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GEOTRACES IC1 (BATS) contamination-prone trace element isotopes Cd, Fe, Pb, Zn, Cu, and Mo intercalibration
journal contribution
posted on 2023-05-19, 17:06 authored by Boyle, EA, John, S, Abouchami, W, Adkins, JF, Echegoyen-Sanz, Y, Ellwood, M, Flegal, AR, Fornace, K, Gallon, C, Galer, S, Melanie EastMelanie East, Lacan, F, Radic, A, Rehkamper, M, Rouxel, O, Sohrin, Y, Stirling, C, Thompson, C, Vance, D, Xue, Z, Zhao, YWe 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.
History
Publication title
Limnology and OceanographyVolume
10Issue
9Pagination
653-665ISSN
0024-3590Department/School
Institute for Marine and Antarctic StudiesPublisher
Amer Soc Limnology OceanographyPlace of publication
5400 Bosque Blvd, Ste 680, Waco, USA, Tx, 76710-4446Rights statement
Copyright 2012 American Society of Limnology and Oceanography, Inc.Repository Status
- Restricted