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

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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.