Now showing items 1-8 of 8

  • Continental bedrock and riverine fluxes of strontium and neodymium isotopes to the oceans 

    Peucker-Ehrenbrink, Bernhard; Miller, Mark W.; Arsouze, Thomas; Jeandel, Catherine (American Geophysical Union, 2010-03-27)
    Realistic models of past climate and ocean chemistry depend on reconstructions of the Earth's surface environments in the geologic past. Among the critical parameters is the geologic makeup of continental drainage. Here ...
  • An evaluation of staining techniques for marking daily growth in scleractinian corals 

    Holcomb, Michael; Cohen, Anne L.; McCorkle, Daniel C. (2012-12)
    In situ skeletal markers have been widely used to quantify skeletal growth rates of scleractinian corals on sub-annual time-scales. Nevertheless, an evaluation of different techniques, both in terms of their efficacy and ...
  • Extreme magnesium isotope fractionation at outcrop scale records the mechanism and rate at which reaction fronts advance 

    Pogge von Strandmann, Philip A. E.; Dohmen, Ralf; Marschall, Horst R.; Schumacher, John C.; Elliott, Tim (2014-10)
    Isotopic fractionation of cationic species during diffusive transport provides novel means of constraining the style and timing of metamorphic transformations. Here we document a major (~1‰) decrease in the Mg isotopic ...
  • Geochemical stages at Jasper Seamount and the origin of intraplate volcanoes 

    Konter, Jasper G.; Staudigel, Hubert; Blichert-Toft, Janne; Hanan, B. B.; Polve, M.; Davies, G. R.; Shimizu, Nobumichi; Schiffman, P. (American Geophysical Union, 2009-02-03)
    Ocean intraplate volcanoes (OIVs) are formed in a sequence of stages, from large to small, that involve a systematic progression in mantle melting in terms of volumes and melt fractions with concomitant distinct mantle ...
  • Glacial influence on the geochemistry of riverine iron fluxes to the Gulf of Alaska and effects of deglaciation 

    Schroth, Andrew W.; Crusius, John; Chever, Fanny; Bostick, Benjamin C.; Rouxel, Olivier J. (American Geophysical Union, 2011-08-25)
    Riverine iron (Fe) derived from glacial weathering is a critical micronutrient source to ecosystems of the Gulf of Alaska (GoA). Here we demonstrate that the source and chemical nature of riverine Fe input to the GoA could ...
  • In situ δ7Li, Li/Ca, and Mg/Ca analyses of synthetic aragonites 

    Gabitov, R. I.; Schmitt, A. K.; Rosner, Martin; McKeegan, K. D.; Gaetani, Glenn A.; Cohen, Anne L.; Watson, E. B.; Harrison, T. M. (American Geophysical Union, 2011-03-01)
    In situ secondary ion mass spectrometry (SIMS) analyses of δ7Li, Li/Ca, and Mg/Ca were performed on five synthetic aragonite samples precipitated from seawater at 25°C at different rates. The compositions of δ7Li in bulk ...
  • A new automated method for measuring noble gases and their isotopic ratios in water samples 

    Stanley, Rachel H. R.; Baschek, Burkard; Lott, Dempsey E.; Jenkins, William J. (American Geophysical Union, 2009-05-29)
    A method is presented for precisely measuring all five noble gases and their isotopic ratios in water samples using multiple programmed multistage cryogenic traps in conjunction with quadrupole mass spectrometry and magnetic ...
  • Temperature calibration of Mg/Ca ratios in the intermediate water benthic foraminifer Hyalinea balthica 

    Rosenthal, Yair; Morley, Audrey; Barras, Christine; Katz, Miriam E.; Jorissen, Frans; Reichart, Gert-Jan; Oppo, Delia W.; Linsley, Braddock K. (American Geophysical Union and the Geochemical Society, 2011-04-01)
    Core top samples from Indonesian and northeast Atlantic depth transects were used to calibrate Mg/Ca and δ18O in tests of the calcitic benthic foraminifer Hyalinea balthica to bottom water temperature between 4°C and 13°C. ...