Experimental Determination Of The Influence Of Melt Structure On Trace Element Partitioning During Peridotite Melting Beneath Mid-Ocean Ridges

大洋中脊下橄榄岩熔融过程中熔体结构对微量元素分配影响的实验测定

• 批准号: 0118198
• 负责人: Glenn Gaetani
• 金额: $ 22.73万
• 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: 2001-09-15 至 2006-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0118198&HistoricalAwards=false
• 关键词: Experimental; Determination; Influence; Melt; Structure

The PI proposes to conduct experiments on the melting of peridotite in order to quantitatively determine the effect of melt structure on trace element partitioning at the peridotite, solidus at pressures of 1.5 to 3.0 Gpa. The experiments will test the hypothesis that isobaric differences in trace element partitioning can be related to differences in the extent of polymerization of the melt-to be evaluated with new measurements of viscosity. The experiments will be carried out on appropriate bulk compositions doped with a few ppm of the elements of interest (a range of REE, LIL, and I-IFSE), with analyses of partitioning to be done with the ion microprobe on cpx, opx, and garnet and glass in quenched experimental charges. The results will have numerous applications to melting in the earth's mantle.

PI建议对橄榄岩的熔融进行实验，以定量确定熔体结构对橄榄岩中微量元素分配的影响，固相线在1.5至3.0 Gpa的压力下。实验将测试的假设，微量元素分区的等压差异可以与熔体聚合的程度的差异，以评估与新的测量粘度。实验将进行适当的散装组合物掺杂的几个ppm的元素的利益（一系列的稀土元素，LIL，和I-IFSE），与分区的分析要做的离子微探针cpx，opx，石榴石和玻璃淬火实验收费。这些结果将在地幔熔化方面有许多应用。