NSFGEO-NERC: The Cracking of a Craton: Understanding Volatile Release during Continental Breakup

NSFGEO-NERC：克拉通的破裂：了解大陆破裂期间的挥发物释放

• 批准号: NE/Z000017/1
• 负责人: Christopher Ballentine
• 金额: $ 32.12万
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2024
• 资助国家: 英国
• 起止时间: 2024 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FZ000017%2F1
• 关键词: NSFGEO; NERC; Cracking; Craton; Understanding

Volatile elements (hydrogen, carbon, nitrogen) played an essential role in the secular evolution of the solid Earth and the eventual emergence of life. Over Earth history, volatiles - including "trace volatiles" such as noble gases - have been transported between Earth's surface, crust, and mantle reservoirs, via subduction and volcanism. Continental cratons are relatively stable and potentially represent a large, yet poorly-constrained volatile reservoir (e.g., Sherwood Lollar et al., 2014). When cratons are disrupted by major volcanic and/or rifting events, they release large amounts of volatiles into Earth's crust and atmosphere. Such events also release economically important gases (e.g., helium and H2), which have long been stored in the stable craton (e.g., Ballentine and Burnard 2002; Lowenstern et al., 2014). The objective of this proposal is to determine the geological processes that control volatile production in the craton, migration through the crust and release at the surface in the form of seeps.

挥发性元素（氢，碳，氮）在固体地球的世俗演化和生命的最终出现中起着至关重要的作用。在地球历史上，通过俯冲和火山造成的挥发物（包括痕量挥发物”，例如贵重气体 - 在地球表面，地壳和地幔储层之间运输。大陆摇篮相对稳定，并有可能代表一个大而且受约束的挥发性储层（例如Sherwood Lollar等，2014）。当克拉通被重大火山和/或裂谷事件破坏时，它们将大量挥发物释放到地球的外壳和大气中。这些事件还释放了经济上重要的气体（例如氦气和H2），这些气体长期以来一直存储在稳定的克拉顿中（例如Ballentine和Burnard 2002； Lowenstern等，2014）。该提案的目的是确定控制克拉顿中挥发性产生的地质过程，迁移到地壳中，并以渗漏形式在表面释放。