Osmium Isotopes in Mid-Ocean Ridge Hydrothermal Systems

大洋中脊热液系统中的锇同位素

• 批准号: 9504276
• 负责人: Gregory Ravizza
• 金额: $ 5.76万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-02-15 至 1998-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9504276&HistoricalAwards=false
• 关键词: Osmium; Isotopes; Mid; Ocean; Ridge

9504276 Ravizza Ravizza plans to collect hydrothermal water and chimney samples for analysis for the platinum group elements, rhenium and osmium isotopes. We have little understanding of the global cycling of these elements and there appears to be more of these metals being inputted by rivers than is being deposited into sediments. The osmium isotope ratio in sea water has changed dramatically in the past 60 million years which some scientists have attributed to an increase in continental weathering. Understanding the sources and sinks of Os will be important for evaluating this process, and hydrothermal vents and deposits may be a major sink for Os. ***

小行星9504276 Ravizza计划收集热液和烟囱样本，用于分析铂族元素、铯和锇同位素。 我们对这些元素的全球循环知之甚少，这些金属中似乎有更多的是通过河流输入的，而不是沉积到沉积物中的。 海水中的锇同位素比率在过去的6000万年里发生了巨大的变化，一些科学家将其归因于大陆风化的增加。了解Os的来源和汇对于评估这一过程很重要，热液喷口和矿床可能是Os的主要汇。