Helium, Neon, Argon, CO2, and N2: Isotopic Systematics in Continental and Hotspot Volcanism

该奖项将支持一种新的高精度质谱仪的研究计划，该质谱仪专门用于分析地幔物质中的Ne和N同位素。工作将围绕以下问题展开：1)Ne数据显示的He比率的直线图是否正确？2)除了已经确定的少数氦和氖同位素相关性之外，是否存在类似的He和Ne同位素相关性，其中似乎存在羽流和MORB物质的混合物？3)可以观测到的Ne20效应的实际大小是多少？4)捕虏体、金刚石和玄武岩的Ne特征是如何获得的？还将进行各种额外的工作，包括分析来自夏威夷火山链、卡罗琳和马克萨斯热点、社会和南方群岛、甘比尔群岛、皮特凯恩群岛、萨摩亚和印度尼西亚岛弧的He样本。最后，将继续研究海洋岛屿的Ar40/Ar36比率。

This award will support research planned for a new high precision mass spectrometer dedicated to analyses of Ne and N isotopes in mantle materials. Work will be carried out on the following questions: 1) Are Ne data showing straight-line plots against He ratios correct? 2) Are there similar He and Ne isotopic correlations beside the few already identified, where there appear to be mixtures of plume and MORB material? 3) What is the actual magnitude of Ne20 effects which can be observed? 4) How do xenoliths, diamonds and basalts acquire their characteristic Ne signatures? A variety of additional work will also be carried on, including analyses of He samples from the Hawaiian Volcano chain, Caroline and Marquesas hotspots, Society and Austral Islands, Gambier Islands, Pitcairn, Samoa, and the Indonesian Arc. Finally, work will continue on Ar40/Ar36 ratios in oceanic islands.