NSFGEO-NERC: After the cataclysm: cryptic degassing and delayed recovery in the wake of Large Igneous Province volcanism

NSFGEO-NERC：灾难之后：大火成岩省火山活动后的神秘排气和延迟恢复

• 批准号: NE/Y00650X/1
• 负责人: Benjamin Mills
• 金额: $ 32.74万
• 依托单位: University of Leeds
• 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%2FY00650X%2F1
• 关键词: NSFGEO; NERC; After; cataclysm; cryptic

Large Igneous Province (LIP) volcanism is associated with extraordinary mantle melting and voluminous eruptive episodes, which have been linked to mass extinctions of life throughout the Phanerozoic.Significant research over the last three decades has brought the extreme nature of these events into focus. But controls on the nature and tempo of recovery, a topic of emerging interest that highlights potential Earth system tipping points and state shifts, remain unknown. Unexpectedly protracted greenhouse conditions and delayed recovery following multiple Phanerozoic LIPs underscore a fundamental lack of understanding, either of LIP magmatic climate forcing processes or global silicate weathering feedbacks. We propose that cryptic LIP outgassing and weathering combine to shape climate and life after the main phase of volcanism. This proposal will support a multi-disciplinary effort combining field observations; high-resolution records of volcanism, climate, weathering, and paleobiota; and numerical modeling to understand co-evolution of solid and surface Earth during perturbation and recovery. We will leverage three powerful natural laboratory LIPs and climate events, building from the youngest and best-resolved, the Columbia River Basalts and Mid-Miocene Climatic Optimum; to the more voluminous North Atlantic Igneous Province, Paleocene-Eocene Thermal Maximum, and Early Eocene Climatic Optimum; and finally to the Siberian Traps, catastrophic end-Permian mass extinction, and early Triassic hothouse.This project will support an interdisciplinary joint U.S.-U.K. project team including two early career PIs and a sustained outreach/inreach effort in northeastern Oregon, the epicenter of Columbia River Basalt volcanism and site of project field work.

大火成岩省 (LIP) 火山活动与异常的地幔融化和大量喷发事件有关，这些事件与整个显生宙的生命大规模灭绝有关。过去三十年的重大研究使这些事件的极端性质成为人们关注的焦点。但对复苏的性质和节奏的控制仍然是未知数，这是一个新兴的话题，强调了潜在的地球系统临界点和状态转变。意外的长期温室条件和多次显生宙 LIP 后的恢复延迟凸显了人们对 LIP 岩浆气候强迫过程或全球硅酸盐风化反馈的根本缺乏了解。我们认为，在火山活动的主要阶段之后，神秘的 LIP 排气和风化作用共同塑造了气候和生命。该提案将支持结合实地观察的多学科努力；火山活动、气候、风化和古生物群的高分辨率记录；和数值模拟，以了解固体和表面地球在摄动和恢复过程中的共同演化。我们将利用三个强大的自然实验室 LIP 和气候事件，从最年轻和解决最好的哥伦比亚河玄武岩和中中新世气候最佳事件开始；到面积更大的北大西洋火成岩省、古新世-始新世最热期和早始新世气候最佳期；最后是西伯利亚地盾、二叠纪末灾难性的大规模灭绝和三叠纪早期的温室。该项目将支持一个跨学科的美国-英国联合项目团队，包括两名早期职业 PI 以及在俄勒冈州东北部（该地区的震中）的持续外展/内展工作。哥伦比亚河玄武岩火山活动和项目现场工作地点。