RUI: DEVELOPING A PREDICTIVE MODEL OF STRAIN ACCOMMODATION FOR SEGMENTED NORMAL FAULT EVOLUTION, SEVIER FAULT ZONE, SOUTHERN UTAH

RUI：开发分段正断层演化的应变调节预测模型，塞维尔断层带，犹他州南部

基本信息

批准号：
2042114
负责人：
Benjamin Surpless
金额：
$ 19.28万
依托单位：
Trinity University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2021
资助国家：
美国
起止时间：
2021-08-01 至 2024-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2042114&HistoricalAwards=false
关键词：
RUI DEVELOPING PREDICTIVE MODEL STRAIN

项目摘要

When tectonic stresses build within the Earth’s crust, faults form to relieve those stresses. These faults move bodies of rock past each other, commonly resulting in earthquakes that cause significant damage to nearby areas. Faults that produce large earthquakes are commonly composed of many smaller fault segments that interact with each other. These fault segments affect the rock around them, fracturing it such that fluids can more easily flow below the ground surface; fluid flow in this context has implications for geothermal energy, groundwater flow, and petroleum resources. This project will investigate the Sevier fault zone in southern Utah and develop a predictive model of fault zone development that can be used to address issues related to earthquake hazards and to better target potential energy resources. The project will integrate field instruction, field research, and computer modeling, to help undergraduate researchers learn fundamental geological processes in the context of their own research. The PI will recruit and retain research students from under-represented groups and will measure student learning throughout the research process. All scientific and educational results from this project will be disseminated as broadly as possible.This project will investigate the kinematic and dynamic evolution of segmented normal faults, which is critical for the assessment of earthquake hazard, energy resources, and groundwater flow and storage. The project team will use a range of methods to elucidate the relationship between mechanical stratigraphy, structural position relative to propagating fault segments, and damage zone evolution during segment propagation and linkage. Field and remote-sensing methods will be integrated with petrographic analysis, mechanical stratigraphy, and structure-from-motion (SfM) modeling to develop testable models of fault zone evolution. The variations in fault segment and relay ramp geometries along the Sevier fault zone, related to changes in along-strike fault displacement, will provide an opportunity to document the sequential development of fractures, deformation bands, and minor faults during segmented fault zone evolution. Computer kinematic and dynamic modeling of documented fault geometries and displacements will permit hypothesis testing in the context of collected field data. This project will provide a new and detailed understanding of how permeability evolves during segmented fault zone evolution.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.

当构造应力在地壳内建立时，会形成挽救这些压力的断层。这些断层将岩石的身体彼此移动，通常导致地震，从而对近区域造成重大破坏。产生大地震的断层通常由许多相互相互作用的较小的断层段组成。这些断层段会影响它们周围的岩石，使其破裂，使得烟更容易在地面以下流动。在这种情况下，流体流对地热能，地下水流量和石油资源具有影响。该项目将调查犹他州南部的Sevier断层区，并开发出断层区开发的预测模型，该模型可用于解决与地震危害有关的问题并更好地针对势能资源。该项目将整合现场指导，现场研究和计算机建模，以帮助本科研究人员在自己的研究中学习基本的地质过程。 PI将招募和保留来自代表性不足的小组的研究学生，并将在整个研究过程中衡量学生的学习。该项目的所有科学和教育结果将尽可能广泛地传播。该项目将调查分段正常断层的运动学和动态演化，这对于评估地震危害，能源资源，地下水流量和存储至关重要。项目团队将使用一系列方法来阐明机械层学，相对于传播断层段的结构位置与段传播和链接期间的损伤区的演变之间的关系。场和遥感方法将与岩石学分析，机械层学和结构 - 运动（SFM）建模集成，以开发故障区域演化的可测试模型。断层段和沿Sevier断层区域沿线断层区域变化的断层段和继电器坡道几何形状的变化将提供一个机会，以记录裂缝，变形带和较小断层在分段断层区域演化期间的顺序发展。记录的故障几何和位移的计算机运动学和动态建模将允许在收集的现场数据的背景下进行假设测试。该项目将提供对分段断层区演化过程中如何演变的渗透率如何发展的新的，详细的理解。该奖项反映了NSF的法定任务，并通过使用基金会的知识分子优点和更广泛的影响审查标准来通过评估来诚实地表示支持。