Collaborative Research: Co-evolution of Earth and life across the Proterozoic-Phanerozoic transition: Integrated perspectives from outcrop and drill core

合作研究：元古代-显生宙过渡时期地球与生命的共同演化：露头和钻芯的综合视角

• 批准号: 2021324
• 负责人: Kimberly Lau
• 金额: $ 37.12万
• 依托单位: Pennsylvania State Univ University Park
• 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 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2021324&HistoricalAwards=false
• 关键词: Collaborative; Research; Co; evolution; Earth

The Ediacaran–Cambrian transition (~580–530 million years ago) represents one of the most profound events in the history of life on Earth, marking the sudden appearance and subsequent proliferation of all major animal groups in the fossil record. This time interval also records significant environmental change in the Earth system, including fluctuations in atmospheric oxygen concentrations and rapid motion of the continents. A number of hypotheses have been proposed to link the interactions between biotic and environmental change; however, a detailed temporal record of this time period is currently underdeveloped, and the interrelationships among changes to the marine, terrestrial, tectonic, geodynamic, and biotic systems require integration of disparate datasets from a wide spectrum of disciplines. This project assembles a diverse team of scientists to test fundamental hypotheses regarding the Earth system at the dawn of animal life by using a combination of outcrop and drill core studies to study six key Ediacaran–Cambrian regions worldwide. Field and analytical results will be combined with modelling studies to elucidate the co-evolution of life and environment across the most iconic boundary in the geologic record. The proposed study will integrate directly with established K-12 and university outreach programs both domestically and internationally, and it will contribute a variety of new educational materials to international online programs, museums, and field displays. By generating a new temporal and stratigraphic framework for the Ediacaran–Cambrian transition, this project will test hypotheses related to the co-evolution of life and environment across the most iconic boundary in the geologic record. The investigators propose to generate collaborative field- and lab-based activities to integrate sedimentological, geochemical, paleontological, geochronological, and paleomagnetic records from six key Ediacaran–Cambrian sedimentary successions worldwide. This project will also provide support to the ICDP-funded “Geological Research through Integrated Neoproterozoic Drilling: The Ediacaran–Cambrian Transition” (GRIND-ECT) project, which represents a one-time, community-wide effort for Earth scientists to obtain unique Ediacaran–early Cambrian core material. The extensive, continuous sampling throughout the Ediacaran and lower Cambrian provided by the GRIND-ECT project, coupled with the proposed field campaigns and modeling components, will provide a unique opportunity to advance Ediacaran–Cambrian chronology and set the stage for a new generation of research opportunities. Established K-12 and university outreach programs both domestically and internationally will be supported, and new educational materials to international online programs, museums, and field displays will be prepared.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.

埃迪卡拉-寒武纪的过渡（约5.8 - 5.3亿年前）是地球生命史上最深刻的事件之一，标志着化石记录中所有主要动物种群的突然出现和随后的繁殖。这个时间间隔也记录了地球系统中显著的环境变化，包括大气氧浓度的波动和大陆的快速运动。已经提出了一些假设，将生物与环境变化之间的相互作用联系起来；然而，这一时期的详细时间记录目前还不发达，海洋、陆地、构造、地球动力学和生物系统变化之间的相互关系需要来自广泛学科的不同数据集的整合。这个项目集合了一个不同的科学家团队，通过结合露头和钻芯研究来研究全球六个关键的埃迪卡拉-寒武纪区域，来测试关于动物生命初期地球系统的基本假设。现场和分析结果将与建模研究相结合，以阐明在地质记录中最具标志性的边界上生命和环境的共同进化。拟议的研究将直接整合国内和国际上已建立的K-12和大学外展计划，并将为国际在线计划，博物馆和现场展示提供各种新的教育材料。通过生成埃迪卡拉纪-寒武纪过渡的新时间和地层框架，该项目将测试有关生命和环境共同进化的假设，这些假设跨越了地质记录中最具标志性的边界。研究人员建议开展基于野外和实验室的合作活动，以整合全球六个关键埃迪卡拉-寒武纪沉积序列的沉积学、地球化学、古生物学、地质年代学和古地磁记录。该项目还将为icdp资助的“综合新元古代钻探地质研究：埃迪卡拉纪-寒武纪过渡”（GRIND-ECT）项目提供支持，该项目代表了地球科学家获得独特的埃迪卡拉纪-早寒武纪岩心材料的一次性、全社会的努力。由GRIND-ECT项目提供的贯穿埃迪卡拉纪和下寒武纪的广泛、连续采样，加上拟议的现场活动和建模组件，将为推进埃迪卡拉纪-寒武纪年代学提供一个独特的机会，并为新一代的研究机会奠定基础。在国内和国际上建立的K-12和大学外展计划将得到支持，并为国际在线计划，博物馆和现场展示准备新的教育材料。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Modeling the impacts of diagenesis on carbonate paleoredox proxies

• DOI: 10.1016/j.gca.2022.09.021
• 发表时间: 2022-09
• 期刊: Geochimica et Cosmochimica Acta
• 影响因子: 5
• 作者: K. Lau;D. Hardisty

Pannotia under prosecution

• DOI: 10.1144/sp503-2020-182
• 发表时间: 2020-09
• 期刊: Special Publications
• 作者: D. Evans