Cristin-resultat-ID: 1893040
Sist endret: 24. februar 2021 08:59
NVI-rapporteringsår: 2021
Resultat
Vitenskapelig artikkel
2021

Dynamic and history of methane seepage in the SW Barents Sea: new insights from Leirdjupet Fault Complex

Bidragsytere:
  • Claudio Argentino
  • Kate Alyse Waghorn
  • Sunil Vadakkepuliyambatta
  • Stephane Polteau
  • Stefan Bünz og
  • Giuliana Panieri

Tidsskrift

Scientific Reports
ISSN 2045-2322
e-ISSN 2045-2322
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2021
Publisert online: 2021
Volum: 11
Artikkelnummer: 4373
Open Access

Importkilder

Scopus-ID: 2-s2.0-85101579251

Beskrivelse Beskrivelse

Tittel

Dynamic and history of methane seepage in the SW Barents Sea: new insights from Leirdjupet Fault Complex

Sammendrag

Methane emissions from Arctic continental margins are increasing due to the negative effect of global warming on ice sheet and permafrost stability, but dynamics and timescales of seafloor seepage still remain poorly constrained. Here, we examine sediment cores collected from an active seepage area located between 295 and 353 m water depth in the SW Barents Sea, at Leirdjupet Fault Complex. The geochemical composition of hydrocarbon gas in the sediment indicates a mixture of microbial and thermogenic gas, the latter being sourced from underlying Mesozoic formations. Sediment and carbonate geochemistry reveal a long history of methane emissions that started during Late Weichselian deglaciation after 14.5 cal ka BP. Methane-derived authigenic carbonates precipitated due to local gas hydrate destabilization, in turn triggered by an increasing influx of warm Atlantic water and isostatic rebound linked to the retreat of the Barents Sea Ice Sheet. This study has implications for a better understanding of the dynamic and future evolution of methane seeps in modern analogue systems in Western Antarctica, where the retreat of marine-based ice sheet induced by global warming may cause the release of large amounts of methane from hydrocarbon reservoirs and gas hydrates.

Bidragsytere

Claudio Argentino

  • Tilknyttet:
    Forfatter
    ved Centre for Arctic Gas Hydrate, Environment and Climate ved UiT Norges arktiske universitet

Kate Alyse Waghorn

  • Tilknyttet:
    Forfatter
    ved Centre for Arctic Gas Hydrate, Environment and Climate ved UiT Norges arktiske universitet

Sunil Vadakkepuliyambatta

  • Tilknyttet:
    Forfatter
    ved Centre for Arctic Gas Hydrate, Environment and Climate ved UiT Norges arktiske universitet

Stephane Polteau

  • Tilknyttet:
    Forfatter
    ved Volcanic Basin Petroleum Research AS
  • Tilknyttet:
    Forfatter
    ved Reservoarteknologi ved Institutt for energiteknikk

Stefan Buenz

Bidragsyterens navn vises på dette resultatet som Stefan Bünz
  • Tilknyttet:
    Forfatter
    ved Centre for Arctic Gas Hydrate, Environment and Climate ved UiT Norges arktiske universitet
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