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Collaborative Research: Rare Gases in Samoan Xenoliths

Collaborative Research: Rare Gases in Samoan Xenoliths
合作研究：萨摩亚捕虏体中的稀有气体
批准号：
9204822
负责人：
Wallace Broecker
金额：
$5.25万
依托单位：
Columbia University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1992
资助国家：
美国
项目状态：
已结题
起止时间：
1992-07-01 至 1994-06-30
来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9204822&HistoricalAwards=false
关键词：
CollaborativeResearchRareGasesSamoan

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英文摘要
This project is to continue study of ultramafic xenoliths from the Samoan hotspot chain. Previous work has demonstrated very high noble gas concentrations in the xenoliths, and at least some of them have highly elevated 3He/4He ratios (to 22 RA) and non- atmospheric heavy rare gases. Continued studies of xenoliths from throughout Samoa will provide an important test of the tentative conclusions reached, based on analyses of xenoliths from just two localities. In addition, individual crystals will be analyzed by laser fusion to characterize small-scale noble gas heterogeneity within the xenoliths. To more fully understand the significance of the rare gas results the PIs plan to study the gross chemical composition and the filling pressures of the fluid inclusions in which rare gases reside.
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