塔里木盆地南部中生代碰撞相关构造及其在古特提斯研究中的意义  

The Mesozoic collision related structures in the southern Tarim Basin,West China:Implications for Paleo-Tethys tectonic evolution

作　　者：李勇[1] 李曰俊[2] 杨宪彰[1] 文磊 黄少英[1] 张亮[1] 王祥[1] 陈才[1] 王斌[1] 段云江[1] 周慧[4] 李洪辉[4] 刘亚雷 黄彤飞 Li Yong;Li Yuejun;Yang Xianzhang;Wen Lei;Huang Shaoying;Zhang Liang;Wang Xiang;Chen Cai;Wang Bin;Duan Yunjiang;Zhou Hui;Li Honghui;Liu Yalei;Huang Tongfei(Tarim Oilfield Company,PetroChina,Korla,Xinjiang 841000;Key Laboratory of Petroleum Resource Research,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029;Oil and Gas Survey,China Geological Survey,Beijing 100083;Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083)

机构地区：[1]中国石油天然气股份有限公司塔里木油田分公司,新疆库尔勒841000 [2]中国科学院地质与地球物理研究所,油气资源研究重点实验室,北京100029 [3]中国地质调查局油气资源调查中心,北京100083 [4]中国石油天然气股份有限公司勘探开发研究院,北京100083

出　　处：《地质科学》2022年第2期315-340,共26页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家科技重大专项(编号:2017ZX05008-004,2016ZX05004-004);中石油科技研发项目(编号:2021DJ05);中石油塔里木油田科技项目(编号:041019120072)资助。

摘　　要：地震资料解释和野外地质调查,在塔里木盆地南部发现中生代碰撞相关构造。同碰撞构造发育于西昆仑山前、阿尔金山前和麦盖提斜坡,为晚三叠世冲断构造。既有晚三叠世新形成的冲断构造,也有先存构造的复活(如车尔臣断裂)。碰撞后构造见于西昆仑和阿尔金山前,是一些规模不大的侏罗纪—白垩纪正断层及其控制下形成堑—垒构造。晚三叠世构造应力场的最大主压应力方向,在西昆仑山前和麦盖提斜坡均为NNE-SSW;冲断方向是由造山带向塔里木盆地,在麦盖提斜坡有反冲。它们是塔里木板块南缘一次碰撞造山的同碰撞构造。这是北羌塘—塔里木碰撞,是古特提斯洋复杂的闭合过程中的一次重要的构造事件。塔里木南部的侏罗纪—白垩纪伸展构造是其碰撞后构造。The Mesozoic syn-and post-collision structures in response to the North Qiangtang-Tarim collision were discovered in the southern Tarim Basin after seismic interpretation and field investigation.The syn-collision structures are the Late Triassic thrusts in the piedmonts of the western Kunlun and Altun mountains and the Markit slope.Not only newly formed thrusts,but also reviving of some pre-existing thrusts,such as the Qarqan fault in the piedmont of the Altun Mountain.The post-collision structures are the Jurassic-Cretaceous normal faults and the horst-graben structures formed with them.The maximum stress direction of the Late Triassic thrusts is SSW-NNE in the piedmont of West Kunlun Mountain and the Markit slope and SSE-NNW in the piedmont of Altun Mountain.They thrust mainly from the mountains to the Tarim Basin,meanwhile,there are also some Late Triassic back-thrusts in the Markit slope.The Jurassic-Cretaceous normal faults are the post-collision structures.Deduced from these collision-related structures,we can fairly infer that,the North Qiangtang-Tarim collision occurred in Late Triassic,ceased at the end of Late Triassic and then evolved into the Jurassic-Cretaceous post-collision extensional tectonic stage.This Late Triassic collision is an important tectonic event in the complicated closing process of the Paleo-Tethys.

关 键 词：晚三叠世冲断构造 侏罗纪—白垩纪正断层 碰撞相关构造 塔里木盆地南部 北羌塘—塔里木碰撞 古特提斯闭合 

分 类 号：P542[天文地球—构造地质学]