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GEOTRACES IC1 (BATS) contamination‐prone trace element isotopes Cd, Fe, Pb, Zn, Cu, and Mo intercalibration
Author(s) -
Boyle Edward A.,
John Seth,
Abouchami Wafa,
Adkins Jess F.,
EchegoyenSanz Yolanda,
Ellwood Michael,
Flegal A. Russell,
Fornace Kyrstin,
Gallon Celine,
Galer Steve,
GaultRingold Melanie,
Lacan Francois,
Radic Amandine,
Rehkamper Mark,
Rouxel Olivier,
Sohrin Yoshiki,
Stirling Claudine,
Thompson Claire,
Vance Derek,
Xue Zichen,
Zhao Ye
Publication year - 2012
Publication title -
limnology and oceanography: methods
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.898
H-Index - 72
ISSN - 1541-5856
DOI - 10.4319/lom.2012.10.653
Subject(s) - geotraces , isotope , environmental chemistry , isotope fractionation , trace element , cadmium , chemistry , fractionation , zinc , equilibrium fractionation , isotopes of zinc , environmental science , water column , geology , oceanography , seawater , geochemistry , physics , organic chemistry , quantum mechanics
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.