西湖凹陷反转构造物理模拟研究
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中海油研究总院,中海油研究总院,中海油研究总院,中国石油大学(北京)

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P542

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Physical modeling of tectonic inversion in the Xihu Sag East China Sea Shelf Basin, China
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    摘要:

    反转构造是东海盆地西湖凹陷特征构造,由北向南反转构造呈明显分段性变化,北段是“Y”字型构造,中段为膝折带构造,南段为高角度叠瓦状逆冲构造。本文通过构造物理模拟实验再现了反转构造形成过程和控制因素。实验结果表明:反转构造由北向南规律性变化受控于不同的边界条件,北段和南段为弱边界条件,中段为刚性边界条件;挤压边界与先存正断层之间距离对反转构造样式具有明显影响。挤压边界距离早期正断层越远,反转背斜核部离早期正断层越近,反之越远。

    Abstract:

    Tectonic inversion is the characteristic structure of Xihu Sag East China Sea Shelf Basin, and obviously segmented from north to south, the “Y- type” structure in the northern part, the middle kink band structure in the middle, high angle imbricate inversion structures in the southern part. Three groups of structural physical modelling experiment are designed to considerate the formation process and control factors. The experiment results show that the various tectonic inversion from north to South was controlled by different boundary conditions, weak boundary conditions in the northern and southern segment, rigid boundary condition in the middle segment. Furthermore, the distance between extrusion boundary and pre-existing normal fault plays obvious influence on the inversion structural styles. The farther pre-existing normal fault is away from the extrusion boundary, the closer the inversion anticline is away from the pre-existing fault; conversely, the farther.

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闫淑玉,吴景富,赵志刚,等. 西湖凹陷反转构造物理模拟研究[J]. 科学技术与工程, 2016, 16(21): .
. Physical modeling of tectonic inversion in the Xihu Sag East China Sea Shelf Basin, China[J]. Science Technology and Engineering,2016,16(21).

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历史
  • 收稿日期:2016-03-11
  • 最后修改日期:2016-04-12
  • 录用日期:2016-04-22
  • 在线发布日期: 2016-08-09
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