Faulting, fluids and geohazards within subduction zone forearcs

俯冲带弧前的断层、流体和地质灾害

• 批准号: 2892733
• 金额: --
• 依托单位: University of Southampton
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2892733
• 关键词: Faulting; fluids; geohazards; within; subduction

The project involves study of the faulting within subduction zone forearcs and associated fluids using seismic reflection and other datasets. Slip on the subduction plate-bounding fault is known to generate large magnitude earthquakes and tsunami, but also produces internal deformation through slip on many faults within the forearc, but these have not previously been systematically studied. The main aims are to understand how these different fault systems develop, how strain is distributed through a forearc, and the role faulting plays in controlling fluid flow within such systems. Gas hydrates and mud diapirism are common at many of these margins and the interaction between faulting and fluid trapping and fluid flow in these environments will be explored. Improved understanding of the development of thrust faults, and other fault types, will provide important data on how faulting affects the potential for fluid storage, including CO2 storage for decarbonisation and trapping of hydrocarbon resources. This project is also relevant to our improved understanding of geohazards in terms of how fluids affect fault slip, generating earthquakes and tsunami, and marine slope failure, which can impact seafloor infrastructure. Example subduction zones to be used in the project are Sumatra, the Makran and Cascadia.

该项目涉及使用地震反射和其他数据集对俯冲带前臂内的断层进行研究。已知俯冲板的断层在俯冲板的断层上产生大幅度地震和海啸，但也通过在前臂内的许多断层上滑动而产生内部变形，但以前尚未对这些断层进行系统的研究。主要目的是了解这些不同的断层系统如何发展，如何通过前臂分布菌株以及在控制此类系统内的流体流动方面的作用。在许多这些边缘，气体水合物和泥浆二极小在这些环境中很常见，在这些环境中的断层与流体捕获与流体流之间的相互作用将被探索。对推力断层和其他故障类型的发展的理解有了改进的了解，将提供有关故障如何影响流体储存潜力的重要数据，包括脱碳和碳氢化合物资源捕获的二氧化碳存储。该项目也与我们对地球扎第斯纳剂的了解有关流体如何影响断层滑移，产生地震和海啸以及海洋斜坡故障的理解，这可能会影响海底基础设施。该项目中要使用的俯冲带是苏门答腊，马克兰和卡斯卡迪亚。