| 博格达山地区二叠纪以来构造应力场解析及地质意义 |
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| 引用本文： | 关宝文,郑建京,赵恒,郭建明,杨燕,王亚东,郑有伟.博格达山地区二叠纪以来构造应力场解析及地质意义[J].大地构造与成矿学,2017,41(1):42-49. |
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| 作者姓名： | 关宝文 郑建京 赵恒 郭建明 杨燕 王亚东 郑有伟 |
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| 作者单位： | 1. 中国石油冀东油田分公司,河北唐山063004;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,甘肃兰州730000;中国科学院大学,北京100049;2. 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,甘肃兰州,730000;3. 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,甘肃兰州730000;中国科学院大学,北京100049 |
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| 基金项目： | 中国科学院知识创新工程青年人才类重要方向项目，中国科学院西部行动计划项目，甘肃省科技计划 |
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| 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。
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| 关 键 词： | 博格达山 构造变形 构造应力场 最大主应力 节理 岩墙 褶皱 |
Structural Stress Fields of Bogda Mountain Area Since Permian and its Geological Significances |
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| Abstract: | Many investigations have been carried out on the uplift time of the Bogda Mountain,however,its structural stress fields is not well documented.Based on the stage matching and analysis of the structural elements of the dykes,joints,folds and faults,three periods of strong structural deformation and structural stress fields since Permian can be recognized in the Bogda Mountain and adjacent areas.In the end of Permian,the direction of the maximum principal stress was NWW trending,which was possibly influenced by post-collisional extension and the distant effect of the eastward compression of the Ural Collision Belt.The direction of the maximum principal stress was near SN trending in the end of Jurassic to early Cretaceous,which formed possibly by the collision of the Lhasa Block and Eurasia Plate.And it was NNE-NE trending since Neogene in the Bogda Mountain area as a result of the far-effect of the India-Eurasia collision.These results suggest that the Bogda Mountain experienced multi-phase uplifting,mainly caused by the collisions of different small blocks at the southern edge of the Eurasia plate,and the changes of stress field may influence the hydrocarbon accumulations in the basins. |
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| Keywords: | Bogda Mountain structural deformation structural stress fields maximum principal stress joints dyke folds |
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