Melt Generation and Transport Beneath Hawaii: Characterizing the Zero Age Plume

夏威夷群岛是地球上最活跃的地幔柱（“热点”）之一的地表表现。对来自夏威夷岛链的年轻玄武岩的u系列不平衡、主要和微量元素组成以及Nd和Sr同位素比值的测量将用于确定夏威夷羽流的融化条件。为此，我们将分析一组岩石，其中包括从夏威夷链的前缘延伸到尾端的火山熔岩，覆盖了夏威夷熔岩所展示的大部分地球化学范围。该项目的主要目标将是利用沿着岛链的“零年龄”时间片、u系列测量和融化的数值模型来表征从羽流核心到边缘的融化动力学变化。

SimsEAR-9909473The chain of Hawaiian Islands is the surface expression of one of the most active mantle plumes ('hot spots') on Earth. Measurements of U-series disequilibria, major and trace element compositions and Nd, and Sr isotopic ratios in young basalts from across the Hawaiian Island chain will be used to determine melting conditions in the Hawaiian plume. For that purpose, we will analyze a suite of rocks that include lavas from volcanoes that extend from the leading edge to the trailing end of the Hawaiian chain and cover most of the geochemical range exhibited by Hawaiian lavas. The main objective of this project will be to use this "zero age" time slice along the island chain, the U-series measurements, and numerical models of melting to characterize the change in melting dynamics from the core of the plume to its fringes.