The Os Isotope Systematics of MORB Mantle
The Os Isotope Systematics of MORB Mantle
批准号:
0096634
负责人:
Stanley Hart
金额:
$10.0万
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
项目状态:
已结题
起止时间:
2001-06-01 至 2002-05-31
中文摘要
深海橄榄岩的187Os/188Os从接近原始亏损地幔的值到更高和更低的值都有很大的变化。较高的值可能是深海橄榄岩与海水相互作用的结果。这项建议是一项为期一年的初步研究,以探索AP中的铬铁矿颗粒可用于提取不受海水影响的187Os/188Os实际值的可能性。文中给出了初步数据。在第二阶段,PI将分析正常和受羽流影响的深海橄榄岩套中的铬铁矿。
英文摘要
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.
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Geochemical Evolution Of The Mantle
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国内基金
海外基金
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