Gas hydrates of nonpressurized (GC) and pressurized (DAPC) sediment cores from the Hakon Mosby Mud Volcano, SW Barents Sea
The occurrence of gas hydrates at submarine mud volcanoes (MVs) located within the gas hydrate stability zone (GHSZ) is controlled by upward fluid and heat flux associated with MV activity. Determining the spatial distribution of gas hydrates at MVs is crucial to evaluate their sensitivity to known...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.770365 2023-05-15T15:38:55+02:00 Gas hydrates of nonpressurized (GC) and pressurized (DAPC) sediment cores from the Hakon Mosby Mud Volcano, SW Barents Sea Pape, Thomas Feseker, Tomas Kasten, Sabine Fischer, David Bohrmann, Gerhard MEDIAN LATITUDE: 72.005605 * MEDIAN LONGITUDE: 14.725499 * SOUTH-BOUND LATITUDE: 72.002400 * WEST-BOUND LONGITUDE: 14.712300 * NORTH-BOUND LATITUDE: 72.008000 * EAST-BOUND LONGITUDE: 14.735000 * DATE/TIME START: 2007-06-25T19:30:00 * DATE/TIME END: 2007-07-05T21:49:00 2011-10-11 application/zip, 5 datasets https://doi.pangaea.de/10.1594/PANGAEA.770365 https://doi.org/10.1594/PANGAEA.770365 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.770365 https://doi.org/10.1594/PANGAEA.770365 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Pape, Thomas; Feseker, Tomas; Kasten, Sabine; Fischer, David; Bohrmann, Gerhard (2011): Distribution and abundance of gas hydrates in near-surface deposits of the Håkon Mosby Mud Volcano, SW Barents Sea. Geochemistry, Geophysics, Geosystems, 12(9), Q09009, 21 PP., https://doi.org/10.1029/2011GC003575 ARK-XXII/1b Center for Marine Environmental Sciences GC Gravity corer HERMES Hotspot Ecosystem Research on the Margins of European Seas MARUM Norwegian Sea PC Piston corer Polarstern PS70 PS70/053-1 PS70/054-1 PS70/068-1 PS70/069-1 PS70/081-1 PS70/092-1 PS70/093-1 PS70/094-1 PS70/097-1 PS70/098-1 PS70/102-1 PS70/110-1 PS70/113-1 PS70/117-1 PS70/122-1 PS70/126-1 PS70/133-1 Dataset 2011 ftpangaea https://doi.org/10.1594/PANGAEA.770365 https://doi.org/10.1029/2011GC003575 2023-01-20T07:32:19Z The occurrence of gas hydrates at submarine mud volcanoes (MVs) located within the gas hydrate stability zone (GHSZ) is controlled by upward fluid and heat flux associated with MV activity. Determining the spatial distribution of gas hydrates at MVs is crucial to evaluate their sensitivity to known episodic changes in volcanic activity. We determined the hydrocarbon inventory and spatial distribution of hydrates at an individual MV structure. The Håkon Mosby Mud Volcano (HMMV), located at 1,250 m water depth on the Barents Sea slope, was investigated by combined pressure core sampling, heat flow measurements, and pore water chemical analysis. Quantitative pressure core degassing revealed gas-sediment ratios between 3.1 and 25.7, corresponding to hydrate concentrations of up to 21.3% of the pore volume. Hydrocarbon compositions and physicochemical conditions imply that gas hydrates incipiently crystallize as structure I hydrate, with a dissociation temperature of around 13.8°C at this water depth. Based on numerous in situ measurements of the geothermal gradient in the seabed, pore water sulfate profiles and microbathymetric data, we show that the thickness of the GHSZ increases from less than 1 m at the warm center to around 47 m in the outer parts of the HMMV. We estimate the total mass of hydrate-bound methane stored at the HMMV to be about 102.5 kt, of which 2.8 kt are located within the morphological Unit I around the center and thus are likely to be dissociated in the course of a large eruption. Dataset Barents Sea Norwegian Sea PANGAEA - Data Publisher for Earth & Environmental Science Barents Sea Norwegian Sea ENVELOPE(14.712300,14.735000,72.008000,72.002400) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ARK-XXII/1b Center for Marine Environmental Sciences GC Gravity corer HERMES Hotspot Ecosystem Research on the Margins of European Seas MARUM Norwegian Sea PC Piston corer Polarstern PS70 PS70/053-1 PS70/054-1 PS70/068-1 PS70/069-1 PS70/081-1 PS70/092-1 PS70/093-1 PS70/094-1 PS70/097-1 PS70/098-1 PS70/102-1 PS70/110-1 PS70/113-1 PS70/117-1 PS70/122-1 PS70/126-1 PS70/133-1 |
spellingShingle |
ARK-XXII/1b Center for Marine Environmental Sciences GC Gravity corer HERMES Hotspot Ecosystem Research on the Margins of European Seas MARUM Norwegian Sea PC Piston corer Polarstern PS70 PS70/053-1 PS70/054-1 PS70/068-1 PS70/069-1 PS70/081-1 PS70/092-1 PS70/093-1 PS70/094-1 PS70/097-1 PS70/098-1 PS70/102-1 PS70/110-1 PS70/113-1 PS70/117-1 PS70/122-1 PS70/126-1 PS70/133-1 Pape, Thomas Feseker, Tomas Kasten, Sabine Fischer, David Bohrmann, Gerhard Gas hydrates of nonpressurized (GC) and pressurized (DAPC) sediment cores from the Hakon Mosby Mud Volcano, SW Barents Sea |
topic_facet |
ARK-XXII/1b Center for Marine Environmental Sciences GC Gravity corer HERMES Hotspot Ecosystem Research on the Margins of European Seas MARUM Norwegian Sea PC Piston corer Polarstern PS70 PS70/053-1 PS70/054-1 PS70/068-1 PS70/069-1 PS70/081-1 PS70/092-1 PS70/093-1 PS70/094-1 PS70/097-1 PS70/098-1 PS70/102-1 PS70/110-1 PS70/113-1 PS70/117-1 PS70/122-1 PS70/126-1 PS70/133-1 |
description |
The occurrence of gas hydrates at submarine mud volcanoes (MVs) located within the gas hydrate stability zone (GHSZ) is controlled by upward fluid and heat flux associated with MV activity. Determining the spatial distribution of gas hydrates at MVs is crucial to evaluate their sensitivity to known episodic changes in volcanic activity. We determined the hydrocarbon inventory and spatial distribution of hydrates at an individual MV structure. The Håkon Mosby Mud Volcano (HMMV), located at 1,250 m water depth on the Barents Sea slope, was investigated by combined pressure core sampling, heat flow measurements, and pore water chemical analysis. Quantitative pressure core degassing revealed gas-sediment ratios between 3.1 and 25.7, corresponding to hydrate concentrations of up to 21.3% of the pore volume. Hydrocarbon compositions and physicochemical conditions imply that gas hydrates incipiently crystallize as structure I hydrate, with a dissociation temperature of around 13.8°C at this water depth. Based on numerous in situ measurements of the geothermal gradient in the seabed, pore water sulfate profiles and microbathymetric data, we show that the thickness of the GHSZ increases from less than 1 m at the warm center to around 47 m in the outer parts of the HMMV. We estimate the total mass of hydrate-bound methane stored at the HMMV to be about 102.5 kt, of which 2.8 kt are located within the morphological Unit I around the center and thus are likely to be dissociated in the course of a large eruption. |
format |
Dataset |
author |
Pape, Thomas Feseker, Tomas Kasten, Sabine Fischer, David Bohrmann, Gerhard |
author_facet |
Pape, Thomas Feseker, Tomas Kasten, Sabine Fischer, David Bohrmann, Gerhard |
author_sort |
Pape, Thomas |
title |
Gas hydrates of nonpressurized (GC) and pressurized (DAPC) sediment cores from the Hakon Mosby Mud Volcano, SW Barents Sea |
title_short |
Gas hydrates of nonpressurized (GC) and pressurized (DAPC) sediment cores from the Hakon Mosby Mud Volcano, SW Barents Sea |
title_full |
Gas hydrates of nonpressurized (GC) and pressurized (DAPC) sediment cores from the Hakon Mosby Mud Volcano, SW Barents Sea |
title_fullStr |
Gas hydrates of nonpressurized (GC) and pressurized (DAPC) sediment cores from the Hakon Mosby Mud Volcano, SW Barents Sea |
title_full_unstemmed |
Gas hydrates of nonpressurized (GC) and pressurized (DAPC) sediment cores from the Hakon Mosby Mud Volcano, SW Barents Sea |
title_sort |
gas hydrates of nonpressurized (gc) and pressurized (dapc) sediment cores from the hakon mosby mud volcano, sw barents sea |
publisher |
PANGAEA |
publishDate |
2011 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.770365 https://doi.org/10.1594/PANGAEA.770365 |
op_coverage |
MEDIAN LATITUDE: 72.005605 * MEDIAN LONGITUDE: 14.725499 * SOUTH-BOUND LATITUDE: 72.002400 * WEST-BOUND LONGITUDE: 14.712300 * NORTH-BOUND LATITUDE: 72.008000 * EAST-BOUND LONGITUDE: 14.735000 * DATE/TIME START: 2007-06-25T19:30:00 * DATE/TIME END: 2007-07-05T21:49:00 |
long_lat |
ENVELOPE(14.712300,14.735000,72.008000,72.002400) |
geographic |
Barents Sea Norwegian Sea |
geographic_facet |
Barents Sea Norwegian Sea |
genre |
Barents Sea Norwegian Sea |
genre_facet |
Barents Sea Norwegian Sea |
op_source |
Supplement to: Pape, Thomas; Feseker, Tomas; Kasten, Sabine; Fischer, David; Bohrmann, Gerhard (2011): Distribution and abundance of gas hydrates in near-surface deposits of the Håkon Mosby Mud Volcano, SW Barents Sea. Geochemistry, Geophysics, Geosystems, 12(9), Q09009, 21 PP., https://doi.org/10.1029/2011GC003575 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.770365 https://doi.org/10.1594/PANGAEA.770365 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.770365 https://doi.org/10.1029/2011GC003575 |
_version_ |
1766370335160008704 |