Studies in Western U.S. Geodynamics

美国西部地球动力学研究

• 批准号: 0509965
• 负责人: Eugene Humphreys
• 金额: $ 16万
• 依托单位: University of Oregon Eugene
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-07-01 至 2008-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0509965&HistoricalAwards=false
• 关键词: Studies; Western; U.S.; Geodynamics

Intellectual Merit:Three regional studies will address the processes responsible for the tectonicbehavior in each region. The study areas are:1) Southern California. Study will focus on the cause of mountain building in thetransform-fault environment of the San Andreas fault;2) the Sierra Nevada. Study will focus on the tectonic strengths of the boundingSan Andreas fault and eastern California shear zone and on the nature of thegravitationally driven extension of the Basin and Range; and3) the Pacific Northwest. Study will focus on the interplay between the sheartectonics imposed by Pacific-North America interaction and the subduction margin,which varies from weakly to strongly compressive.These regional studies will be modeled in a manner consistent with plate scale stressesand will be used to improve the current plate scale dynamic model.The proposed research will be accomplished in two and three dimensions with a finiteelement computer simulations that incorporate faults, viscous and plastic rock deformationmechanisms, and gravity-driven processes in realistic ways.This project will produce results that will help to understand the relative importanceof plate interaction and internal buoyancy driven continental deformation.Also, improved models of the distribution and rate of deformation will be producedbased on geodetic and geologic faulting data. These results will be used both to evaluatethe quality of the computer simulations and to constrain lithospheric strength.Broader Impacts:Results will help constrain the strength and behavior of faults, which is important tounderstanding earthquake processes.This project will prepare a graduate student for the future through collaborations,participation in a diverse set of disciplines, and integration of the range of findingsinto consistent results. It also will help foster an international collaboration.

智力优点：三项区域研究将解决负责每个地区构造行为的过程。 研究领域是：1）南加州。 研究将重点介绍圣安德烈亚斯断层的山区建筑物的原因； 2）内华达山脉。 研究将重点介绍界限的构造强度，安德烈亚斯断层和东加州剪切带，以及盆地和范围的延长延伸的性质； 3）西北太平洋。 研究将重点关注太平洋 - 北美互动与俯冲边缘所施加的相互作用之间的相互作用，从弱到强烈压迫，这些区域研究将以与板尺度应力相一致的方式进行建模。这些区域研究将用于改善当前板尺度的动态模型。将在两种和三层的层次上均与有限的型号融合到有限层的计算机上，以使有限层的计算机融合到有限的层次上，该模型将其结合起来，以使有限的计算机融合在一起，该模型将以有限的数量融合，并将其融合为有限的模型。变形机制和重力驱动的过程以现实的方式。该项目将产生结果，有助于了解板块相互作用和内部浮力驱动的大陆变形的相对重要性。此外，改进的变形分布模型和变形速率还将产生基于地球和地质故障数据。 这些结果将用于评估计算机模拟的质量并限制岩石圈强度。BOADER的影响：结果将有助于限制故障的力量和行为，这是重要的地震过程的重要性。该项目将通过与各种型号和整合范围的研究范围的协作来为未来的研究生做好准备。 这也将有助于建立国际合作。