Detrital neodymium and (radio)carbon as complementary sedimentary bedfellows? The Western Arctic Ocean as a testbed ...

• Main Authors: Schwab, Melissa S., Rickli, Jörg D., Macdonald, Robie W., Harvey, H. Rodger, Haghipour, Negar, Eglinton, Timothy I.
• Format: Text
• Language: English
• Published: ETH Zurich 2021
• Subjects: Western Arctic Ocean; Organic carbon; Carbon-14; Neodymium isotopes; Strontium isotopes; Detrital sediments; Arctic Ocean; Bering Sea; Mackenzie river
• Online Access: https://dx.doi.org/10.3929/ethz-b-000513802; http://hdl.handle.net/20.500.11850/513802

Interactions between organic and detrital mineral phases strongly influence both the dispersal and accumulation of terrestrial organic carbon (OC) in continental margin sediments. Yet the complex interplay among biological, chemical, and physical processes limits our understanding of how organo-mineral interactions evolve during sediment transfer and burial. In particular, diverse OC sources and complex hydrodynamic processes hinder the assessment of how the partnership of organic matter and its mineral host evolves during supply and dispersal over continental margins. In this study, we integrate new and compiled sedimentological (grain size, surface area), organic (%OC, OC-δ13C, OC-F14C), and inorganic isotopic (εNd, 87Sr/86Sr) geochemical data for a broad suite of surface sediments spanning the Western Arctic Ocean from the Bering Sea to the Mackenzie River Delta that capture diverse sources and ages of both terrestrial and marine material deposited in contrasting shelf and slope settings. Spatial ... : Geochimica et Cosmochimica Acta, 315 ...