郯庐断裂带中段(沂沭断裂带)电性结构研究与孕震环境
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摘要
穿过郯庐断裂带中段(沂沭断裂带,36°N)所做的大地电磁测深(MT)剖面长约150km.使用Robust技术和远参考道大地电磁方法处理观测数据.通过分析视电阻率、阻抗相位、Swift二维偏离度和区域走向,定性确定测区的电性结构.二维反演解释中选择非线性共轭梯度(NLCG)方法,使用TE、TM两种模式资料联合反演,沿剖面的二维电性结构显示:自西向东,鲁西隆起、郯庐断裂带、胶莱坳陷及鲁东隆起4个电性区块分别对应,鲁东和鲁西隆起区为高阻,郯庐断裂带电性结构复杂,高、低阻相间,胶莱坳陷为低阻(高导)区.沿MT剖面附近曾发生3个地震,其震源区处在电性变化剧烈部位,并在震源区附近存在高导体.
Magnetotelluric (MT) data along about 150km profile has been collected along the profile across the central Tan-Lu fault zone(Yi-Shu fault zone,36°N ).The observational data of this survey are processed by using the Robust method and remote reference technique.Apparent resistivity, impedance phase curves, Skewness and regional strike were anylysed.By means of the NLCG method,2D inversion modeling is performed with the data of two modes TE and TM. The 2D electrical structure along the profile is obtained.The target area can be divided into four electrical conductivity blocks, which separately correspond to the Lu-Xi uplift, Tan-Lu fault zone, Jiao-Lai depression, and Lu-Dong uplift.There is high resistivity in the uplift area of Lu-Xi and Lu-Dong and low resistivity in the depression of Jiao-Lai.The development and occurrence the earthquakes are closely related to the deep electric structure.The earthquake focus area of three earthquakes around the MT profile are significantly heterogeneous, and the high conductivity layer existed near the hypocenter region.
Magnetotelluric (MT) data along about 150km profile has been collected along the profile across the central Tan-Lu fault zone(Yi-Shu fault zone,36°N ).The observational data of this survey are processed by using the Robust method and remote reference technique.Apparent resistivity, impedance phase curves, Skewness and regional strike were anylysed.By means of the NLCG method,2D inversion modeling is performed with the data of two modes TE and TM. The 2D electrical structure along the profile is obtained.The target area can be divided into four electrical conductivity blocks, which separately correspond to the Lu-Xi uplift, Tan-Lu fault zone, Jiao-Lai depression, and Lu-Dong uplift.There is high resistivity in the uplift area of Lu-Xi and Lu-Dong and low resistivity in the depression of Jiao-Lai.The development and occurrence the earthquakes are closely related to the deep electric structure.The earthquake focus area of three earthquakes around the MT profile are significantly heterogeneous, and the high conductivity layer existed near the hypocenter region.
引文
[1] 方仲景,丁梦林,向宏发等.郯庐断裂带基本特征(J).科学通报,1986,31(1) :52～55 Fang Z J,Ding M L,Xiang H F,et al.Basal characteristics of Tanlu Fault Zone(J).Chinese Science Bulletin(in Chinese),1986,31(1) :52～55
[2] 山东地质矿产局.山东区域地质志.北京:地质出版社,1991 Bureau of Geology and Mineral Resources of Shandong Province.Regional Geology of Shsndong Province(in Chinese).Beijing:Geological Publishing House,1991
[3] 山东省地方史志编纂委员会.山东省志·地震志.济南:山东人民出版社,1995 Editorial Board of Shandong Province Annals.Annals of Shandong Province·Earthquake(in Chinese).Jinan:Peoples of Shandong Press,1995
[4] 许杰,高占武,孙建宝等.1969年渤海7． 4级地震区地质构造的初步研究.中国地震,2001,17(2) :121～133 Xu J,Gao Z W,Sun J B,et al.Analysis of Structures in 1969 Bohai Sea M_s 7． 4 Earthquake Area and Discussion about the Causative Structure.Earthquake Research in China(in Chinese),2001,17(2) :121～133
[5] 高祥林.渤海中部郯庐断裂带的近期活动与渤海新近世纪断裂.地质科学,2006,41(2) :355～364 Gao X L.Recent activites of the Tan-Lu fault zone in the central Bohai sea and newly generated faults during neogene in Bohai.Chinese Journal of Geology(in Chinese),2006,41(2) :355～364
[6] 李家灵,晁洪太,崔昭文等.郯庐活断层的分段及其大震危险性分析.地震地质,1994,16(2) :121～126 Li J L,Chao H T,Cui Z Wet al.Segmentation of active fault along the Tanlu fault zone and evaluation of strong earthquake risk.Seismology and Geology(in Chinese),1994,16(2) :121～126
[7] 晁洪太,李家灵,崔昭文等.郯庐断裂带潍坊-嘉山段全新世活断层的活动方式与发展模式.地震研究,1997,20(2) :218～226 Chao H T,Li J L,Cui Z Wet al.Mode of motion of the Holocene fault in Weifang-Jiashan segment of the Tanlu fault zone and earthquake generating model.Journal of Seismological Research(in Chinese),1997,20(2) :218～226
[8] 施炜,张岳桥,董树文.郯庐断裂带中段第四纪活动及其分段特征.地球学报,2003,24(1) :11～18 Shi W,Zhang Y Q,Dong S W.Quaternary activity and segmentation behavior of the middle portionofthe Tan-Lu Fault zone.Acta Geoscientia Sinica(in Chinese),2003,24(1) :11～18
[9] Shankland T J,Waff H S.Partial melting and electrical conductivity anomalies in the upper mantle.Rev.Geophys.Space Phys.,1977,19:394～406
[10] 赵国泽,汤吉,梁竞阁等.用大地电磁网法在长春等地探测上地幔电导率结构.地震地质,2001,23(2) :143～152 Zhao G Z,Tang J,Liang J Get al.Measuement of network-MT in two areas of Nechina for study of upper mantle conductivity.Seismology and Geology(in Chinese),2001,23(2) :143～152
[11] 汤吉,王继军,陈小斌等.阿尔山火山区地壳上地幔电性结构初探.地球物理学报,2005,48(1) :196～202 Tang J,Wang J J,Chen X B,et al.Preliminary investigation for electric conductivity structure of the crust and upper mantle beneath the Aershan volcano area.Chinese J.Geophys.(in Chinese),2005,48(1) :196～202
[12] 肖骑彬,赵国泽,詹艳等.大别山超高压变质带深部电性结构及其动力学意义初步研究.地球物理学报,2007,50(3) :812～822 Xiao Q B,Zhao G Z,Zhan Y,et al.A preliminary study on electrical structure and dynamics of the ultra-high pressure metamorphic belt beneath the Dabie Mountains.Chinese J.Geophys.,(in Chinese),2007,50(3) :812～822
[13] 肖骑彬,赵国泽,王继军等.苏鲁造山带及邻区深部电性结构研究.中国科学(D),2008,38(10) :1258～1267 Xiao Q B,Zhao G Z,Wang J J,et al.Study on deep electrical conductivity structure of SuLu orogenic belt and its neighbouring region.Science in China(Series D),2008,38(10) :1258～1267
[14] 赵国泽,汤吉,詹艳等.青藏高原东北缘地壳电性结构和地块变形关系研究.中国科学(D),2004,34(10) :908～918 Zhao G Z,Tang J,Zhan Y,et al.Relation between electricity structure of the crust and deformation of crustal blocks on the northeastern margin of Qinghai-Tibet plateau.Science in China(Series D),2005,34(10) :908～918
[15] 赵国泽,詹艳,陈小斌等.电磁法在地下水探查中的应用.工程地球物理学报,2004,1(3) :220～225 Zhao G Z,Zhan Y,Chen X B,et al.Detection on the ground whater using EM method.Chinese Journal of Engineer Geophysics(in Chinese),2004,1(3) :220～225
[16] 赵国泽,刘铁胜,江钊等.山西阳高河北容城剖面大地电磁资料的二维反演解释.地球物理学报,1997,40(1) :39～46 Zhao G Z,Liu T S,Jiang Z,et al.Investigation on MT data along Yanggao-Rongcheng profile by two-dimensional inversion.Chinese J.Geophys.(in Chinese),1997,40(1) :39～46
[17] 赵国泽,刘国栋,詹艳等.张北-尚义地震区及其邻区地壳上地幔结构.地震地质,1998,20(2) :155～163 Zhao G Z,Liu G D,Zhan Y,et al.The structure of the crust and upper mantle for the Zhangbei-Shangyi seismic area and its neighbouring region.Seismology and Geology(in Chinese),1998,20(2) :155～163
[18] 赵国泽,陈小斌,肖骑彬等.汶川M_s 8． 0级地震成因三“层次”分析--基于深部电性结构.地球物理学报,2009,52(2) :553～563 Zhao G Z,Chen X B,Xiao Q B,et al.Generation mechanism of Wenchuan strong earthquake of M_s 8． 0 inferred from EM measurements in three levers.Chinese J.Geophys.(in Chinese),2009,52(2) :553～563
[19] 邓前辉,张木生,詹艳等.邢台7． 2级地震震源区的电磁阵列剖面法测量与电性特征研究.地球物理学报,1998,41(2) :218～225 Deng Q H,Zhang M S,Zhan Y,et al.The observation of electromagnetic array profiling and electrical characteristics of the crust in Xingtai Ms7． 2 earthquake area.Chinese J.Geophys.(in Chinese),1998,41(2) :218～225
[20] 徐常芳.中国大陆壳内与上地幔高导层成因及唐山地震机理研究.地学前缘,2003,10(增刊):101～111 The cause of formation of the upper manle and crust high conductive layers in Chinese mainland and the study of Tangshan earthquake.Earth Science Forntiers,2003,10(Suppl):101～111
[21] 詹艳,赵国泽,陈小斌等.宁夏海原大震区西安州-韦州剖面大地电磁探测与研究.地球物理学报,2004,47(2) :274～281 Zhan Y,Zhao G Z,Chen X B,et al.Crustal structure from magnetotelluric profiling in the Haiyuan earthquake area,Ningxia Hui Autonomous Region,China.Chinese J.Geophys.(in Chinese),2004,47(2) :274～281
[22] 詹艳,赵国泽,王继军等.1927年古浪8级大震区及其周边地块的深部电性结构.地球物理学报,2008,51(2) :511～520 Zhan Y,Zhao G Z,Wang J J,et al.Deep electric structure beneath the epicentre of the 1927 Gulang M8 earthquake and its adjacent areas from magnetotelluric sounding.Chinese J.Geophys.(in Chinese),2008,51(2) :511～520
[23] 马宗晋,赵俊猛.天山与阴山燕山造山带的深部结构和地震.地学前缘,1999,6(3) :95～102 Ma Z J,Zhao J M.Contrast research on Tianshan orogenic belt and Yinshan-Yanshan orogenic belt.Earth Science Forntiers(in Chinese),1999,6(3) :95～102
[24] 陆远忠,李胜乐,邓志辉等.基于GIS的地震分析预报系统.成都:成都地图出版社,2002 Lu Y Z,Li S L,Deng Z H,et al.The analytic system of earthquake prediction basing on GIS(in Chinese).Chengdu:Chengdu Cartographic Publishing House,2002
[25] Egbert G D.Robust multiple-station magnetotelluric data processing.Geophys.J.Int.,1997,130:475～496
[26] Gamble T D,Goubau W M,Clarke J.Magnetotellurics with a remote magnetic reference.Geophysics,1979,44:53～68
[27] Berdichevsky M N,Dmitriev V I,Pozdnjakova E E.On twodimensional interpretation of magnetotelluric Soundings.Geophys.J.Int.,1998,133:585～606
[28] Jones A G.Static shift of magnetotelluric data and its removal in a sedimentary basin environment.Geophysics,1988,53(7) :967～978
[29] 陈乐寿,王光锷.大地电磁测深法.北京:地质出版社,1990 Cheng L S,Wang G E.Magnetotelluric Method(in Chinese).Beijing:Geological Publishing House,1990
[30] Rodi W,Mackie R L.Nonlinear conjugate gradients algorithm for 2-D magnetotelluric inversion.Geophysics,2001,66(1) :174～187
[31] 石应骏,刘国栋,吴光耀等.大地电磁测深教程.北京:地震出版社,1985 Shi Y J,Liu G D,Wu G Y,et al.Magnetotelluric Course(in Chinese).Beijing:Seismological Press,1985
[32] 李立.中国大陆地壳上地幔电性特征.地球物理学报,1996,39(增刊):130～140 Li L.The geoelectrical characteristic of crust and upper mantle in the continental region of China.Chinese J.Geophys.(in Chinese),1996,39(Suppl):130～140
[33] 卢造勋,刘国栋,魏梦华等.中国辽南地区地壳与上地幔介质的横向不均匀性与海城7． 3级地震.地震学报,1990,12(4) :367～378 Lu Z X,Liu G D,Wei M H,et al.Lateral inhomogeneity crust and upper mantle in south Liaoning,China and its relationship with the M_s 7． 3 Haicheng earthquake.Acta Seismological Sinica(in Chinese),1990,12(4) :367～378
[34] 邓前辉,王继军,汤吉等.三河-平谷8级大震区地壳上地幔电性结构特征研究.地震地质,2001,23(3) :178～185 Deng Q H,WANGJ J,Tang J,et al.Electrical structures of the crust and upper mantle in Sanhe-Pinggu M8． 0 earthquake area China.Seismology and Geology(in Chinese),2001,23(3) :178～185
[35] Zhao G Z,Zhan Y,Wang L F,et al.Electromagnetic anomaly before earthquakes measured by electromagnetic experiments.Earthquake Science,2009,22(4) :395～402
[2] 山东地质矿产局.山东区域地质志.北京:地质出版社,1991 Bureau of Geology and Mineral Resources of Shandong Province.Regional Geology of Shsndong Province(in Chinese).Beijing:Geological Publishing House,1991
[3] 山东省地方史志编纂委员会.山东省志·地震志.济南:山东人民出版社,1995 Editorial Board of Shandong Province Annals.Annals of Shandong Province·Earthquake(in Chinese).Jinan:Peoples of Shandong Press,1995
[4] 许杰,高占武,孙建宝等.1969年渤海7． 4级地震区地质构造的初步研究.中国地震,2001,17(2) :121～133 Xu J,Gao Z W,Sun J B,et al.Analysis of Structures in 1969 Bohai Sea M_s 7． 4 Earthquake Area and Discussion about the Causative Structure.Earthquake Research in China(in Chinese),2001,17(2) :121～133
[5] 高祥林.渤海中部郯庐断裂带的近期活动与渤海新近世纪断裂.地质科学,2006,41(2) :355～364 Gao X L.Recent activites of the Tan-Lu fault zone in the central Bohai sea and newly generated faults during neogene in Bohai.Chinese Journal of Geology(in Chinese),2006,41(2) :355～364
[6] 李家灵,晁洪太,崔昭文等.郯庐活断层的分段及其大震危险性分析.地震地质,1994,16(2) :121～126 Li J L,Chao H T,Cui Z Wet al.Segmentation of active fault along the Tanlu fault zone and evaluation of strong earthquake risk.Seismology and Geology(in Chinese),1994,16(2) :121～126
[7] 晁洪太,李家灵,崔昭文等.郯庐断裂带潍坊-嘉山段全新世活断层的活动方式与发展模式.地震研究,1997,20(2) :218～226 Chao H T,Li J L,Cui Z Wet al.Mode of motion of the Holocene fault in Weifang-Jiashan segment of the Tanlu fault zone and earthquake generating model.Journal of Seismological Research(in Chinese),1997,20(2) :218～226
[8] 施炜,张岳桥,董树文.郯庐断裂带中段第四纪活动及其分段特征.地球学报,2003,24(1) :11～18 Shi W,Zhang Y Q,Dong S W.Quaternary activity and segmentation behavior of the middle portionofthe Tan-Lu Fault zone.Acta Geoscientia Sinica(in Chinese),2003,24(1) :11～18
[9] Shankland T J,Waff H S.Partial melting and electrical conductivity anomalies in the upper mantle.Rev.Geophys.Space Phys.,1977,19:394～406
[10] 赵国泽,汤吉,梁竞阁等.用大地电磁网法在长春等地探测上地幔电导率结构.地震地质,2001,23(2) :143～152 Zhao G Z,Tang J,Liang J Get al.Measuement of network-MT in two areas of Nechina for study of upper mantle conductivity.Seismology and Geology(in Chinese),2001,23(2) :143～152
[11] 汤吉,王继军,陈小斌等.阿尔山火山区地壳上地幔电性结构初探.地球物理学报,2005,48(1) :196～202 Tang J,Wang J J,Chen X B,et al.Preliminary investigation for electric conductivity structure of the crust and upper mantle beneath the Aershan volcano area.Chinese J.Geophys.(in Chinese),2005,48(1) :196～202
[12] 肖骑彬,赵国泽,詹艳等.大别山超高压变质带深部电性结构及其动力学意义初步研究.地球物理学报,2007,50(3) :812～822 Xiao Q B,Zhao G Z,Zhan Y,et al.A preliminary study on electrical structure and dynamics of the ultra-high pressure metamorphic belt beneath the Dabie Mountains.Chinese J.Geophys.,(in Chinese),2007,50(3) :812～822
[13] 肖骑彬,赵国泽,王继军等.苏鲁造山带及邻区深部电性结构研究.中国科学(D),2008,38(10) :1258～1267 Xiao Q B,Zhao G Z,Wang J J,et al.Study on deep electrical conductivity structure of SuLu orogenic belt and its neighbouring region.Science in China(Series D),2008,38(10) :1258～1267
[14] 赵国泽,汤吉,詹艳等.青藏高原东北缘地壳电性结构和地块变形关系研究.中国科学(D),2004,34(10) :908～918 Zhao G Z,Tang J,Zhan Y,et al.Relation between electricity structure of the crust and deformation of crustal blocks on the northeastern margin of Qinghai-Tibet plateau.Science in China(Series D),2005,34(10) :908～918
[15] 赵国泽,詹艳,陈小斌等.电磁法在地下水探查中的应用.工程地球物理学报,2004,1(3) :220～225 Zhao G Z,Zhan Y,Chen X B,et al.Detection on the ground whater using EM method.Chinese Journal of Engineer Geophysics(in Chinese),2004,1(3) :220～225
[16] 赵国泽,刘铁胜,江钊等.山西阳高河北容城剖面大地电磁资料的二维反演解释.地球物理学报,1997,40(1) :39～46 Zhao G Z,Liu T S,Jiang Z,et al.Investigation on MT data along Yanggao-Rongcheng profile by two-dimensional inversion.Chinese J.Geophys.(in Chinese),1997,40(1) :39～46
[17] 赵国泽,刘国栋,詹艳等.张北-尚义地震区及其邻区地壳上地幔结构.地震地质,1998,20(2) :155～163 Zhao G Z,Liu G D,Zhan Y,et al.The structure of the crust and upper mantle for the Zhangbei-Shangyi seismic area and its neighbouring region.Seismology and Geology(in Chinese),1998,20(2) :155～163
[18] 赵国泽,陈小斌,肖骑彬等.汶川M_s 8． 0级地震成因三“层次”分析--基于深部电性结构.地球物理学报,2009,52(2) :553～563 Zhao G Z,Chen X B,Xiao Q B,et al.Generation mechanism of Wenchuan strong earthquake of M_s 8． 0 inferred from EM measurements in three levers.Chinese J.Geophys.(in Chinese),2009,52(2) :553～563
[19] 邓前辉,张木生,詹艳等.邢台7． 2级地震震源区的电磁阵列剖面法测量与电性特征研究.地球物理学报,1998,41(2) :218～225 Deng Q H,Zhang M S,Zhan Y,et al.The observation of electromagnetic array profiling and electrical characteristics of the crust in Xingtai Ms7． 2 earthquake area.Chinese J.Geophys.(in Chinese),1998,41(2) :218～225
[20] 徐常芳.中国大陆壳内与上地幔高导层成因及唐山地震机理研究.地学前缘,2003,10(增刊):101～111 The cause of formation of the upper manle and crust high conductive layers in Chinese mainland and the study of Tangshan earthquake.Earth Science Forntiers,2003,10(Suppl):101～111
[21] 詹艳,赵国泽,陈小斌等.宁夏海原大震区西安州-韦州剖面大地电磁探测与研究.地球物理学报,2004,47(2) :274～281 Zhan Y,Zhao G Z,Chen X B,et al.Crustal structure from magnetotelluric profiling in the Haiyuan earthquake area,Ningxia Hui Autonomous Region,China.Chinese J.Geophys.(in Chinese),2004,47(2) :274～281
[22] 詹艳,赵国泽,王继军等.1927年古浪8级大震区及其周边地块的深部电性结构.地球物理学报,2008,51(2) :511～520 Zhan Y,Zhao G Z,Wang J J,et al.Deep electric structure beneath the epicentre of the 1927 Gulang M8 earthquake and its adjacent areas from magnetotelluric sounding.Chinese J.Geophys.(in Chinese),2008,51(2) :511～520
[23] 马宗晋,赵俊猛.天山与阴山燕山造山带的深部结构和地震.地学前缘,1999,6(3) :95～102 Ma Z J,Zhao J M.Contrast research on Tianshan orogenic belt and Yinshan-Yanshan orogenic belt.Earth Science Forntiers(in Chinese),1999,6(3) :95～102
[24] 陆远忠,李胜乐,邓志辉等.基于GIS的地震分析预报系统.成都:成都地图出版社,2002 Lu Y Z,Li S L,Deng Z H,et al.The analytic system of earthquake prediction basing on GIS(in Chinese).Chengdu:Chengdu Cartographic Publishing House,2002
[25] Egbert G D.Robust multiple-station magnetotelluric data processing.Geophys.J.Int.,1997,130:475～496
[26] Gamble T D,Goubau W M,Clarke J.Magnetotellurics with a remote magnetic reference.Geophysics,1979,44:53～68
[27] Berdichevsky M N,Dmitriev V I,Pozdnjakova E E.On twodimensional interpretation of magnetotelluric Soundings.Geophys.J.Int.,1998,133:585～606
[28] Jones A G.Static shift of magnetotelluric data and its removal in a sedimentary basin environment.Geophysics,1988,53(7) :967～978
[29] 陈乐寿,王光锷.大地电磁测深法.北京:地质出版社,1990 Cheng L S,Wang G E.Magnetotelluric Method(in Chinese).Beijing:Geological Publishing House,1990
[30] Rodi W,Mackie R L.Nonlinear conjugate gradients algorithm for 2-D magnetotelluric inversion.Geophysics,2001,66(1) :174～187
[31] 石应骏,刘国栋,吴光耀等.大地电磁测深教程.北京:地震出版社,1985 Shi Y J,Liu G D,Wu G Y,et al.Magnetotelluric Course(in Chinese).Beijing:Seismological Press,1985
[32] 李立.中国大陆地壳上地幔电性特征.地球物理学报,1996,39(增刊):130～140 Li L.The geoelectrical characteristic of crust and upper mantle in the continental region of China.Chinese J.Geophys.(in Chinese),1996,39(Suppl):130～140
[33] 卢造勋,刘国栋,魏梦华等.中国辽南地区地壳与上地幔介质的横向不均匀性与海城7． 3级地震.地震学报,1990,12(4) :367～378 Lu Z X,Liu G D,Wei M H,et al.Lateral inhomogeneity crust and upper mantle in south Liaoning,China and its relationship with the M_s 7． 3 Haicheng earthquake.Acta Seismological Sinica(in Chinese),1990,12(4) :367～378
[34] 邓前辉,王继军,汤吉等.三河-平谷8级大震区地壳上地幔电性结构特征研究.地震地质,2001,23(3) :178～185 Deng Q H,WANGJ J,Tang J,et al.Electrical structures of the crust and upper mantle in Sanhe-Pinggu M8． 0 earthquake area China.Seismology and Geology(in Chinese),2001,23(3) :178～185
[35] Zhao G Z,Zhan Y,Wang L F,et al.Electromagnetic anomaly before earthquakes measured by electromagnetic experiments.Earthquake Science,2009,22(4) :395～402
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