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Chromium isotope cycling in the water column and sediments of the Peruvian continental margin

Abstract.

"Chromium (Cr) isotope fractionation is sensitive to redox changes and the Cr isotopic composition (δ53Cr) of sedimentary rocks has been used to reconstruct marine redox conditions and atmospheric oxygenation in the past. However, little is known about the behaviour of chromium isotopes across modern marine redox boundaries. We investigated Cr concentrations and δ53Cr variations in seawater and sediment across the Peruvian oxygen minimum zone (OMZ) to provide a better understanding of Cr cycling in the ocean. [...]"

Source: Geochimica et Cosmochimica
Authors: S. Bruggmann et al.
DOI: 10.1016/j.gca.2019.05.001

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