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

氦、氖、氩、二氧化碳和氮气：大陆和热点火山活动的同位素系统学

• 批准号: 8816954
• 负责人: Harmon Craig
• 金额: $ 16.57万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-12-15 至 1990-12-14
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8816954&HistoricalAwards=false
• 关键词: Helium; Neon; Argon; CO2; N2

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.

这一奖项将支持计划中的一种新的高精度质谱仪的研究，该质谱仪致力于分析地幔材料中的Ne和N同位素。将在以下问题上开展工作：1)Ne数据显示的直线图与He比率的关系是否正确？2)除了已经确定的少数似乎存在羽流和MORB物质的混合物外，是否有类似的He和Ne同位素关联？3)可以观察到的NE20效应的实际强度？4)捕虏体是如何形成的，钻石和玄武岩获得了它们特有的Ne特征？还将开展各种其他工作，包括对夏威夷火山链、卡罗琳和马克萨斯热点、社会和南方群岛、甘比埃群岛、皮特凯恩、萨摩亚和印度尼西亚弧的样品进行分析。最后，将继续在海洋岛屿开展关于Ar40/Ar36比率的工作。