Collaborative Research: Partitioning of Water Between Mantle Minerals and Silicate Melts

根据该合同，pi将对常见上地幔矿物（橄榄石、辉石、石榴石）和含水硅酸盐熔体之间的水分配进行系统研究。橄榄岩熔融实验将在一系列压力、温度和总水含量的条件下进行，这些条件被认为跨越了地球上地幔部分熔融的条件。这些实验将使用离子探针测量氢和氘的分配系数，并将在同一实验中与主元素和选择的微量元素（Li, be， B， LILE， HFSE， REE）一起测量。本研究将提供关于水在矿物和熔体之间分配随上地幔深度变化的详细数据，并将直接比较水在矿物/熔体之间的分配与上地幔矿物中亲石微量元素的分配。

Under this award, the PIs will conduct a systematic study of the partitioning of water between common upper mantle minerals (olivine, pyroxenes, garnet) and hydrous silicate melt. Peridotite melting experiments will be conducted over a range of pressure, temperature and total H2O content thought to span the conditions of partial melting in the Earth's upper mantle. Partition coefficients for hydrogen and deuterium will be measured in these experiments using the ion microprobe, and will be measured together with major elements and select trace elements (Li, Be, B, LILE, HFSE, REE) in the same experiments. This study will provide detailed data on the variability of the partitioning of water between minerals and melt as a function of depth within the upper mantle, and will directly compare the mineral/melt partitioning of water with that of lithophile trace elements in upper mantle minerals.