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    鄂西丹江口水库区域周边断裂构造解析及特征

    林松 唐启家 李媛 罗登贵 廖武林 王秋良

    林松, 唐启家, 李媛, 罗登贵, 廖武林, 王秋良, 2017. 鄂西丹江口水库区域周边断裂构造解析及特征. 地球科学, 42(10): 1830-1841. doi: 10.3799/dqkx.2017.555
    引用本文: 林松, 唐启家, 李媛, 罗登贵, 廖武林, 王秋良, 2017. 鄂西丹江口水库区域周边断裂构造解析及特征. 地球科学, 42(10): 1830-1841. doi: 10.3799/dqkx.2017.555
    Lin Song, Tang Qijia, Li Yuan, Luo Denggui, Liao Wulin, Wang Qiuliang, 2017. Analysis and Characteristics of Faults around Danjiangkou Reservoir, West Hubei Province. Earth Science, 42(10): 1830-1841. doi: 10.3799/dqkx.2017.555
    Citation: Lin Song, Tang Qijia, Li Yuan, Luo Denggui, Liao Wulin, Wang Qiuliang, 2017. Analysis and Characteristics of Faults around Danjiangkou Reservoir, West Hubei Province. Earth Science, 42(10): 1830-1841. doi: 10.3799/dqkx.2017.555

    鄂西丹江口水库区域周边断裂构造解析及特征

    doi: 10.3799/dqkx.2017.555
    基金项目: 

    中国地震局社会公益研究项目 1521401800062

    中央高校基本科研业务费专项资金 G1323531509

    国家自然科学基金青年基金项目 41404039

    详细信息
      作者简介:

      林松(1982-),男,工程师,硕士,主要研究方向为工程地震、工程物探

      通讯作者:

      唐启家

    • 中图分类号: P315

    Analysis and Characteristics of Faults around Danjiangkou Reservoir, West Hubei Province

    • 摘要: 鄂西地区位于中国大陆构造演化的关键节点上,地质构造十分复杂,而其中的丹江口水库区域更是我国南水北调工程的核心区域.在此处开展断裂构造研究对于深化南水北调工程的地震安全系统的建设具有重要意义.利用浅层地震反射波勘探技术对丹江口水库周边的3条主要断裂,即丹江、两郧和白河-谷城断裂进行分析,将各断裂内的断层构造进行地震剖面成像,得到了0~300 m深度范围内的断层结构特征.研究结果显示,3条断裂内的断层多为北东走向,丹江和白河-谷城断裂内的断层型态以正断层为主,但两郧断裂以逆断层为主,此特征可能与水库蓄水后,局部应力分布受到影响有关.研究成果不仅刻画出鄂西丹江口地区的断层形态,同时也对将来深入剖析此区域内背景应力及其周边构造单元之间的关系提供了重要的地震学参考资料.

       

    • 图  1  研究区域地质构造简图

      F1.丹江断裂;F2.两郧断裂;F3.白河-谷城断裂;Ⅰ.赵岗测线;Ⅱ.郧西盆地测线;Ⅲ.郧县盆地测线;Ⅳ.潭口水库测线;Ⅰ1.中秦岭褶皱带;Ⅰ2.南秦岭褶皱带;Ⅰ3.南襄断陷;Ⅱ1.上扬子台褶带;Ⅱ2.鄂中褶断

      Fig.  1.  A diagram of geological structures in the study area

      图  2  丹江断裂浅层地震深度剖面及地质解译图(赵岗测线Ⅰ)

      Fig.  2.  Geological and fault structures in the Danjiang fault zone (Zhaogang arrat Ⅰ)

      图  3  丹江断裂赵岗Ⅰ测线钻孔联合剖面

      Fig.  3.  Combined borehole section in the Danjiang rupture zone(Zhaogang array Ⅰ)

      图  4  丹江断裂浅层地震深度剖面及地质解译图(赵岗测线Ⅱ)

      Fig.  4.  Geological and fault structures in the Danjiang rupture zone (Zhaogang array Ⅱ)

      图  5  两郧断裂浅层地震深度剖面及地质解译图(郧县盆地柳陂测线)

      Fig.  5.  Geological and fault structures in the Liangyun fault zone (Liubei part of Yunxian basin array)

      图  6  两郧断裂柳陂测线钻孔联合剖面

      Fig.  6.  Combined borehole section in the Liangyun fault zone (Liubei array)

      图  7  两郧断裂浅层地震深度剖面及地质解译图(郧县盆地张家槽测线)

      Fig.  7.  Geological and fault structures in the Liangyun fault zone (Zhangjiacao part of Yunxian basin array)

      图  8  两郧断裂-浅层地震深度剖面及地质解译图(郧西盆地四堰坪测线)

      Fig.  8.  Geological and fault structures in the Liangyun fault zone (Siyanping array in Yunxi basin)

      图  9  白河-谷城断裂浅层地震深度剖面及地质解译图(潭口水库测线)

      Fig.  9.  Geological and fault structures in the Baihe-Gucheng zone (Tankou reservoir array)

      表  1  研究区域地层系统划分

      Table  1.   The stratigraphic classfication in the study area

      表  2  几种介质的物性参数

      Table  2.   Physical parameters of several media

      介质名称 密度(g/cm3) P波速度(m/s)
      粉质粘土 1.4 450~800
      砂砾石 2.0 500~1500
      砾岩 1.5~2.4 1 500~3 500
      粉砂岩 2.1~3.3 1 500~2 500
      灰岩 2.3~3.3 2 500~6 000
      花岗岩 26~2.75 4 500~6 500
      下载: 导出CSV

      表  3  研究区域内测线信息

      Table  3.   Data of measuring line in the study area

      测线名称测线起点位置坐标 测线终点位置坐标测线长度
      (m)
      纬度(°) 经度(°) 纬度(°) 经度(°)
      赵岗测线Ⅰ 32.54310 111.6624 32.53944 111.6613446
      赵岗测线Ⅱ 32.54064 111.6626 32.53080 111.66591 178
      柳陂测线 32.82233 110.7521 32.82714 110.76071 012
      张家槽测线 32.83897 110.7157 32.85303 110.72631 856
      四堰坪测线 33.01753 110.4371 33.01537 110.4369238
      潭口水库测线 32.25109 111.4151 32.25437 111.4183478
      下载: 导出CSV

      表  4  浅层反射结果统计

      Table  4.   Shallow reflection results

      剖面名称测线名称断点位置(m)推测断距(m)断点埋深(m)倾向错断性质
      丹江断裂赵岗测线Ⅰ1201012南西正断
      2201025北东正断
      2801020北东正断
      赵岗测线Ⅱ295530北东正断
      8651020北东正断
      10301032南西正断
      两郧断裂
      郧县盆地
      柳陂测线210340北东逆断
      565320北东逆断
      张家槽测线2251075北东逆断
      10801050南西逆断
      16201060北东逆断
      两郧断裂
      郧西盆地
      四堰坪测线110520南西逆断
      155518南西逆断
      白河-谷城断裂潭口水库测线210320北东正断
      下载: 导出CSV
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    • 收稿日期:  2017-01-02
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