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.

本文对黑海现代沉积物和美国宾夕法尼亚州部分页岩中的氧-缺氧转变进行了比较研究。采集了黑海岩心样品和宾夕法尼亚州岩石样品，这些样品来自氧、过渡和缺氧环境。该组将负责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、无机磷和有机磷的化学分析。化学分析将与沉积结构(生物扰动、层状等)的测定密切结合。通过X射线平板技术。这一结果将被用来检验现有的理论，并开发新的范例：(1)正常海相与正辛质沉积物的区分；(2)同生黄铁矿与成岩黄铁矿的区分；(3)氧/缺氧过渡带内磷(和锰)富集的形成。