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.

深海橄榄岩的~（187）Os/~（188）Os值变化范围很大，有的接近原始亏损地幔，有的偏高，有的偏低。较高的值可以解释为深海橄榄岩与海水的相互作用。本建议是一项为期一年的试点研究，以探索可能性，铬铁矿颗粒在AP可用于提取真实的值的187 Os/188 Os不受海水影响。提供了初步数据。在第二阶段，专业人员将分析正常和受地幔柱影响的深海橄榄岩套中的铬铁矿。