A Stratigraphic and Geochemical Transect Across Northern South America for Assessment of Paleoceanographic Events in the Caribbean Gateway During the Middle Cretaceous

横跨南美洲北部的地层和地球化学横断面，用于评估中白垩世加勒比海门户的古海洋事件

• 批准号: 9304659
• 负责人: Lisa Pratt
• 金额: $ 17.38万
• 依托单位: Indiana University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-08-15 至 1996-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9304659&HistoricalAwards=false
• 关键词: Stratigraphic; Geochemical; Transect; Across; Northern

9304659 Pratt PIs will develop a high-resolution stratigraphic and geochemical framework for the Lower and middle Cretaceous in northern South America, with focus on the Cenomanian-Turonian boundary interval. These data are needed to establish a regional picture of sea level change, primary marine production, and biologic evolution in the Caribbean gateway between the Pacific and the developing Atlantic oceans. Isotopic and geochemical data will be used to calculate the total quantity of marine organic carbon preserved on this margin, making it possible to assess the degree to which the equatorial region influenced global concentrations of carbon dioxide and oxygen in the Cretaceous atmosphere.

9304659普拉特PI将建立南美洲北部下白垩统和中白垩统的高分辨率地层和地球化学格架，重点放在塞诺马尼亚-图罗尼亚界线段。需要这些数据来确定太平洋和发展中大西洋之间的加勒比海门户的海平面变化、初级海洋生产和生物演变的区域图景。将使用同位素和地球化学数据来计算这一边缘保存的海洋有机碳总量，从而有可能评估赤道地区对白垩纪大气中二氧化碳和氧气全球浓度的影响程度。