COLLABORATIVE RESEARCH: Chemostratigraphic Analysis of Panthalassic and Tethyan Permian-Triassic Boundary Sections: Assessment of Global Paleoceanographic Dynamics

合作研究：泛古纪和特提斯二叠纪-三叠纪边界剖面的化学地层分析：全球古海洋动力学评估

• 批准号: 0745817
• 负责人: Arne Winguth
• 金额: $ 11.49万
• 依托单位: University of Texas at Arlington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0745817&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Chemostratigraphic; Analysis; Panthalassic

COLLABORATIVE RESEARCH: Chemostratigraphic Analysis of Panthalassic and Tethyan Permian-Triassic Boundary Sections: Assessment of Global Paleoceanographic DynamicsEAR-0745574 Thomas Algeo, University of Cincinnati¡XLeadEAR-0745393 Brooks B. Ellwood, Louisiana State UniversityEAR-0746189 Katherine Freeman, Pennsylvania State UniversityEAR-0745592 Timothy Lyons, University of California, RiversideEAR-0745817 Arne Winguth and Harry Rowe, University of Texas, ArlingtonABSTRACTThe causes and dynamics of the Permian-Triassic boundary (PTB) mass extinction, the largest in Earth history, remain uncertain. Gradual deterioration of marine and terrestrial environments during the Late Permian and persistence of inhospitable conditions through the Early Triassic suggest that intrinsic factors were important, but an extinction rate peak, abrupt lithofacies changes, and geochemical anomalies associated with the end-Permian event horizon are evidence of a catastrophic event (e.g., massive volcanic eruption, bolide impact, and/or large-scale oceanic overturn). Despite long study of the PTB, there are remarkably few integrated, high-resolution chemostratigraphic studies of marine boundary sections that can address critical questions related to the extent and intensity of Permo-Triassic deep-ocean anoxia, patterns of upwelling of toxic deep-ocean waters onto shallow-marine shelves and platforms, the relationship of such events to contemporaneous changes in seawater carbonate saturation and to the delayed recovery of marine biotas, controls on the post-extinction global negative C-isotope shift, and the relative timing and causal relationship of PTB crises in the marine and terrestrial realms. In this project, we propose to generate geochemical proxy datasets consisting of magnetic susceptibility, elemental concentrations, TOC-TIC, ?Ô13Ccarb-?Ô13Corg, S-Fe speciation, ?Ô34Ssulfide-?Ô34Ssulfate, REEs, and biomarkers for a total of 19 sections in eight study areas, including 8 sections in four areas of the former Panthalassic Ocean (the Cache Creek terrane, Western Sedimentary Basin, and Sverdrup Basin of Canada, and the Maitai-Waipapa terranes of New Zealand) and 11 sections in four areas of the former Tethys Ocean (Vietnam-China, India, Iran, and Italy). Conodont biostratigraphy combined with C-isotope and MS event stratigraphy will facilitate correlations within and between study areas. Paleoceanographic modeling will be used to investigate the effects of potential forcings on Permo-Triassic ocean chemistry and sedimentary fluxes, and comparisons with globally integrated chemostratigraphic datasets will allow refinement of model simulations. This project has the potential to yield important new findings regarding events at the Permian-Triassic boundary and key insights regarding proximate and ultimate controls on contemporaneous chemical oceanographic perturbations. Investigation of catastrophic climate and environmental change associated with the largest mass extinction in Earth history should be of considerable interest to both the Earth-science community and the scientifically literate public. The broader impacts of the project are varied and include public outreach and dissemination of project results, mentoring of undergraduate and graduate students, development of research synergies among a diverse group of geoscience professionals, and the potential for results of broad scientific significance. The PIs are committed to training the next generation of scientists (they have collectively supervised ~60 graduate students, and all are actively engaged in advising and training undergraduate students), to advancing science education in the public schools, and to achieving greater ethnic and gender diversity among these future scholars (Algeo and Ellwood are both involved in programs to recruit minority students). Project datasets funded through NSF will be made available to the larger scientific community through CHRONOS and PaleoStrat.

合作研究：泛质和特蒂亚固定质 - 三叠纪边界段的化学地层学分析：全球古洋基狂学动力学的评估-0745574托马斯·阿尔乔奥（Thomas Algeo），辛辛那提大学托马斯·阿尔乔州立大学AR-0745592蒂莫西·里昂斯（Timothy Lyons），加利福尼亚大学Riversideear-0745817 Arne Winguth和Harry Rowuth和Harry Rowe，德克萨斯大学，Arlingtonabstract，二叠纪三叠纪边界（PTB）质量扩展的原因和动态，地球历史上最大的质量仍然不确定。通过早期三叠纪的晚期二叠纪和持久性条件的持续存在逐渐确定海洋和陆地环境，这表明内在因素很重要，但延长率的峰值，突然的岩性变化，地球化学异常和近端事件范围相关的地球范围是灾难性事件的证据（例如，大众越来越多（例如，大众越来越多的optipt off off off offeript offeriptip offeript off off。尽管对PTB进行了长时间的研究，但对海洋边界部分的整合，高分辨率的化学术语研究很少，可以解决有关渗透性深度渗透性的深度和强度有关的关键问题，这些问题的深度深度冲突，有毒的深层水域上升的上升模式，在浅层海水中，在浅层海水中，在浅层层次上造成了延迟的事件，以及这些延迟的事件，以及这些延迟的事件，以及这些事件的延迟，与层次的迁移，以及与此类延伸的延迟关系，以及与层次的关系，以及与层次的相关性，与层次的相关性，与浅层的迁移，以及层次的关系，与层次的关系，与层次的关系，以及与层次的关系，以及沿着这些事件的关系，以及沿着这些事件的关系，以及沿着这些事件的关系。海洋生物群体，控制了后全球负面C异位转移的控制，以及在海洋和陆地领域中PTB危机的相对时机和灾难性关系。 In this project, we propose to generate geochemical proxy datasets consisting of magnetic susceptibility, elemental concentrations, TOC-TIC, ?Ô13Ccarb-?Ô13Corg, S-Fe specification, ?Ô34Ssulfide-?Ô34Ssulfate, REEs, and biomarkers for a total of 19 sections in eight study areas, Includes 8 sections in four areas of the former Panthalassic Ocean（Cache Creek Terrane，西部沉积盆地和加拿大的Sverdrup盆地，以及新西兰的Maitai-Waipapa Terranes）和前Tethys海洋四个地区（越南海洋，印度，印度，伊朗，伊朗和意大利）的四个地区。结合C-同位素和MS事件层学结合的牙能生物描绘将有助于研究领域内和之间的相关性。古华型建模将用于研究潜在的强制性对近三叠纪海洋化学和沉积通量的影响，并且与全球整合化学地层数据集的比较将允许对模型模拟进行改进。该项目有可能产生有关二叠纪三叠纪边界事件的重要新发现，以及有关当代化学海洋扰动的近端和最终控制的关键见解。对地球历史上最大的质量扩展相关的灾难性气候和环境变化的调查应引起地球科学界和科学识字的公众的关注。该项目的更广泛的影响是多种多样的，包括公众的推广和项目结果的传播，本科生和研究生的心理，发展的地球科学专业人员群体之间的研究协同作用以及具有广泛科学意义的结果的潜力。 PI致力于培训下一代科学家（他们共同监督了约60名研究生，并且所有人都积极从事咨询和培训本科生），在公立学校中推进科学教育，并在这些未来的学者中获得更大的民族和性别多样性（Algeo和Ellwood都参与了招募少数学科的计划）。通过NSF资助的项目数据集将通过Chronos和Paleostrat提供给更大的科学界。