Collaborative Research: Bighorn Basin Coring Project (BBCP) - Targeted Continental Drilling of Paleogene Hyperthermals

合作研究：比格霍恩盆地取心项目（BBCP）——古近纪高温区定向大陆钻探

• 批准号: 0958821
• 负责人: William Clyde
• 金额: $ 74.03万
• 依托单位: University of New Hampshire
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-10-01 至 2015-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0958821&HistoricalAwards=false
• 关键词: Collaborative; Research; Bighorn; Basin; Coring

Bighorn Basin Coring Project (BBCP)W. Clyde, Lead PI, University of New HampshireAbstractThe Bighorn Basin Coring Project will collect ~200 meters of core from each of three sites (Polecat Bench, Gilmore Hill, Basin Substation) in the Bighorn Basin of Wyoming to better constrain the causes and effects of Paleogene hyperthermal events. Hyperthermals are abrupt, large-magnitude global warming events associated with extreme perturbations to the Earth's carbon cycle. Two events in particular will be targeted - the Paleocene-Eocene Thermal Maximum (PETM, ETM1) and the Elmo (ETM2) event. The PETM is the best documented hyperthermal and involved the release of 2,000-6,800 gigatons (Gt) of carbon from an unknown reservoir over less than 10 thousand years (ky) causing the earth to warm by 5-9ºC for a period of 100-200 ky. For comparison, the entire fossil fuel resource base on earth today is estimated to be ~5,000 Gt. Elmo is a smaller amplitude event that occurs after the PETM and just below the Chron C24N/C24R polarity reversal in marine records but remains poorly documented in continental sections. By applying a variety of sedimentological, geochemical, and palynological methods to the proposed cores we hope to better understand what caused these events, study the biogeochemical and ecological feedbacks that operated during them, and reveal precisely how they impacted continental environments. The Bighorn Basin preserves the most expanded stratigraphic records of the PETM and Elmo yet known, so these cores will provide an opportunity to study hyperthermals at unprecedented resolution.

比格霍恩盆地加芯项目（BBCP）w。克莱德（Clyde），新汉普郡大学（Unigers of New Hampshireabstrict），比格霍恩盆地加油项目将从怀俄明州的大角盆地的三个地点（Polecat Bench，Gilmore Hill，盆地变电站）中的每个地点收集约200米的核心，以更好地限制古生元超高事件的原因和影响。高温是突然的，大型全球变暖事件，与地球周期的极端扰动有关。特别是两个事件将是针对的 - 古新世 - 欧新新世最大值（PETM，ETM1）和ELMO（ETM2）事件。 PETM是最有记录的高温，涉及从不到10千年（KY）中释放2,000-6,800千兆铜（GT）的碳（GT），从而使地球在100-200 ky期间释放5-9ºC。为了进行比较，当今地球上整个化石燃料资源基础估计约为5,000 gt。 Elmo是一个较小的放大器事件，发生在PETM之后，在海洋记录中反转的Chron C24N/C24R极性下方，但在连续截面中仍记录得很差。通过将各种沉积学，地球化学和载谱方法应用于所提出的核心，我们希望更好地理解导致这些事件的原因，研究它们在它们期间运行的生物地球化学和生态反馈，并准确揭示它们如何影响持续环境。大角盆地保留了尚未知道的PETM和Elmo的最扩展的地层记录，因此这些核心将提供一个以前所未有的分辨率研究高温群体的机会。