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Geological controls on fluid flow and gas hydrate pingo development on the Barents Sea margin

In 2014, the discovery of seafloor mounds leaking methane gas into the water column in the northwestern Barents Sea became the first to document the existence of non‐permafrost related gas hydrate pingos (GHP) on the Eurasian Arctic shelf. The discovered site is given attention because the gas hydra... Full description

Journal Title: Geochemistry Geophysics Geosystems
Main Author: Waage, Malin
Other Authors: Portnov, Aleksei D , Serov, Pavel , Bünz, Stefan , Waghorn, Kate Alyse , Vadakkepuliyambatta, Sunil , Mienert, Jurgen , Andreassen, Karin
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 1525-2027 ; DOI: 10.1029/2018GC007930 ; DOI: 10.1029/2018GC007930
Zum Text:
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recordid: nora_new10037/14528
title: Geological controls on fluid flow and gas hydrate pingo development on the Barents Sea margin
format: Article
creator:
  • Waage, Malin
  • Portnov, Aleksei D
  • Serov, Pavel
  • Bünz, Stefan
  • Waghorn, Kate Alyse
  • Vadakkepuliyambatta, Sunil
  • Mienert, Jurgen
  • Andreassen, Karin
subjects:
  • Gas Hydrate Pingo
  • Fluid Flow
  • Gas Chimney
  • Faults
  • Hornsund Fault Zone
  • High‐Resolution 3d Seismic
ispartof: Geochemistry Geophysics Geosystems
description: In 2014, the discovery of seafloor mounds leaking methane gas into the water column in the northwestern Barents Sea became the first to document the existence of non‐permafrost related gas hydrate pingos (GHP) on the Eurasian Arctic shelf. The discovered site is given attention because the gas hydrates occur close to the upper limit of the gas hydrate stability, thus may be vulnerable to climatic forcing. In addition, this site lies on the regional Hornsund Fault Zone marking a transition between the oceanic and continental crust. The Hornsund Fault Zone is known to coincide with an extensive seafloor gas seepage area; however, until now lack of seismic data prevented connecting deep structural elements to shallow seepages. Here we use high‐resolution P‐Cable 3D seismic data to study the subsurface architecture of GHPs and underlying glacial and pre‐glacial deposits. The data show gas hydrates, authigenic carbonates and free gas within the GHPs on top of gas chimneys piercing a thin section...
language: eng
source:
identifier: ISSN: 1525-2027 ; DOI: 10.1029/2018GC007930 ; DOI: 10.1029/2018GC007930
fulltext: fulltext_linktorsrc
issn:
  • 15252027
  • 1525-2027
url: Link


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titleGeological controls on fluid flow and gas hydrate pingo development on the Barents Sea margin
creatorWaage, Malin ; Portnov, Aleksei D ; Serov, Pavel ; Bünz, Stefan ; Waghorn, Kate Alyse ; Vadakkepuliyambatta, Sunil ; Mienert, Jurgen ; Andreassen, Karin
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subjectGas Hydrate Pingo ; Fluid Flow ; Gas Chimney ; Faults ; Hornsund Fault Zone ; High‐Resolution 3d Seismic
descriptionIn 2014, the discovery of seafloor mounds leaking methane gas into the water column in the northwestern Barents Sea became the first to document the existence of non‐permafrost related gas hydrate pingos (GHP) on the Eurasian Arctic shelf. The discovered site is given attention because the gas hydrates occur close to the upper limit of the gas hydrate stability, thus may be vulnerable to climatic forcing. In addition, this site lies on the regional Hornsund Fault Zone marking a transition between the oceanic and continental crust. The Hornsund Fault Zone is known to coincide with an extensive seafloor gas seepage area; however, until now lack of seismic data prevented connecting deep structural elements to shallow seepages. Here we use high‐resolution P‐Cable 3D seismic data to study the subsurface architecture of GHPs and underlying glacial and pre‐glacial deposits. The data show gas hydrates, authigenic carbonates and free gas within the GHPs on top of gas chimneys piercing a thin section...
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titleGeological controls on fluid flow and gas hydrate pingo development on the Barents Sea margin
descriptionIn 2014, the discovery of seafloor mounds leaking methane gas into the water column in the northwestern Barents Sea became the first to document the existence of non‐permafrost related gas hydrate pingos (GHP) on the Eurasian Arctic shelf. The discovered site is given attention because the gas hydrates occur close to the upper limit of the gas hydrate stability, thus may be vulnerable to climatic forcing. In addition, this site lies on the regional Hornsund Fault Zone marking a transition between the oceanic and continental crust. The Hornsund Fault Zone is known to coincide with an extensive seafloor gas seepage area; however, until now lack of seismic data prevented connecting deep structural elements to shallow seepages. Here we use high‐resolution P‐Cable 3D seismic data to study the subsurface architecture of GHPs and underlying glacial and pre‐glacial deposits. The data show gas hydrates, authigenic carbonates and free gas within the GHPs on top of gas chimneys piercing a thin section...
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abstractIn 2014, the discovery of seafloor mounds leaking methane gas into the water column in the northwestern Barents Sea became the first to document the existence of non‐permafrost related gas hydrate pingos (GHP) on the Eurasian Arctic shelf. The discovered site is given attention because the gas hydrates occur close to the upper limit of the gas hydrate stability, thus may be vulnerable to climatic forcing. In addition, this site lies on the regional Hornsund Fault Zone marking a transition between the oceanic and continental crust. The Hornsund Fault Zone is known to coincide with an extensive seafloor gas seepage area; however, until now lack of seismic data prevented connecting deep structural elements to shallow seepages. Here we use high‐resolution P‐Cable 3D seismic data to study the subsurface architecture of GHPs and underlying glacial and pre‐glacial deposits. The data show gas hydrates, authigenic carbonates and free gas within the GHPs on top of gas chimneys piercing a thin section...
pubWiley
doi10.1029/2018GC007930
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volume20
pages630-650
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date2019-02