Carbon Isotope studies of Phanerozoic Mass Extinction Events

显生宙大规模灭绝事件的碳同位素研究

• 批准号: 8720844
• 负责人: William Holser
• 金额: $ 1.41万
• 依托单位: University of Oregon Eugene
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-02-01 至 1990-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8720844&HistoricalAwards=false
• 关键词: Carbon; Isotope; studies; Phanerozoic; Mass

Carbon isotope studies of marine limestones detect shifts in the depositional ratio of organic carbon to carbonate carbon; profiles of 13C are correlative with major mass extinction events and changes in sea level. During the proposed renewal period we will complete characterization of the carbon isotope profile through the Late Paleozoic and the Permian/Triassic boundary. A sequence of two dozen profiles through the Permian/Triassic boundary in classic sections of the Tethys Sea, from the Alps to China, will be completed and published. A core of over 300 m through the Permian/Triassic boundary in a critical section at Gartnerkofel in the Carnic Alps of Austria, taken in September- October, 1986, will be the subject of a cross-disciplinary study by a consortium of 12 specialists. The earlier manifestations of the Late Paleozoic carbon isotope anomaly, previously detected by us and others in the Late Pennsylvanian, will be confirmed by new collections in the western USA. Geophysical and geochemical models for shifts in the carbon cycle, sea level and other geological parameters will be considered in relation to extinction events.

海洋石灰岩的碳同位素研究发现 有机碳与碳酸盐碳的沉积比值; 13 C剖面与大规模灭绝事件相关 海平面的变化。 在建议的更新期间，我们 将完成对碳同位素分布的描述 穿过晚古生代和二叠纪/三叠纪界线。 一 贯穿二叠纪/三叠纪的24个剖面序列 在特提斯海的经典部分的边界，从阿尔卑斯山到 中国，将完成并出版。 超过300米的核心 穿过二叠纪/三叠纪界线的关键部分， 奥地利卡尔尼克阿尔卑斯山的Gartnerkofel，摄于9月- 1986年10月，将是一个跨学科研究的主题 由12名专家组成的财团。 早期的表现 晚古生代碳同位素异常，以前检测到的 我们和其他人在晚宾夕法尼亚州，将被证实新的 收藏在美国西部 物化探 碳循环、海平面和其他 地质参数将被认为与灭绝有关 事件