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Lithospheric Evolution in the Tanzanian Craton and Adjoining Mozambique Belt, East Africa: Perspectives From the Lower Crust

Lithospheric Evolution in the Tanzanian Craton and Adjoining Mozambique Belt, East Africa: Perspectives From the Lower Crust
东非坦桑尼亚克拉通和毗邻莫桑比克带的岩石圈演化:来自下地壳的视角
批准号:
0337255
负责人:
Roberta Rudnick
金额:
$0.0万
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
2004
资助国家:
美国
项目状态:
已结题
起止时间:
2004-01-15 至 2008-12-31

项目摘要

项目成果

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中文摘要
翻译
这项工作将确定坦桑尼亚大陆地壳的热历史,以了解地幔和板块构造过程。莫桑比克活动带的岩石形成于太古宙,但在~2.0 Ga Usagaran造山和~600 Ma泛非造山两个独立的造山事件中被强烈加热和重结晶。克拉通-活动带边界也形成了今天大陆裂谷的地点,沿着一个推定的板块先前存在弱点的地点。来自莫桑比克带的样品将用各种技术进行研究,以确定其压力-温度历史,特别是对富含铀的矿物进行测年,这些矿物的放射性时钟在不同的温度下重置。这些测量将跟踪板块厚度随时间的演变,以及在造山事件期间侵入地壳的地幔来源的高温岩浆的数量。这些结果将揭示大陆板块在造山和裂谷过程中的行为,以及导致大陆板块内部弱点定位的参数。马里兰大学、达累斯萨拉姆大学和麻省理工学院的科学家将参与这项工作。
英文摘要
This work will determine the thermal history of Tanzanian continental crust to understand mantle and plate tectonic processes. Rocks of the Mozambique mobile belt formed in the Archean, but were strongly heated and recrystallized during two separate mountain-building events: the ~2.0 Ga Usagaran orogeny and the ~600 Ma pan-African orogeny. The craton-mobile belt boundary also forms the site of present-day continental rifting, along a presumed site of pre-existing weakness in the plate. Samples from the Mozambique Belt will be studied with various techniques to determine their pressure-temperature history, especially dating uranium-rich minerals whose radioactive clocks are reset at different temperatures. The measurements will track the evolving thickness of the plate through time, and the amount of hot, mantle-derived magmas that intruded the crust during the mountain-building events. These results will shed light on the behavior of continental plates during mountain building and rifting, as well as the parameters responsible for localization of weakness within the continental plate. The work will involved scientists from the University of Maryland, the University of Dar-es-Salaam, and MIT.
期刊论文(0)
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科研奖励(0)
会议论文
Collaborative Research: Halogen and chlorine isotope behavior during metamorphism of metapelitic rocks
How do sedimentary rocks become part of the lower continental crust?
2019 Interior of the Earth GRC/GRS
  • 批准号:
    1918478
  • 项目类别:
    Standard Grant
  • 资助金额:
    $4.8万
  • 财政年份:
    2019
  • 负责人:
    Roberta Rudnick
  • 依托单位:
Chalcophile Element Geochemistry
国内基金
海外基金
Galaxy Analytical Modeling Evolution (GAME) and cosmological hydrodynamic simulations.
  • 批准号:
  • 项目类别:
    省市级项目
  • 资助金额:
    10.0万元
  • 批准年份:
    2025
  • 负责人:
    Antonios Katsianis
  • 依托单位:
Understanding structural evolution of galaxies with machine learning
  • 批准号:
  • 项目类别:
    省市级项目
  • 资助金额:
    10.0万元
  • 批准年份:
    2022
  • 负责人:
    Nicola Rosario Napolitano
  • 依托单位:
The formation and evolution of planetary systems in dense star clusters
  • 批准号:
    11043007
  • 项目类别:
    专项基金项目
  • 资助金额:
    10.0万元
  • 批准年份:
    2010
  • 负责人:
    柯文采
  • 依托单位:
Improving modelling of compact binary evolution.
  • 批准号:
    10903001
  • 项目类别:
    青年科学基金项目
  • 资助金额:
    20.0万元
  • 批准年份:
    2009
  • 负责人:
    史蒂芬
  • 依托单位: