Publication Date:
2022-05-26
Description:
Author Posting. © Association for the Sciences of Limnology and Oceanography, 2012. This article is posted here by permission of Association for the Sciences of Limnology and Oceanography for personal use, not for redistribution. The definitive version was published in Limnology and Oceanography: Methods 10 (2012): 653-665, doi:10.4319/lom.2012.10.653.
Description:
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.
Description:
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).
Repository Name:
Woods Hole Open Access Server
Type:
Article
Format:
application/pdf
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