Forward modelling of mantle density anomalies from geodynamic considerations

从地球动力学角度考虑地幔密度异常的正演模型

基本信息

项目摘要

We propose a detailed mass budget analysis of the solid Earth, that is mantle and lithosphere, from geodynamic a-priori considerations. For the lithosphere and upper mantle, we will build on a published 3-D density model (3SMAC, Nataf and Ricard [1996]). For the deeper mantle, we will infer thermally induced density anomalies from a history of plate motion assimilated in global mantle circulation models. Key advances to the mantle convection model include (1) a thermodynamically self-consistent formulation of the mantle mineralogy and (2) a very high numerical resolution sufficient to resolve (for the first time) global mantle flow at Earthlike convective vigor. The benefit of the latter is to resolve thermal boundary layers at time-and length-scales appropriate for Earth¿s mantle. We will use the forward models to gain better insight on the impact of hot thermal upwellings on the mantle density budget. This is important because recent geodynamic studies have favored a larger heat flux across the core mantle boundary than prior estimates. We will test the sensitivity of mantle density models to a range of core heat flux values.
我们提出了一个详细的固体地球,即地幔和岩石圈的质量预算分析,从地球动力学先验的考虑。对于岩石圈和上地幔,我们将建立在一个已发表的三维密度模型(3SMAC,Nataf和Ricard [1996])。对于更深的地幔,我们将从全球地幔环流模型中同化的板块运动历史推断热致密度异常。地幔对流模型的关键进展包括:(1)地幔矿物学的自洽公式;(2)足以(首次)解决地球对流活力下的全球地幔流的非常高的数值分辨率。后者的好处是解决热边界层的时间和长度尺度适合地球的地幔。我们将使用正演模型,以获得更好的洞察热的热量上地幔密度收支的影响。这一点很重要,因为最近的地球动力学研究表明,穿过核幔边界的热通量比先前的估计要大。我们将测试地幔密度模型对一系列核心热通量值的敏感性。

项目成果

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Professor Dr. Hans-Peter Bunge, Ph.D.其他文献

Professor Dr. Hans-Peter Bunge, Ph.D.的其他文献

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{{ truncateString('Professor Dr. Hans-Peter Bunge, Ph.D.', 18)}}的其他基金

Retrodiction Range of geodynamic earth models from twin experiments that account for model inconsistencies and limited resolution of present-day heterogeneity
来自孪生实验的地球动力学地球模型的回顾范围,解释了模型不一致和当今异质性的有限分辨率
  • 批准号:
    412338397
  • 财政年份:
    2019
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Feasibility study to identify deep Earth signals in current and future gravity field missions
在当前和未来重力场任务中识别地球深部信号的可行性研究
  • 批准号:
    323625017
  • 财政年份:
    2016
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Determination of current geoid trends related to deep Earth processes in the South Atlantic region
确定与南大西洋地区地球深层过程相关的当前大地水准面趋势
  • 批准号:
    243973216
  • 财政年份:
    2013
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
TERRA-NEO - Integrated Co-Design of an Exascale Earth Mantle Modeling Framework
TERRA-NEO - 百亿亿次地幔建模框架的集成协同设计
  • 批准号:
    230862710
  • 财政年份:
    2012
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
Mapping the upper mantle structure beneath the South Atlantic and the adjacent continents using full waveform tomography with geodynamic interpretations of hotspot flux and material transport in the asthenosphere.
使用全波形断层扫描绘制南大西洋和邻近大陆下方的上地幔结构图,并对软流圈中的热点通量和物质传输进行地球动力学解释。
  • 批准号:
    172686521
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
Seismic waveform tomography on continental scales based on the spectral-element and adjoint methods
基于谱元和伴随方法的大陆尺度地震波形层析成像
  • 批准号:
    73582572
  • 财政年份:
    2009
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Program management and scientific networking
项目管理和科学网络
  • 批准号:
    80299618
  • 财政年份:
    2009
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
Mineralogical and Dynamic Origin of the South African Superplume
南非超羽流的矿物学和动态起源
  • 批准号:
    79644183
  • 财政年份:
    2008
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
Exploring plate tectonic force balances and plate boundary forces in the South Atlantic from plate motion histories and coupled global and regional geodynamic models
从板块运动历史和耦合的全球和区域地球动力学模型探索南大西洋的板块构造力平衡和板块边界力
  • 批准号:
    80283908
  • 财政年份:
    2008
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
Geodynamic models with thermodynamically self-consistent mineral physics
具有热力学自洽矿物物理的地球动力学模型
  • 批准号:
    41509765
  • 财政年份:
    2007
  • 资助金额:
    --
  • 项目类别:
    Research Grants

相似国自然基金

Improving modelling of compact binary evolution.
  • 批准号:
    10903001
  • 批准年份:
    2009
  • 资助金额:
    20.0 万元
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Quantifying viscous flow laws of mantle minerals for geodynamical modelling
量化地幔矿物的粘性流动定律以进行地球动力学建模
  • 批准号:
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Three-dimensional modelling of the lithospheric mantle under the Hindu Kush and Pamir: Does continental lithosphere subduct?
兴都库什和帕米尔地区岩石圈地幔的三维建模:大陆岩石圈俯冲吗?
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    518757-2018
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    2020
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    --
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    Postgraduate Scholarships - Doctoral
Three-dimensional modelling of the lithospheric mantle under the Hindu Kush and Pamir: Does continental lithosphere subduct?
兴都库什和帕米尔地区岩石圈地幔的三维建模:大陆岩石圈俯冲吗?
  • 批准号:
    518757-2018
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    2019
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    --
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Three-dimensional modelling of the lithospheric mantle under the Hindu Kush and Pamir: Does continental lithosphere subduct?
兴都库什和帕米尔地区岩石圈地幔的三维建模:大陆岩石圈俯冲吗?
  • 批准号:
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Modelling and Interpreting the Surface Evolution of the Earth in Terms of Mantle Convection: Global Implications of High Heat Flow at the Core-Mantle Boundary
根据地幔对流模拟和解释地球表面演化:核-地幔边界高热流的全球影响
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根据地幔对流模拟和解释地球表面演化:核-地幔边界高热流的全球影响
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阿尔卑斯山下方的地幔变形和俯冲极性转换的物理原理:来自热机械模型、地震各向异性和波形模型的约束
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