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

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-mine...

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Bibliographic Details
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
Description
Summary: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 ...

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