GEOTRACES IC1 (BATS) contamination-prone trace element isotopes Cd, Fe, Pb, Zn, Cu, and Mo intercalibration
GEOTRACES IC1 (BATS) contamination-prone trace element isotopes Cd, Fe, Pb, Zn, Cu, and Mo intercalibration
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DOI：
10.4319/lom.2012.10.653
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发表时间：
2012-09-01
影响因子：
2.7
通讯作者：
Zhao, Ye
中科院分区：
文献类型：
--
作者：
Boyle, Edward A.;John, Seth;Zhao, Ye
我们报告的镉，铜，铁，铅，锌和钼的同位素组成的数据在GEOTRACES IC 1 BATS大西洋相互校准站。一般来说，实验室间和实验室内的精度足以解决全球梯度和垂直梯度在这个站的镉，铁，铅，锌。镉和锌同位素显示出明显的变化，在上层水柱和更微妙的变化，在深水中，这些变化是可归因于，部分，逐步质量分馏的同位素从生物吸收和/或吸附的瑞利蒸馏。铁同位素的变化是由于较重的地壳尘埃和热液来源和轻铁还原沉积物。铅同位素的变化是由人为源同位素组成的时间变化和铀的相对贡献引起的。S.和欧洲的铅源。Cu和Mo同位素变异性更微妙，接近分析精度。尽管目前的情况足以继续进行GEOTRACES，但应该有可能提高其中一些性质的实验室内和实验室间精密度。
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.