Seismic velocity discontinuities beneath the Japan Islands with receuver function tomography
利用接收函数断层扫描研究日本列岛下方的地震速度不连续性
基本信息
- 批准号:17340130
- 负责人:
- 金额:$ 10.53万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B)
- 财政年份:2005
- 资助国家:日本
- 起止时间:2005 至 2007
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
We investigated the method of receiver function (RF) tomography by which we simultaneously determine the smoothly varying 3-D seismic velocity structure and the velocity discontinuity surfaces. Through the investigation, we recognized the necessity of developing the raid and efficient method of synthesizing waveforms in a 3-D velocity structure including velocity discontinuities, and then developed a raid waveform synthetic method based on improved Gaussian Beam method (GBM). We applied this method to the waveforms observed in the Kii peninsula, southwest Japan, where the Philippine Sea plate is subducting with a complex 3-D configuration. We synthesized radial, transverse and vertical RFs, and compared them with the observed ones to investigate the structure of the top and the oceanic Moho of the descending Philippine Sea slab. As results, we confirmed the phases appeared in the observed radial and transverse RFs are the P to S wave converted (Ps) phases at the inclined seismic velocity discontinuities, and the phases in the vertical RFs are the P waves reflected at the surface and the inclined velocity discontinuities (PpdP).Further, we investigated the top, the oceanic Moth and the bottom of the subducting Pacific slab by employing the RFs produced from Hi-net tiltmeters. Especially in the central Japan region where the station density is high, the analyses using bath the radial and transverse RFs revealed that dehydrated water is transported. into the mantle transition zone.The ; low velocity zone revealed by RF analyses indicates the existence of the layer of dehydrated water. Finally, we executed 2-D simulation of earthquake cycle on a fluid-infiltrated plate interface based on a rate and state dependent friction, and investigated the relation between the fecal depth and the pore pressure distribution at depths.
研究了同时确定三维地震波速度结构和速度不连续面的接收函数层析成像方法。通过研究,我们认识到了在包含速度间断的三维速度结构中发展快速波形合成的必要性和有效方法,并提出了一种基于改进高斯波束法(GBM)的快速波形合成方法。我们应用这种方法在纪伊半岛,日本西南部,菲律宾海板块俯冲与复杂的3-D配置观察到的波形。我们合成了径向、横向和垂直方向的RF,并与观测结果进行了比较,以研究菲律宾海板块下降的顶部和海洋莫霍面的结构。结果表明,径向和横向反射率中出现的相位是倾斜速度不连续面处的P波到S波转换(Ps)相位,垂直反射率中出现的相位是地表反射的P波和倾斜速度不连续面(PpdP)相位。利用Hi-net倾斜仪产生的RF对大洋蛾和俯冲太平洋板块的底部进行了研究。特别是在日本中部地区,其中站密度高,使用浴的径向和横向RF的分析表明,脱水水的运输。RF分析揭示的低速带表明存在脱水水层。最后,我们进行了二维模拟的地震周期上的流体渗透板界面的基础上的速率和状态相关的摩擦,并探讨粪便深度和孔隙压力分布之间的关系。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Upper mantle imaging beneath the Japan Islands by Hi-net tiltmeter recordings
- DOI:10.1186/bf03352605
- 发表时间:2006-09
- 期刊:
- 影响因子:0
- 作者:T. Tonegawa;K. Hirahara;T. Shibutani;K. Shiomi
- 通讯作者:T. Tonegawa;K. Hirahara;T. Shibutani;K. Shiomi
Gausian-beam receiver function synthetics in a 3-D heterogeneous medium with velocity discontinuities at the Japan subduction zone
日本俯冲带速度不连续的 3-D 异质介质中的高斯光束接收函数合成
- DOI:
- 发表时间:2007
- 期刊:
- 影响因子:0
- 作者:Hirahara;K.;T. Tonegawa;T. Shibutani
- 通讯作者:T. Shibutani
3次元不均質場でのレシーバ関数合成
3D非均匀场中的接收函数合成
- DOI:
- 发表时间:2007
- 期刊:
- 影响因子:0
- 作者:UCHIDA;Tsutomu;K. Sakoda;平原和郎・利根川貴志・澁谷拓郎
- 通讯作者:平原和郎・利根川貴志・澁谷拓郎
Two-dimensional model calculations of earthquake cycle on a fluid-infiltrated plate interface as a subduction zone : Focal depth dependence on pore pressure conditions
作为俯冲带的流体渗透板块界面上的地震周期二维模型计算:震源深度对孔隙压力条件的依赖性
- DOI:
- 发表时间:2007
- 期刊:
- 影响因子:0
- 作者:Mitsui;Y.;K.;Hirahara
- 通讯作者:Hirahara
Imaging of seismic velocity heterogeneities with seismic tomography
利用地震层析成像对地震速度不均匀性进行成像
- DOI:
- 发表时间:2007
- 期刊:
- 影响因子:0
- 作者:Hirahara;K
- 通讯作者:K
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HIRAHARA Kazuro其他文献
HIRAHARA Kazuro的其他文献
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{{ truncateString('HIRAHARA Kazuro', 18)}}的其他基金
Receiver function imaging of high-resolution seismic discontinuity structure in the crust and the mantle beneath the Japan Islands
日本列岛地壳和地幔高分辨率地震不连续结构的接收函数成像
- 批准号:
14340131 - 财政年份:2002
- 资助金额:
$ 10.53万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Seismic Velocity Discontinuities beneath The Japan Islands Revealed by Receiver Function Analysis
接收函数分析揭示日本列岛下方的地震速度不连续性
- 批准号:
11440131 - 财政年份:1999
- 资助金额:
$ 10.53万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Numerical modeling for seismic cycle of great interplate earthquakes along the Nankai trough following a friction law
遵循摩擦定律的南海海槽板间大地震地震周期数值模拟
- 批准号:
08454124 - 财政年份:1996
- 资助金额:
$ 10.53万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
GPS Measurement of Philippine Sea Plate Motion in the Nansei-Shotou Region
南西-鸟岛地区菲律宾海板块运动的 GPS 测量
- 批准号:
01460050 - 财政年份:1989
- 资助金额:
$ 10.53万 - 项目类别:
Grant-in-Aid for General Scientific Research (B)
相似海外基金
High Resolution Imaging of Seismic Velocity Discontinuities
地震速度不连续性的高分辨率成像
- 批准号:
0106904 - 财政年份:2001
- 资助金额:
$ 10.53万 - 项目类别:
Continuing Grant
Seismic Velocity Discontinuities beneath The Japan Islands Revealed by Receiver Function Analysis
接收函数分析揭示日本列岛下方的地震速度不连续性
- 批准号:
11440131 - 财政年份:1999
- 资助金额:
$ 10.53万 - 项目类别:
Grant-in-Aid for Scientific Research (B)