被动反 (逆 )冲逆掩构造系统 ,阐述了齐姆根主弧形构造段由铁克里克主动逆冲推覆系统、塔里木西南盆地被动反冲逆掩系统和深部双重构造组成。齐姆根弧形构造的隆升时期为喜马拉雅运动 ,新生代 。Based on a comprehensive analysis of the Qimugen arcuate structure in terms of the field geological structures and geophysical data, this paper presents a description of the geometry and kinematics of the Qimugen arcuate structure and suggests that it consists of three segments, i.e. the Yigeziya thin skin nappe structure segment, the Qimugen main arcuate and triangle zone segment and the Yarkant—Qipan ramp structure segment. The segments are bounded by strike slip faults. It is discovered that a huge Cretaceous—Quaternary sedimentary cover of the Southwest Tarim Basin back thrust toward the West Kunlun—Pamir. The main Qimugen arcuate structure is a typical triangle zone which consists of the Tiekelike active thrusting system, the Southwest Tarim Basin passive thrusting system and the deep seated duplex structure. The uplift of the Qimugen arcuate structure took place during the Himalayan orogeny, mainly attributed to the deep duplex structure resulting from the northward or northeastward migration of the West Kunlun—Pamir in the Cenozoic, especially since the Quaternary.

关 键 词：弧形构造 塔里木 西昆仑 双重构造 隆升 盆地 沉积盖层 深部 地质构造 断层 

分 类 号：P542[天文地球—构造地质学] P315.2[天文地球—地质学]