Deconvolving the Galapagos Plume

国际和平研究所将对加拉帕戈斯群岛的现有样品和加拉帕戈斯群岛的疏浚样品进行地球化学研究，以找出显然对那里的地幔熔融有贡献的各种地幔成分。他将主要分析橄榄石和尖晶石赋存的熔体包裹体，根据证据表明，此类包裹体通常包含更多样化的熔体，受混合的影响较小，而不是大量熔岩。他将分析常量元素、微量元素、挥发性丰度、铅同位素和氧同位素，以确定各种地幔端元的性质，并提供这些端元实际是什么的约束(俯冲沉积物？回收的海洋辉长岩？回收蚀变玄武岩等)。这项研究将主要使用WHOI、DTM和加州理工大学的仪器进行。

The PI will conduct a geochemical study of existing samples from the Galapagos Islands and dredged samples for the Galapagos archipelago in order to sort out the various mantle components that apparently contribute to mantle melts there. He will primarily analyze olivine and spinel-hosted melt inclusions, based on evidence that such inclusions generally contain more diverse melts and are less affected by mixing than bulk lavas. He will analyze major elements, trace elements, volatile abundances, Pb isotopes and Oxygen isotopes in order to determine the nature of various mantle endmembers, and to provide constraints on what these endmembers actually are (subducted sediment? recycled oceanic gabbro? Recycled altered basalt, etc..). The study will mostly be conducted using instruments at WHOI, DTM, and Caltech.