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鄂西北两郧断裂郧西段的第四纪活动与地震危险性

崔敏 郑荣荧 游嘉靖 赵钱

崔敏, 郑荣荧, 游嘉靖, 赵钱. 鄂西北两郧断裂郧西段的第四纪活动与地震危险性[J]. 地震科学进展, 2023, (3): 108-114. doi: 10.19987/j.dzkxjz.2022-141
引用本文: 崔敏, 郑荣荧, 游嘉靖, 赵钱. 鄂西北两郧断裂郧西段的第四纪活动与地震危险性[J]. 地震科学进展, 2023, (3): 108-114. doi: 10.19987/j.dzkxjz.2022-141
Cui Min, Zheng Rongying, You Jiajing, Zhao Qian. Quaternary activity and seismic hazard of Liangyun fault in northwestern Hubei area[J]. Progress in Earthquake Sciences, 2023, (3): 108-114. doi: 10.19987/j.dzkxjz.2022-141
Citation: Cui Min, Zheng Rongying, You Jiajing, Zhao Qian. Quaternary activity and seismic hazard of Liangyun fault in northwestern Hubei area[J]. Progress in Earthquake Sciences, 2023, (3): 108-114. doi: 10.19987/j.dzkxjz.2022-141

鄂西北两郧断裂郧西段的第四纪活动与地震危险性

doi: 10.19987/j.dzkxjz.2022-141
详细信息
    作者简介:

    崔敏(1983-),男,工程师,主要从事地震监测和地震工程研究。E-mail:734611685@qq.com。

    通讯作者:

    郑荣荧(1995-),男,助理工程师,主要从事地球物理和构造地质研究。E-mail:zry19950315@163.com

  • 中图分类号: P315.5

Quaternary activity and seismic hazard of Liangyun fault in northwestern Hubei area

  • 摘要: 两郧断裂带是鄂西北地区规模最大、影响最强的断裂之一,位于秦岭断块隆起区,长约200 km,走滑运动性质,第四纪分段活动特征明显,曾于1964年发生过郧西4.9级地震。此前对该断裂郧西段的第四纪活动研究较少,直接影响着对鄂西北地区活动构造变形格局和强震危险性的整体认识和评估。本文基于遥感解译、野外地质调查和高密度电法勘探研究,发现断裂沿线发育有串珠状盆地、负向断层长谷、断层垭口和断层崖等构造地貌形态。两陨断裂在早第四纪活动明显,晚第四纪以来活动微弱,滑动速率低,未来中强地震的危险性不容低估。

     

  • 图  1  区域地震构造简图

    Figure  1.  Regional simplified seismic structure map

    图  2  两郧断裂郧西段地震构造图(红线代表两郧断裂带)

    Figure  2.  Seismic structure of Liangyun fault in Yunxi county (red lines represent the fault)

    图  3  两郧断裂遥感解译结果

    Figure  3.  Interpreted remote sensing map of Liangyun fault

    图  4  郧西县土门镇水库附近断裂活动特征图(红色箭头指示断层位置)

    Figure  4.  Diagram of fault activity near Tumen town reservoir (red arrows indicate fault)

    图  5  郧西县黄石粱村附近断裂活动特征图(红色箭头指示断层位置)

    Figure  5.  Diagram of fault activity near Huangshiliang village (red arrows indicate fault)

    图  6  郧西县王家台子村附近断裂活动特征图(红色箭头指示断层位置)

    Figure  6.  Diagram of fault activity near Wangjiataizi village (red arrows indicate fault)

    图  7  郧县柳陂镇刘家桥村断层剖面图[10]

    Figure  7.  Sketch map in Liujiaqiao village in Yun county[10]

    图  8  跨两郧断裂开展的高密度电法勘探剖面(图中红色虚线为断裂的位置)

    Figure  8.  High-density electrical exploration across the fault (red dotted line represents fault)

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出版历程
  • 收稿日期:  2022-09-15
  • 录用日期:  2022-11-07
  • 网络出版日期:  2022-11-08

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