Global plate tectonics and mantle convection with damage memory

全球板块构造和具有损伤记忆的地幔对流

基本信息

  • 批准号:
    1853856
  • 负责人:
  • 金额:
    $ 37.5万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    2019
  • 资助国家:
    美国
  • 起止时间:
    2019-03-15 至 2024-02-29
  • 项目状态:
    已结题

项目摘要

Plate tectonics is fundamental for Earth's evolution and the surface expression of mantle convection. However, it is unclear how the narrow and strongly deforming boundaries between the more rigid plates form. The reactivation of plate boundaries, in particular, gives the continental plates a long-term hysteresis with profound implications for tectonics. This project seeks to better understand the causes and consequences of damage memory in convection. Funding will support a female graduate student and speak to issues outside geodynamics including the quest for a general law describing fault behavior from the seismic cycle to long-term Earth evolution. The project will also support new international collaborations, and research outcomes will be disseminated widely, including for UT Austin's GeoFORCE K-12 outreach program.This project will implement strain-dependent weakening into global, numerical convection models in order to explore the style of "plate tectonics" that is generated by visco-plastic mantle flow. Incorporating such rheological memory will allow study of the full range of tectonic behavior, including how plate boundary evolution and plate motions are linked with the deep mantle. A range of viscous damage formulations will be explored and benchmarked against grain-size evolution theories and other suggested mechanisms for strain-localization, such as formation of shear bands and mechanical anisotropy due to lattice preferred orientation of olivine. Model results will be compared with geological constraints including plate kinematics, with particular focus on the time-dependence of plate boundary geometry, plate speeds and sizes, and seafloor age distributions. The overall goal is to develop a theoretical understanding of the role of tectonic inheritance in terrestrial planet evolution and heat transport.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
板块构造是地球演化和地幔对流地表表现的基础。然而,目前还不清楚更坚硬的板之间狭窄和强烈变形的边界是如何形成的。特别是板块边界的重新激活,给大陆板块带来了长期的滞后,对构造学有着深远的影响。该项目旨在更好地理解对流中损伤记忆的原因和后果。资助将支持一名女研究生,并就地球动力学以外的问题发表演讲,包括寻求描述从地震周期到地球长期演化的断层行为的一般规律。该项目还将支持新的国际合作,研究成果将得到广泛传播,包括德克萨斯大学奥斯汀分校的GeoFORCE K-12推广计划。该项目将在全球数值对流模式中实施应变相关的减弱,以探索由粘塑性地幔流动产生的“板块构造”风格。结合这种流变性记忆将允许研究全面的构造行为,包括板块边界演化和板块运动如何与深部地幔联系在一起。将探索一系列粘性损伤公式,并以颗粒尺寸演化理论和其他建议的应变局部化机制为基准,例如由于橄榄石晶格择优取向而形成的剪切带和机械各向异性。模型结果将与包括板块运动学在内的地质约束进行比较,特别侧重于板块边界几何形状、板块速度和大小以及海底年龄分布随时间的变化。总体目标是从理论上理解构造继承在类地行星演化和热传输中的作用。这一奖项反映了NSF的法定使命,并通过使用基金会的智力优势和更广泛的影响审查标准进行评估,被认为值得支持。

项目成果

期刊论文数量(8)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Role of strain-dependent weakening memory on the style of mantle convection and plate boundary stability
应变相关的弱化记忆对地幔对流类型和板块边界稳定性的作用
  • DOI:
    10.1093/gji/ggz167
  • 发表时间:
    2019
  • 期刊:
  • 影响因子:
    2.8
  • 作者:
    Fuchs, Lukas;Becker, Thorsten W
  • 通讯作者:
    Becker, Thorsten W
Plume‐Slab Interactions Can Shut Off Subduction
地幔柱与板片的相互作用可以阻止俯冲作用
  • DOI:
    10.1029/2022gl099286
  • 发表时间:
    2022
  • 期刊:
  • 影响因子:
    5.2
  • 作者:
    Heilman, Erin;Becker, Thorsten W.
  • 通讯作者:
    Becker, Thorsten W.
Deformation Memory in the Lithosphere: A Comparison of Damage‐dependent Weakening and Grain‐Size Sensitive Rheologies
岩石圈中的变形记忆:损伤依赖性弱化和颗粒尺寸敏感流变学的比较
Convection in Thin Shells of Icy Satellites: Effects of Latitudinal Surface Temperature Variations
  • DOI:
    10.1029/2018je005799
  • 发表时间:
    2019-08
  • 期刊:
  • 影响因子:
    0
  • 作者:
    M. Weller;L. Fuchs;T. Becker;K. Soderlund
  • 通讯作者:
    M. Weller;L. Fuchs;T. Becker;K. Soderlund
On the Role of Rheological Memory for Convection‐Driven Plate Reorganizations
流变记忆对对流驱动板重组的作用
  • DOI:
    10.1029/2022gl099574
  • 发表时间:
    2022
  • 期刊:
  • 影响因子:
    5.2
  • 作者:
    Fuchs, L.;Becker, T. W.
  • 通讯作者:
    Becker, T. W.
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Thorsten Becker其他文献

12 Up and Over: How Do Rivers Climb Mountains? Constraining groundwater’s role in forming crater lake inlets on early Mars
12 反复:河流如何攀爬山脉?限制地下水在形成早期火星火山口湖入口方面的作用?
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Hiruni Dissanayake;Naveen Sudharsan;Dev K. Niyogi;Lochana Kalyanaraman;Ifeanyichukwu Nduka;Cameron Cummins;Geeta Persad;Enrique Morales;Nicola Tisato;Erick Herrera;Caitlin Moeller;Doug Hemingway;Jesse Do;Lucia Bellino;Chenguang Sun;Jhovanni Loeza;Eric Hiatt;Marc A. Hesse;Jorge Garcia;Huiwen Sun;Thorsten Becker;Daniel Trugman;Julia Daniel;Jacqueline Epperson;M. Malkowski;Keira Boehle;Ramon Gil
  • 通讯作者:
    Ramon Gil
Notfallversorgung in Industrieanlagen
  • DOI:
    10.1007/s10049-022-01095-9
  • 发表时间:
    2022-11-22
  • 期刊:
  • 影响因子:
    1.100
  • 作者:
    Thorsten Becker
  • 通讯作者:
    Thorsten Becker

Thorsten Becker的其他文献

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{{ truncateString('Thorsten Becker', 18)}}的其他基金

Collaborative Research: Toward an integrated modeling framework for physics-based estimates of megathrust rupture potential
合作研究:建立基于物理的巨型逆冲破裂潜力估计的综合建模框架
  • 批准号:
    2121666
  • 财政年份:
    2021
  • 资助金额:
    $ 37.5万
  • 项目类别:
    Continuing Grant
Collaborative Research: Vertical signatures of lithospheric deformation in the western US
合作研究:美国西部岩石圈变形的垂直特征
  • 批准号:
    2045292
  • 财政年份:
    2021
  • 资助金额:
    $ 37.5万
  • 项目类别:
    Standard Grant
Collaborative Research: Resolving Earth Structure Influence on Ice-Sheet Stability in the Wilkes Subglacial Basin (RESISSt)
合作研究:解决地球结构对威尔克斯冰下盆地冰盖稳定性的影响 (RESISSt)
  • 批准号:
    1914743
  • 财政年份:
    2020
  • 资助金额:
    $ 37.5万
  • 项目类别:
    Standard Grant
Collaborative Research: Consequences of flat slab subduction on the chemical, structural, and dynamic evolution of continental lithosphere
合作研究:平板俯冲对大陆岩石圈化学、结构和动态演化的影响
  • 批准号:
    1925939
  • 财政年份:
    2019
  • 资助金额:
    $ 37.5万
  • 项目类别:
    Standard Grant
Collaborative Research: Structure and depth extent of lithospheric shear zones surrounding continental transform faults
合作研究:大陆转换断层周围岩石圈剪切带的结构和深度范围
  • 批准号:
    1927216
  • 财政年份:
    2019
  • 资助金额:
    $ 37.5万
  • 项目类别:
    Standard Grant
Collaborative Research: RAPID: Using the M6.4-7.1 Ridgecrest, CA Earthquake sequence to test a postseismic stress evolution monitoring system
合作研究:RAPID:使用加利福尼亚州里奇克莱斯特 M6.4-7.1 地震序列测试震后应力演化监测系统
  • 批准号:
    1944717
  • 财政年份:
    2019
  • 资助金额:
    $ 37.5万
  • 项目类别:
    Standard Grant
RCN: Planning for a Modeling Collaboratory for Subduction Zone Science
RCN:俯冲带科学建模实验室规划
  • 批准号:
    1824343
  • 财政年份:
    2018
  • 资助金额:
    $ 37.5万
  • 项目类别:
    Standard Grant
Collaborative Research: Multi-scale models of subduction zone earthquake cycle observations
合作研究:俯冲带地震周期观测的多尺度模型
  • 批准号:
    1722680
  • 财政年份:
    2017
  • 资助金额:
    $ 37.5万
  • 项目类别:
    Standard Grant
Collaborative Research: Shear-wave Splitting and Mantle Dynamics of the North American Plate
合作研究:北美板块的剪切波分裂和地幔动力学
  • 批准号:
    1719204
  • 财政年份:
    2016
  • 资助金额:
    $ 37.5万
  • 项目类别:
    Continuing Grant
Estimating global subduction mass transport
估计全球俯冲质量传输
  • 批准号:
    1720839
  • 财政年份:
    2016
  • 资助金额:
    $ 37.5万
  • 项目类别:
    Standard Grant

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基于ITS探讨软骨下骨rod-plate微结构重塑在骨关节炎发病机制中的作用
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破冰:从木卫二冰俯冲的数值模拟中洞察板块构造的演化
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