Faulting, fluids and geohazards within subduction zone forearcs

该项目包括利用地震反射和其他数据集研究俯冲带前弧内的断层和相关流体。众所周知，俯冲板块边界断层上的滑动会产生大震级地震和海啸，但也会通过弧前许多断层上的滑动产生内部变形，但这些问题此前尚未得到系统的研究。主要目的是了解这些不同的断层系统是如何发展的，应变是如何通过前弧分布的，以及断层在控制这些系统内流体流动方面所起的作用。天然气水合物和泥底辟在这些边缘很常见，在这些环境中，断裂与流体圈闭和流体流动之间的相互作用将被探索。对逆冲断层和其他断层类型发育的进一步了解，将为断层如何影响流体储存潜力提供重要数据，包括二氧化碳的脱碳储存和油气资源的圈闭。该项目还有助于我们更好地了解地质灾害，包括流体如何影响断层滑动，产生地震和海啸，以及可能影响海底基础设施的海洋斜坡破坏。项目中使用的俯冲带包括苏门答腊、Makran和Cascadia。

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.