Thorium and Protactinium Isotopes as Tracers of Hydrothermal Scavenging: Differences in Scavenging across Multiple Plume Systems Sampled on GEOTRACES Cruises

Anne Leal1, Robert F Anderson1, Martin Q Fleisher2, Christopher T Hayes3, Kazeem Ojuade3, R. Lawrence Edwards4, Juzer Shaikh4, Erin E Black5, Neil Redmond6, Peter Schroedl7, Xianglei Li4 and Phoebe J Lam8, (1)Lamont-Doherty Earth Observatory at Columbia University, Palisades, United States, (2)Lamont-Doherty Earth Observatory, Palisades, United States, (3)University of Southern Mississippi, Stennis Space Center, United States, (4)University of Minnesota, Department of Earth Sciences, Minneapolis, United States, (5)University of Rochester, Department of Earth and Environmental Sciences, Rochester, United States, (6)University of Rhode Island, School of Ocean Science and Engineering, Narragansett, United States, (7)Boston University, Boston, United States, (8)University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, United States