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

合作研究：对火山弧地幔包体中记录的多阶段历史进行结构、岩石学和化学研究

• 批准号: 9401930
• 负责人: Julie Morris
• 金额: $ 5.49万
• 依托单位: Washington University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-02-15 至 1997-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9401930&HistoricalAwards=false
• 关键词: Collaborative; Research; Textural; Petrologic; Chemical

9401930 Morris 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.

9401930 Morris PI 打算研究宿主岩浆与捕虏体相互作用的方式、宏观和微观变形特征、模态丰度、矿物主量和微量元素化学、同位素（Sr、Nd、Pb、O、H 和 Be）分析以及流体和熔体包裹体研究（拉曼）。 所有工作都将在仔细关注结构、矿物学和岩石学证据的背景下进行，这些证据用于区分捕虏体中记录地幔历史不同阶段的部分。 本研究的结核组来自多个地区。 来自菲律宾吕宋岛巴丹岛和堪察加半岛阿瓦钦斯基火山的捕虏体将成为详细同位素和微量元素工作的重点。 从 Kharchinsky、Shiveluch、Valovayam（堪察加弧）和 Chirinkotan（千岛弧）回收的捕虏体将接受初步化学研究，为以后更详细的工作（如果这些研究有必要）奠定坚实的基础。 PI希望解决有关交代作用之前的地幔成分、弧火山岩高场强元素异常特征的起源、交代剂的性质以及交代事件的年龄等问题。