河北邯郸—邢台地区波速比和泊松比分布特征研究
|
摘要
根据多台和达法,利用邯郸—邢台地区9个数字地震台的观测数据研究了该区波速比和泊松比分布特征。结果显示:(1)9个小区域波速比值在1.696～1.737之间,相关系数在0.988 3～0.999 1之间,研究区平均波速比值为1.719,平均泊松比值为0.244,所得泊松比值与研究区内地壳介质以花岗岩为主一致。(2)研究区内波速比和泊松比变化比较复杂,反映了区内上地壳介质性质的不同和地质构造的复杂性。
According to multi-station Wadati diagram method,using the data from 9 digital seismic stations in Handan-Xingtai region of Hebei province,the distribution characteristics of wave velocity ratio and Poisson's ratio values in this region are studied.The results show:(1) In 9 sub-regions,velocity ratio values are between 1.696~1.737,the correlation coefficients are among 0.988 3~0.999 1,the average velocity ratio value of the study area is 1.719,the average Poisson's ratio is 0.244.The Poisson's ratio result consistent with the crust medium which mainly consist of granite in the study area.(2) The wave velocity ratio values and d Poisson's ratio values vary in complex image in the study area.It objectively reflect the different medium properties of the upper crust and the complicated nature of geological structure under the study area.
According to multi-station Wadati diagram method,using the data from 9 digital seismic stations in Handan-Xingtai region of Hebei province,the distribution characteristics of wave velocity ratio and Poisson's ratio values in this region are studied.The results show:(1) In 9 sub-regions,velocity ratio values are between 1.696~1.737,the correlation coefficients are among 0.988 3~0.999 1,the average velocity ratio value of the study area is 1.719,the average Poisson's ratio is 0.244.The Poisson's ratio result consistent with the crust medium which mainly consist of granite in the study area.(2) The wave velocity ratio values and d Poisson's ratio values vary in complex image in the study area.It objectively reflect the different medium properties of the upper crust and the complicated nature of geological structure under the study area.
引文
[1]刁桂苓,周仕勇,刘杰,等.岫岩地震序列的平均波速比前兆异常[J].华北地震科学,2005,23(4):1-5.
[2]刘继录,张从珍,曹肃朝,等.张北6.2级地震前后波速比在源区与场区的变化特征[J].华北地震科学,2001,19(2):14-20.
[3]梅世蓉,冯益德,张国民,等.中国地震预报概论[M].北京:地震出版社,1993:78-80.
[4]陆远忠,陈章立.地震预报的地震学方法[M].北京:地震出版社,1985:175-196.
[5]啜永清,宋美琴.山西大同盆地震源机制解矛盾符号比及波速比变化的研究[J].山西地震,2005,109(2):1-3.
[6]赵晋明,胡毅力,杨润海,等.岩石临破前波速奇异变化的再研究[J].地震研究,2001,24(2):136-139.
[7]黎明晓,张晓东.应用多台法测定华北地区地壳的平均波速比[J].地震,2004,24(1):163-169.
[8]冯建刚,代炜,董志平,等.青藏高原东北缘平均波速比的测定及研究[J].西北地震学报,2009,31(1):61-65.
[9]张小涛、吕坚、马广庆,等.双差地震定位法在邯邢地区地震精确定位中的初步应用[J].地震研究,2008.31(1):37-41.
[10]Christensen N I,Mooney W D.Seismic velocity structureand composition of the continental crust:aglobal view[J].JGeophys.Res.,1995,100:9761-9788.
[11]Tarkov A P,Vavakin V V.Poisson's ratio behaviour in crys-talline rocks:application to the study of the Earth's interior[J].Phys.Earth Planet.Inter.,1982,29:24-29.
[12]Watanabe T.Effects of water an d melt on seismic velocitiesand their application to characterization of seismic reflectors[J].Geophys.Res.Lett.,1993,20:2933-2936.
[2]刘继录,张从珍,曹肃朝,等.张北6.2级地震前后波速比在源区与场区的变化特征[J].华北地震科学,2001,19(2):14-20.
[3]梅世蓉,冯益德,张国民,等.中国地震预报概论[M].北京:地震出版社,1993:78-80.
[4]陆远忠,陈章立.地震预报的地震学方法[M].北京:地震出版社,1985:175-196.
[5]啜永清,宋美琴.山西大同盆地震源机制解矛盾符号比及波速比变化的研究[J].山西地震,2005,109(2):1-3.
[6]赵晋明,胡毅力,杨润海,等.岩石临破前波速奇异变化的再研究[J].地震研究,2001,24(2):136-139.
[7]黎明晓,张晓东.应用多台法测定华北地区地壳的平均波速比[J].地震,2004,24(1):163-169.
[8]冯建刚,代炜,董志平,等.青藏高原东北缘平均波速比的测定及研究[J].西北地震学报,2009,31(1):61-65.
[9]张小涛、吕坚、马广庆,等.双差地震定位法在邯邢地区地震精确定位中的初步应用[J].地震研究,2008.31(1):37-41.
[10]Christensen N I,Mooney W D.Seismic velocity structureand composition of the continental crust:aglobal view[J].JGeophys.Res.,1995,100:9761-9788.
[11]Tarkov A P,Vavakin V V.Poisson's ratio behaviour in crys-talline rocks:application to the study of the Earth's interior[J].Phys.Earth Planet.Inter.,1982,29:24-29.
[12]Watanabe T.Effects of water an d melt on seismic velocitiesand their application to characterization of seismic reflectors[J].Geophys.Res.Lett.,1993,20:2933-2936.
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