3D Seismic Investigation of a Gas Hydrate and Fluid Flow System on an Active Mid‐Ocean Ridge; Svyatogor Ridge, Fram Strait
Accepted manuscript version. Published version available at https://doi.org/10.1029/2018GC007482 . Tectonic settings play a large role in the development of fluid flow pathways for gas migrating through sedimentary strata. Many gas hydrate systems worldwide are located on either passive continental...
Published in: | Geochemistry, Geophysics, Geosystems |
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American Geophysical Union (AGU)
2018
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Online Access: | https://hdl.handle.net/10037/13331 https://doi.org/10.1029/2018GC007482 |
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ftunivtroemsoe:oai:munin.uit.no:10037/13331 2023-05-15T14:27:10+02:00 3D Seismic Investigation of a Gas Hydrate and Fluid Flow System on an Active Mid‐Ocean Ridge; Svyatogor Ridge, Fram Strait Waghorn, Kate Alyse Bünz, Stefan Plaza-Faverola, Andreia Johnson, Joel E. 2018-05-12 https://hdl.handle.net/10037/13331 https://doi.org/10.1029/2018GC007482 eng eng American Geophysical Union (AGU) Geochemistry Geophysics Geosystems info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ Waghorn, K.A., Bünz, S., Plaza-Faverola, A. & Johnson, J.E. (2018). 3D Seismic Investigation of a Gas Hydrate and Fluid Flow System on an Active Mid‐Ocean Ridge; Svyatogor Ridge, Fram Strait. Geochemistry Geophysics Geosystems. https://doi.org/10.1029/2018GC007482 FRIDAID 1585858 doi:10.1029/2018GC007482 1525-2027 https://hdl.handle.net/10037/13331 openAccess VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 Gas Hydrate Tectonic Stress Fluid Flow Journal article Tidsskriftartikkel Peer reviewed 2018 ftunivtroemsoe https://doi.org/10.1029/2018GC007482 2021-06-25T17:55:58Z Accepted manuscript version. Published version available at https://doi.org/10.1029/2018GC007482 . Tectonic settings play a large role in the development of fluid flow pathways for gas migrating through sedimentary strata. Many gas hydrate systems worldwide are located on either passive continental margins, in large contourite deposits on the slopes of passive continental margins or on subduction margins. The Svyatogor Ridge, however, located at the northwestern flank of the Knipovich Ridge and south of the Molloy Transform Fault (Fram Strait), is a gas hydrate system which is located on an actively spreading margin. Svyatogor Ridge has evidence of shallow gas accumulations; a strong BSR indicating a gas hydrate and underlying free gas system, and fluid flow pathways to the seafloor culminating in pockmarks. Using a high‐resolution P‐Cable 3D seismic survey, we investigate how tectonic and sedimentary regimes have influenced the formation of this well‐developed gas hydrate system. Large‐scale basement faults identified in the seismic data are interpreted as detachment faults, which have exhumed relatively young ultramafic rocks. These detachment faults act as conduits for fluid flow, and are responsible for the formation of folds in the overlying sediments that are breached by faults. We propose a model for fluid flow within this system whereby as sedimentary faults breach upwards through the sedimentary strata, fluid is able to migrate further upwards. We find that the tectonic regime on Svyatogor Ridge is the dominant driver of fluid migration and episodic release at the seafloor. Article in Journal/Newspaper Arctic Fram Strait University of Tromsø: Munin Open Research Archive Knipovich Ridge ENVELOPE(7.074,7.074,75.712,75.712) Molloy ENVELOPE(70.065,70.065,-49.360,-49.360) Svyatogor Ridge ENVELOPE(5.783,5.783,78.233,78.233) Geochemistry, Geophysics, Geosystems 19 8 2325 2341 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 Gas Hydrate Tectonic Stress Fluid Flow |
spellingShingle |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 Gas Hydrate Tectonic Stress Fluid Flow Waghorn, Kate Alyse Bünz, Stefan Plaza-Faverola, Andreia Johnson, Joel E. 3D Seismic Investigation of a Gas Hydrate and Fluid Flow System on an Active Mid‐Ocean Ridge; Svyatogor Ridge, Fram Strait |
topic_facet |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 Gas Hydrate Tectonic Stress Fluid Flow |
description |
Accepted manuscript version. Published version available at https://doi.org/10.1029/2018GC007482 . Tectonic settings play a large role in the development of fluid flow pathways for gas migrating through sedimentary strata. Many gas hydrate systems worldwide are located on either passive continental margins, in large contourite deposits on the slopes of passive continental margins or on subduction margins. The Svyatogor Ridge, however, located at the northwestern flank of the Knipovich Ridge and south of the Molloy Transform Fault (Fram Strait), is a gas hydrate system which is located on an actively spreading margin. Svyatogor Ridge has evidence of shallow gas accumulations; a strong BSR indicating a gas hydrate and underlying free gas system, and fluid flow pathways to the seafloor culminating in pockmarks. Using a high‐resolution P‐Cable 3D seismic survey, we investigate how tectonic and sedimentary regimes have influenced the formation of this well‐developed gas hydrate system. Large‐scale basement faults identified in the seismic data are interpreted as detachment faults, which have exhumed relatively young ultramafic rocks. These detachment faults act as conduits for fluid flow, and are responsible for the formation of folds in the overlying sediments that are breached by faults. We propose a model for fluid flow within this system whereby as sedimentary faults breach upwards through the sedimentary strata, fluid is able to migrate further upwards. We find that the tectonic regime on Svyatogor Ridge is the dominant driver of fluid migration and episodic release at the seafloor. |
format |
Article in Journal/Newspaper |
author |
Waghorn, Kate Alyse Bünz, Stefan Plaza-Faverola, Andreia Johnson, Joel E. |
author_facet |
Waghorn, Kate Alyse Bünz, Stefan Plaza-Faverola, Andreia Johnson, Joel E. |
author_sort |
Waghorn, Kate Alyse |
title |
3D Seismic Investigation of a Gas Hydrate and Fluid Flow System on an Active Mid‐Ocean Ridge; Svyatogor Ridge, Fram Strait |
title_short |
3D Seismic Investigation of a Gas Hydrate and Fluid Flow System on an Active Mid‐Ocean Ridge; Svyatogor Ridge, Fram Strait |
title_full |
3D Seismic Investigation of a Gas Hydrate and Fluid Flow System on an Active Mid‐Ocean Ridge; Svyatogor Ridge, Fram Strait |
title_fullStr |
3D Seismic Investigation of a Gas Hydrate and Fluid Flow System on an Active Mid‐Ocean Ridge; Svyatogor Ridge, Fram Strait |
title_full_unstemmed |
3D Seismic Investigation of a Gas Hydrate and Fluid Flow System on an Active Mid‐Ocean Ridge; Svyatogor Ridge, Fram Strait |
title_sort |
3d seismic investigation of a gas hydrate and fluid flow system on an active mid‐ocean ridge; svyatogor ridge, fram strait |
publisher |
American Geophysical Union (AGU) |
publishDate |
2018 |
url |
https://hdl.handle.net/10037/13331 https://doi.org/10.1029/2018GC007482 |
long_lat |
ENVELOPE(7.074,7.074,75.712,75.712) ENVELOPE(70.065,70.065,-49.360,-49.360) ENVELOPE(5.783,5.783,78.233,78.233) |
geographic |
Knipovich Ridge Molloy Svyatogor Ridge |
geographic_facet |
Knipovich Ridge Molloy Svyatogor Ridge |
genre |
Arctic Fram Strait |
genre_facet |
Arctic Fram Strait |
op_relation |
Geochemistry Geophysics Geosystems info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ Waghorn, K.A., Bünz, S., Plaza-Faverola, A. & Johnson, J.E. (2018). 3D Seismic Investigation of a Gas Hydrate and Fluid Flow System on an Active Mid‐Ocean Ridge; Svyatogor Ridge, Fram Strait. Geochemistry Geophysics Geosystems. https://doi.org/10.1029/2018GC007482 FRIDAID 1585858 doi:10.1029/2018GC007482 1525-2027 https://hdl.handle.net/10037/13331 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1029/2018GC007482 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
19 |
container_issue |
8 |
container_start_page |
2325 |
op_container_end_page |
2341 |
_version_ |
1766300770894872576 |