The Håkon Mosby mud volcano: 330 000 years of focused fluid flow activity at the SW Barents Sea slope
Studying the morphology and subsurface geometry of mud volcanoes provides insights into their activity. This paper describes the internal structure of the Håkon Mosby mud volcano (HMMV) in the southwestern Barents Sea and presents a conceptual model of its evolution. The lack of a mud edifice and th...
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2009
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ftnerc:oai:nora.nerc.ac.uk:166436 2023-05-15T15:38:46+02:00 The Håkon Mosby mud volcano: 330 000 years of focused fluid flow activity at the SW Barents Sea slope Perez-Garcia, C. Feseker, T. Mienert, J. Berndt, C. 2009-07-01 http://nora.nerc.ac.uk/id/eprint/166436/ https://doi.org/10.1016/j.margeo.2009.03.022 unknown Perez-Garcia, C.; Feseker, T.; Mienert, J.; Berndt, C. 2009 The Håkon Mosby mud volcano: 330 000 years of focused fluid flow activity at the SW Barents Sea slope. Marine Geology, 262 (1-4). 105-115. https://doi.org/10.1016/j.margeo.2009.03.022 <https://doi.org/10.1016/j.margeo.2009.03.022> Publication - Article PeerReviewed 2009 ftnerc https://doi.org/10.1016/j.margeo.2009.03.022 2023-02-04T19:35:29Z Studying the morphology and subsurface geometry of mud volcanoes provides insights into their activity. This paper describes the internal structure of the Håkon Mosby mud volcano (HMMV) in the southwestern Barents Sea and presents a conceptual model of its evolution. The lack of a mud edifice and the profuse gas flares suggest that in the recent past the mud volcano evolution was predominantly controlled by venting of gas-rich fluids and free gas. However, the analysis of high-resolution single-channel seismic (SCS) data reveals for the first time the existence of a pseudo-mud chamber at the top of the 3 km deep central conduit. It was once created at the seabed and is now a buried expression that acts as mud chamber. The pseudo-mud chamber is situated approximately 300 m below the seafloor, directly above the 330 ka Bear Island Slide (BIS) scar reflection and below glacigenic debris flow deposits that constitute the sediment on top. The sediment profiler data indicates a younger mud deposit above the debris flows, which points to a reactivation of the mud volcano. The reactivation was most likely triggered by the contrast in density between the gas-rich mud chamber and the high-density debris flow deposits. Three stages, i.e. initiation, sealing and reactivation, and a second active period define the evolution of this young mud volcano. Both, the morphology and size of the conduit as well as in-situ temperature gradients point towards a focused and rapid fluid flow. Article in Journal/Newspaper Barents Sea Bear Island Natural Environment Research Council: NERC Open Research Archive Barents Sea Bear Island ENVELOPE(-67.250,-67.250,-68.151,-68.151) Marine Geology 262 1-4 105 115 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
Studying the morphology and subsurface geometry of mud volcanoes provides insights into their activity. This paper describes the internal structure of the Håkon Mosby mud volcano (HMMV) in the southwestern Barents Sea and presents a conceptual model of its evolution. The lack of a mud edifice and the profuse gas flares suggest that in the recent past the mud volcano evolution was predominantly controlled by venting of gas-rich fluids and free gas. However, the analysis of high-resolution single-channel seismic (SCS) data reveals for the first time the existence of a pseudo-mud chamber at the top of the 3 km deep central conduit. It was once created at the seabed and is now a buried expression that acts as mud chamber. The pseudo-mud chamber is situated approximately 300 m below the seafloor, directly above the 330 ka Bear Island Slide (BIS) scar reflection and below glacigenic debris flow deposits that constitute the sediment on top. The sediment profiler data indicates a younger mud deposit above the debris flows, which points to a reactivation of the mud volcano. The reactivation was most likely triggered by the contrast in density between the gas-rich mud chamber and the high-density debris flow deposits. Three stages, i.e. initiation, sealing and reactivation, and a second active period define the evolution of this young mud volcano. Both, the morphology and size of the conduit as well as in-situ temperature gradients point towards a focused and rapid fluid flow. |
format |
Article in Journal/Newspaper |
author |
Perez-Garcia, C. Feseker, T. Mienert, J. Berndt, C. |
spellingShingle |
Perez-Garcia, C. Feseker, T. Mienert, J. Berndt, C. The Håkon Mosby mud volcano: 330 000 years of focused fluid flow activity at the SW Barents Sea slope |
author_facet |
Perez-Garcia, C. Feseker, T. Mienert, J. Berndt, C. |
author_sort |
Perez-Garcia, C. |
title |
The Håkon Mosby mud volcano: 330 000 years of focused fluid flow activity at the SW Barents Sea slope |
title_short |
The Håkon Mosby mud volcano: 330 000 years of focused fluid flow activity at the SW Barents Sea slope |
title_full |
The Håkon Mosby mud volcano: 330 000 years of focused fluid flow activity at the SW Barents Sea slope |
title_fullStr |
The Håkon Mosby mud volcano: 330 000 years of focused fluid flow activity at the SW Barents Sea slope |
title_full_unstemmed |
The Håkon Mosby mud volcano: 330 000 years of focused fluid flow activity at the SW Barents Sea slope |
title_sort |
håkon mosby mud volcano: 330 000 years of focused fluid flow activity at the sw barents sea slope |
publishDate |
2009 |
url |
http://nora.nerc.ac.uk/id/eprint/166436/ https://doi.org/10.1016/j.margeo.2009.03.022 |
long_lat |
ENVELOPE(-67.250,-67.250,-68.151,-68.151) |
geographic |
Barents Sea Bear Island |
geographic_facet |
Barents Sea Bear Island |
genre |
Barents Sea Bear Island |
genre_facet |
Barents Sea Bear Island |
op_relation |
Perez-Garcia, C.; Feseker, T.; Mienert, J.; Berndt, C. 2009 The Håkon Mosby mud volcano: 330 000 years of focused fluid flow activity at the SW Barents Sea slope. Marine Geology, 262 (1-4). 105-115. https://doi.org/10.1016/j.margeo.2009.03.022 <https://doi.org/10.1016/j.margeo.2009.03.022> |
op_doi |
https://doi.org/10.1016/j.margeo.2009.03.022 |
container_title |
Marine Geology |
container_volume |
262 |
container_issue |
1-4 |
container_start_page |
105 |
op_container_end_page |
115 |
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1766370084313366528 |