CAREER: Very Broadband Rheology and the Internal Dynamics of Plate Boundaries on Earth
职业:超宽带流变学和地球板块边界的内部动力学
基本信息
- 批准号:1056332
- 负责人:
- 金额:$ 40.72万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2011
- 资助国家:美国
- 起止时间:2011-10-01 至 2016-09-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Plate boundaries are the locus of both focused heat flow and intense seismic activity. A critical problem in the dynamics of plate boundaries is to understand how deformation organizes internally to produce the macroscopic strength, structure and efficiency of heat and mass transport. To address these questions from an observational perspective, we need to extract as much information as possible from the seismic wave field about the viscosity structure. The core of this project is a methodology for calculating rheological properties across the broad spectrum of time scales relevant to geophysics, from seismic wave frequencies to strain rates associated with plate tectonics, referred to here as "Very Broadband Rheology". While developing the methodology, I am applying it to a range of (proto-) plate boundary settings in a comparative approach (e.g. East African Rift and the margins of the Colorado Plateau/Basin & Range provinces), in collaboration with seismologists, petrologists, geodesists and geodynamicists.For a given set of thermodynamic variables (including state, compositional and structural variables), we calculate the elastic, anelastic and viscous properties. However, there is a great deal of incomplete understanding in all aspects of this problem, both in seismology (in the methodology of inversion of the seismic wave field for velocity and attenuation distribution in the Earth) and in mineral/rock physics (in the processes at the micro- and meso-scales that determine the mechanical properties across the spectrum of time scales). Constructing this methodology will illuminate what is not known and also what is important to know, and how sensitive our solutions and interpretations will be to each source of uncertainty. We can assess, for example, the relative severity of the uncertainties in the thermal structure compared to uncertainty in the effects of water and melt on viscosity, attenuation and elasticity. A flexible and open source methodology for this mapping will enable the community to assess the holes and limitations in our collective understanding. The educational components of this project include the development of a graduate-level course on the observational, theoretical and experimental background for this methodology.
板块边界是集中热流和强烈地震活动的所在地。板块边界动力学中的一个关键问题是了解变形如何在内部组织以产生宏观强度、结构和热量和质量传递的效率。为了从观测的角度解决这些问题,我们需要从地震波场中提取尽可能多的关于粘度结构的信息。该项目的核心是一种计算与地球物理相关的广谱时间尺度流变特性的方法,从地震波频率到与板块构造相关的应变率,这里被称为“Very Broadband流变学”。在开发方法的同时,我与地震学家、岩石学家、大地测量学家和地球动力学家合作,以比较的方式将其应用于一系列(原型)板块边界设置(例如东非裂谷和科罗拉多高原/盆地和山脉省份的边缘)。对于一组给定的热力学变量(包括状态、组成和结构变量),我们计算了弹性、非弹性和粘性。然而,在这个问题的各个方面,无论是在地震学(地震波场在地球上的速度和衰减分布的反演方法)还是在矿物/岩石物理学(在微观和中观尺度上确定跨越时间尺度的力学特性的过程)中,都有大量的不完整的理解。构建这种方法论将阐明什么是未知的,什么是重要的,以及我们的解决方案和解释对每个不确定性来源的敏感性。例如,与水和熔体对粘度、衰减和弹性的影响的不确定性相比,我们可以评估热结构不确定性的相对严重程度。这种映射的灵活和开源方法将使社区能够评估我们集体理解中的漏洞和限制。这个项目的教育部分包括开发一门研究生水平的课程,介绍这种方法的观察、理论和实验背景。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Benjamin Holtzman其他文献
A new age of fuel performance code criteria studied through advanced atomistic simulation techniques
通过先进的原子模拟技术研究燃料性能规范标准的新时代
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2011 - 期刊:
- 影响因子:0
- 作者:
Benjamin Holtzman - 通讯作者:
Benjamin Holtzman
Benjamin Holtzman的其他文献
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{{ truncateString('Benjamin Holtzman', 18)}}的其他基金
Collaborative Research: Towards a new framework for interpreting mantle deformation: integrating theory, experiments, and observations spanning seismic to convective timescales
合作研究:建立解释地幔变形的新框架:整合从地震到对流时间尺度的理论、实验和观测
- 批准号:
2218224 - 财政年份:2022
- 资助金额:
$ 40.72万 - 项目类别:
Continuing Grant
Collaborative Research: SI2-SSI: Inquiry-Focused Volumetric Data Analysis Across Scientific Domains: Sustaining and Expanding the yt Community
合作研究:SI2-SSI:跨科学领域以调查为中心的体积数据分析:维持和扩展 yt 社区
- 批准号:
1663893 - 财政年份:2017
- 资助金额:
$ 40.72万 - 项目类别:
Standard Grant
Mapping variability in the thermo-mechanical structure of the North American Plate and upper mantle
绘制北美板块和上地幔热力结构的变异性
- 批准号:
1736165 - 财政年份:2017
- 资助金额:
$ 40.72万 - 项目类别:
Standard Grant
Collaborative Research: An Experimental Investigation of Reactive Melt Channelization in Partially Molten Rocks
合作研究:部分熔融岩石中反应熔体通道化的实验研究
- 批准号:
1459664 - 财政年份:2015
- 资助金额:
$ 40.72万 - 项目类别:
Standard Grant
Collaborative Research: Immersive Audio-visualization of Seismic Wave Fields in the Earth (EarthScope Education & Outreach)
合作研究:地球地震波场的沉浸式视听(EarthScope Education
- 批准号:
1147763 - 财政年份:2012
- 资助金额:
$ 40.72万 - 项目类别:
Standard Grant
Dynamical coupling of deformation and melt transport in the Earth: A combined theoretical and experimental study
地球变形与熔体输运的动力耦合:理论与实验相结合的研究
- 批准号:
1141976 - 财政年份:2012
- 资助金额:
$ 40.72万 - 项目类别:
Standard Grant
Collaborative Research: Evaluating the Roles of Melt Migration and Mantle Flow in Lithospheric Evolution: The Colorado Plateau as a Geodynamic Laboratory for EarthScope
合作研究:评估熔体迁移和地幔流在岩石圈演化中的作用:科罗拉多高原作为 EarthScope 的地球动力学实验室
- 批准号:
0952202 - 财政年份:2010
- 资助金额:
$ 40.72万 - 项目类别:
Continuing Grant
MARGINS Postdoctoral Fellowship: Deciphering the Role of Melt Segregation and Strain Partitioning in Rifting Continents
MARGINS 博士后奖学金:破译熔体分离和应变分配在裂谷大陆中的作用
- 批准号:
0646696 - 财政年份:2007
- 资助金额:
$ 40.72万 - 项目类别:
Standard Grant
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