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On The Isotope Composition Of Reactive Iron In Marine Sediments: Redox Shuttle Versus Early Diagenesis, Florian Shultz, Silke Severman, James Mcmanus, Anna Nofke, Ulrike Lomnitz, Christian Hensen
On The Isotope Composition Of Reactive Iron In Marine Sediments: Redox Shuttle Versus Early Diagenesis, Florian Shultz, Silke Severman, James Mcmanus, Anna Nofke, Ulrike Lomnitz, Christian Hensen
James McManus
The isotope composition of reactive iron (Fe) in marine sediments and sedimentary rocks is a promising tool for identifying Fe sources and sinks across ocean basins. In addition to cross-basinal Fe redistribution, which can modify Fe isotope signatures, Fe minerals also undergo diagenetic redistribution during burial. The isotope fractionation associated with this redistribution does not affect the bulk isotope composition, but complicates the identification of mineral- specific isotope signatures. Here, we present new Fe isotope data for Peru margin sediments and revisit previously published data for sediments from the California margin to unravel the impact of early diagenesis on Fe …