Deconvolving the Galapagos Plume

PI将对来自加拉帕戈斯群岛的现有样本进行地球化学研究，并为加拉帕戈斯群岛疏浚样本，以便整理出明显导致那里地幔融化的各种地幔成分。他将主要分析橄榄石和尖晶石为主的熔体包裹体，因为有证据表明，这些包裹体通常含有更多种类的熔体，并且比大块熔岩受混合影响更小。他将分析主要元素、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上是什么的约束条件(俯冲沉积物？再生海洋辉长岩？再循环蚀变玄武岩等)。该研究将主要使用WHOI、DTM和加州理工学院的仪器进行。

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.