Layering of the Oceanic Lithosphere: Petrologic Study of Hawaiian Xenoliths and Abyssal Peridotites

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9520409 Sen This project will involve petrographic, electron probe, and ion probe work an a suite of spinal Iherzolite and plagioclase Iherzolite xenoliths from the Pali vent on Oahu, Hawaii. These rocks represent a wider depth range of the lithosphere that lost its mid-ocean ridge basalt melts some 90 million years ago. Thus a 90 million year old residual melting column will be reconstructed. The goals of this research are to (a) decipher vertical elemental variations in the oceanic lighosphere beneath Oahu, (b) compare this information with those obtained from abyssal peridotites, (c) test existing melting models of lithosphere information and (d) obtain new insights on mid-ocean ridge basalt melting. ***