Orbital Forcing of Continental Eocene Climate: The Green River Formation of Wyoming

大陆始新世气候的轨道强迫：怀俄明州的绿河地层

• 批准号: 0082402
• 负责人: Paul Olsen
• 金额: $ 3.51万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-12-15 至 2003-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0082402&HistoricalAwards=false
• 关键词: Orbital; Forcing; Continental; Eocene; Climate

This award is for the development and quantitative analysis of a detailed physical cyclostratigraphy of the early to middle Eocene Green River Formation of the greater Green River Basin of Wyoming based on extensive cores and outcrops. The study will use three suites of proxies for lake depth and hence climate: sedimentary facies (depth ranks), available shale oil yield data on cores, and geophysical logs. External time constraints will be based on varve calibration and single crystal 40 Ar/39 Ar dating of tuffs within the formation. Age models will be developed from these constraints as well as quantitative frequency analysis of the data. Thus, the study will be able to produce an orbitally tuned cyclostratigraphy for much of the early and middle Eocene, with a resolution of less than 20,000 years, registered to the existing detailed lithostratigraphy, biostratigraphy, and paleomagnetic polarity stratigraphy.

该奖项旨在根据广泛的岩心和露头，对怀俄明州大绿色河盆地早至中始新世绿色河组进行详细的物理旋回地层学开发和定量分析。 这项研究将使用三套代表湖泊深度和气候的指标：沉积相（深度等级）、岩心上的可用页岩油产量数据和地球物理测井。 外部时间限制将基于地层内凝灰岩的纹管校准和单晶40 Ar/39 Ar定年。 将根据这些限制因素以及数据的定量频率分析来建立年龄模型。 因此，这项研究将能够产生一个轨道调谐的旋回地层学的早期和中期始新世，分辨率小于20,000年，注册到现有的详细的岩石地层，生物地层和古地磁极性地层。