摘要
银根-额济纳旗盆地简称银额盆地，是中亚造山带南缘的一个中-新生代沉积盆地。最近的野外地质调查，在其西缘发现早侏罗世和第四纪晚期的伸展构造。早侏罗世的伸展构造为一系列走向NNW—SSE的正断层，是下侏罗统的同沉积断层。这组正断层与银额盆地内NNE—SSW走向的正断层组合成共轭断裂系统，指示古构造应力场的最大主拉张应力方向为近E—W。它们是中亚造山带（南缘）造山后应力伸展阶段的构造变形。第四纪晚期的伸展构造是由两条倾向相向的正断层组合成的地堑构造，走向进E-W，可能代表了喜马拉雅碰撞造山远程效应脉动式演化过程的一个构造间歇期。
Yingen-Ejinaqi Basin, Yin-E Basin for short, is a Meso-Cenozoic basin on the southern margin of the central Asian orogenic belt. During our 2017 field geological investigation, Early Jurassic and Late Quaternary extensional structures were found on the western margin of the Yin-E Basin. The Early Jurassic extensional structures are a series of normal faults striking NNW-SSE. They are the syn-sedimentary faults of the Lower Jurassic strata. These normal faults and the NNE-SSW striking normal faults in the Yin-E Basin constitute a conjugate system indicating the maximum extensive stress in N-S direction in Early Jurassic. They are the post-orogenic structures of the central Asian orogenic belt. The Late Quaternary extensional structure is a graben composed by two normal faults dipping to each other. The normal faults strike in E-W direction. They represent possibly a tectonic pause between two successive thrust pulses of the far-field effect of the India-Asia collision.
作者
彭君
李继东
张洪安
李曰俊
陈清棠
彭雯淑
史大海
赵岩
韩波
朱湘松
Peng Jun;Li Jidong;Zhang Hongan;Li Yuejun;Chen Qingtang;Peng Wenshu;Shi Dahai;Zhao Yan;Han Bo;Zhu Xiangsong(Institute of Petroleum Exploration ＆ Development,Zhongyuan Oilfield Company,SINOPEC,Puyang,Henan 457001;Zhongyuan Oilfield Company,SINOPEC,Puyang,Henan 457001;Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029;School of Engineering ＆ Technology,China University of Geosciences,Beijing 100053;Kexin Petroleum Science ＆ Technology Service Co.,Ltd.,Korla,Xinjiang 841000)
出处
《地质科学》
CAS
CSCD
北大核心
2018年第4期1479-1487,共9页
Chinese Journal of Geology(Scientia Geologica Sinica)
基金
国家科技重大专项（编号：2016ZX05017-001）、油气基础地质调查项目（编号：DD20160169-YQ17W05）和中石化中原油田资助.
关键词
伸展构造
早侏罗世
第四纪晚期
造山后应力松弛
喜马拉雅碰撞造山远程效应
构造间歇期
银额盆地
中亚造山带
Extensional structures
Early Jurassic
Late Quaternary
Post-orogenic stress relaxation
Far-field effect of the India-Asia collision
Tectonic pause
Yingen-Ejinaqi Basin
Central Asian orogenic belt
作者简介
彭君，男，1970年6月生，博士，高级工程师，石油地质学专业。E—mail：1004489953@qq．com
