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公元600年秦陇地震发震构造分析及考证研究

王师迪 师亚芹 任凤文

王师迪, 师亚芹, 任凤文, 2018. 公元600年秦陇地震发震构造分析及考证研究. 地质力学学报, 24 (2): 157-168. DOI: 10.12090/j.issn.1006-6616.2018.24.02.017
引用本文: 王师迪, 师亚芹, 任凤文, 2018. 公元600年秦陇地震发震构造分析及考证研究. 地质力学学报, 24 (2): 157-168. DOI: 10.12090/j.issn.1006-6616.2018.24.02.017
WANG Shidi, SHI Yaqin, REN Fengwen, 2018. ANALYSIS AND TEXTUAL RESEARCH OF THE SEISMOGENIC STRUCTURE OF THE QIN-LONG EARTHQUAKE IN 600 A.D.. Journal of Geomechanics, 24 (2): 157-168. DOI: 10.12090/j.issn.1006-6616.2018.24.02.017
Citation: WANG Shidi, SHI Yaqin, REN Fengwen, 2018. ANALYSIS AND TEXTUAL RESEARCH OF THE SEISMOGENIC STRUCTURE OF THE QIN-LONG EARTHQUAKE IN 600 A.D.. Journal of Geomechanics, 24 (2): 157-168. DOI: 10.12090/j.issn.1006-6616.2018.24.02.017

公元600年秦陇地震发震构造分析及考证研究

doi: 10.12090/j.issn.1006-6616.2018.24.02.017
基金项目: 

国家自然科学基金项目 41172195

地震科技星火计划 XH16035

现代古生物学和地层学国家重点实验室开放课题基金项目 173106

详细信息
    作者简介:

    王师迪(1988-), 女, 博士研究生, 构造地质学专业。E-mail:wsdcherry@163.com

    通讯作者:

    师亚芹(1963-), 女, 研究员, 研究方向为活动构造。E-mail:syq0651@sina.com

  • 中图分类号: P315.22

ANALYSIS AND TEXTUAL RESEARCH OF THE SEISMOGENIC STRUCTURE OF THE QIN-LONG EARTHQUAKE IN 600 A.D.

  • 摘要: 据史料记载,公元600年秦陇地区发生了一次大地震。关于此次地震的震中位置、震级、震中烈度和发震构造长期存在争议。根据在陇县固关一带发现的地震崩塌体,同时结合史料考证、卫星影像判读、野外调查、探槽开挖、年龄测试等手段,研究认为:公元600年秦陇地震的发震构造为六盘山东麓断裂南段固关段;秦陇地震震中在陇县固关镇一带,震级为6$ {}^{3}\!\!\diagup\!\!{}_{4}\; $级,震中烈度为Ⅸ度。该地震的研究对于六盘山地区地震危险性评估和青藏块体北东向扩展的动力学过程理解有重要意义。

     

  • 图  1  公元600年秦陇地震震中及邻区断裂分布图

    F1—六盘山东麓断裂;F2—陇县-岐山-马召断裂;F3—西秦岭断裂;F4—秦岭北缘断裂;F5—渭河北缘断裂;F6—渭河断裂;F7—口镇-关山断裂;F8—华山山前断裂;F9—骊山山前断裂;F10—长安-临潼断裂

    Figure  1.  The distribution map of the epicenter and adjacent faults of Qin-Long earthquake in 600 A.D.

    图  2  固关段崩塌体分布及实地照片

    a—崩塌体分布图;b—李家山崩塌体;c—六股槐崩塌体;d,e—前山沟崩塌体;f—石瓮子沟崩塌体;g—米家园崩塌体;h,i—陈家河崩塌体

    Figure  2.  Distribution and photos of collapses along Guguan segment

    图  3  前山沟崩塌体及河流堆积年龄

    Figure  3.  Collapses in Qianshangou and the ages of fluvial accumulation

    图  4  固关段2.5 m分辨率卫星影像

    Figure  4.  2.5 m resolution satellite image of the Guguan segment

    图  5  固关段地质图及其地貌特征分布

    Figure  5.  Geological map and geomorphic features of the Guguan segment

    图  6  断层0.5 m分辨率卫星影像及其左旋位移

    a—殿咀村断层卫星影像及位移;b—六股槐村断层卫星影像及位移;c,d—殿咀村西沟渠左旋卫星影像及解译放大图

    Figure  6.  0.5 m resolution satellite images of the fault and its left-lateral displacements

    图  7  探槽DTC4北壁

    Figure  7.  North wall of trench DTC4

    图  8  探槽DTC4南壁及其地层年龄

    Figure  8.  South wall of trench DTC4 and the ages of its strata

    图  9  公元600年秦陇地震极震区及重破坏区图

    Figure  9.  Magistoseismic and heavy damage area of the Qing-Long earthquake in 600 A.D.

    表  1  14C样品年龄测试结果

    Table  1.   Results of the AMS 14C age dating

    样品编号 实验室号 经度(E) 纬度(N) 物质 d13C/‰ 14C年龄/
    a BP
    校正年龄/
    a BP
    采样点
    QSGP2-1 Beta-373491 106.6598° 34.9614° 有机沉积 -23.2 1650±30 1610~1525 前山沟漫滩堆积
    QSGP3-2 Beta-373492 106.6598° 34.9614° 有机沉积 -23.6 6810±40 7690~7585 前山沟漫滩堆积
    QSG2 Beta-364993 106.6674° 34.9572° 有机沉积 -23.2 1970±30 2000~1880 前山沟漫滩堆积
    QSG3 Beta-364994 106.6674° 34.9572° 有机沉积 -23.3 2680±30 2680~2760 前山沟漫滩堆积
    DZTC4C1 Beta-439222 106.9736° 34.9418° 有机沉积 -22.4 3300±30 3590~3455 探槽DTC4层⑤顶部
    DZTC4C2 Beta-430697 106.9736° 34.9418° 有机沉积 -23.7 1180±30 1025~1005 探槽DTC4层⑥底部
    注:样品由美国Beta实验室进行测试分析
    下载: 导出CSV
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  • 收稿日期:  2017-12-10
  • 修回日期:  2018-03-01
  • 刊出日期:  2018-04-28

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