海洋广角地震数据校正方法探讨
|
摘要
海洋广角地震数据的采集具有高投入、高风险及高难度等特点,这使得从海洋上采集到的地震数据显得异常宝贵,但往往由于各种客观条件(如气候条件、定时定位条件、仪器条件及人为因素等)的限制,导致采集到的地震数据存在一些缺陷。以南海地区开展的海陆地震联测及海底地震仪(OBS)探测的试验数据为例,对导航数据时间误差、部分陆地固定台站的时间误差、海底地震仪定位偏差等问题进行了分析,并提出了具体的数据校正方法,同时对这些校正方法的原理也进行了相应的分析和探讨。从校正后的结果看,原本存在明显问题的数据得到了有效解决,为更深入地解决海洋人工地震数据存在的各种问题提供了技术路线。
The wide angle seismic data from the sea are very valuable because of the difficulties,costliness and risks in obtaining them.But these data could include some problems which result from weather,bad instrument,jamming,and so on.This paper analyzed and corrected the locations and time of OBSs,seismic stations and navigation data,based on our recently obtained onshore-offshore seismic data and OBS data in the northern South China Sea.We put forward different corrected methods according to different problems,and illuminated their principles.Results after corrections show that the problems existing in original data were well solved,and data after corrections could be used to study the crustal structures.This study can enlighten us to better solve diverse problems potentially existing in the wide angle seismic data from the sea.
The wide angle seismic data from the sea are very valuable because of the difficulties,costliness and risks in obtaining them.But these data could include some problems which result from weather,bad instrument,jamming,and so on.This paper analyzed and corrected the locations and time of OBSs,seismic stations and navigation data,based on our recently obtained onshore-offshore seismic data and OBS data in the northern South China Sea.We put forward different corrected methods according to different problems,and illuminated their principles.Results after corrections show that the problems existing in original data were well solved,and data after corrections could be used to study the crustal structures.This study can enlighten us to better solve diverse problems potentially existing in the wide angle seismic data from the sea.
引文
[1]Nissen S S,Hayes D E,Buhl P,et al.Deep-penetrating seismic sounding across the northern margin of the South China Sea[J].Journal of Geophysical Research,1995,100(B11):22407-22433.
[2]Qiu X,Ye S,Wu S,et al.Crustal structure across the Xisha Trough,northwestern South China Sea[J].Tectonophysics,2001,341:179-193.
[3]Yan P,Zhou D,Liu Z.A crustal structure profile across the northern continental margin of the South China Sea[J].Tectonophysics,2001,338:1-21.
[4]Gailler A,Klingelhoefer F,Olivet J,et al.Crustal structure of a young margin pair:New results across the Liguro-Provencal Basin from wide-angle seismic tomography[J].Earth and Planetary Science Letters,2009,286:333-345.
[5]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.
[6]赵明辉,丘学林,叶春明,等.南海东北部海陆深地震联测与滨海断裂带两侧地壳结构分析[J].地球物理学报,2004,47(5):845-852.
[7]Xia S,Zhao M,Qiu X,et al.Crustal structure in an onshore-offshore transitional zone near Hong Kong,northern South China Sea[J].Journal of Asian Earth Sciences,2010,37:460-472.
[8]薛彬,阮爱国,李湘云,等.SEDIS IV型短周期自浮式海底地震仪数据校正方法[J].海洋学研究,2008,26(2):98-102.
[9]王彦林,阎贫,郑红波,等.OBS记录的时间和定位误差校正[J].热带海洋学报,2007,26(5):40-46.
[10]夏常亮.OBS地震数据关键处理环节研究[D].北京:中国地质大学(北京),2009.
[11]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.
[12]Engdahl E R,Lee W.Relocation of local earthquakes by seismic ray tracing[J].Journal of Geophysical Research,1976,81:4400-4406.
[2]Qiu X,Ye S,Wu S,et al.Crustal structure across the Xisha Trough,northwestern South China Sea[J].Tectonophysics,2001,341:179-193.
[3]Yan P,Zhou D,Liu Z.A crustal structure profile across the northern continental margin of the South China Sea[J].Tectonophysics,2001,338:1-21.
[4]Gailler A,Klingelhoefer F,Olivet J,et al.Crustal structure of a young margin pair:New results across the Liguro-Provencal Basin from wide-angle seismic tomography[J].Earth and Planetary Science Letters,2009,286:333-345.
[5]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.
[6]赵明辉,丘学林,叶春明,等.南海东北部海陆深地震联测与滨海断裂带两侧地壳结构分析[J].地球物理学报,2004,47(5):845-852.
[7]Xia S,Zhao M,Qiu X,et al.Crustal structure in an onshore-offshore transitional zone near Hong Kong,northern South China Sea[J].Journal of Asian Earth Sciences,2010,37:460-472.
[8]薛彬,阮爱国,李湘云,等.SEDIS IV型短周期自浮式海底地震仪数据校正方法[J].海洋学研究,2008,26(2):98-102.
[9]王彦林,阎贫,郑红波,等.OBS记录的时间和定位误差校正[J].热带海洋学报,2007,26(5):40-46.
[10]夏常亮.OBS地震数据关键处理环节研究[D].北京:中国地质大学(北京),2009.
[11]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.
[12]Engdahl E R,Lee W.Relocation of local earthquakes by seismic ray tracing[J].Journal of Geophysical Research,1976,81:4400-4406.
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