Isotope evidence of a mantle convection boundary at the Australian-Antarctic Discordance
Abstract
Basalts from the Southeast Indian Ridge south of Australia form two geographically and isotopically distinct groups that show affinities with either Indian Ocean or Pacific/Atlantic Ocean isotope compositions. The data raise the possibility that there is a sharp boundary between the Indian and Pacific Ocean isotope provinces. The isotope boundary occurs over less than 200km within the Australian-Antarctic Discordance, a technically complex region believed to overlie a zone of downwelling mantle flow. © 1988 Nature Publishing Group.
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Scholars@Duke
Emily M. Klein
Dr. Klein's research focuses on the geochemistry of oceanic basalts, using diverse tools of major, trace and isotopic analyses. Her research involves sea-going expeditions to sample and map the ocean floor.
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