Fluid Flow in a Deforming Thrust Terrane

变形逆冲地体中的流体流动

• 批准号: 9725711
• 负责人: David Wiltschko
• 金额: $ 10.14万
• 依托单位: Texas A&M Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-12-01 至 2001-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9725711&HistoricalAwards=false
• 关键词: Fluid; Flow; Deforming; Thrust; Terrane

9725711 Wiltschko There is a general consensus that high fluid pressure is an important controlling mechanism for the evolution of accretionary prisms and the motion of individual thrust sheets in a continental fold and thrust belt. However, the existence of such high fluid pressure in ancient thrust belts remains problematical for lack of direct evidence in ancient continental thrust belts, this project will develop a more complete hydromechnical model of a layered wedge that incorporates strength and hydraulic heterogeneity. Data on actual mechanical properties of rocks such as yield strength, strain hardening/softening behavior and hydrologic permeability will be included in a finite element analysis. Results should provide a critical wedge model that includes these important hydrologic and mechanical parameters so that the role of high fluid pressure during rock deformation can be properly assessed.

小行星9725711 人们普遍认为，高流体压力是大陆褶皱冲断带中增生棱柱体演化和单个冲断岩席运动的重要控制机制。 然而，由于缺乏古大陆冲断带的直接证据，古冲断带中是否存在如此高的流体压力仍然存在疑问，本项目将开发一个更完整的分层楔体的水力力学模型，该模型将强度和水力非均匀性结合起来。 岩石的实际力学性能数据，如屈服强度、应变硬化/软化行为和水文渗透性，将包括在有限元分析中。 结果应提供一个关键的楔模型，包括这些重要的水文和力学参数，使岩石变形过程中的高流体压力的作用，可以适当地评估。