珠江口外潜在强震区海陆地震联测的初步结果
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摘要
海陆地震联测是研究海陆过渡带深部地壳结构的有效的地球物理方法。为了研究珠江口外潜在强震区的深部发震构造,对比分析了2004年和2010年珠江口外海陆地震联测的数据特征,重点对2010年海陆地震联测实验的OBS2010-1测线进行分析。通过对该测线采集数据的初步分析可知,此次实验数据质量较高且完善性好,多道地震探测获得了清晰的浅部结构,固定地震台、流动地震台和海底地震仪记录的震相信息丰富,固定台接收气枪信号的最远接收距离约为360km,为研究该潜在强震区的深部发震构造打下了良好的基础。
An onshore-offshore seismic experiment is the most effective method to study the deep crustal structure of land-ocean transitional area.In order to study the deep seismogenic structure of potential strong earthquake zone off the Pearl River Estuary,this paper compares the data of onshore-offshore seismic experiments off the Pearl River Estuary in 2004 and 2010,with emphasis placed on analyzing the profile OBS2010-1 located at the land-ocean transitional area off the Dangan Islands.The data-processing of the profile gives high-quality data.We obtained clear shallow-crustal structure from multi-channel seismic data.Various seismic phases were recorded by permanent seismic stations,portable seismic stations, and Ocean Bottom Seismometers.The permanent seismic stations received air-gun signals over a distance of 360 km.All these provide a strong base for the study of deep seismogenic structure of the potential strong earthquake zone for future research.
An onshore-offshore seismic experiment is the most effective method to study the deep crustal structure of land-ocean transitional area.In order to study the deep seismogenic structure of potential strong earthquake zone off the Pearl River Estuary,this paper compares the data of onshore-offshore seismic experiments off the Pearl River Estuary in 2004 and 2010,with emphasis placed on analyzing the profile OBS2010-1 located at the land-ocean transitional area off the Dangan Islands.The data-processing of the profile gives high-quality data.We obtained clear shallow-crustal structure from multi-channel seismic data.Various seismic phases were recorded by permanent seismic stations,portable seismic stations, and Ocean Bottom Seismometers.The permanent seismic stations received air-gun signals over a distance of 360 km.All these provide a strong base for the study of deep seismogenic structure of the potential strong earthquake zone for future research.
引文
[1]夏少红,赵明辉,丘学林.南海北部海陆过渡带地壳结构的研究现状及展望[J].华南地震,2008,28(4):9-17.
[2]陈恩民,黄咏茵.华南十九次强震暨南海北部陆缘地震带概述[J].华南地震,1984,4(1):11-32.
[3]刘以宣,钟建强,詹文欢.南海北部陆缘地震带基本特征及区域稳定性初步分析[J].华南地震,1994,14(4):41-46.
[4]卢帮华,黄日恒.东南沿海地区的断裂与地震[J].华南地震,2006,26(3):109-118.
[5]钟建强.珠江口盆地及其邻域的活动断裂与地震活动[J].热带海洋,1989,8(3):11-19.
[6]刘以宣.华南沿海的活动断裂[J].海洋地质与第四纪地质,1985,5(3):11-21.
[7]黄日恒.珠江三角洲地区地震危险性刍议[J].华南地震,1998,18(1):64-69.
[8]陆成斌,詹文欢,刘以宣.珠江口断裂的活动性与区域稳定性分析[J].热带海洋,1991,10(1):5-12.
[9]丁原章,李焯芬,潘伟强.香港地区地震危险性分析[J].华南地震,1998,18(1):92-98.
[10]丘学林,施小斌,阎贫,等.南海北部地壳结构的深地震探测和研究新进展[J].自然科学进展,2003,13(3):231-236.
[11]丘学林,陈颙,朱日祥,等.大容量气枪震源在海陆联测中的应用:南海北部试验结果分析[J].科学通报,2007,52(4):463-469.
[12]NAZARETH J J,CLAYTON R W.Crustal structure of theBorderland-Continent Transition Zone of southern Californiaadjacent to Los Angeles[J].J Geophys Res,2003,108(B8):2404.doi:10.1029/2001JB000223.
[13]MCINTOSH K,NAKAMURA Y,WANG T K,et al.Crustal-scale seismic profile across Taiwan and the westernPhilippine Sea[J].Tectonophysics,2005,401:23-54.
[14]HARM J A,AVENDONK V,HOLBROOK W S,et al.Continental crust under compression:A seismic refractionstudy of South Island Geophysical Transect I,South Island,New Zealand[J].J Geophys Res,2004,109:B06032.doi:10.1029/2003JB002790.
[15]XIA S H,ZHAO M H,QIU X L,et al.Crustal structure inan onshore–offshore transitional zone near HongKong,northern South China Sea[J].Journal of Asian EarthSciences,2010,37:460–472.
[16]徐起浩,华卫,万永芳,等.广东省及邻区新生代以来构造运动与地震活动分区的研究[J].水文地质工程地质,2004,4:33-40.
[17]徐辉龙,丘学林,赵明辉,等.南海东北部南澳大地震(M=7.5)震中区的地壳结构特征与震源构造[J].科学通报,2006,51(增刊):83-91.
[18]钟建强.滨海断裂带之所在及其活动性初探[J].华南地震,1987,7(4):1-7.
[19]刘以宣.南澳断裂带与滨海断裂带的基本特征及其活动性探讨[J].华南地震,1986,6(3):1-8.
[20]任镇寰,罗振暖.华南地震区地震带划分的新研究[J].华南地震,1998,18(2):10-15.
[21]张虎男.南海及其周缘的地震活动与区域稳定性评价[J].海洋学报,1995,17(6):81-89.
[22]林纪曾,梁国昭,赵毅,等.东南沿海地区的震源机制与构造应力场[J].地震学报,1980,2(3):245-257.
[23]邹和平.南海北部陆缘地震带的深部结构和孕震机制[J].华南地震,1998,18(3):16-20.
[24]夏少红,丘学林,赵明辉,等.香港与珠三角地区海陆联合地震探测的数据处理[J].热带海洋学报,2007,26(1):35-38.
[25]夏少红,丘学林,赵明辉,等.香港地区海陆地震联测及深部地壳结构研究[J].地球物理学进展,2008,23(5):1389-1397.
[26]夏少红,丘学林,赵明辉,等.南海北部海陆过渡带地壳平均速度及莫霍面深度分析[J].热带海洋学报,2010,29(4):63-70.
[27]CHRISTENSEN N I,MOONEY W D.Seismic velocitystructure and composition of the continental crust:A globalview[J].J Geophys Res,1995,101(B6):9761-9788.
[28]姜本鸿,袁登维,吴玉华.壳内低速层与地震活动的关系[J].地质科技情报,1992,11(4):9-15.
[29]徐辉龙,叶春明,丘学林,等.南海北部滨海断裂带的深部地球物理探测及其发震构造研究[J].华南地震,2010,30(S1):10-18.
[30]孙金龙,夏少红,徐辉龙,等.2010年南海北部海陆联测项目简介及初步成果[J].华南地震,2010,30(S1):45-52.
[31]赵明辉,丘学林,夏戡原,等.南海东北部海陆联测地震数据处理及初步结果[J].热带海洋学报,2004,23(1):58-63.
[32]COHEN J K,STOCKWELL J W.The SU user’s manual[M].Golden:Colorado School of Mines,1995:1-40.
[2]陈恩民,黄咏茵.华南十九次强震暨南海北部陆缘地震带概述[J].华南地震,1984,4(1):11-32.
[3]刘以宣,钟建强,詹文欢.南海北部陆缘地震带基本特征及区域稳定性初步分析[J].华南地震,1994,14(4):41-46.
[4]卢帮华,黄日恒.东南沿海地区的断裂与地震[J].华南地震,2006,26(3):109-118.
[5]钟建强.珠江口盆地及其邻域的活动断裂与地震活动[J].热带海洋,1989,8(3):11-19.
[6]刘以宣.华南沿海的活动断裂[J].海洋地质与第四纪地质,1985,5(3):11-21.
[7]黄日恒.珠江三角洲地区地震危险性刍议[J].华南地震,1998,18(1):64-69.
[8]陆成斌,詹文欢,刘以宣.珠江口断裂的活动性与区域稳定性分析[J].热带海洋,1991,10(1):5-12.
[9]丁原章,李焯芬,潘伟强.香港地区地震危险性分析[J].华南地震,1998,18(1):92-98.
[10]丘学林,施小斌,阎贫,等.南海北部地壳结构的深地震探测和研究新进展[J].自然科学进展,2003,13(3):231-236.
[11]丘学林,陈颙,朱日祥,等.大容量气枪震源在海陆联测中的应用:南海北部试验结果分析[J].科学通报,2007,52(4):463-469.
[12]NAZARETH J J,CLAYTON R W.Crustal structure of theBorderland-Continent Transition Zone of southern Californiaadjacent to Los Angeles[J].J Geophys Res,2003,108(B8):2404.doi:10.1029/2001JB000223.
[13]MCINTOSH K,NAKAMURA Y,WANG T K,et al.Crustal-scale seismic profile across Taiwan and the westernPhilippine Sea[J].Tectonophysics,2005,401:23-54.
[14]HARM J A,AVENDONK V,HOLBROOK W S,et al.Continental crust under compression:A seismic refractionstudy of South Island Geophysical Transect I,South Island,New Zealand[J].J Geophys Res,2004,109:B06032.doi:10.1029/2003JB002790.
[15]XIA S H,ZHAO M H,QIU X L,et al.Crustal structure inan onshore–offshore transitional zone near HongKong,northern South China Sea[J].Journal of Asian EarthSciences,2010,37:460–472.
[16]徐起浩,华卫,万永芳,等.广东省及邻区新生代以来构造运动与地震活动分区的研究[J].水文地质工程地质,2004,4:33-40.
[17]徐辉龙,丘学林,赵明辉,等.南海东北部南澳大地震(M=7.5)震中区的地壳结构特征与震源构造[J].科学通报,2006,51(增刊):83-91.
[18]钟建强.滨海断裂带之所在及其活动性初探[J].华南地震,1987,7(4):1-7.
[19]刘以宣.南澳断裂带与滨海断裂带的基本特征及其活动性探讨[J].华南地震,1986,6(3):1-8.
[20]任镇寰,罗振暖.华南地震区地震带划分的新研究[J].华南地震,1998,18(2):10-15.
[21]张虎男.南海及其周缘的地震活动与区域稳定性评价[J].海洋学报,1995,17(6):81-89.
[22]林纪曾,梁国昭,赵毅,等.东南沿海地区的震源机制与构造应力场[J].地震学报,1980,2(3):245-257.
[23]邹和平.南海北部陆缘地震带的深部结构和孕震机制[J].华南地震,1998,18(3):16-20.
[24]夏少红,丘学林,赵明辉,等.香港与珠三角地区海陆联合地震探测的数据处理[J].热带海洋学报,2007,26(1):35-38.
[25]夏少红,丘学林,赵明辉,等.香港地区海陆地震联测及深部地壳结构研究[J].地球物理学进展,2008,23(5):1389-1397.
[26]夏少红,丘学林,赵明辉,等.南海北部海陆过渡带地壳平均速度及莫霍面深度分析[J].热带海洋学报,2010,29(4):63-70.
[27]CHRISTENSEN N I,MOONEY W D.Seismic velocitystructure and composition of the continental crust:A globalview[J].J Geophys Res,1995,101(B6):9761-9788.
[28]姜本鸿,袁登维,吴玉华.壳内低速层与地震活动的关系[J].地质科技情报,1992,11(4):9-15.
[29]徐辉龙,叶春明,丘学林,等.南海北部滨海断裂带的深部地球物理探测及其发震构造研究[J].华南地震,2010,30(S1):10-18.
[30]孙金龙,夏少红,徐辉龙,等.2010年南海北部海陆联测项目简介及初步成果[J].华南地震,2010,30(S1):45-52.
[31]赵明辉,丘学林,夏戡原,等.南海东北部海陆联测地震数据处理及初步结果[J].热带海洋学报,2004,23(1):58-63.
[32]COHEN J K,STOCKWELL J W.The SU user’s manual[M].Golden:Colorado School of Mines,1995:1-40.
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