利用远震接收函数研究江西省地震台站下方莫霍面深度及泊松比分布
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摘要
利用三分量远震记录资料,计算获得了江西省13个数字地震台下方的体波接收函数,利用H-kappa叠加方法反演得到这些台站下方的地壳厚度及泊松比。结果表明,研究区域东西向莫霍面起伏平缓,南北向地壳厚度变化稍大,全区域内地壳平均厚度为31 km,最大深度为九江的35 km,最小深度为赣州的28 km。泊松比的分布在研究区内从0.2到0.3之间变化,最大为会昌的0.27,最小为南昌的0.21。赣南各台站泊松比分布明显高于赣北,这可能与该区域地幔组分及地质演化过程有关。
Based on three-component digital waveform data of teleseismic earthquake events,we calculate body wave receiver functions under the 13 stations in Jiangxi province,and obtain the crustal thickness and Poisson’s ratio under these stations in this region by H-kappa stacking method.The results show that the crustal thickness with an average thickness of 31 km changes little from East to West and thickens from North to South.The maximum crustal thickness is 35 km beneath the station JUJ,and the crust thickness beneath the station GAZ is 28 km only.Poisson’s ratio which may be related to material composition of earth interior and geological evolution in Jiangxi Province ranges between 0.2 and 0.3.Poisson’s ratio in the South Jiangxi has distinctly higher values than that in the North Jiangxi.The results also show that the maximum Poisson’s ratio in our study region is 0.27 beneath the station HUC,and the minimum Poisson’s ratio beneath the station NNC is 0.21.
Based on three-component digital waveform data of teleseismic earthquake events,we calculate body wave receiver functions under the 13 stations in Jiangxi province,and obtain the crustal thickness and Poisson’s ratio under these stations in this region by H-kappa stacking method.The results show that the crustal thickness with an average thickness of 31 km changes little from East to West and thickens from North to South.The maximum crustal thickness is 35 km beneath the station JUJ,and the crust thickness beneath the station GAZ is 28 km only.Poisson’s ratio which may be related to material composition of earth interior and geological evolution in Jiangxi Province ranges between 0.2 and 0.3.Poisson’s ratio in the South Jiangxi has distinctly higher values than that in the North Jiangxi.The results also show that the maximum Poisson’s ratio in our study region is 0.27 beneath the station HUC,and the minimum Poisson’s ratio beneath the station NNC is 0.21.
引文
[1]安张辉,周民都,吴庆举,等.接收函数方法研究进展[J].西北地震学报,2004,26(4):362-364.
[2]贺传松,王椿镛,吴庆举.接收函数方法及其新的进展[J].地球物理学进展,2003,18(2):224-228.
[3]王小平,宋秀青,秦浩文.接收函数方法应用的现状及其发展[J].地球物理学进展,2005,20(2):545-549.
[4]王椿镛,楼海,吕智勇,等.青藏高原东部地壳上地幔s波速度结构:下地壳流的深部环境[J].中国科学(D辑),2008,38(1):22-32.
[5]李永华,吴庆举,田小波,等.用接收函数方法研究云南及其邻区地壳上地幔结构[J].地球物理学报,2009,52(1):67-80.
[6]袁丽文,郑斯华.用远震接收函数反演福建地区宽频带台站下方莫霍界面深度[J].华南地震,2009,29(3):85-97
[7]许卫卫,郑天愉.接收函数方法及研究进展[J].地球物理学进展,2002,17(4):605-613.
[8]Zhu L,Kanamori H.Moho depth variation in southern California from teleseismic receiver functions[J].J.Geophys.Res..2000,105(2):2969～2980.
[9]Frassetto A,Gilbert H,Zandt G,et a1.Support of high ele-vation in the southern Basin and Range basedon the composi-tion and architecture of the crust in the Basin and Range and Colorado Plateau[J].EarthPlanet.Sci.Lett.,2006.249:62～73.
[10]蔡亚先,吕永清,周云耀,等.CTS-1甚宽频带地震计[J].大地测量与地球动力学,2004,24(3):109-114.
[11]罗艳,崇加军,倪四道,等.首都圈地区莫霍面起伏及沉积层厚度[J].地球物理学报,2008,51(4):1135-1145.
[12]国家地震局科技监测司.中国大陆深部构造的研究与进展[M].北京:地质出版社,1988.140-153,248-252.
[13]《江西省地震志》编纂委员会.江西省志:江西省地震志[M].北京:方志出版社,2003:66-81.
[14]尹周勋,赖明惠,熊绍柏,等.连县-博罗-港口地带地壳结构及速度分布的爆炸地震探测结果[J].地球物理学报,1999,42(3):383-392.
[15]王椿镛,张先康,陈步云,等.大别造山带的地壳结构研究[J].中国科学(D辑),1997,27(3):221-226.
[16]高星,王卫发,姚振兴.中国及邻近地区地壳结构[J].地球物理学报,2005,48(3):591-601.
[17]闫雅芬,王光杰,张中杰,等.中国华南大陆重力场特征及其大地构造意义[J].地质学报,2004,78(6):828.
[18]汪昌亮,丛卫克,颜丹丹,等.赣北程浪断裂带的形成:程浪超基性岩墙群和星子花岗岩的地球化学证据[J].现代地质,2005,19(3):327-329.
[19]谢桂青,胡瑞忠,贾大成.赣西北基性岩脉的地质地球化学特征及其意义.地球化学[J],2002,31(4):330-332.
[20]谢桂青,毛景文,胡瑞忠,等.赣中早第三纪镁铁质岩石的地质地球化学及其地质意义[J].岩石学报,2005,21(1):77-79.
[21]邱检生,B.I.A.McInnes,蒋少涌,等.江西会昌密坑山岩体的地球化学及其成因类型的新认识[J].地球化学,2005,34(1):20-22.
[22]陈志刚,李献华,李武显,等.赣南全南正长岩的SHRIMP锆石U-Pb年龄及其对华南燕山早期构造背景的制约[J].地球化学,2003,32(3):223-227.
[23]胡家富,朱雄关,夏静瑜,等.利用面波和接收函数联合反演滇西地区壳幔速度结构[J].地球物理学报,2005,48(5):1069-1076.
[24]Ju lia,C J Ammon,R.B.Herrmann,et al.2000.Joint inversion of receiver function and surface wavedispersion observations[J].Geophys.J.Int,143:99-112.
[2]贺传松,王椿镛,吴庆举.接收函数方法及其新的进展[J].地球物理学进展,2003,18(2):224-228.
[3]王小平,宋秀青,秦浩文.接收函数方法应用的现状及其发展[J].地球物理学进展,2005,20(2):545-549.
[4]王椿镛,楼海,吕智勇,等.青藏高原东部地壳上地幔s波速度结构:下地壳流的深部环境[J].中国科学(D辑),2008,38(1):22-32.
[5]李永华,吴庆举,田小波,等.用接收函数方法研究云南及其邻区地壳上地幔结构[J].地球物理学报,2009,52(1):67-80.
[6]袁丽文,郑斯华.用远震接收函数反演福建地区宽频带台站下方莫霍界面深度[J].华南地震,2009,29(3):85-97
[7]许卫卫,郑天愉.接收函数方法及研究进展[J].地球物理学进展,2002,17(4):605-613.
[8]Zhu L,Kanamori H.Moho depth variation in southern California from teleseismic receiver functions[J].J.Geophys.Res..2000,105(2):2969～2980.
[9]Frassetto A,Gilbert H,Zandt G,et a1.Support of high ele-vation in the southern Basin and Range basedon the composi-tion and architecture of the crust in the Basin and Range and Colorado Plateau[J].EarthPlanet.Sci.Lett.,2006.249:62～73.
[10]蔡亚先,吕永清,周云耀,等.CTS-1甚宽频带地震计[J].大地测量与地球动力学,2004,24(3):109-114.
[11]罗艳,崇加军,倪四道,等.首都圈地区莫霍面起伏及沉积层厚度[J].地球物理学报,2008,51(4):1135-1145.
[12]国家地震局科技监测司.中国大陆深部构造的研究与进展[M].北京:地质出版社,1988.140-153,248-252.
[13]《江西省地震志》编纂委员会.江西省志:江西省地震志[M].北京:方志出版社,2003:66-81.
[14]尹周勋,赖明惠,熊绍柏,等.连县-博罗-港口地带地壳结构及速度分布的爆炸地震探测结果[J].地球物理学报,1999,42(3):383-392.
[15]王椿镛,张先康,陈步云,等.大别造山带的地壳结构研究[J].中国科学(D辑),1997,27(3):221-226.
[16]高星,王卫发,姚振兴.中国及邻近地区地壳结构[J].地球物理学报,2005,48(3):591-601.
[17]闫雅芬,王光杰,张中杰,等.中国华南大陆重力场特征及其大地构造意义[J].地质学报,2004,78(6):828.
[18]汪昌亮,丛卫克,颜丹丹,等.赣北程浪断裂带的形成:程浪超基性岩墙群和星子花岗岩的地球化学证据[J].现代地质,2005,19(3):327-329.
[19]谢桂青,胡瑞忠,贾大成.赣西北基性岩脉的地质地球化学特征及其意义.地球化学[J],2002,31(4):330-332.
[20]谢桂青,毛景文,胡瑞忠,等.赣中早第三纪镁铁质岩石的地质地球化学及其地质意义[J].岩石学报,2005,21(1):77-79.
[21]邱检生,B.I.A.McInnes,蒋少涌,等.江西会昌密坑山岩体的地球化学及其成因类型的新认识[J].地球化学,2005,34(1):20-22.
[22]陈志刚,李献华,李武显,等.赣南全南正长岩的SHRIMP锆石U-Pb年龄及其对华南燕山早期构造背景的制约[J].地球化学,2003,32(3):223-227.
[23]胡家富,朱雄关,夏静瑜,等.利用面波和接收函数联合反演滇西地区壳幔速度结构[J].地球物理学报,2005,48(5):1069-1076.
[24]Ju lia,C J Ammon,R.B.Herrmann,et al.2000.Joint inversion of receiver function and surface wavedispersion observations[J].Geophys.J.Int,143:99-112.
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