鄂尔多斯地块周缘垂直形变场负位错反演与应变积累研究
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摘要
利用鄂尔多斯地块及其周缘1970～2014年的垂直形变速率场资料,借助负位错反演研究该区域长期应变积累。结果表明,地块东北缘山西断陷带中北段年均能量积累增量、剪应力强度都较高,西南缘六盘山断裂与渭河断裂西段次之;山西断陷带中南段至晋陕交界处年均剪应力强度较高且显示一定程度的能量积累;西秦岭构造区尤其西秦岭北缘断裂西段、晋冀蒙交界区也反映一定程度的能量积累特性。
Using the rate data of vertical deformation field from 1970 to 2014 at the surroundings of Ordos block, with the help of negative dislocation inversion, we study the long-term strain accumulation. The results show that, the first average annual growth rate of energy accumulation and shear stress is the middle-northern segment of Shanxi fault belt at the northeastern margin of Ordos block, the second is the Liupanshan fracture and the western segment of Weihe fracture at the southwestern margin of Ordos block. The segments with high shear stress and relatively lower energy accumulation are the middle-southern segment of Shanxi fault belt and the border between Shanxi and Shaanxi. The western Qinling mountains tectonic area, especially the western segment of the northern margin fault of the west Qinling mountains, and the border area between Shanxi, Hebei and Inner Mongolia, also reflect the characteristics of energy accumulation.
Using the rate data of vertical deformation field from 1970 to 2014 at the surroundings of Ordos block, with the help of negative dislocation inversion, we study the long-term strain accumulation. The results show that, the first average annual growth rate of energy accumulation and shear stress is the middle-northern segment of Shanxi fault belt at the northeastern margin of Ordos block, the second is the Liupanshan fracture and the western segment of Weihe fracture at the southwestern margin of Ordos block. The segments with high shear stress and relatively lower energy accumulation are the middle-southern segment of Shanxi fault belt and the border between Shanxi and Shaanxi. The western Qinling mountains tectonic area, especially the western segment of the northern margin fault of the west Qinling mountains, and the border area between Shanxi, Hebei and Inner Mongolia, also reflect the characteristics of energy accumulation.
引文
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[14] 张希,张四新,王双绪,等.北祁连-河西地区强震地点预测[J].大地测量与地球动力学,2005,25(2):40-46(Zhang Xi,Zhang Sixin,Wang Shuangxu,et al.Prediction of Place of Strong Earthquake in Northern Qilian-Hexi Area[J].Journal of Geodesy and Geodynamics,2005,25(2):40-46)
[15] 张希,王庆良,唐红涛,等.汶川地震孕震背景与同震变化的铲形断层位错模拟[J].地球学报,2011,32(2):189-194(Zhang Xi,Wang Qingliang,Tang Hongtao,et al.The Simulation on Listric-Fault Dislocation Background and Co-Seismic Deformation of the Wenchuan Earthquake[J].Acta Geoscientica Sinica,2011,32(2):189-194)
[16] 邓起东,张培震,冉勇康,等.中国活动构造基本特征[J].中国科学:D辑,2002,32(12):1 020-1 030(Deng Qidong,Zhang Peizhen,Ran Yongkang,et al.Basic Characteristics of Chinese Active Fractures[J].Science in China:Series D,2002,32(12):1 020-1 030)
[17] 江在森,丁平,王双绪,等.中国西部大地形变监测与地震预测[M].北京:地震出版社,2001(Jiang Zaisen,Ding Ping,Wang Shuangxu,et al.Crustal Deformation Measurement and Earthquakes Prediction[M].Beijing:Seismological Press,2001)
[18] 张希,郝明,贾鹏,等.全国主要构造区GPS水平运动负位错反演与应变积累特性[J].地震研究,2013,35(1):1-8(Zhang Xi,Hao Ming,Jia Peng,et al.Inversion of Negative Dislocation for GPS Horizontal Movement and Features of Strain Accumulation in Main Tectonic Areas of China [J].Journal of Seismological Research,2013,35(1):1-8)
[19] 张希,张四新,贾鹏,等.鄂尔多斯地块周缘地区构造活动与应变积累特征研究[J].大地测量与地球动力学,2018,38(4):331-337(Zhang Xi,Zhang Sixin,Jia Peng,et al.Study on the Characteristics of Tectonic Activities and Strain Accumulation at the Surroundings of Ordos Block[J].Journal of Geodesy and Geodynamics,2018,38(4):331-337)
[20] 徐锡伟,吴熙彦,于贵华,等.中国大陆高震级地震危险区判定的地震地质学标志及其应用[J].地震地质,2017,39(2):219-275(Xu Xiwei,Wu Xiyan,Yu Guihua,et al.Seismo-Geological Signatures for Identifying M≥7.0 Earthquake Risk Areas and Their Premilimary Application in Mainland China[J].Seismology and Geology,2017,39(2):219-275)
[2] 张培震,邓起东,张国民,等.中国大陆的强震活动与活动地块[J].中国科学:D辑,2003,33(增1):12-19(Zhang Peizhen,Deng Qidong,Zhang Guomin,et al.Strong Earthquake Activities and Active Blocks in Chinese Mainland[J].Science in China:Series D,2003,33(S1):12-19)
[3] 陈小斌,臧绍先,刘永岗,等.鄂尔多斯地块的现今水平运动状态及其与周缘地块的相互作用[J].中国科学院研究生院学报,2005,22(3):309-314(Chen Xiaobin,Zang Shaoxian,Liu Yonggang,et al.Horizontal Movement of Ordos Block and the Interaction of Ordos Block and Adjacent Blocks[J].Journal of the Graduate School of the Chinese Academy of Sciences,2005,22(3):309-314)
[4] Hao M,Wang Q L,Cui D X,et al.Present-Day Crustal Vertical Motion around the Ordos Block Constrained by Precise Leveling and GPS Data[J].Surveys in Geophysics,2016,37(5):923-936
[5] Matsu’ura M,Jackson D D,Cheng A.Dislocation Model for Aseismic Crustal Deformation at Hollister,California[J].Journal of Geophysical Research,1986,91(B12):12 661-12 674
[6] Okada Y.Surface Deformation Due to Shear and Tensile Faults in a Half-Space[J].Bulletin of the Seismological Society of America,1985,75 (4):1 135-1 154
[7] 伍吉仓,许才军.利用GPS资料反演华北块体运动的负位错模型参数[J].武汉大学学报:信息科学版,2002,27(4):352-357(Wu Jicang,Xu Caijun.Negative Dislocation Model Parameters Inverted from GPS Data in North China[J].Geomatics and Information Science of Wuhan University,2002,27(4):352-357)
[8] 张希,江在森,王琪,等.1999～2001年青藏块体东北缘地壳水平运动的非震反位错模型及变形分析[J].地震学报,2003,25(4):374-381(Zhang Xi,Jiang Zaisen,Wang Qi,et al.Aseismic Negative Dislocation Model and Deformation Analysis of 1999-2001 Crustal Horizontal Movement in the Northeastern Margin of Qinghai-Tibet Block[J].Acta Seismologica Sinica,2003,25(4):374-381)
[9] 崔笃信,王庆良,胡亚轩,等.用GPS数据反演海原断裂带断层滑动速率和闭锁深度[J].地震学报,2009,31(5):516-525(Cui Duxin,Wang Qingliang,Hu Yaxuan,et al.Inversion of GPS Data for Slip Rates and Locking Depths of the Haiyuan Fault[J].Acta Seismologica Sinica,2009,31(5):516-525)
[10] 张希,江在森,王琪,等.青藏块体东北缘弹性块体边界负位错反演与强震地点预测[J].地震学报,2005,27(6):620-629(Zhang Xi,Jiang Zaisen,Wang Qi,et al.Inversion for Negative Dislocation on Elastic Block Boundaries along the Northeast Margin of Qinghai-Xizang Block and Prediction for Strong Earthquake Location[J].Acta Seismologica Sinica,2005,27(6):620-629)
[11] 张希,崔笃信,郝明,等.全国主要构造区近期应变积累动态演化研究[J].地震工程学报,2014,36(1):61-68(Zhang Xi,Cui Duxin,Hao Ming,et al.Research on Dynamic Evolution of Strain Accumulation in the Main Tectonic Areas of China[J].China Earthquake Engineering Journal,2014,36(1):61-68)
[12] 赵静,牛安福,李强,等.陇西块体周边断层闭锁程度与滑动亏损特征研究[J].地震研究,2016,39(3):352-358(Zhao Jing,Niu Anfu,Li Qiang,et al.Study on Dynamic Characteristics of Fault Locking and Fault Slip Deficit in the Faults around the Longxi Block[J].Journal of Seismological Research,2016,39(3):352-358)
[13] 张希,张四新,王双绪.昆仑山口西8.1级地震前后地壳垂直运动的负位错模型[J].地震研究,2004,27(2):153-158(Zhang Xi,Zhang Sixin,Wang Shuangxu.Negative Dislocation Model for Vertical Crustal Movement before and after MS8.1 Earthquake in the West of Kunlun Mountain Pass[J].Journal of Seismological Research,2004,27(2):153-158)
[14] 张希,张四新,王双绪,等.北祁连-河西地区强震地点预测[J].大地测量与地球动力学,2005,25(2):40-46(Zhang Xi,Zhang Sixin,Wang Shuangxu,et al.Prediction of Place of Strong Earthquake in Northern Qilian-Hexi Area[J].Journal of Geodesy and Geodynamics,2005,25(2):40-46)
[15] 张希,王庆良,唐红涛,等.汶川地震孕震背景与同震变化的铲形断层位错模拟[J].地球学报,2011,32(2):189-194(Zhang Xi,Wang Qingliang,Tang Hongtao,et al.The Simulation on Listric-Fault Dislocation Background and Co-Seismic Deformation of the Wenchuan Earthquake[J].Acta Geoscientica Sinica,2011,32(2):189-194)
[16] 邓起东,张培震,冉勇康,等.中国活动构造基本特征[J].中国科学:D辑,2002,32(12):1 020-1 030(Deng Qidong,Zhang Peizhen,Ran Yongkang,et al.Basic Characteristics of Chinese Active Fractures[J].Science in China:Series D,2002,32(12):1 020-1 030)
[17] 江在森,丁平,王双绪,等.中国西部大地形变监测与地震预测[M].北京:地震出版社,2001(Jiang Zaisen,Ding Ping,Wang Shuangxu,et al.Crustal Deformation Measurement and Earthquakes Prediction[M].Beijing:Seismological Press,2001)
[18] 张希,郝明,贾鹏,等.全国主要构造区GPS水平运动负位错反演与应变积累特性[J].地震研究,2013,35(1):1-8(Zhang Xi,Hao Ming,Jia Peng,et al.Inversion of Negative Dislocation for GPS Horizontal Movement and Features of Strain Accumulation in Main Tectonic Areas of China [J].Journal of Seismological Research,2013,35(1):1-8)
[19] 张希,张四新,贾鹏,等.鄂尔多斯地块周缘地区构造活动与应变积累特征研究[J].大地测量与地球动力学,2018,38(4):331-337(Zhang Xi,Zhang Sixin,Jia Peng,et al.Study on the Characteristics of Tectonic Activities and Strain Accumulation at the Surroundings of Ordos Block[J].Journal of Geodesy and Geodynamics,2018,38(4):331-337)
[20] 徐锡伟,吴熙彦,于贵华,等.中国大陆高震级地震危险区判定的地震地质学标志及其应用[J].地震地质,2017,39(2):219-275(Xu Xiwei,Wu Xiyan,Yu Guihua,et al.Seismo-Geological Signatures for Identifying M≥7.0 Earthquake Risk Areas and Their Premilimary Application in Mainland China[J].Seismology and Geology,2017,39(2):219-275)
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