用接收函数方法研究上海地震台阵下地壳结构
|
摘要
利用上海地震台阵16个台站记录的远震资料,采用接收函数线性反演方法,对台阵下的地壳速度结构进行研究,获得了研究区域内地壳厚度和地壳速度的分布特征。研究结果表明,研究区域Moho面深度约为33±2 km,Moho面深度基本不变,地幔顶部S波速度约4.4 km/s,地壳内没有发现明显的低速层。
We selected broadband teleseismic waveform data recorded by the Shanghai seismic array to study the crustal thickness and structure in Shanghai region by modeling the teleseismic P wave receiver function.The results show that beneath the studied area, the depth of Moho discontinuity is about 33±2 km, without obvious variation.S wave velocity gets up to 4.4 km/s at the depth of Moho discontinuity.There is no obviously low velocity layer in the crust.
We selected broadband teleseismic waveform data recorded by the Shanghai seismic array to study the crustal thickness and structure in Shanghai region by modeling the teleseismic P wave receiver function.The results show that beneath the studied area, the depth of Moho discontinuity is about 33±2 km, without obvious variation.S wave velocity gets up to 4.4 km/s at the depth of Moho discontinuity.There is no obviously low velocity layer in the crust.
引文
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．
刘启元,Rainer K,李顺成.中国数字地震台网的接收函数及其非线性反演[J].地球物理学报,1997,40(3) :356-368．
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[J].中国科学D辑;地球科学,2008,38(1) :22-32．
王小平,朱元清.上海及其邻近地区上地幔间断面接收函数的研究[J].地震地磁观测与研究,2007,28(5) :150-154．
吴庆举,曾融生.用宽频带远震接收函数研究青藏高原的地壳结构[J].地球物理学报,1998,41(5) :669-679．
吴庆举,田小波,张乃铃,等.计算台站接收函数的最大熵谱反褶积方法[J].地震学报,2003,25(4) :382-389．
吴庆举,田小波,张乃铃,等.用小波变换方法反演接收函数[J].地震学报,2003,25(6) :601-607．
He Z Q,Ye T L,Su W.3-D velocity structure of the middle and upper crust in the Yunnan region,China[J].Pure Appl Geophys,2005,162:2355-2368．
Langston C A.Structure under Mount Rainier,Washington,inferred from teleseismic body waves[J].J Geophys,1979,84:4749-4762．
Zhu L P,Kanamori H.Moho depth variation in southern California from teleseismic receiver functions[J].J Geophys,2000,105:2969-2980．
刘启元,Rainer K,李顺成.中国数字地震台网的接收函数及其非线性反演[J].地球物理学报,1997,40(3) :356-368．
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[J].中国科学D辑;地球科学,2008,38(1) :22-32．
王小平,朱元清.上海及其邻近地区上地幔间断面接收函数的研究[J].地震地磁观测与研究,2007,28(5) :150-154．
吴庆举,曾融生.用宽频带远震接收函数研究青藏高原的地壳结构[J].地球物理学报,1998,41(5) :669-679．
吴庆举,田小波,张乃铃,等.计算台站接收函数的最大熵谱反褶积方法[J].地震学报,2003,25(4) :382-389．
吴庆举,田小波,张乃铃,等.用小波变换方法反演接收函数[J].地震学报,2003,25(6) :601-607．
He Z Q,Ye T L,Su W.3-D velocity structure of the middle and upper crust in the Yunnan region,China[J].Pure Appl Geophys,2005,162:2355-2368．
Langston C A.Structure under Mount Rainier,Washington,inferred from teleseismic body waves[J].J Geophys,1979,84:4749-4762．
Zhu L P,Kanamori H.Moho depth variation in southern California from teleseismic receiver functions[J].J Geophys,2000,105:2969-2980．
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心