Inversion of Nankai Trough High Resolution Two-Ship Profile

南海海槽高分辨率两船剖面反演

• 批准号: 9000327
• 负责人: Paul Stoffa
• 金额: $ 11.75万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-03-15 至 1993-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9000327&HistoricalAwards=false
• 关键词: Inversion; Nankai; Trough; Resolution; Two

Covergent plate margin tectonice depends critically on the physical properties which control the mechanical state and style of deformation. Porosity, permeability, pore pressure and sediment strength are important rock properties which influence the deformation response. In 1987 the PI's collected 7 expanding spread profiles (ESP's) and 5 split spread profiles (SSp's) across the Nankaj Trough off Japan. The ESP's and SSP'shave been inverted for compressional wave velocity using travel-time information. The PI's now propose to implement two full waveform inversion techniques and apply these to ESP and SSP data from the Nankai Trough. They will apply both a layer-stripping inversion method and an iterative forward modeling cheme to evaluate their performane. These inversions will result in a more detailed estimate of compressional wave velocity, density, and possibly shear wavy velocity. These quantities will then be used to construct two transects of sediment physical properties in the zone of maximum strain near the base of the trench.

板块边缘的构造活动主要取决于 控制机械状态的物理性质 和变形方式。孔隙度、渗透率、孔隙压力 和沉积物强度是重要的岩石性质， 影响变形响应。1987年私家侦探收集了 7个扩展点差配置文件（ESP）和5个拆分点差 日本近海南卡海槽的SSp剖面。ESP的 并对SSP'进行了纵波速度反演 使用传播时间信息。PI现在建议实施 两种全波形反演技术，并将其应用于ESP 以及来自南海海槽的SSP数据。他们将同时应用A 剥层反演方法和迭代正演 建模方案，以评估其性能。这些反演 将导致更详细的压缩估计 波速、密度和可能的剪切波速度。 这些数量将用于构建两个样条 最大应变带沉积物物理性质的变化 在战壕底部附近