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汶川地区区域构造应力场特征及汶川MS8.0地震对周围主要断层面的影响

何金 许鑫 吴彪 刘晓磊 杨东辉 路彤

何金, 许鑫, 吴彪, 刘晓磊, 杨东辉, 路彤. 汶川地区区域构造应力场特征及汶川MS8.0地震对周围主要断层面的影响[J]. 地震科学进展, 2022, (3): 97-109. doi: 10.19987/j.dzkxjz.2021-078
引用本文: 何金, 许鑫, 吴彪, 刘晓磊, 杨东辉, 路彤. 汶川地区区域构造应力场特征及汶川MS8.0地震对周围主要断层面的影响[J]. 地震科学进展, 2022, (3): 97-109. doi: 10.19987/j.dzkxjz.2021-078
He Jin, Xu Xin, Wu Biao, Liu Xiaolei, Yang Donghui, Lu Tong. Characteristics of regional tectonic stress field in Wenchuan area and the effect of Wenchuan MS8.0 earthquake on surrounding major fault surfaces[J]. Progress in Earthquake Sciences, 2022, (3): 97-109. doi: 10.19987/j.dzkxjz.2021-078
Citation: He Jin, Xu Xin, Wu Biao, Liu Xiaolei, Yang Donghui, Lu Tong. Characteristics of regional tectonic stress field in Wenchuan area and the effect of Wenchuan MS8.0 earthquake on surrounding major fault surfaces[J]. Progress in Earthquake Sciences, 2022, (3): 97-109. doi: 10.19987/j.dzkxjz.2021-078

汶川地区区域构造应力场特征及汶川MS8.0地震对周围主要断层面的影响

doi: 10.19987/j.dzkxjz.2021-078
基金项目: 河北省地震星火计划(DZ202108090042)资助。
详细信息
    作者简介:

    何金(1996-),男,助理工程师,主要从事地震监测方面的研究工作。E-mail:766700900@qq.com

    通讯作者:

    许鑫(1995-),男,硕士研究生,主要从事构造应力场、应力触发方面的研究工作。E-mail:xuxin_edu@163.com

  • 中图分类号: P315.2

Characteristics of regional tectonic stress field in Wenchuan area and the effect of Wenchuan MS8.0 earthquake on surrounding major fault surfaces

  • 摘要: 为剖析2008年汶川MS8.0地震对后期地震的影响及发震区域构造应力场特征,首先利用2008年5月12日—2013年4月19日汶川地震及其邻区的1660条震源机制解,同时采用同一地震多个震源机制中心解的方法筛去重复地震事件的震源机制解,最终获得911个震源机制解。其次,通过网格搜索法分段反演出区域构造应力场。结果显示:东北区主要受WNW-ESE向的挤压,西南区受W-E向的挤压,中区受WSW-ENE向的挤压。西南到东北主压应力轴方向有所变化,这可能与龙门山地区受到来自印度板块北北东方向的俯冲推挤、四川盆地的阻挡和巴颜喀拉块体东南向挤压的联合作用有关。然后,基于USGS给出的汶川MS8.0地震的破裂模型,计算出该地震对附近强震的触发关系,结果表明,本次汶川地震对同属龙门山断裂西南端的芦山地震触发作用明显,对位于东昆仑断裂上的玛多地震也有一定的触发作用。最后,计算汶川MS8.0地震对周围断层的同震库仑应力变化,发现本次地震造成龙门山断裂南北两端、秦岭南缘断裂、鲜水河断裂东南端、东昆仑断裂、白玉断裂的库仑破裂应力增加,龙门山断裂南北两端和秦岭南缘断裂增加最为明显,对分析地震危险性有一定的参考意义。

     

  • 图  1  2008年5月12日—2013年4月19日汶川地震后ML>3.0地震的M-t

    Figure  1.  M-t diagram with magnitude greater than 3.0 after Wenchuan earthquake from May 12, 2008 to April 19, 2013

    图  2  汶川地震分区图

    Figure  2.  Zoning map of Wenchuan earthquake

    图  3  分区的应力场及辐射花样图

    (a、c、e) 黑色弧线是中心震源机制的2个节面,绿色覆盖区是不确定范围;紫色弧线是机构和学者给出的震源机制的节面;红色、黄色和蓝色的封闭区分别表示震源机制解的P轴、B轴和T轴,对应颜色的封闭曲线表示其对应的不确定范围;绿点、蓝点和黑点分别为各个机构和学者给出震源机制的P轴、B轴和T轴;此图投影方式为下半球等面积投影;(b、d、f) 黄色为压缩区域,蓝色为膨胀区域

    Figure  3.  Stress field and radiation pattern of zoning

    (a,c,e) The black arc is the two nodal planes of the central focal mechanism,and the green coverage area represents the uncertainty range;The purple arc represents the nodal plane of the focal mechanism given by the mechanism and scholars;The closed areas in red,yellow and blue represent the P-axis,B-axis and T-axis of focal mechanism solution respectively,and the closed curve represents its corresponding uncertainty range;Green dot,blue dot and black dot are the P-axis,B-axis and T-axis of focal mechanism given by various institutions and scholars respectively;The projection method of this figure is equal area projection of the lower hemisphere; (b,d,f) Yellow is the extrusion area and blue is the expansion area

    图  4  2008年汶川地震14 km深度处在周围主要断裂上产生的库仑破裂应力变化

    黑色和绿色震源机制解分别为走滑和逆冲型;填充在断层上的颜色表示库仑破裂应力变化的大小,红色表示增加,蓝色表示减小,大小如色标所示

    Figure  4.  Variation of Coulomb fracture stress on the surrounding main faults at the depth of 14 km of Wenchuan earthquake in 2008

    The black and green focal mechanism solutions in the figure are strike slip and thrust type respectively; The color filled on the fault indicates the change of Coulomb fracture stress,red indicates increase,blue indicates decrease,and the size is shown in the color code

    图  5  汶川地震产生的应力场在深度14 km处的水平面投影

    图中白色箭头、黑色箭头分别表示主张应力(最大主应力)和主压应力(最小主应力);底色为面应力分量,红色为膨胀区,蓝色为压缩区

    Figure  5.  Horizontal projection of stress field generated by Wenchuan earthquake at the depth of 14 km

    The white arrow and black arrow in the figure represent the principal tensile stress (maximum principal stress) and principal compressive stress (minimum principal stress) respectively; The background color is the surface stress component, red is the expansion zone and blue is the compression zone

    图  6  2008年汶川地震震前(a)及震后(b)构造应力场的水平分量

    黑色箭头和白色箭头分别表示水平面最小主应力和最大主应力的方向;底色表示面应力

    Figure  6.  Horizontal components of tectonic stress field before (a) and after (b) the 2008 Wenchuan earthquake

    The black arrow and the white arrow indicate the direction of the minimum principal stress and the maximum principal stress in the horizontal plane respectively;The background color indicates surface stress

    表  1  震源机制解划分标准[20]

    Table  1.   Division criteria of focal mechanism solutions[20]

    类型P 轴倾伏角B 轴倾伏角T 轴倾伏角
    正断型(NF)≥52°≤35°
    正走滑型(NS)40°≤倾角<52°≤20°
    走滑型(SS)≤20°≥45°<40°
    <40°≥45°≤20
    逆走滑型(TS)≤20°40°≤倾角<52°
    逆冲型(TF)≤35°≥52°
    不确定型(U)上述类型之外的震源机制解
    下载: 导出CSV

    I  同一地震多个震源机制的中心解结果

    I.   Central solution results of multiple focal mechanisms of the same earthquake

    序号日期时间东经/°北纬/°震级节面I最小三维空间旋转角
    的标准差/°
    所用参考
    资料
    走向/°倾向/°滑动角/°
    12008-05-1211:11:00103.531.36.126.687.9−162.410.4AKC
    22008-05-1213:40:52103.531.05.2243.964.377.546.1AKC
    32008-05-1214:28:00103.431.08.012.363.682.715.9EJG
    42008-05-1215:05:15103.831.25.2126.7−19.9221.846.3AK
    52008-05-1215:28:26103.631.15.1296.264.7−28.646.7AK
    62008-05-1218:23:33103.331.04.8201.251.0103.312.2EFH
    72008-05-1219:11:16103.431.35.9207.190.0146.532.9DEFHJ
    82008-05-1219:33:09105.332.64.3353.553.1−41.242.0FH
    92008-05-1219:41:05105.032.44.3162.463.6−13.112.0FH
    102008-05-1219:52:22105.332.64.3107.182.4−19.655.5FH
    112008-05-1220:11:28103.831.44.0355.787.0−22.312.2FH
    122008-05-1220:15:28104.431.94.640.725.1150.87.7FH
    132008-05-1220:23:14105.332.64.2322.459.341.211.0FH
    142008-05-1220:29:28103.831.43.9199.053.362.516.4FH
    152008-05-1220:54:28103.531.33.9119.582.99.314.3FH
    162008-05-1221:02:02103.331.03.9176.572.5129.44.9FH
    172008-05-1221:07:07103.431.23.7199.441.764.47.1FH
    182008-05-1221:32:06103.831.34.0233.686.9−111.745.0FH
    192008-05-1221:40:52103.431.15.0223.387.1−93.913.1DEFH
    202008-05-1222:09:23104.531.94.1296.278.0101.840.5FH
    212008-05-1222:46:03105.532.75.068.981.2−144.08.9DEFHJ
    222008-05-1223:05:16103.631.24.8301.138.0−189.452.6DEFH
    232008-05-1223:05:28103.531.34.7248.083.240.648.8DFH
    242008-05-1223:28:45103.431.05.117.825.7151.317.8DEFHJ
    252008-05-1300:28:27103.631.24.360.149.5101.534.6FH
    262008-05-1301:01:22103.430.93.8169.120.3−138.512.3FH
    272008-05-1301:03:05103.431.25.031.557.5101.417.9EF
    282008-05-1301:29:03103.431.34.85.287.7−140.228.1DEFH
    292008-05-1301:54:30103.431.34.931.880.8−162.313.0DEFH
    302008-05-1302:46:07105.032.44.2335.468.7165.229.9FH
    312008-05-1304:08:44103.831.45.55.656.873.614.6DEFGHJ
    322008-05-1304:45:36104.331.85.026.335.986.212.5DEFHJ
    332008-05-1305:08:08103.231.34.2240.855.9−136.512.0DFH
    342008-05-1307:07:05103.331.06.1244.545.4140.231.8ACK
    352008-05-1307:46:13103.431.35.0118.266.0−1.217.1DEFHJ
    362008-05-1307:54:38103.431.35.1200.584.0−154.731.3DEFH
    372008-05-1308:22:07103.831.34.112.168.948.71.7FH
    382008-05-1309:07:28103.731.43.728.643.458.79.6FH
    392008-05-1310:15:12103.931.65.0224.342.6122.945.0DEFJ
    402008-05-1310:33:19103.631.33.949.947.089.93.2FH
    412008-05-1310:59:15103.431.04.244.555.5147.02.8FH
    422008-05-1311:00:19103.531.24.5−7.451.662.121.6FH
    432008-05-1311:48:30103.831.34.1268.344.8115.430.7DFH
    442008-05-1312:45:27103.331.03.8284.988.0−164.54.2FH
    452008-05-1312:50:30103.431.34.2292.260.7−6.438.9AFH
    462008-05-1313:37:17103.531.04.0195.087.4−157.941.8DFH
    472008-05-1315:07:07103.231.06.0221.244.5113.99.4DEFGHJ
    482008-05-1316:20:55103.831.45.339.357.3106.534.9DEFJ
    492008-05-1318:16:04104.331.74.410.654.856.010.8FDH
    502008-05-1318:36:20103.631.34.259.646.975.42.5FH
    512008-05-1320:51:36105.032.34.4346.840.339.815.6DFH
    522008-05-1321:31:22105.032.34.3102.961.9144.95.0DFH
    532008-05-1400:23:33104.331.74.410.555.762.47.3DFH
    542008-05-1403:30:16103.331.14.249.348.4−9.920.6DFH
    552008-05-1403:51:51103.331.04.1187.555.472.716.0DFHJ
    562008-05-1409:09:19103.831.44.214.853.484.110.0DFH
    572008-05-1409:56:27103.531.34.2268.139.132.47.9DFH
    582008-05-1410:54:24310.194.05.334.267.1−164.618.6DFH
    592008-05-1413:54:43104.131.94.9358.779.5132.814.9DEFH
    602008-05-1417:26:30103.931.45.025.138.997.410.1DEFHJ
    612008-05-1418:00:19105.032.44.4228.647.9116.95.5DFH
    622008-05-1501:17:11103.831.54.445.555.099.710.7DFHJ
    632008-05-1501:33:11103.531.34.6197.789.9−174.924.0DFHJ
    642008-05-1503:59:00103.531.14.324.580.2−178.85.1DFHJ
    652008-05-1505:01:02104.131.74.9346.859.860.810.9DEFHJ
    662008-05-1506:10:04103.631.24.8144.076.0−10.118.8DEFH
    672008-05-1513:27:31104.332.04.3110.370.767.010.1DFH
    682008-05-1521:04:04105.632.74.3337.977.8−29.34.7DFH
    692008-05-1605:55:36104.732.34.6350.352.6132.57.5DFHJ
    702008-05-1606:10:22103.931.44.3212.049.1115.334.9DFH
    712008-05-1611:34:13103.931.54.848.769.493.35.5DEFH
    722008-05-1613:25:43103.231.45.8142.977.8−23.86.8DEFGHJ
    732008-05-1618:17:13103.531.34.1264.678.26.837.1DFH
    742008-05-1700:14:37103.431.24.9163.781.1119.727.8DEFH
    752008-05-1701:22:20103.631.24.250.085.714.05.2DFH
    762008-05-1704:15:07104.932.34.273.240.874.634.9FHJ
    772008-05-1704:16:43103.531.34.94.260.2−160.636.6EFHJ
    782008-05-1704:29:03103.331.44.231.584.5168.47.0DFH
    792008-05-1706:33:06105.032.34.3233.266.2110.125.4DFHJ
    802008-05-1707:23:02103.731.34.3208.768.7−117.838.7FHJ
    812008-05-1708:28:55103.831.33.9190.760.7−69.739.3DFHK
    822008-05-1721:32:06104.632.14.5315.440.88.47.8DFHJ
    832008-05-1801:08:12104.932.35.9233.846.492.28.1DEFGHJ
    842008-05-1804:26:02103.531.24.1243.974.03.529.0DFH
    852008-05-1808:45:55104.031.94.138.088.2107.63.0DFH
    862008-05-1809:04:51103.631.14.211.761.5177.99.0DFHJ
    872008-05-1912:08:38105.032.24.649.850.0101.516.6FHJ
    882008-05-1914:06:24105.332.65.3220.384.9140.929.9DEFHJ
    892008-05-2001:52:37104.932.34.937.946.871.910.9DEFHJ
    902008-05-2012:17:37103.330.84.1136.378.541.09.8DFH
    912008-05-2014:54:07104.231.84.1140.484.449.890.1FHJ
    922008-05-2117:33:04105.132.44.4243.186.2163.57.5FHJ
    932008-05-2121:59:03103.931.44.4206.530.5102.613.3DFHJ
    942008-05-2215:18:36103.631.24.9220.974.6−113.619.7DEFH
    952008-05-2219:22:09105.432.74.2120.168.930.620.8FHJ
    962008-05-2223:00:06104.431.94.4136.681.453.310.8DFHJ
    972008-05-2301:37:34103.631.34.6229.331.0135.04.6DFHJ
    982008-05-2308:05:04103.631.24.598.733.3−37.75.5DFH
    992008-05-2309:23:13103.531.24.135.084.5−174.519.3DFHJ
    1002008-05-2401:53:26105.232.54.133.486.761.710.9FHJ
    1012008-05-2516:21:44105.332.66.360.482.1178.214.0DEFGHJ
    1022008-05-2608:39:38103.330.84.531.776.989.819.5DFHJ
    1032008-05-2716:03:09105.632.85.2338.977.9−1.24.4DEFGHJ
    1042008-05-2716:37:45105.632.85.683.970.3−158.617.3DEFGHJ
    1052008-05-2721:59:33105.232.64.7297.884.9−18.211.2DFHJ
    1062008-05-2800:46:06104.632.24.1334.562.0129.05.8DFHJ
    1072008-05-2801:35:04105.432.74.8106.479.184.414.9DEFHJ
    1082008-05-2912:48:37105.432.64.5116.078.381.85.2DFHJ
    1092008-05-2915:10:13103.731.44.31.043.938.36.8DFH
    1102008-05-3114:22:35105.032.44.223.646.683.716.4FHJ
    1112008-05-3115:34:07105.432.74.1169.240.862.819.3FHJ
    1122008-06-0111:23:39104.031.64.3180.020.299.015.3FHJ
    1132008-06-0512:41:03105.032.45.047.655.291.98.2DEFHJ
    1142008-06-0514:02:11105.432.74.3169.173.395.629.3FHJ
    1152008-06-0619:03:39103.731.34.311.481.827.99.3DFHJ
    1162008-06-0622:38:36103.331.14.3197.855.885.86.8FHJ
    1172008-06-0708:48:06103.431.24.6350.278.2−105.37.3DFHJ
    1182008-06-0715:32:31105.132.53.994.967.848.021.8DFH
    1192008-06-0718:42:02105.732.54.6−1.988.48.88.8DFHJ
    1202008-06-0818:51:07104.231.95.092.941.14.215.7DEFHJ
    1212008-06-1100:27:07105.732.84.4145.387.5−8.98.1DFHJ
    1222008-06-1106:23:08103.330.94.9191.228.475.38.4DEFHJ
    1232008-06-1500:11:14103.731.24.7314.062.8154.917.1ACK
    1242008-06-1508:11:10103.631.24.751.070.821.119.2DFHJ
    1252008-06-1713:14:22104.131.74.3215.049.494.312.2DFH
    1262008-06-1721:32:02104.331.94.16.864.3167.616.4FHJ
    1272008-06-1806:43:04103.431.34.1278.182.9−27.320.0FHJ
    1282008-06-1910:55:14103.531.24.4230.449.2−21.317.9DFHJ
    1292008-06-1920:27:23103.731.14.7235.681.983.021.6AK
    1302008-06-2004:27:46103.531.24.5246.177.087.010.9DF
    1312008-06-2305:38:31105.132.44.0241.850.693.316.7DFHJ
    1322008-06-2708:55:35103.431.14.23.676.8−177.78.5DFHJ
    1332008-06-2802:20:42103.331.54.5234.585.7−167.19.8DFHJ
    1342008-06-2805:42:06104.932.34.669.166.7−99.811.6DFHJ
    1352008-06-2907:55:10104.532.14.3329.254.0103.88.9DFHJ
    1362008-07-0203:57:55103.931.44.818.587.467.824.4DFJ
    1372008-07-0304:08:03103.731.24.068.771.5−147.831.3AK
    1382008-07-0506:10:55104.131.74.6148.847.470.336.3DFJ
    1392008-07-0515:00:34104.131.74.4140.971.842.138.7FHJ
    1402008-07-0602:50:09104.131.64.548.745.588.310.4DFJ
    1412008-07-0820:12:44103.931.44.7183.153.780.712.6DFHJ
    1422008-07-1503:56:31104.031.64.4146.188.9−48.911.3DFHJ
    1432008-07-1517:26:08104.031.64.8175.972.3−54.17.6DEFHJ
    1442008-07-2415:09:14105.532.85.8130.756.545.945.2DEFGHJ
    1452008-08-0116:32:51104.732.16.1217.871.5107.611.4DEFJ
    1462008-08-0202:12:16105.232.54.878.084.3−170.48.9DFJ
    1472008-08-0221:25:50105.632.84.669.688.7−173.95.9DFJ
    1482008-08-0517:49:10105.532.86.0161.754.089.914.2DFGHJ
    1492008-08-0716:15:32104.632.15.0246.046.3105.16.3DFHJ
    1502008-08-0821:12:18103.931.54.0320.476.039.914.7DF
    1512008-08-1000:31:35105.232.64.032.269.0177.023.9DF
    1522008-08-1305:03:20104.231.84.5100.651.657.33.7DF
    1532008-08-1417:06:24103.431.04.981.282.3176.68.6ACK
    1542008-08-1501:06:39103.231.04.3168.986.01.014.3DF
    1552008-08-1810:22:22103.431.33.9214.383.1155.611.1DF
    1562008-09-1118:30:22103.731.34.1232.146.772.66.2DF
    1572008-09-1201:38:58105.633.04.9324.239.163.919.1DF
    1582008-10-0420:11:46104.131.84.212.565.1120.42.2DF
    1592008-10-1610:08:38103.531.33.9176.387.9165.514.5DF
    1602008-10-1617:46:16103.731.24.342.685.790.23.5DF
    1612008-10-2501:50:25103.931.44.054.067.7120.110.6DF
    1622008-11-0420:43:12104.532.14.3118.453.361.95.0DF
    1632008-11-1414:33:32105.432.84.0151.448.9107.326.8DF
    1642008-11-1606:59:43104.632.24.7260.589.56.53.9DF
    1652008-12-0421:57:32103.431.34.2297.072.0−21.917.1DF
    1662008-12-0711:02:11104.431.74.1121.466.026.65.3DF
    1672008-12-1002:52:42105.432.64.8225.043.284.38.6ADF
    1682008-12-2308:33:11103.131.34.3132.685.5−49.531.2DF
    1692009-01-1219:36:33103.731.13.852.489.9110.37.8BK
    1702009-01-1418:23:37103.231.34.6237.461.7−125.011.6BK
    1712009-01-1502:23:36103.231.34.5109.345.9−48.47.4DF
    1722009-02-0101:36:30105.332.54.0199.247.0128.716.3DF
    1732009-02-1610:11:37103.731.23.677.981.9−64.041.8BK
    1742009-03-0400:21:38104.931.94.3259.358.882.435.0DF
    1752009-03-1913:43:25105.032.34.164.849.084.813.4DF
    1762009-04-0600:47:03104.231.84.3266.573.5−65.03.9DF
    1772009-05-1423:49:28104.832.34.1160.284.5161.612.5DF
    1782009-06-0206:01:36103.631.23.559.584.664.710.9BK
    1792009-06-0219:31:34103.231.33.7211.373.6−132.59.6BK
    1802009-06-3002:03:50104.031.55.171.261.5107.34.4DF
    1812009-06-3013:40:24104.031.54.184.770.7114.64.0DF
    1822009-06-3015:22:19104.031.54.7188.944.851.71.9DF
    1832009-07-2009:50:21103.331.03.5187.965.8144.09.6BK
    1842009-07-3105:50:32103.531.33.57.479.4−145.78.8BK
    1852009-08-0105:54:38104.131.84.140.857.880.710.5DF
    1862009-08-0315:06:38103.731.33.736.685.3−8.528.4BK
    1872009-08-0322:18:16103.631.24.0150.686.9−23.625.7BK
    1882009-08-2601:49:32103.230.63.5220.083.9−83.57.1BK
    1892009-09-0713:11:48103.631.33.614.869.365.210.2BK
    1902009-09-1912:16:39102.730.53.7324.389.932.017.5BK
    1912009-09-1916:54:14105.532.94.723.449.0114.516.2DF
    1922009-10-1821:43:24103.330.93.713.561.293.010.8BK
    1932009-12-0501:43:40104.232.13.9147.588.0170.52.9DF
    1942010-03-2315:52:21103.431.34.0241.470.1−69.648.5BK
    1952010-03-2316:20:54103.431.33.549.953.0−75.512.3BK
    1962010-04-2622:15:56103.431.23.7222.867.577.13.8BK
    1972010-05-2506:11:53103.531.24.9217.759.586.31.2BK
    1982010-05-2514:11:52103.531.24.8225.748.089.811.2DF
    1992010-05-2811:04:52104.131.84.3356.555.0103.03.3DF
    2002010-07-0613:03:41103.330.93.4200.247.477.26.4BK
    2012010-07-1105:24:37104.530.63.5143.675.1−166.92.7BK
    2022010-07-1711:39:37103.430.73.361.757.4135.48.6BK
    2032010-09-1105:07:01103.531.13.346.746.8−52.840.2BK
    2042010-09-1120:16:15103.331.03.5204.788.8−108.812.8BK
    2052010-10-0107:42:47103.431.03.5140.282.643.239.8BK
    2062010-10-1913:28:08103.331.23.4251.751.487.910.9BK
    2072010-10-2502:55:48103.330.94.2152.949.160.728.2BK
    2082011-02-0123:15:28103.431.33.3200.967.8141.714.0BK
    2092011-02-1009:56:47103.431.03.4139.764.433.43.6BK
    2102011-03-0518:31:04103.631.33.7206.787.8160.46.7BK
    2112011-03-2720:18:40103.331.03.4111.252.454.94.7BK
    2122011-04-1603:36:24103.431.23.3106.674.1146.03.7BK
    2132011-04-1909:40:46103.431.13.558.157.7138.933.1BK
    2142011-04-2118:43:57103.230.93.5210.977.3−138.62.0BK
    2152011-04-2913:30:57103.431.03.917.966.686.66.7BK
    2162011-05-0610:48:15103.631.34.1348.050.882.213.3BK
    2172011-10-2620:01:55103.331.03.9181.051.774.85.3BK
    2182011-12-0614:03:13103.531.23.8351.863.1−131.52.6BK
    2192012-01-1801:28:28103.531.23.5210.578.1120.68.9BK
    2202012-02-0802:34:38103.531.03.849.881.8179.034.9BK
    2212012-04-0910:33:17103.231.03.713.650.1119.18.1BK
    2222012-06-3002:51:04103.631.23.6231.968.4−113.24.9BK
    2232012-07-2721:28:14103.430.84.119.649.377.96.2BK
    2242012-10-1902:44:16102.930.14.137.980.7126.25.9BK
    2252012-10-2302:14:26103.731.03.7−0.451.9111.232.3BK
    2262012-12-1115:26:00103.731.33.542.855.788.38.4BK
    2272013-02-1914:17:43105.231.24.9319.489.4−172.62.7BK
    2282013-03-0415:42:19103.431.03.9148.082.434.725.9BK
    2292013-04-0723:51:29103.330.83.841.762.9101.51.8BK
    资料:A为郭祥云等[16]的数据,B为李先瑞手稿数据,C为Tian等[18]的数据,D为中国地震台网数据,E为胡幸平等[12]的数据,F为易桂喜等[14]的数据,G为蒋海昆等[17]的数据,H为郑勇等[11]的数据,J为崔效锋等[13]的数据,K为杨宜海等[15]的数据
    下载: 导出CSV

    表  2  应力场反演结果

    Table  2.   Inversion results of stress field

    分区最大主压应力轴 中间应力轴 最大主张应力轴
    P 轴走向/°P 轴倾伏角/°B 轴走向/°B 轴倾伏角/°T 轴走向/°T 轴倾伏角/°
    东北区281.84—282.901.50—3.00 11.50—13.002.50—3.50 157.79—159.2985.89—86.89
    中区255.31—264.310.99—2.48165.00—174.008.00—11.00−2.42—6.5879.78—82.78
    西南区267.50—270.00−0.50—0.80177.50—180.0036.50—38.00357.50—360.0052.50—54.00
    下载: 导出CSV

    表  3  本研究所用的断层面性质和库仑破裂应力增加段

    Table  3.   Fault plane properties and Coulomb fracture stress increasing section used in this study

    断层名称分段数走向/°倾角/°倾向性质$\Delta {\sigma }_{\mathrm{f}}$/Pa
    龙门山断裂西南端34365NW逆冲258700
    龙门山断裂东北端57665NW右旋走滑9707
    鲜水河断裂东南端432575NE/SW左旋走滑15960
    秦岭南缘断裂28075NE左旋逆走滑46850
    西秦岭北缘69860SW左旋逆走滑4207
    龙日坝断裂东北端14575NW走滑34330
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-10-30
  • 修回日期:  2021-12-08
  • 网络出版日期:  2022-01-14

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