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首页> 外文期刊>Doklady Earth Sciences >Fault zones and stress fields of the Earth's crust in the vicinity of Ulaanbaatar (Mongolia) at the modern stage of tectogenesis
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Fault zones and stress fields of the Earth's crust in the vicinity of Ulaanbaatar (Mongolia) at the modern stage of tectogenesis

机译：构造发生现代阶段乌兰巴托（蒙古）附近地壳的断裂带和应力场

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摘要

The seismic and emanation activity of fault zones at a geodynamic test site arranged in the vicinity of Ulaanbaatar to investigate dangerous geological processes in a heavily populated area of Mongolia is analyzed. It has been found that, at the modern stage of tectogenesis, destruction of the Earth's crust occurs in the area of the strike-slip fault transformed from the Indo-Asian collision zone. Thus, a network of fault zones with seismic and emanation activity is developed in this area. In the vicinity of Ulaanbaatar, there are four systems of fault zones. The spatial pattern of the systems shows a nodal junction of comparatively large rightlateral and left-lateral strike-slip faults of submeridional and sublatitudinal orientation. These strike-slips are barely connected with a network of ancient faults. The northwestern and northeastern zones developed by compression and tension, on the contrary, inherit disjunctive structures of the most recent age located in a nodal junction at the tops of dihedral angles. Determination of the pattern of recent faulting is essential to estimate the seismic hazard for the capital of Mongolia, where more than one-third of the nation lives.
机译：分析了分布在乌兰巴托附近的一个地球动力学试验场的断层带的地震和散发活动，以调查蒙古人口稠密地区的危险地质过程。已经发现，在构造运动的现代阶段，地壳的破坏发生在由印度-亚洲碰撞带转变的走滑断层区域。因此，在该地区建立了具有地震和放射活动的断层带网络。在乌兰巴托附近，有四个断裂带系统。该系统的空间格局显示出一个较大的右下和纬下方向的右，左走滑断层的结点。这些走滑几乎与古代断层网络相连。相反，通过压缩和拉力形成的西北和东北地区继承了位于二面角顶部节点结处的最近年龄的分离结构。确定最近断层的模式对于估算蒙古国首都蒙古所遭受的地震危害至关重要，该国三分之一以上的人口居住在该国。

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  • 来源
    《Doklady Earth Sciences》 |2017年第1期|511-515|共5页
  • 作者

    Seminsky K. Zh.; Demberel S.; Mungunsuren D.;

  • 作者单位

    Russian Acad Sci, Inst Earths Crust, Siberian Branch, Irkutsk 664033, Russia;

    Acad Sci Mongolia, Mongolia Res Ctr Astron & Geophys, Ulaanbaatar 210351, Mongol Peo Rep;

    Acad Sci Mongolia, Mongolia Res Ctr Astron & Geophys, Ulaanbaatar 210351, Mongol Peo Rep;

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