Collaborative Research: The Siberian Traps and the end-Permian Extinction: Coincidence and Causality

合作研究：西伯利亚地盾与二叠纪末灭绝：巧合与因果关系

• 批准号: 0807585
• 负责人: Linda Elkins-Tanton
• 金额: $ 132.72万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-08-15 至 2015-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0807585&HistoricalAwards=false
• 关键词: Collaborative; Research; Siberian; Traps; end

This project address an important, and unresolved question in Earth evolution, i.e. did the eruption of the Siberian Large Igneous Province (LIP) a.k.a. Siberian Traps cause the Permo-Triassic extinction? In reality there are two questions at the heart of this proposal; what causes flood basalts and do flood basalts cause extinctions? These questions have been the subject of active research for several decades. One of the unique aspects of this project is that both are addressed simultaneously by an international team of experts whose goal is to gain an in-depth understanding of this LIP from its origin to both short-and long-term effects on Earth systems. The PIs will use a large suite of techniques: geochemistry, geothermometry, paleomagnetics, seismology, geodynamics, paleontology, and climate modeling to achieve their goal. Specifically, the PIs will: create high-precision eruption time scales for the entire volcanic succession, thus obtaining flux rates; quantify the volatile loads of the igneous rocks including lavas, intrusives, and in particular the voluminous tuffs; quantify volatile release from country rocks; begin to map the crustal and upper-mantle structure beneath the region using existing seismic data and geodynamical modeling; study the climatic consequences of sulfur injection and buildup of atmospheric carbon dioxide; and continue detailed studies of the end-Permian extinction, using paleontology, stable isotope geochemistry, and geochronology.Broader Impacts:The PI team consists of scientists from 7 different countries. A central repository will be created for samples obtained under this project. Information will be maintained on the web and material made available to other scientists. A documentary film producer associated with the National Geographic Corporation will be in the field with the PIs gathering footage for a film about the project. Additional coverage is will be provided through the American Museum of Natural History?s Science Bulletins, short films about current research that are shown at the AMNH and distributed to over 40 science centers and museums around the world.

该项目解决了地球进化中一个重要且尚未解决的问题，即西伯利亚大型火成岩省（Lip）又称西伯利亚陷阱的爆发会导致腐蚀性灭绝吗？ 实际上，该提议的核心有两个问题。 是什么导致洪水玄武岩并造成洪水造成灭绝？ 几十年来，这些问题一直是积极研究的主题。 该项目的独特方面之一是，两者都由一个国际专家团队同时解决，他们的目标是深入了解这种唇部从其起源到短期和对地球系统的长期影响。 PI将使用大量技术：地球化学，地热量，古磁学，地震学，地球动力学，古生物学和气候建模来实现其目标。 具体而言，PIS将：为整个火山演替创建高精度的喷发时间尺度，从而获得通量速率；量化火成岩的挥发性载荷，包括熔岩，侵入物，尤其是大量的凝灰岩；量化从乡村岩石中释放的挥发性释放；开始使用现有的地震数据和地球动力学建模来绘制区域下的地壳和上层结构。研究硫注射和大气二氧化碳的积累的气候后果；并继续详细研究最终验证，使用古生物学，稳定的同位素地球化学和地球人工学。Broader的影响：PI团队由来自7个不同国家的科学家组成。 将为该项目中获得的样品创建中央存储库。 信息将保留在网络上，并提供给其他科学家提供的材料。 与国家地理公司相关的纪录片制片人将与PIS收集有关该项目的电影的录像在现场。 美国自然历史博物馆的科学公告将提供其他覆盖范围，有关当前研究的短片，这些电影已在AMNH上显示，并分发给了全球40多个科学中心和博物馆。