Collaborative Research: Modeling of Earthquake-Related Pore Pressure Changes and Fluid Flow in Subduction Zones: Implications for Planning of Drilling and Long-Term Observatories

合作研究：俯冲带地震相关孔隙压力变化和流体流动建模：对钻井和长期观测站规划的影响

• 批准号: 0241565
• 负责人: Shemin Ge
• 金额: $ 8.1万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-05-01 至 2006-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0241565&HistoricalAwards=false
• 关键词: Collaborative; Research; Modeling; Earthquake; Related

This project will study the hydrodynamic response of subduction zones to seismic events by using an analytical model of coseismic pore pressure generation and a numerical model of fluid flow following an earthquake. The results will help make better use of pore pressures as strain indicators. As observatories that monitor pore pressure are established in subduction zones, it will be necessary to understand how pressure changes will vary with deformation style and magnitude, how flow systems will respond to seismic events, and how thermal or geochemical anomalies may be generated by coseismic deformation. The results will also help determine what drilling and monitoring strategies will yield the greatest information concerning deformation and fluid flow in subduction complexes.

本项目将利用同震孔隙压力生成的分析模型和地震后流体流动的数值模型，研究俯冲带对地震事件的水动力反应。研究结果将有助于更好地利用孔隙压力作为应变指标。 由于在俯冲带建立了监测孔隙压力的观测站，因此有必要了解压力变化如何随变形类型和规模而变化，流动系统如何对地震事件作出反应，以及同震变形如何产生热或地球化学异常。研究结果还将有助于确定什么样的钻探和监测策略将产生有关俯冲复合体中变形和流体流动的最大信息。