The Os Isotope Systematics of MORB Mantle

MORB地幔骨同位素系统学

• 批准号: 0096634
• 负责人: Stanley Hart
• 金额: $ 10万
• 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: 2001
• 资助国家: 美国
• 起止时间: 2001-06-01 至 2002-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0096634&HistoricalAwards=false
• 关键词: Os; Isotope; Systematics; MORB; Mantle

The 187Os/188Os of abyssal peridotites show a wide range from values near those expected for primitive depleted mantle, to higher and lower values. The higher values may be explained by interaction of abyssal peridotites with sea water. This proposal is for a 1-yr pilot study to explore the possibility that chromite grains in the AP may be used to extract real values of 187Os/188Os unaffected by seawater. Preliminary data are presented. In stage 2, the PIs will analyze chromites from suites of normal and plume-affected abyssal peridotites.

187OS/188OS的深渊橄榄岩的范围从原始耗尽的地幔期望的值附近的值到较高和较低的值。较高的值可以通过深渊橄榄岩与海水的相互作用来解释。该提议是针对1年的初步研究，以探讨AP中的铬铁矿晶粒可用于提取不受海水影响的187OS/188OS的实际值。提出了初步数据。在第2阶段，PIS将分析正常和受羽状深渊橄榄岩套件的铬铁矿。