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

PI建议对橄榄岩的熔融进行实验，以定量确定熔体结构对在1.5~3.0 Gpa压力下的橄榄岩固相线上微量元素分配的影响。这些实验将检验这样一个假设，即微量元素分配的等压差异可能与熔体聚合程度的差异有关-将通过新的粘度测量进行评估。实验将在适当的块状成分上进行，掺杂几ppm的感兴趣元素(REE、LIL和I-IFSE的范围)，并用离子探针对淬火实验电荷中的CPX、OPX、石榴石和玻璃进行分配分析。这一结果将在地幔融化方面有许多应用。

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.