博格达山地区二叠纪以来构造应力场解析及地质意义

发布时间：2018-03-11 07:33

本文选题：博格达山　切入点：构造变形　出处：《大地构造与成矿学》2017年01期 　论文类型：期刊论文

【摘要】：博格达山是现代地质学研究的一个热点,但是大部分研究都集中在博格达何时隆升,对于其构造应力场的研究较少。作者通过对博格达山地区不同时代地层中岩墙、节理、褶皱和断层等构造进行分期配套以及构造要素测量分析,认为二叠纪以来博格达山及周缘地区具有较强构造变形,构造应力场可划分为3期:二叠纪末期最大主压应力方向为北西西向,可能与后碰撞伸展作用和乌拉尔碰撞带向东挤压的远程效应有关;侏罗纪末-早白垩世最大主压应力为近南北向,与欧亚板块和拉萨地块的碰撞有关;新近纪以来由于印度板块与欧亚板块相互碰撞的远程效应,博格达山地区最大主应力方向为NNE-NE向。这些结果表明,博格达山具有多期次的构造运动,主要受欧亚板块南缘不同时期小陆块碰撞的控制,并且这些构造应力场对周缘盆地油气成藏具有一定影响。
[Abstract]:Bogda Mountain is a hot spot in modern geology, but most of the studies focus on when Bogda uplifted and less on its tectonic stress field. The folds and faults were matched by stages and the structural elements were measured and analyzed. It is concluded that the Bogda Mountains and the surrounding areas have strong tectonic deformation since Permian. The tectonic stress field can be divided into three phases: the direction of the maximum principal compressive stress at the end of Permian is NW, which may be related to the extension of the post-collision and the remote effect of the eastward compression of the Ural collision zone; The maximum principal compressive stress of late Jurassic to early Cretaceous is nearly north-south, which is related to the collision of Eurasian plate and Lhasa block, and since Neogene, due to the long-range effect of collision between Indian plate and Eurasian plate, The direction of the maximum principal stress in the Bogda Mountains is in the direction of NNE-NE. These results indicate that the Bogda Mountains have multiple tectonic movements, which are mainly controlled by the collision of small land masses in different periods in the southern margin of the Eurasian plate. And these tectonic stress fields have a certain influence on the formation of oil and gas reservoirs in the peripheral basin.
【作者单位】：中国石油冀东油田分公司;甘肃省油气资源研究重点实验室/中国科学院油气资源研究重点实验室;中国科学院大学;
【基金】：中国科学院知识创新工程青年人才类重要方向项目(KZCX2-EW-QN112);中国科学院西部行动计划项目(KZCX2-XB3-12) 甘肃省科技计划(1309RTSA041)联合资助
【分类号】：P618.13;P542

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