Light stable isotopic compositions of enriched mantle sources: Resolving the dehydration paradox

Dixon, Jacqueline E
Bindeman, Ilya N
Kingsley, Richard H
Simons, Kyla K
le Roux, Petrus J
Hajewski, Christina R
Swart, Peter; ORCID: 0000-0002-6743-6162
Langmuir, Charles H
Ryan, Jeffrey G
Walowski, Kristina J
Wada, Ikuko
Wallace, Paul J
Volatile compositions of enriched mid-ocean ridge basalt are presented, including water concentrations (FTIR and TC/EA) and isotopic ratios of hydrogen (Conventional and TC/EA), boron (laser ablation ICP-MS), lithium (MC-ICP-MS) and oxygen (laser fluorination). Of special significance, we performed an interlaboratory comparison between conventional and TC/EA techniques for hydrogen isotopic ratios in basaltic glasses, resulting in revisions to the mica standardization protocol for the TC/EA method. Glasses from the Arctic and South Atlantic were analyzed for deltaD SMOW using stepped-heating manometry/mass spectrometry at the University of Miami Stable Isotope Laboratory. Water contents and hydrogen isotope ratios of glasses from the Azores Platform and EPR 6° to 17°N were measured by continuous flow via the High Temperature Conversion / Elemental Analyzer (TC/EA) technique at the University of Oregon. In situ boron isotopic compositions were measured by laser ablation, multiple-multiplier ICP-MS at the Department of Terrestrial Magnetism, Carnegie Institute of Washington. Lithium concentrations and isotopic compositions were measured by MC-ICP-MS at Lamont-Doherty Earth Observatory using chemistry and column procedures following Tomascak et al. [1999], with minor modifications. Oxygen isotopes from Arctic ridge samples were measured by J. Eiler at the California Institute of Technology as described in Cooper et al. [2004].
How to cite this dataset:
Dixon, J. E., Bindeman, I. N., Kingsley, R. H., Simons, K. K., le Roux, P. J., Hajewski, C. R., Swart, P., Langmuir, C. H., Ryan, J. G., Walowski, K. J., Wada, I., Wallace, P. J., 2017. Light stable isotopic compositions of enriched mantle sources: Resolving the dehydration paradox, Version 1.0. Interdisciplinary Earth Data Alliance (IEDA). Accessed 2021-05-14.
DOI Creation Date:
Light Stable Isotopic Compositions of Enriched Mantle Sources: Resolving the Dehydration Paradox. Geochemistry, Geophysics, Geosystems, 18.
Creative Commons Attribution-NonCommercial-Share Alike 3.0 United States [CC BY-NC-SA 3.0]
Funding source(s):
National Science Foundation: 0351149
National Science Foundation: 9302574
National Science Foundation: 9530373
National Science Foundation: 0351125
National Science Foundation: 0844772
Coverage Scope: Regional (Continents, Oceans)
Geographic Location: Arctic Ridges, Azores Platform, South Atlantic, East Pacific Rise 6-17°N
User Contributed Keyword(s):
volatiles, enriched MORB, stable isotopes, mantle metasomatism
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