Porosity of MeBo sediment cores from the continental margin off Svalbard - cruise MSM57
During expedition MARIA S. MERIAN MSM57/2 to the Svalbard margin offshore Prins Karls Forland, the seafloor drill rig MARUM‐MeBo70 was used to assess the landward termination of the gas hydrate system in water depths between 340 and 446 m. The study region shows abundant seafloor gas vents, clustere...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.890370 2023-05-15T18:03:33+02:00 Porosity of MeBo sediment cores from the continental margin off Svalbard - cruise MSM57 Pape, Thomas Malnati, Janice Bohrmann, Gerhard MEDIAN LATITUDE: 78.556586 * MEDIAN LONGITUDE: 9.441826 * SOUTH-BOUND LATITUDE: 78.548917 * WEST-BOUND LONGITUDE: 9.379817 * NORTH-BOUND LATITUDE: 78.588133 * EAST-BOUND LONGITUDE: 9.494200 * DATE/TIME START: 2016-08-14T18:15:00 * DATE/TIME END: 2016-09-01T07:25:00 2018-05-28 application/zip, 7 datasets https://doi.pangaea.de/10.1594/PANGAEA.890370 https://doi.org/10.1594/PANGAEA.890370 en eng PANGAEA Wallmann, Klaus; Riedel, Michael; Hong, W L; Patton, H; Hubbard, Alun L; Pape, Thomas; Hsu, Chieh-Wei; Schmidt, Christiane; Johnson, J E; Torres, Marta E; Andreassen, Karin; Berndt, Christian; Bohrmann, Gerhard (2018): Gas hydrate dissociation off Svalbard induced by isostatic rebound rather than global warming. Nature Communications, 9(1), https://doi.org/10.1038/s41467-017-02550-9 https://doi.pangaea.de/10.1594/PANGAEA.890370 https://doi.org/10.1594/PANGAEA.890370 CC-BY-NC-SA-3.0: Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY-NC-SA Supplement to: Riedel, Michael; Wallmann, Klaus; Berndt, Christian; Pape, Thomas; Freudenthal, Tim; Bergenthal, Markus; Bünz, Stefan; Bohrmann, Gerhard (2018): In situ temperature measurements at the Svalbard continental margin: Implications for gas hydrate dynamics. Geochemistry, Geophysics, Geosystems, 19(4), 1165-1177, https://doi.org/10.1002/2017GC007288 Center for Marine Environmental Sciences MARUM Dataset 2018 ftpangaea https://doi.org/10.1594/PANGAEA.890370 https://doi.org/10.1002/2017GC007288 https://doi.org/10.1038/s41467-017-02550-9 2023-01-20T07:34:09Z During expedition MARIA S. MERIAN MSM57/2 to the Svalbard margin offshore Prins Karls Forland, the seafloor drill rig MARUM‐MeBo70 was used to assess the landward termination of the gas hydrate system in water depths between 340 and 446 m. The study region shows abundant seafloor gas vents, clustered at a water depth of ∼400 m. The sedimentary environment within the upper 100 m below seafloor (mbsf) is dominated by ice‐berg scours and glacial unconformities. Sediments cored included glacial diamictons and sheet‐sands interbedded with mud. Seismic data show a bottom simulating reflector terminating ∼30 km seaward in ∼760 m water depth before it reaches the theoretical limit of the gas hydrate stability zone (GHSZ) at the drilling transect. We present results of the first in situ temperature measurements conducted with MeBo70 down to 28 mbsf. The data yield temperature gradients between ∼38°C km−1 at the deepest site (446 m) and ∼41°C km−1 at a shallower drill site (390 m). These data constrain combined with in situ pore‐fluid data, sediment porosities, and thermal conductivities the dynamic evolution of the GHSZ during the past 70 years for which bottom water temperature records exist. Gas hydrate is not stable in the sediments at sites shallower than 390 m water depth at the time of acquisition (August 2016). Only at the drill site in 446 m water depth, favorable gas hydrate stability conditions are met (maximum vertical extent of ∼60 mbsf); however, coring did not encounter any gas hydrates. Dataset Prins Karls Forland Svalbard Svalbard margin PANGAEA - Data Publisher for Earth & Environmental Science Svalbard Prins Karls Forland ENVELOPE(11.175,11.175,78.543,78.543) ENVELOPE(9.379817,9.494200,78.588133,78.548917) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Center for Marine Environmental Sciences MARUM |
spellingShingle |
Center for Marine Environmental Sciences MARUM Pape, Thomas Malnati, Janice Bohrmann, Gerhard Porosity of MeBo sediment cores from the continental margin off Svalbard - cruise MSM57 |
topic_facet |
Center for Marine Environmental Sciences MARUM |
description |
During expedition MARIA S. MERIAN MSM57/2 to the Svalbard margin offshore Prins Karls Forland, the seafloor drill rig MARUM‐MeBo70 was used to assess the landward termination of the gas hydrate system in water depths between 340 and 446 m. The study region shows abundant seafloor gas vents, clustered at a water depth of ∼400 m. The sedimentary environment within the upper 100 m below seafloor (mbsf) is dominated by ice‐berg scours and glacial unconformities. Sediments cored included glacial diamictons and sheet‐sands interbedded with mud. Seismic data show a bottom simulating reflector terminating ∼30 km seaward in ∼760 m water depth before it reaches the theoretical limit of the gas hydrate stability zone (GHSZ) at the drilling transect. We present results of the first in situ temperature measurements conducted with MeBo70 down to 28 mbsf. The data yield temperature gradients between ∼38°C km−1 at the deepest site (446 m) and ∼41°C km−1 at a shallower drill site (390 m). These data constrain combined with in situ pore‐fluid data, sediment porosities, and thermal conductivities the dynamic evolution of the GHSZ during the past 70 years for which bottom water temperature records exist. Gas hydrate is not stable in the sediments at sites shallower than 390 m water depth at the time of acquisition (August 2016). Only at the drill site in 446 m water depth, favorable gas hydrate stability conditions are met (maximum vertical extent of ∼60 mbsf); however, coring did not encounter any gas hydrates. |
format |
Dataset |
author |
Pape, Thomas Malnati, Janice Bohrmann, Gerhard |
author_facet |
Pape, Thomas Malnati, Janice Bohrmann, Gerhard |
author_sort |
Pape, Thomas |
title |
Porosity of MeBo sediment cores from the continental margin off Svalbard - cruise MSM57 |
title_short |
Porosity of MeBo sediment cores from the continental margin off Svalbard - cruise MSM57 |
title_full |
Porosity of MeBo sediment cores from the continental margin off Svalbard - cruise MSM57 |
title_fullStr |
Porosity of MeBo sediment cores from the continental margin off Svalbard - cruise MSM57 |
title_full_unstemmed |
Porosity of MeBo sediment cores from the continental margin off Svalbard - cruise MSM57 |
title_sort |
porosity of mebo sediment cores from the continental margin off svalbard - cruise msm57 |
publisher |
PANGAEA |
publishDate |
2018 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.890370 https://doi.org/10.1594/PANGAEA.890370 |
op_coverage |
MEDIAN LATITUDE: 78.556586 * MEDIAN LONGITUDE: 9.441826 * SOUTH-BOUND LATITUDE: 78.548917 * WEST-BOUND LONGITUDE: 9.379817 * NORTH-BOUND LATITUDE: 78.588133 * EAST-BOUND LONGITUDE: 9.494200 * DATE/TIME START: 2016-08-14T18:15:00 * DATE/TIME END: 2016-09-01T07:25:00 |
long_lat |
ENVELOPE(11.175,11.175,78.543,78.543) ENVELOPE(9.379817,9.494200,78.588133,78.548917) |
geographic |
Svalbard Prins Karls Forland |
geographic_facet |
Svalbard Prins Karls Forland |
genre |
Prins Karls Forland Svalbard Svalbard margin |
genre_facet |
Prins Karls Forland Svalbard Svalbard margin |
op_source |
Supplement to: Riedel, Michael; Wallmann, Klaus; Berndt, Christian; Pape, Thomas; Freudenthal, Tim; Bergenthal, Markus; Bünz, Stefan; Bohrmann, Gerhard (2018): In situ temperature measurements at the Svalbard continental margin: Implications for gas hydrate dynamics. Geochemistry, Geophysics, Geosystems, 19(4), 1165-1177, https://doi.org/10.1002/2017GC007288 |
op_relation |
Wallmann, Klaus; Riedel, Michael; Hong, W L; Patton, H; Hubbard, Alun L; Pape, Thomas; Hsu, Chieh-Wei; Schmidt, Christiane; Johnson, J E; Torres, Marta E; Andreassen, Karin; Berndt, Christian; Bohrmann, Gerhard (2018): Gas hydrate dissociation off Svalbard induced by isostatic rebound rather than global warming. Nature Communications, 9(1), https://doi.org/10.1038/s41467-017-02550-9 https://doi.pangaea.de/10.1594/PANGAEA.890370 https://doi.org/10.1594/PANGAEA.890370 |
op_rights |
CC-BY-NC-SA-3.0: Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY-NC-SA |
op_doi |
https://doi.org/10.1594/PANGAEA.890370 https://doi.org/10.1002/2017GC007288 https://doi.org/10.1038/s41467-017-02550-9 |
_version_ |
1766174443249336320 |