CSEDI Collaborative Research: Application of Siderophile Elements to Early Earth Processes and Mantle Mixing

CSEDI合作研究:亲铁元素在早期地球过程和地幔混合中的应用

基本信息

  • 批准号:
    1265147
  • 负责人:
  • 金额:
    $ 17万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2013
  • 资助国家:
    美国
  • 起止时间:
    2013-08-01 至 2015-02-28
  • 项目状态:
    已结题

项目摘要

Siderophile elements are those chemical elements with a strong preference for metal compared to silicates. For the Earth, the abundances of these elements were strongly affected by segregation of the metallic core, and also likely affected by processes that occurred exclusively in the silicate portion of the early Earth (mantle and crust). For this project, we will conduct collaborative, synergistic research combining observations of siderophile element concentrations and isotopic compositions, with geodynamic modeling to study the origin and evolution of chemical heterogeneities in Earth's early mantle. The outcome of this work will be an improved understanding of the global processes that led to the establishment of siderophile element abundances in the mantle, as well as provide new insights to the differentiation and mixing histories of the mantle. One specific task will be to examine the petrologic and chronologic extents of 182W isotopic anomalies in terrestrial rocks. As the decay product of the short-lived 182Hf (t½ = 9 million years), variations in 182W likely reflect processes that occurred within the mantle during the first 30 million years of Earth history. Both ancient rocks, such as komatiites for which we have already identified isotopic anomalies, and modern rocks, such as mid-ocean ridge basalts, oceanic peridotites, and ocean island basalts will be examined. Complementary to this work, we will model large-scale processes, such as magma ocean crystallization, with the potential to generate mantle domains characterized by the elemental abundances and fractionations necessary to produce the observed isotopic variances. This project will involve serious contributions from undergraduate participants at the University of Maryland (UMd). As such, some of the research proposed here will help to indoctrinate budding scientists in the methods used in isotopic geochemistry and geodynamic modeling, as well as the presentation of results. The project will also involve postdocs at both institutions. The collaborative nature of the proposal, as well as the close proximity of the UMd and Carnegie Institution for Science, will allow frequent, direct interactions involving both geochemical data acquisition and geodynamic modeling of the results for the PI?s and postdocs working on this project.
亲铁元素是那些与硅酸盐相比对金属具有强烈偏好的化学元素。对于地球来说,这些元素的丰度受到金属核分离的强烈影响,也可能受到早期地球硅酸盐部分(地幔和地壳)专门发生的过程的影响。在这个项目中,我们将进行合作,协同研究结合亲铁元素浓度和同位素组成的观测,与地球动力学建模,研究地球早期地幔化学不均匀性的起源和演化。这项工作的成果将是一个更好的理解全球过程,导致建立亲铁元素丰度在地幔中,以及提供新的见解地幔的分化和混合的历史。一个具体的任务将是检查的岩石学和年代学范围的182 W同位素异常在陆地岩石。作为短命的182 Hf(t1/2 = 900万年)的衰变产物,182 W的变化可能反映了地球历史前3000万年地幔内发生的过程。既有古老的岩石,如我们已经发现同位素异常的科马提岩,也有现代的岩石,如洋中脊玄武岩、大洋橄榄岩和洋岛玄武岩。作为对这项工作的补充,我们将模拟大规模的过程,如岩浆海洋结晶,有可能产生地幔域的特征是元素丰度和分馏所必需的,以产生所观察到的同位素差异。这个项目将涉及严重的贡献,从本科参与者在马里兰州大学(UMD)。因此,这里提出的一些研究将有助于向新兴科学家灌输同位素地球化学和地球动力学建模所用的方法,以及结果的呈现。该项目还将涉及这两个机构的博士后。该提案的合作性质,以及UMD和卡内基科学研究所的密切联系,将允许频繁,直接的互动,涉及地球化学数据采集和地球动力学建模的结果为PI?和博士后在这个项目上工作。

项目成果

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Linda Elkins-Tanton其他文献

Linda Elkins-Tanton的其他文献

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{{ truncateString('Linda Elkins-Tanton', 18)}}的其他基金

CSEDI Collaborative Research: Application of Siderophile Elements to Early Earth Processes and Mantle Mixing
CSEDI合作研究:亲铁元素在早期地球过程和地幔混合中的应用
  • 批准号:
    1523350
  • 财政年份:
    2014
  • 资助金额:
    $ 17万
  • 项目类别:
    Standard Grant
CSEDI Collaborative Research: Application of siderophile elements to mantle geodynamics
CSEDI合作研究:亲铁元素在地幔地球动力学中的应用
  • 批准号:
    1160656
  • 财政年份:
    2012
  • 资助金额:
    $ 17万
  • 项目类别:
    Standard Grant
Infrastructure for Interdisciplinary Research in Earth and Space Science at the Carnegie Institution
卡内基研究所地球与空间科学跨学科研究基础设施
  • 批准号:
    0963396
  • 财政年份:
    2010
  • 资助金额:
    $ 17万
  • 项目类别:
    Standard Grant
CAREER: Building rocky planets: From Mercury and Vesta to GL 581c
职业:建造岩石行星:从水星和灶神星到 GL 581c
  • 批准号:
    0747154
  • 财政年份:
    2008
  • 资助金额:
    $ 17万
  • 项目类别:
    Standard Grant
Collaborative Research: The Siberian Traps and the end-Permian Extinction: Coincidence and Causality
合作研究:西伯利亚地盾与二叠纪末灭绝:巧合与因果关系
  • 批准号:
    0807585
  • 财政年份:
    2008
  • 资助金额:
    $ 17万
  • 项目类别:
    Continuing Grant
Collaborative Research: Lithospheric removal: The Sierra Nevada as the prototype of a fundamental process in mountain building
合作研究:岩石圈去除:内华达山脉作为造山基本过程的原型
  • 批准号:
    0754205
  • 财政年份:
    2007
  • 资助金额:
    $ 17万
  • 项目类别:
    Continuing grant
Collaborative Research: Lithospheric removal: The Sierra Nevada as the prototype of a fundamental process in mountain building
合作研究:岩石圈去除:内华达山脉作为造山基本过程的原型
  • 批准号:
    0607702
  • 财政年份:
    2006
  • 资助金额:
    $ 17万
  • 项目类别:
    Continuing Grant
Proposal for a workshop on understanding the formation of the Siberian Traps and its effects on climate and life
关于举办关于了解西伯利亚地盾的形成及其对气候和生命影响的研讨会的提案
  • 批准号:
    0531990
  • 财政年份:
    2005
  • 资助金额:
    $ 17万
  • 项目类别:
    Standard Grant
Lithospheric Controls on Flood Basalt Volcanism
岩石圈对溢流玄武岩火山活动的控制
  • 批准号:
    0309057
  • 财政年份:
    2003
  • 资助金额:
    $ 17万
  • 项目类别:
    Continuing Grant

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合作研究:CSEDI:在俯冲带环境中整合地震各向异性、地幔流和岩石变形
  • 批准号:
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合作研究:CSEDI:在俯冲带环境中整合地震各向异性、地幔流和岩石变形
  • 批准号:
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合作研究:CSEDI:在俯冲带环境中整合地震各向异性、地幔流和岩石变形
  • 批准号:
    2153910
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    2022
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CSEDI Collaborative Research: The nature and timing of Earth's accretion
CSEDI 合作研究:地球吸积的性质和时间
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    2054884
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CSEDI合作研究:了解大型星子碰撞对冥古宙地幔动力学的影响
  • 批准号:
    2102571
  • 财政年份:
    2021
  • 资助金额:
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    2102777
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    Standard Grant
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    2054912
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    2021
  • 资助金额:
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