A Strontium, Oxygen and Carbon Isotopic Study of Cenozoic Marine Biogenic Carbonate from Antarctica

南极新生代海洋生物碳酸盐的锶、氧和碳同位素研究

• 批准号: 8816833
• 负责人: Enriqueta Barrera
• 金额: $ 4.57万
• 依托单位: Ohio State University Research Foundation -DO NOT USE
• 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: 1989-06-15 至 1990-08-21
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8816833&HistoricalAwards=false
• 关键词: Strontium; Oxygen; Carbon; Isotopic; Study

This study will demonstrate the usefulness of strontium, carbon, and oxygen isotopic ratios of biogenic carbonate for dating sediments from glaciomarine environments and interpreting paleoclimatic conditions in Antarctic continental shelves. The award will support an isotopic (strontium, oxygen and carbon) study of foraminifera and bivalves from sediments of Oligocene to Recent age recovered from several drillholes and outcrops on Antarctica. Age estimates based on Sr isotope analyses will provide useful information about sedimentary and glacial processes in Antarctica, as well as permit correlation of glaciomarine sequences and assist in their correlation to lower latitude sedimentary successions. It is the goal of this study to provide direct information about the Cenozoic climate of Antarctic marginal seas, which is presently lacking. Paleoceanography will be inferred from oxygen and carbon isotope ratios. Isotopic data from Antarctic bivalves and foraminifera will be compared with published records for Cenozoic surface and deep waters at low and high latitudes. This will clarify the sources of bottom water formation in the world in the world ocean and the relation between high and low latitude climates.

这项研究将证明锶，碳， 生物碳酸盐的氧同位素比值， 冰川海洋环境和解释古气候条件 南极大陆架。 该奖项将支持一个同位素 （锶、氧和碳）研究 从几个钻孔中回收的渐新世至近代的沉积物 以及南极洲的露头 基于Sr同位素分析的年龄估算 将提供有关沉积和冰川过程的有用信息 在南极洲，以及允许冰海序列的相关性 并协助它们与低纬度沉积物的相关性， 继承。 本研究的目的是提供直接的 关于南极边缘海新生代气候的信息， 这是目前所缺乏的。 古海洋学将从 氧和碳同位素比。 南极的同位素数据 双壳类和有孔虫将与已发表的记录进行比较， 低纬度和高纬度新生代表层和深层沃茨。 这将 阐明了世界上底层水形成的来源 海洋和高、低纬度气候之间的关系。