Collaborative research: Multi-disciplinary investigation of the links between volcanism, marine redox, and mass extinction during the Late Triassic and Early Jurassic

合作研究：对晚三叠世和早侏罗世期间火山活动、海洋氧化还原和大规模灭绝之间的联系进行多学科调查

• 批准号: 2026918
• 负责人: Jeremy Owens
• 金额: $ 21.13万
• 依托单位: Florida State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2026918&HistoricalAwards=false
• 关键词: Collaborative; research; Multi; disciplinary; investigation

The end-Triassic mass extinction that occurred ~210 million years ago was one of the largest in Earth’s history. Understanding the timeline of environmental stresses that led to this event and similar events, provide important context for understanding current and future global change. Our current understanding is limited, mostly because of the limited geographic coverage of data and most of exisiting studies narrowly focus on the time interval of the mass extinction itself. This study will address these gaps by investigating a record of environmental and biologic change that is recorded in the fossils and chemistry of sedimentary rocks now located in the Wrangell Mountains of Alaska. This unique sequence of rocks represent marine sediments that were deposited in an understudied part of the planet — the Paleo-Pacific or Panthalassic Ocean. Additionally, this project will enable the mentorship and scientific training of graduate and undergraduate students and will involve a number of public outreach activities that highlight the interdisciplinary nature of geoscience research used to tackle big scientific problems like the causes of mass extinctions. Museum and traveling exhibits will be developed and the project team will engage in visits to high school science classrooms and public science open houses.This study will use a multi-disciplinary approach to develop a more holistic understanding of the geographic and temporal record of marine diversity and redox conditions within the oceans before, during, and after the end-Triassic mass extinction from an understudied Panthalassic Ocean site. This will be accomplished by studying the long-term Late Triassic through Early Jurassic time interval recorded in the McCarthy Formation in the Wrangell Mountains of Alaska. Paleontological data will be collected for four major taxonomic groups (ammonoids, bivalves, conodonts, corals); geochemical data (carbon, sulfur, and thallium isotopes; iron speciation; redox-sensitive trace metal abundances); and uranium-lead dates from ash beds. Through the careful integration of the paleontological, geochemical, and geochronological results, the proposed study will provide a framework for understanding the relationship between the biotic, marine redox, and carbon cycle changes. Results of the proposed study will be used to directly assess and temporally constrain the timing of (1) marine diversity losses and recovery, (2) local and global environmental changes, and (3) the potential factors that led to mass extinction and allowed for faunal recovery during the Late Triassic to Early Jurassic.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

大约2.1亿年前发生的三叠纪质量扩展是地球历史上最大的质量。了解导致该事件和类似事件的环境压力的时间表，为了解当前和未来的全球变化提供了重要背景。我们目前的理解是有限的，主要是因为数据的地理覆盖范围有限，并且大多数生活研究都狭窄地关注质量扩展本身的时间间隔。这项研究将通过研究在阿拉斯加Wrangell山脉的沉积岩化石和化学中记录的环境和生物学变化的记录来解决这些差距。这种独特的岩石序列代表了海洋沉积物，这些沉积物被沉积在地球的一个理解部分 - 古太平洋或泛质海洋。此外，该项目将实现研究生和本科生的精神训练和科学培训，并将涉及许多公共外展活动，这些活动强调了地球科学研究的跨学科性质，用于解决大规模扩展的原因。将开发博物馆和巡回展览，项目团队将参观高中科学教室和公共科学开放式房屋。这项研究将使用多学科的方法来对海洋多样性和临时记录进行更全面的了解，以了解海洋多样性和临时记录。这将通过研究阿拉斯加朗格尔山脉麦卡锡组中记录的早期侏罗纪时间间隔来研究长期的三叠纪晚期三叠纪。将为四个主要的分类群（氨基生物，双壳类，牙能，珊瑚）收集古生物学数据；地球化学数据（碳，硫和Tollium同位素；铁规格；对氧化还原敏感的痕量金属丰度）；和铀铅从灰床上延续。通过仔细整合古生物学，地球化学和年代学结果，拟议的研究将为了解生物，海洋氧化还原和碳循环变化之间的关系提供一个框架。拟议的研究的结果将用于直接评估并暂时恢复（1）海洋多样性损失和恢复的时间，（2）地方和全球环境变化，以及（3）导致大规模扩展并允许在三叠纪晚期的动物恢复的潜在因素，这些因素在早期的侏罗纪期间与NSF的合法宣言和统计的奖励有关，这表明NSF的智力及其依据是由NSF的统计依据，并且是由NSF的支持，并依靠NSF的支持。 标准。