REU: Geochemical and Petrologic Studies of Lavas from the Eastern Indian Ocean: Implications for Mantle Sources and Processes and Constraints on Plate Motions

这是一个获取东印度洋不同地点不同年龄熔岩的岩石学、常量元素和微量元素丰度以及放射性同位素数据的项目。目的是确定90E山脊的长期地球化学趋势，以了解富集型和亏损地幔成分混合比的变化；评估单个90E火山迁出热点源时的生长和演化；确定异常地幔成分作为年龄函数的作用；确定与Kerguelen热点特征不同的富集组分是否也是东印度洋海底火山活动的原因。对东印度洋火山岩的地球化学特征知之甚少，该项目将提供与西印度洋观测到的同位素异常进行比较所需的基线数据。弗雷博士是一位备受尊敬的岩石学家，毫无疑问，他的实验室有能力产生必要的高质量数据。他过去曾成功地参与过类似规模的项目。

This is a project to obtain petrologic, major and trace element abundances, and radioisotopic data for lavas of varying age from diverse localities in the eastern Indian Ocean. Objectives are to determine the long term geochemical trends along 90E Ridge in order to understand changes in mixing ratios between enriched and depleted mantle components; evaluate growth and evolution of individual 90E volcanoes as they migrated away from hot spot source; determine role of unusual mantle components as function of age; determine if enriched components distinct from a Kerguelen hotspot signature have also contributed to volcanism on the eastern Indian Ocean seafloor. %%% Relatively little is known about the geochemical signature of volcanic rocks from the eastern Indian ocean, and this project will provide baseline data needed for comparison with the observed isotopic anomalies from the western Indian Ocean. Dr. Frey is a well respected petrologist and there is mo doubt that his lab is equipped to generate the high quality data that is necessary. He has worked successfully on projects of a similar scope in the past.