Mechanics and Thermal Structure of Compressional and Extensional Wedges

压缩和拉伸楔块的力学和热结构

• 批准号: 8804098
• 负责人: Francis Dahlen
• 金额: $ 19.7万
• 依托单位: Princeton University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-09-15 至 1991-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8804098&HistoricalAwards=false
• 关键词: Mechanics; Thermal; Structure; Compressional; Extensional

This grant will support continued work on the mechanics of sedimentary wedges. The PIs have developed a kinematic and thermal model of an eroding critically tapered fold-and-thrust belt, using the steady-state fold-and-thrust belt in western Taiwan as the center piece of modelling efforts. The principal new project is to extend mechanical and thermal models to the extensional counterparts of compressive wedge, namely the normally faulted wedges of material that overly shallow angle detachment faults. The PIs have developed a critical taper model of these structures which (like the model of a compressional wedge) requires good structural and especially pore-fluid pressure data to be tested. They have recently acquired an extensive set of industrial seismic and drilling data from the Brazos Ridge extensional wedge in the Gulf of Mexico for this purpose. They will develop a complete mechanical, kinematic and thermal model of an extensional wedge, using the Brazos wedge as the main example.

这笔赠款将支持沉积楔力学方面的持续研究。 PI 使用台湾西部的稳态褶皱逆冲带作为建模工作的核心部分，开发了侵蚀临界锥形褶皱逆冲带的运动学和热学模型。 主要的新项目是将机械和热模型扩展到压缩楔的延伸对应物，即通常断层的材料楔，其角度过浅的脱离断层。 PI 开发了这些结构的关键锥度模型，该模型（如压缩楔模型）需要良好的结构数据，尤其是孔隙流体压力数据进行测试。 为此，他们最近从墨西哥湾布拉索斯海岭伸展楔获取了大量工业地震和钻井数据。 他们将以 Brazos 楔块作为主要示例，开发一个完整的拉伸楔块的机械、运动学和热模型。