The Euxinic Basin Oxic/Anoxic Transition in Modern and Ancient Sediments

现代和古代沉积物中的增氧盆地有氧/缺氧转变

• 批准号: 8822977
• 负责人: Robert Berner
• 金额: $ 17.51万
• 依托单位: Yale University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-04-15 至 1991-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8822977&HistoricalAwards=false
• 关键词: Euxinic; Basin; Oxic; Anoxic; Transition

This is a comperative study of the oxic-anoxic transition in modern sediments of the Black Sea and of some Pennsylvania shales in the U.S. The Black Sea core samples and the Pennsylvania rock samples from oxic, transitional, and anoxic environments have been collected. The PI will undertake sulfur isotopic analysis of pyrite and chemical analyses for pyrite sulfur, organic carbon, reactive and total iron, and inorganic and organic phosphorus. The chemical analyses will be closely integrated with determinations of sedimentary texture (bioturbated, laminated, etc.) via X-ray slab techniques. The result will be used to test current theories and develop new paradigme for: (1) the discriminaation of normal marine from euxinic sediments; (2) the discrimination of syngenetic from diagenetic pyrite; (3) the formation of phosphorus (and manganese) enrichments within oxic/anoxic transition zones.

这是对黑海和美国宾夕法尼亚州一些页岩现代沉积物中含氧缺氧转变的比较研究。收集了来自含氧、过渡和缺氧环境的黑海岩心样品和宾夕法尼亚岩石样品。 PI 将进行黄铁矿的硫同位素分析以及黄铁矿硫、有机碳、活性铁和总铁以及无机和有机磷的化学分析。 化学分析将与通过 X 射线平板技术确定沉积结构（生物扰动、层状等）紧密结合。 研究结果将用于测试当前的理论并开发新的范式：（1）区分正常海洋和常生沉积物； (2) 同生与成岩黄铁矿的区分； (3) 在好氧/缺氧过渡区内形成磷（和锰）富集。