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新疆西准噶尔晚古生代以来构造样式与变形序列研究
引用本文:徐芹芹,季建清,龚俊峰,赵磊,涂继耀,孙东霞,陶涛,朱自虎,何国琦,侯建军.新疆西准噶尔晚古生代以来构造样式与变形序列研究[J].岩石学报,2009,25(3):636-644.
作者姓名:徐芹芹  季建清  龚俊峰  赵磊  涂继耀  孙东霞  陶涛  朱自虎  何国琦  侯建军
作者单位:北京大学地球与空间科学学院,造山带与地壳演化教育部重点实验室,北京,100871
基金项目:国家重点基础研究发展计划项目(2007CB411300、2001CB409802)和国家自然科学基金项目(49872078)
摘    要:断裂构造的发育是不同地质历史、不同应力场条件下地壳应变的叠加。针对某一地域断裂构造的研究,理清其发育序次和不同阶段断裂系统对应的构造应力场,是了解区域大地构造性质演变的重要环节。新疆西准噶尔地区构造运动和岩浆活动非常强烈,是认识中亚构造域性质的重要研究基地,同时也为断裂构造和变形序次研究提供了很好的野外实验室。通过对研究区1500个构造面理产状数据的统计与分析,认为新疆西准噶尔地区主要发育以下几组构造面理:(1)290°走向;(2)10°~20°和80~90°走向;(3)40°~45°和320°~325°走向;(4)60°~70°和340°~350°走向。通过对野外构造现象、断裂之间的交切关系、断裂与相关地层及岩体的切割关系等的综合分析,结合遥感图像解译,确立了走滑断裂是西准噶尔地区晚古生代以来主要的构造样式,并建立了相应的变形序列:(1)大约在二叠纪晚期-三叠纪,由于准噶尔与中天山汇聚末期的区域性水平运动,受到北西-南东向的挤压应力作用,发育最早一期北西西向(290°左右)右旋走滑断裂;(2)侏罗纪-白垩纪,地层产状平缓,没有发现区域性构造变形证据;(3)古近纪,主要受制于太平洋构造域,受到北西-南东向挤压应力作用,发育北北东向(10°~20°)左旋与近东西向(80°~90°)右旋共轭走滑构造;(4)新近纪早期,受印度大陆和欧亚大陆碰撞的远程效应影响,应力场为近南北向,发育北东向(40°~45°)、北西向(320°~325°)走滑构造,新近纪晚期应力场发生了小角度顺时针旋转,构造形迹又转变为北东东向(60°~70°)和北北西向(340°~350°)。

关 键 词:晚古生代  走滑断裂  变形序列  西准噶尔
收稿时间:2008/12/8 0:00:00
修稿时间:2009/1/18 0:00:00

Structural style and deformation sequence of western Junggar, Xinjiang, since Late Paleozoic
XU QinQin,JI JianQing,GONG JunFeng,ZHAO Lei,TU JiYao,SUN DongXi,TAO Tao,ZHU ZiHu,HE GuoQi and HOU JianJun.Structural style and deformation sequence of western Junggar, Xinjiang, since Late Paleozoic[J].Acta Petrologica Sinica,2009,25(3):636-644.
Authors:XU QinQin  JI JianQing  GONG JunFeng  ZHAO Lei  TU JiYao  SUN DongXi  TAO Tao  ZHU ZiHu  HE GuoQi and HOU JianJun
Institution:Key Laboratory of Orogenic Belts and Crustal Evolution, MOE, School of Earth and Space Sciences, Peking University, Beijing 100871, China;Key Laboratory of Orogenic Belts and Crustal Evolution, MOE, School of Earth and Space Sciences, Peking University, Beijing 100871, China;Key Laboratory of Orogenic Belts and Crustal Evolution, MOE, School of Earth and Space Sciences, Peking University, Beijing 100871, China;Key Laboratory of Orogenic Belts and Crustal Evolution, MOE, School of Earth and Space Sciences, Peking University, Beijing 100871, China;Key Laboratory of Orogenic Belts and Crustal Evolution, MOE, School of Earth and Space Sciences, Peking University, Beijing 100871, China;Key Laboratory of Orogenic Belts and Crustal Evolution, MOE, School of Earth and Space Sciences, Peking University, Beijing 100871, China;Key Laboratory of Orogenic Belts and Crustal Evolution, MOE, School of Earth and Space Sciences, Peking University, Beijing 100871, China;Key Laboratory of Orogenic Belts and Crustal Evolution, MOE, School of Earth and Space Sciences, Peking University, Beijing 100871, China;Key Laboratory of Orogenic Belts and Crustal Evolution, MOE, School of Earth and Space Sciences, Peking University, Beijing 100871, China;Key Laboratory of Orogenic Belts and Crustal Evolution, MOE, School of Earth and Space Sciences, Peking University, Beijing 100871, China
Abstract:
Keywords:Late Paleozoic  Strike-slipping fault  Deformation sequence  Western Junggar
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