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

基本信息

  • 批准号:
    1927246
  • 负责人:
  • 金额:
    $ 12.53万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2019
  • 资助国家:
    美国
  • 起止时间:
    2019-10-01 至 2024-09-30
  • 项目状态:
    已结题

项目摘要

At continental transform faults such as the San Andreas, one tectonic plate slides horizontally relative to its neighbor. Because such faults lie on land and often in populated areas, the resulting earthquakes dramatically impact local populations. It remains debated how plates deform beneath the shallow (~10 km), top layer where earthquakes are generated. At larger depths, underlying rocks transition from brittle to ductile deformation. But whether the shear zone underneath the fault remains narrow for tens of km, or whether deformation widens right away is not clear. These different scenarios affect how faults are loaded, and have significant implications for seismic hazard assessment. Here, the team uses existing seismic records to investigate six major continental transform faults. Deformed rocks often exhibit crystal preferred orientations, fabrics, that can be detected with seismic waves. This is because rock fabrics affect the wave velocity which then depends on the propagation direction. By analyzing the anisotropy of seismic waves passing underneath the fault zones, the researchers probe the geometry and extent of rocks deformation. They also use geodynamic modeling constrained by geological observations; for given fault geometries and deformation properties, they predict seismic anisotropy features underneath the faults. By comparing observations and predictions, the team unravels the deformation behavior of continental transform faults. The project fosters an international collaboration with Australia and Switzerland. It provides support and training to a female graduate student, and outreach toward undergraduates and K12 students - notably from group underrepresented in Sciences - and the public. The team uses data from existing deployments crossing six continental transform faults (San Andreas, North Anatolian, Denali, New Zealand Alpine, Altyn Tagh/Kunlun, and Dead Sea). It conducts full-waveform 2-D and 3-D modeling of teleseismic shear wave splitting, as well as anisotropic receiver function analysis. The goal is to image the shear zone and broader deformation field surrounding each transform fault. The selected faults represent transforms of different ages and maturity. Existing splitting observations show systematic contrasts between faults. Combining high-resolution shear zone imaging and geodynamic modeling, the researchers investigate the degree of strain localization in the lithosphere and the shear zone geometry. They also study the possible roles of mechanical anisotropy and inherited fabrics. This project is a critical step toward establishing a model for continental lithospheric transforms and better assessing the corresponding earthquake hazards.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.
在大陆转换断层,如圣安德烈亚斯,一个构造板块相对于其邻近板块水平滑动。由于这些断层位于陆地上,而且往往位于人口稠密的地区,因此引发的地震极大地影响了当地人口。关于板块如何在浅层(约10公里)下变形,这是地震的发源地,仍然存在争议。在更大的深度,下伏的岩石从脆性变形过渡到韧性变形。但断层下的剪切带是否在数十公里内保持狭窄,或者变形是否立即扩大尚不清楚。这些不同的情景会影响断层的加载方式,并对地震危险性评估产生重大影响。在这里,该团队利用现有的地震记录来调查六个主要的大陆转换断层。变形的岩石通常表现出晶体择优取向和组构,这可以用地震波检测到。这是因为岩石组构影响波速,然后波速取决于传播方向。通过分析地震波在断层下传播的各向异性,研究人员探索了岩石变形的几何和程度。他们还使用受地质观测约束的地球动力学模型;对于给定的断层几何形状和变形属性,他们预测断层下的地震各向异性特征。通过比较观测和预测,该团队揭示了大陆转换断层的变形行为。该项目促进了与澳大利亚和瑞士的国际合作。它为一名女研究生提供支持和培训,并向本科生和K12学生--特别是在科学界代表性不足的群体--和公众提供服务。该团队使用了横跨六个大陆转换断层(圣安德烈亚斯、北安纳托利亚、德纳利、新西兰阿尔卑斯山、阿尔金/昆仑和死海)的现有部署数据。它进行了远震横波分裂的全波形二维和三维模拟,以及各向异性接收函数分析。目标是成像每个转换断层周围的剪切带和更广泛的形变场。选定的断层代表了不同年龄和成熟度的转换。现有的分裂观测显示了断层之间的系统对比。结合高分辨率剪切带成像和地球动力学模拟,研究人员调查了岩石圈应变局部化程度和剪切带几何形状。他们还研究了机械各向异性和遗传结构的可能作用。该项目是朝着建立大陆岩石圈转换模型和更好地评估相应的地震危险迈出的关键一步。该奖项反映了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(3)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Imaging the Tectonic Grain of the Northern Cordillera Orogen Using Transportable Array Receiver Functions
  • DOI:
    10.1785/0220200182
  • 发表时间:
    2020-11
  • 期刊:
  • 影响因子:
    3.3
  • 作者:
    V. Schulte‐Pelkum;J. Caine;James V. Jones;T. Becker
  • 通讯作者:
    V. Schulte‐Pelkum;J. Caine;James V. Jones;T. Becker
Tectonic Inheritance During Plate Boundary Evolution in Southern California Constrained From Seismic Anisotropy
  • DOI:
    10.1029/2021gc010099
  • 发表时间:
    2021-08
  • 期刊:
  • 影响因子:
    3.7
  • 作者:
    V. Schulte‐Pelkum;T. Becker;W. Behr;M. Miller
  • 通讯作者:
    V. Schulte‐Pelkum;T. Becker;W. Behr;M. Miller
Tectonic Inheritance With Dipping Faults and Deformation Fabric in the Brittle and Ductile Southern California Crust
  • DOI:
    10.1029/2020jb019525
  • 发表时间:
    2020-07
  • 期刊:
  • 影响因子:
    0
  • 作者:
    V. Schulte‐Pelkum;Z. Ross;K. Mueller;Y. Ben‐Zion
  • 通讯作者:
    V. Schulte‐Pelkum;Z. Ross;K. Mueller;Y. Ben‐Zion
{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ monograph.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ sciAawards.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ conferencePapers.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ patent.updateTime }}

Vera Schulte-Pelkum其他文献

Draining Nevada
排干内华达州
  • DOI:
    10.1038/ngeo532
  • 发表时间:
    2009-06-01
  • 期刊:
  • 影响因子:
    16.100
  • 作者:
    Vera Schulte-Pelkum
  • 通讯作者:
    Vera Schulte-Pelkum

Vera Schulte-Pelkum的其他文献

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

{{ truncateString('Vera Schulte-Pelkum', 18)}}的其他基金

Volcanic transcrustal magmatic systems imaged with teleseismic converted phases
使用远震转换相位成像的火山穿地壳岩浆系统
  • 批准号:
    2051243
  • 财政年份:
    2021
  • 资助金额:
    $ 12.53万
  • 项目类别:
    Standard Grant
Collaborative research: Implementation of Tensor Visualization guide (TVguide), an interactive visualization, analysis, and database tool for seismic anisotropy
合作研究:张量可视化指南(TVguide)的实施,这是一种用于地震各向异性的交互式可视化、分析和数据库工具
  • 批准号:
    1947765
  • 财政年份:
    2020
  • 资助金额:
    $ 12.53万
  • 项目类别:
    Continuing Grant
Building a continent: Integration of surface geology, rock physics, and seismic observations to investigate the tectonic history of the contiguous United States
构建大陆:整合地表地质学、岩石物理学和地震观测来研究美国本土的构造历史
  • 批准号:
    1735890
  • 财政年份:
    2017
  • 资助金额:
    $ 12.53万
  • 项目类别:
    Standard Grant
Collaborative research: A joint seismic and geodetic investigation into the structure and behavior of an intracontinental subduction zone, Nepal
合作研究:对尼泊尔大陆内俯冲带的结构和行为进行联合地震和大地测量调查
  • 批准号:
    1645009
  • 财政年份:
    2017
  • 资助金额:
    $ 12.53万
  • 项目类别:
    Standard Grant
The role of hot crust in mountain building: Testing the alpha-beta quartz transition as a crustal geothermometer
热地壳在造山中的作用:作为地壳地温计测试 α-β 石英转变
  • 批准号:
    1344582
  • 财政年份:
    2014
  • 资助金额:
    $ 12.53万
  • 项目类别:
    Standard Grant
Is continental collision thick- or thin-skinned? Combining local seismicity with receiver functions in the Zagros Fold-and-Thrust Belt
大陆碰撞是厚脸皮还是薄脸皮?
  • 批准号:
    1246287
  • 财政年份:
    2013
  • 资助金额:
    $ 12.53万
  • 项目类别:
    Standard Grant
Crustal Deformation across the U.S. from Harmonic Analysis of Receiver Functions
通过接收函数的谐波分析得出美国各地的地壳变形
  • 批准号:
    1251193
  • 财政年份:
    2013
  • 资助金额:
    $ 12.53万
  • 项目类别:
    Continuing Grant
Collaborative Research: Dynamics of the Southern Rocky Mountains from Cross-term Estimates of the Seismic Green Tensor
合作研究:根据地震绿色张量的跨期估计来了解落基山脉南部的动力学
  • 批准号:
    1142008
  • 财政年份:
    2012
  • 资助金额:
    $ 12.53万
  • 项目类别:
    Standard Grant
Lowrider: The Where, When, and How of Continental Crustal Underplating
Lowrider:大陆地壳底侵的地点、时间和方式
  • 批准号:
    1053291
  • 财政年份:
    2011
  • 资助金额:
    $ 12.53万
  • 项目类别:
    Standard Grant
Collaborative Research: High-resolution receiver function imaging of crustal structure in the Southern Great Basin, Nevada
合作研究:内华达州南部大盆地地壳结构的高分辨率接收函数成像
  • 批准号:
    0838509
  • 财政年份:
    2009
  • 资助金额:
    $ 12.53万
  • 项目类别:
    Standard Grant

相似国自然基金

Research on Quantum Field Theory without a Lagrangian Description
  • 批准号:
    24ZR1403900
  • 批准年份:
    2024
  • 资助金额:
    0.0 万元
  • 项目类别:
    省市级项目
Cell Research
  • 批准号:
    31224802
  • 批准年份:
    2012
  • 资助金额:
    24.0 万元
  • 项目类别:
    专项基金项目
Cell Research
  • 批准号:
    31024804
  • 批准年份:
    2010
  • 资助金额:
    24.0 万元
  • 项目类别:
    专项基金项目
Cell Research (细胞研究)
  • 批准号:
    30824808
  • 批准年份:
    2008
  • 资助金额:
    24.0 万元
  • 项目类别:
    专项基金项目
Research on the Rapid Growth Mechanism of KDP Crystal
  • 批准号:
    10774081
  • 批准年份:
    2007
  • 资助金额:
    45.0 万元
  • 项目类别:
    面上项目

相似海外基金

Collaborative Research: The influence of incoming plate structure and fluids on arc melt generation at the Lesser Antilles subduction system
合作研究:来料板结构和流体对小安的列斯群岛俯冲系统电弧熔化产生的影响
  • 批准号:
    2316136
  • 财政年份:
    2024
  • 资助金额:
    $ 12.53万
  • 项目类别:
    Continuing Grant
Collaborative Research: The influence of incoming plate structure and fluids on arc melt generation at the Lesser Antilles subduction system
合作研究:来料板结构和流体对小安的列斯群岛俯冲系统电弧熔化产生的影响
  • 批准号:
    2316137
  • 财政年份:
    2024
  • 资助金额:
    $ 12.53万
  • 项目类别:
    Continuing Grant
Collaborative Research: Manipulating the Thermal Properties of Two-Dimensional Materials Through Interface Structure and Chemistry
合作研究:通过界面结构和化学控制二维材料的热性能
  • 批准号:
    2400352
  • 财政年份:
    2024
  • 资助金额:
    $ 12.53万
  • 项目类别:
    Standard Grant
Collaborative Research: Manipulating the Thermal Properties of Two-Dimensional Materials Through Interface Structure and Chemistry
合作研究:通过界面结构和化学控制二维材料的热性能
  • 批准号:
    2400353
  • 财政年份:
    2024
  • 资助金额:
    $ 12.53万
  • 项目类别:
    Standard Grant
Collaborative Research: Assembling the foundation of modern mammal community structure in the first 7 million years after the K/Pg mass extinction
合作研究:为 K/Pg 大规模灭绝后的前 700 万年建立现代哺乳动物群落结构的基础
  • 批准号:
    2321344
  • 财政年份:
    2023
  • 资助金额:
    $ 12.53万
  • 项目类别:
    Standard Grant
Collaborative Research: Accurate and Structure-Preserving Numerical Schemes for Variable Temperature Phase Field Models and Efficient Solvers
合作研究:用于变温相场模型和高效求解器的精确且结构保持的数值方案
  • 批准号:
    2309547
  • 财政年份:
    2023
  • 资助金额:
    $ 12.53万
  • 项目类别:
    Standard Grant
Collaborative Research: Reducing Model Uncertainty by Improving Understanding of Pacific Meridional Climate Structure during Past Warm Intervals
合作研究:通过提高对过去温暖时期太平洋经向气候结构的理解来降低模型不确定性
  • 批准号:
    2303568
  • 财政年份:
    2023
  • 资助金额:
    $ 12.53万
  • 项目类别:
    Continuing Grant
Collaborative Research: Structure and function: How microenvironment facilitates antimicrobial response to environmental stress in a defensive symbiosis
合作研究:结构和功能:微环境如何促进防御性共生中的抗菌剂对环境应激的反应
  • 批准号:
    2247195
  • 财政年份:
    2023
  • 资助金额:
    $ 12.53万
  • 项目类别:
    Standard Grant
Collaborative Research: Molecular and Nanoscale Structure and Interactions of PFAS at Interfaces and Mixed Surfactant Systems
合作研究:PFAS 的分子和纳米结构以及界面和混合表面活性剂体系的相互作用
  • 批准号:
    2227128
  • 财政年份:
    2023
  • 资助金额:
    $ 12.53万
  • 项目类别:
    Standard Grant
Collaborative Research: Structure, Dynamics, and Catalysis with Dilute Bimetallic and Single Atom Alloy Nanoparticles
合作研究:稀双金属和单原子合金纳米粒子的结构、动力学和催化作用
  • 批准号:
    2300020
  • 财政年份:
    2023
  • 资助金额:
    $ 12.53万
  • 项目类别:
    Standard Grant
{{ showInfoDetail.title }}

作者:{{ showInfoDetail.author }}

知道了