Collaborative Research: A Textural, Petrological, and Chemical Investigation of Multi-stage Histories Recorded in Mantle Xenoliths from Volcanic Arcs

9304105 PIS旨在研究寄主岩浆与包体相互作用的方式、宏观和微观变形特征、模式丰度、矿物主量元素和微量元素化学、同位素(锶、钕、铅、氧、氢和铍)分析以及流体和熔体包裹体研究(拉曼)。所有工作将在仔细注意用于区分记录地幔历史不同阶段的包体部分的结构、矿物学和岩石学证据的背景下进行。本研究的结核组合来自多个地区。来自菲律宾吕宋岛巴丹岛和堪察加弧阿瓦钦斯基火山的包体将是详细的同位素和微量元素工作的重点。从Kharchinsky、Shiveluch、Valovayam(堪察加弧)和Chirinkotan(Kuriles弧)发现的包体将进行初步化学研究，以便为以后的更详细工作奠定坚实的基础，如果有必要进行此类研究的话。PIS希望解决交代前地幔的组成、弧状火山岩特征的高场强元素异常的来源、交代剂的性质以及交代事件的年龄等问题。

9304105 Defant The PIs intend to study the way the host magmas interacted with the xenoliths, the macro and micro deformation features, modal abundances, mineral major and trace element chemistries, isotopic (Sr, Nd, Pb, O, H, and Be) analyses, and fluid and melt inclusion studies (Raman). All work will be carried out in the context of careful attention to textural, mineralogical, and petrological evidence used to distinguish those parts of the xenoliths that record different stages in mantle history. Suites of nodules for this study are from several localities. Xenoliths from Batan Island, Luzon arc, Philippines, and Avachinsky Volcano, Kamchatka arc will be the focus of detailed isotopic and trace element work. Xenoliths recovered from Kharchinsky, Shiveluch, Valovayam (Kamchatka arc), and Chirinkotan (Kuriles arc) will be subjected to preliminary chemical studies to form a solid base for more detailed work later, should such studies be warranted. The PIs hope to address questions concerning the composition of the mantle prior to metasomatism, the origin of high-field strength element anomalies characteristic of arc volcanics, the nature of the metasomatizing agent, and the age of the metasomatic event.