The Geochemistry of Mauna Loan Volcanism and Its ConjecturalRole in Kilauean Volcanism

该项目将继续对夏威夷岛上的莫纳Loan火山熔岩进行详细的地球化学和岩石学研究。以前的工作已经为莫纳罗亚火山的岩浆系统建立了一个全面的模型，表明它与邻近的基拉韦厄火山明显不同。本项目将以这项工作为基础，测试这些想法，并通过研究具体问题进一步发展它们。这将包括：a)详细的地球化学和矿物学研究的苦质熔岩和广泛的1859年的流动，因为它被认为可以包含有关母岩浆的性质提供火山的信息；B：研究熔岩组成的长期变化，强调微量元素和同位素化学，以评估过去3万年中熔岩来源组成的可能变化；C)为所有重大历史喷发提供详细的玻璃和矿物化学，并将其与现有的地球化学数据相结合，以测试和完善岩浆模型；10 .通过对地层控制的史前基拉韦厄熔岩的地球化学分析，跟踪最近的一项发现，该发现表明，与以前的地球化学证据相反，莫纳罗亚和基拉韦厄可能是岩浆相互关联的。

This project will continue detailed geochemical and petrological studies of Mauna Loan lavas on the island of Hawaii. Previous work has produced a comprehensive model for Mauna Loa's magmatic system, showing that it is markedly different from that of neighboring Kilauea volcano. This project will build on that work, testing these ideas and developing them further through study of specific problems. These will include: a) detailed geochemical and mineralogical studies of picritic lavas and the extensive 1859 flow because it is thought these could contain information on the nature of the parental magmas that supply the volcano; b: study the long-term secular variation in lava composition, emphasizing trace element and isotopic chemistry in order to evaluate possible changes in source composition ov the last 30,000 years; c) provide detailed glass and mineral chemistry for all major historic eruptions, integrating this with exisiting geochemical data in order to test and refine the magmatic model; d0 through geochemical analysis of stratigraphically controlled prehistoric Kilauean lavas, follow up on a recent discovery which suggests that, previous geochemical evidence to the contrary, Mauna Loa and Kilauea may be magmatically interrelated.