GEOTRACES IC1 (BATS) contamination-prone trace element isotopes Cd, Fe, Pb, Zn, Cu, and Mo intercalibration
- Creators
- Boyle, Edward A.
- John, Seth
- Abouchami, Wafa
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Adkins, Jess F.
- Echegoyen-Sanz, Yolanda
- Ellwood, Michael
- Flegal, A. Russell
- Fornace, Kyrstin
- Gallon, Steve
- Galer, Steve
- Gault-Ringold, Melanie
- Lacan, Francois
- Radic, Amandine
- Rehkamper, Mark
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Rouxel, Olivier
- Sohrin, Yoshiki
- Stirling, Claudine
- Thompson, Claire
- Vance, Derek
- Xue, Zichen
- Zhao, Ye
Abstract
We report data on the isotopic composition of cadmium, copper, iron, lead, zinc, and molybdenum at the GEOTRACES IC1 BATS Atlantic intercalibration station. In general, the between lab and within-lab precisions are adequate to resolve global gradients and vertical gradients at this station for Cd, Fe, Pb, and Zn. Cd and Zn isotopes show clear variations in the upper water column and more subtle variations in the deep water; these variations are attributable, in part, to progressive mass fractionation of isotopes by Rayleigh distillation from biogenic uptake and/or adsorption. Fe isotope variability is attributed to heavier crustal dust and hydrothermal sources and light Fe from reducing sediments. Pb isotope variability results from temporal changes in anthropogenic source isotopic compositions and the relative contributions of U.S. and European Pb sources. Cu and Mo isotope variability is more subtle and close to analytical precision. Although the present situation is adequate for proceeding with GEOTRACES, it should be possible to improve the within-lab and between-lab precisions for some of these properties.
Additional Information
© 2012 by the American Society of Limnology and Oceanography, Inc. Submitted 1 August 2011 Revised 19 April 2012 Accepted 29 May 2012. We particularly thank Greg Cutter and Geoff Smith for assistance in obtaining these samples, as well as the other participants who lent a hand in lugging heavy samples up and down the decks of the ship. Rick Kayser prepared materials for the cruise. We thank Nilanjan Chatterjee for electron probe analysis. We thank the officers and crew of the R/V Knorr. The National Science Foundation sponsored the cruise and many of the shipboard participants; in particular E.B. was funded to participate on the cruise by NSF Grant OCE-0751409 and his preparation of this paper was partially supported by grants from the Kuwait Foundation for the Advancement of Science (KFAS) and the Singapore-MIT Alliance for Research and Technology (SMART). This paper is part of the Intercalibration in Chemical Oceanography special issue of L&O Methods that was supported by funding from the U.S. National Science Foundation, Chemical Oceanography Program (Grant OCE-0927285 to G. Cutter).Additional details
- Eprint ID
- 35650
- Resolver ID
- CaltechAUTHORS:20121127-073916860
- OCE-0751409
- NSF
- Kuwait Foundation for the Advancement of Science (KFAS)
- Singapore-MIT Alliance for Research and Technology (SMART)
- OCE-0927285
- NSF
- Created
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2012-11-27Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field
- Caltech groups
- Division of Geological and Planetary Sciences