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

夏威夷下方的融化生成和运输：描述零年龄羽流的特征

• 批准号: 9909473
• 负责人: Kenneth Sims
• 金额: $ 12.33万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-01-01 至 2003-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9909473&HistoricalAwards=false
• 关键词: Melt; Generation; Transport; Beneath; Hawaii

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.

夏威夷群岛链是地球上最活跃的地幔柱（“热点”）之一的表面表现。 测量的U系列不平衡，主要和微量元素的组成和Nd，Sr同位素比年轻的玄武岩从整个夏威夷岛链将被用来确定熔化条件在夏威夷羽。为此，我们将分析一套岩石，其中包括从夏威夷火山链的前缘延伸到尾端的火山熔岩，并涵盖夏威夷熔岩所展示的大部分地球化学范围。该项目的主要目标是利用这一“零年龄”的时间片沿着岛链、U系列测量和融化的数值模型来描述从羽流核心到边缘的融化动态变化。