Constraining Two Prominent Low-Velocity Anomalies in the Lower Mantle beneath Africa and Pacific
限制非洲和太平洋下下地幔的两个突出的低速异常
基本信息
- 批准号:0309859
- 负责人:
- 金额:$ 20.83万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2003
- 资助国家:美国
- 起止时间:2003-09-01 至 2007-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
WenThe investigator proposes to map out detailed structural and velocity features of the two prominent low-velocity anomalies in the lower mantle beneath Africa and the Pacific. He will use extensive waveform modeling by the 2D hybrid methods to constrain the seismic velocities, geometry, and length-scale of the seismic anomalies from various directions using various seismic phases. The PI also proposes to develop a three-dimensional hybrid seismic code along the course of this research program. The three-dimensional hybrid code will be used to forward verify the validity of the seismic results obtained from the 2D-hybrid method waveform modeling. The intellectual merits of the proposal include both observational and theoretical aspects of seismology. The observational aspect of the proposal includes collection, identification, interpretation and modeling of high-quality anomalous seismic data, with a scientific goal of mapping detailed features of the two prominent low-velocity anomalies in the lower mantle. The theoretical aspect of the proposal includes systematic studies of seismic wave propagation in a heterogeneous mantle, detailed modeling of the anomalous seismic data, and the development of a 3D hybrid method. The proposed research has broad impacts on our further understanding of the formation and evolution of the Earth, thermal-chemical convection in the mantle, the nature of the core-mantle boundary, and the origin of some geochemical reservoirs, such as "the DUPAL anomaly". The new 3D code will have broad applications in the seismology community.
研究者提出绘制非洲和太平洋下地幔两个显著低速异常的详细结构和速度特征。 他将通过二维混合方法使用广泛的波形建模来约束地震速度、几何形状和使用各种地震相位的不同方向的地震异常的长度尺度。 PI还建议沿着本研究计划的过程开发三维混合地震代码。将使用三维混合程序来正演验证从二维混合方法波形模拟获得的地震结果的有效性。该建议的智力价值包括地震学的观测和理论方面。该提案的观测方面包括收集、识别、解释高质量异常地震数据并建立模型,其科学目标是绘制下地幔两个显著低速异常的详细特征。该提案的理论方面包括系统研究地震波在非均匀地幔中的传播,对异常地震数据进行详细建模,以及开发3D混合方法。 该研究对进一步认识地球的形成和演化、地幔热化学对流、核幔边界的性质以及“DUPAL异常”等地球化学油气藏的成因具有重要意义。 新的3D代码将在地震学界有广泛的应用。
项目成果
期刊论文数量(0)
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Lianxing Wen其他文献
Months‐Long Crustal Deformation Driven by Aseismic Slips and Pore Pressure Transients Triggered by Local and Regional Earthquakes
数月——由局部和区域地震引发的抗震滑移和孔隙压力瞬变驱动的长期地壳变形
- DOI:
10.1029/2021gl095148 - 发表时间:
2021-08 - 期刊:
- 影响因子:5.2
- 作者:
Zhou Lu;Lianxing Wen - 通讯作者:
Lianxing Wen
Composition of Mars constrained using geophysical observations and mineral physics modeling
使用地球物理观测和矿物物理建模约束火星的成分
- DOI:
10.1016/j.pepi.2013.08.005 - 发表时间:
2013-11 - 期刊:
- 影响因子:2.3
- 作者:
Yi Wang;Lianxing Wen;Donald Weidner - 通讯作者:
Donald Weidner
Mantle thermo-chemical plumes, the DUPAL anomaly and a compositional anomaly at the Earth’s core-mantle boundary
- DOI:
10.1016/j.gca.2006.06.1514 - 发表时间:
2006-08-01 - 期刊:
- 影响因子:
- 作者:
Lianxing Wen - 通讯作者:
Lianxing Wen
Relative directivity inversion of small earthquake rupture
小地震破裂相对方向性反演
- DOI:
10.1093/gji/ggz179 - 发表时间:
2019-07 - 期刊:
- 影响因子:2.8
- 作者:
Yanyan Xu;Lianxing Wen - 通讯作者:
Lianxing Wen
Collapse and Earthquake Swarm After North Korea's 3 September 2017 Nuclear Test
朝鲜 2017 年 9 月 3 日核试验后的崩塌和地震群
- DOI:
10.1029/2018gl077649 - 发表时间:
2017-12 - 期刊:
- 影响因子:5.2
- 作者:
Dongdong Tian;Jiayuan Yao;Lianxing Wen - 通讯作者:
Lianxing Wen
Lianxing Wen的其他文献
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{{ truncateString('Lianxing Wen', 18)}}的其他基金
Determining temporal change of seismic properties inside the Earth using repeated earthquakes
使用重复地震确定地球内部地震特性的时间变化
- 批准号:
1214215 - 财政年份:2012
- 资助金额:
$ 20.83万 - 项目类别:
Standard Grant
High-resolution mapping of several prominent seismic anomalies in the lower mantle
下地幔几个突出地震异常的高分辨率绘图
- 批准号:
0911319 - 财政年份:2009
- 资助金额:
$ 20.83万 - 项目类别:
Standard Grant
High-resolution Mapping of Seismic Structures in the Lower Mantle
下地幔地震结构的高分辨率测绘
- 批准号:
0609717 - 财政年份:2006
- 资助金额:
$ 20.83万 - 项目类别:
Continuing Grant
Testing Mineralogical Models of the Mantle Transition Zone Using Seismic Data
使用地震数据测试地幔过渡带的矿物学模型
- 批准号:
0439978 - 财政年份:2005
- 资助金额:
$ 20.83万 - 项目类别:
Standard Grant
Seismic Velocity and Attenuation Structures of the Earth's Inner and Outer Core
地球内外核的地震速度和衰减结构
- 批准号:
0207746 - 财政年份:2002
- 资助金额:
$ 20.83万 - 项目类别:
Standard Grant
Collaborative Research: The African Mantle: A Case Study of Seismic Structure, Composition and Dynamics
合作研究:非洲地幔:地震结构、成分和动力学案例研究
- 批准号:
0001232 - 财政年份:2000
- 资助金额:
$ 20.83万 - 项目类别:
Standard Grant
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