Collaborative Research: Rare Gases in Samoan Xenoliths

本项目将继续研究 萨摩亚热点链。 以前的工作已经证明非常高 捕虏体中的稀有气体浓度，以及至少一些 他们有很高的3 He/4 He比值（22 RA）和非- 大气重稀有气体 继续研究来自 整个萨摩亚将提供一个重要的考验， 根据对仅来自两个国家的捕虏体的分析得出的结论 地点。 此外，单个晶体将通过 激光聚变表征小尺度惰性气体不均匀性 在捕虏体中 为了更充分地理解 在稀有气体的研究结果中， 流体包裹体的组成和充填压力 稀有气体的种类

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.