Mantle Structure from Joint Inversions of Seismic and Geodynamic Data

地震和地球动力学数据联合反演的地幔结构

基本信息

  • 批准号:
    0309189
  • 负责人:
  • 金额:
    $ 24.5万
  • 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:
    2003-07-01 至 2007-06-30
  • 项目状态:
    已结题

项目摘要

GrandEAR-0309189The goal of the project is to develop a better model of the three-dimensional variations in seismic shear velocity in Earth's mantle as well as to explore the implications of the seismic model for flow in the mantle. The seismic model will be improved by use of a semi-automatic approach to measuring delay times of all S and multi-bounce S waves as well as ScS and all multi-bounce ScS waves. SKS and SKKS waves will also be used. A second aspect of the work will be to use a nonlinear waveform inversion on seismic data that propagate through the upper mantle to extract travel time delays and paths through the mantle for data sensitive to the upper mantle. The investigators will also conduct joint inversions of the seismic data and geodynamic data (gravity field and topography) to test different hypotheses for the flow regime within the mantle. The connection between seismic velocity and observable geodynamic data, such as the Earth's gravity field, depends on the viscosity of the mantle, the density to velocity scaling, as well as the nature of any flow barriers in the mantle. We will run joint inversions for a range of models to see what types of models are most consistent with the observed seismic data as opposed to non-unique seismic models. This work will have a broad impact on all areas of earth science concerned with the physical and chemical nature and evolution of Earth including mineral physics, geodynamics, and geochemistry. The project will also support the graduate education of two students.
该项目的目标是开发一个更好的地幔地震剪切速度三维变化模型,并探索地震模型对地幔流动的影响。将通过使用半自动方法测量所有S波和多反射S波以及ScS波和所有多反射ScS波的延迟时间来改进地震模型。也将使用SKS和SKKS波。工作的第二个方面将是对通过上地幔传播的地震数据使用非线性波形反演,以提取对上地幔敏感的数据的旅行时间延迟和通过地幔的路径。调查人员还将对地震数据和地球动力学数据(重力场和地形)进行联合反演,以检验地幔内流动状况的不同假设。地震速度和可观测到的地球动力学数据(如地球重力场)之间的联系取决于地幔的粘性、密度与速度的比例以及地幔中任何流动障碍的性质。我们将对一系列模型进行联合反演,以查看哪些类型的模型与观测到的地震数据最一致,而不是非唯一的地震模型。 这项工作将对地球科学的所有领域产生广泛的影响,这些领域涉及地球的物理和化学性质以及地球的演化,包括矿物物理学、地球动力学和地球化学。该项目还将支持两名学生的研究生教育。

项目成果

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Stephen Grand其他文献

On Modeling Emergence
  • DOI:
    10.1007/s13752-013-0111-5
  • 发表时间:
    2013-04-12
  • 期刊:
  • 影响因子:
    1.900
  • 作者:
    Oren Harman;Stephen Grand
  • 通讯作者:
    Stephen Grand
Creatures: Entertainment Software Agents with Artificial Life

Stephen Grand的其他文献

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{{ truncateString('Stephen Grand', 18)}}的其他基金

Collaborative Research: Full waveform inversion for P and S seismic structure beneath Tibet
合作研究:青藏高原以下P、S地震构造全波形反演
  • 批准号:
    1838444
  • 财政年份:
    2019
  • 资助金额:
    $ 24.5万
  • 项目类别:
    Standard Grant
CSEDI Collaborative Research: Joint seismic-geodynamic constraints on deep Earth structure - Implications for mantle convection and Earth rotation
CSEDI合作研究:地球深层结构的联合地震-地球动力学约束——对地幔对流和地球自转的影响
  • 批准号:
    1902400
  • 财政年份:
    2019
  • 资助金额:
    $ 24.5万
  • 项目类别:
    Continuing Grant
Collaborative Research: Improving lower mantle seismic sampling and model resolution using multi-bounce and diffracted waves
合作研究:利用多次反射波和衍射波提高下地幔地震采样和模型分辨率
  • 批准号:
    1648770
  • 财政年份:
    2016
  • 资助金额:
    $ 24.5万
  • 项目类别:
    Continuing Grant
Collaborative Research: Seismic Investigation of Slab Structure and Back Arc Volcanism in the Sea of Japan Region
合作研究:日本海地区板状构造和弧后火山活动的地震调查
  • 批准号:
    1547494
  • 财政年份:
    2015
  • 资助金额:
    $ 24.5万
  • 项目类别:
    Continuing Grant
Collaborative Research: NorthEast China Extended seiSmic Array (NECESS Array): Deep Subduction, Mantle Dynamics, and Lithospheric Evolution Beneath Northeast China
合作研究:中国东北扩展地震台阵(NECESS Array):中国东北地区深俯冲、地幔动力学和岩石圈演化
  • 批准号:
    0635855
  • 财政年份:
    2007
  • 资助金额:
    $ 24.5万
  • 项目类别:
    Continuing Grant
Collaborative Research: Africa Array - Imaging the Africa Super Plume
合作研究:非洲阵列 - 非洲超级羽流成像
  • 批准号:
    0440222
  • 财政年份:
    2005
  • 资助金额:
    $ 24.5万
  • 项目类别:
    Standard Grant
Collaborative Research: Mapping the Rivera Subduction Zone
合作研究:绘制里维拉俯冲带地图
  • 批准号:
    0335782
  • 财政年份:
    2004
  • 资助金额:
    $ 24.5万
  • 项目类别:
    Standard Grant
CSEDI Collaborative Res.: Composition and Seismic Structure of the Mantle Transition Zone
CSEDI协作研究:地幔过渡带的组成和地震结构
  • 批准号:
    0112256
  • 财政年份:
    2001
  • 资助金额:
    $ 24.5万
  • 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、成分和动力学的案例研究
  • 批准号:
    0073643
  • 财政年份:
    2000
  • 资助金额:
    $ 24.5万
  • 项目类别:
    Standard Grant
Collaborative Research: Colorado Plateau/Rio Grande Rift/ Great Plains Seismic Transect
合作研究:科罗拉多高原/里奥格兰德裂谷/大平原地震断面
  • 批准号:
    9707188
  • 财政年份:
    1999
  • 资助金额:
    $ 24.5万
  • 项目类别:
    Continuing Grant

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