Delta 13C hydrocarbon, geochemistry of pore water sediment and physical oceanography (CTD) off the Vesteralen coast, northern Norway ...
We investigated active methane seeps in a water depth of 200 m in the Hola area off the coast of Vesteralen, northern Norway, to assess (1) hydrocarbon sources, (2) migration pathways and (3) the influence of hydrocarbon seepage on sediment pore water and water column chemistry. The seepage area is...
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Online Access: | https://dx.doi.org/10.1594/pangaea.876596 https://doi.pangaea.de/10.1594/PANGAEA.876596 |
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ftdatacite:10.1594/pangaea.876596 2024-09-15T18:25:48+00:00 Delta 13C hydrocarbon, geochemistry of pore water sediment and physical oceanography (CTD) off the Vesteralen coast, northern Norway ... Sauer, Simone Knies, Jochen Lepland, Aivo Chand, S Eichinger, Florian Schubert, Carsten J 2017 application/zip https://dx.doi.org/10.1594/pangaea.876596 https://doi.pangaea.de/10.1594/PANGAEA.876596 en eng PANGAEA https://dx.doi.org/10.1016/j.chemgeo.2015.10.025 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 article Collection Supplementary Publication Series of Datasets 2017 ftdatacite https://doi.org/10.1594/pangaea.87659610.1016/j.chemgeo.2015.10.025 2024-08-01T11:01:20Z We investigated active methane seeps in a water depth of 200 m in the Hola area off the coast of Vesteralen, northern Norway, to assess (1) hydrocarbon sources, (2) migration pathways and (3) the influence of hydrocarbon seepage on sediment pore water and water column chemistry. The seepage area is characterised by the presence of gas flares in the water column as revealed by hydro acoustic surveys and elevated methane concentrations of up to 42 nM ca. 5 m above the seafloor. Pore water analyses of three gravity cores from the seepage area show varying depths of the sulphate-methane-transition zone (SMTZ) between 80 cm and > 250 cm indicating spatially heterogeneous methane ascent. The isotopic composition of methane (d13C from - 40per mil to - 63per mil and d2H from - 191per mil to - 225per mil) and d13C depth profiles of methane and dissolved inorganic carbon show that the hydrocarbons are predominantly of thermogenic origin, consistent with d13C values of C2 to C4 hydrocarbons. Isotope data also ... : Supplement to: Sauer, Simone; Knies, Jochen; Lepland, Aivo; Chand, S; Eichinger, Florian; Schubert, Carsten J (2015): Hydrocarbon sources of cold seeps off the Vesteralen coast, northern Norway. Chemical Geology, 417, 371-382 ... Article in Journal/Newspaper Northern Norway DataCite |
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ftdatacite |
language |
English |
description |
We investigated active methane seeps in a water depth of 200 m in the Hola area off the coast of Vesteralen, northern Norway, to assess (1) hydrocarbon sources, (2) migration pathways and (3) the influence of hydrocarbon seepage on sediment pore water and water column chemistry. The seepage area is characterised by the presence of gas flares in the water column as revealed by hydro acoustic surveys and elevated methane concentrations of up to 42 nM ca. 5 m above the seafloor. Pore water analyses of three gravity cores from the seepage area show varying depths of the sulphate-methane-transition zone (SMTZ) between 80 cm and > 250 cm indicating spatially heterogeneous methane ascent. The isotopic composition of methane (d13C from - 40per mil to - 63per mil and d2H from - 191per mil to - 225per mil) and d13C depth profiles of methane and dissolved inorganic carbon show that the hydrocarbons are predominantly of thermogenic origin, consistent with d13C values of C2 to C4 hydrocarbons. Isotope data also ... : Supplement to: Sauer, Simone; Knies, Jochen; Lepland, Aivo; Chand, S; Eichinger, Florian; Schubert, Carsten J (2015): Hydrocarbon sources of cold seeps off the Vesteralen coast, northern Norway. Chemical Geology, 417, 371-382 ... |
format |
Article in Journal/Newspaper |
author |
Sauer, Simone Knies, Jochen Lepland, Aivo Chand, S Eichinger, Florian Schubert, Carsten J |
spellingShingle |
Sauer, Simone Knies, Jochen Lepland, Aivo Chand, S Eichinger, Florian Schubert, Carsten J Delta 13C hydrocarbon, geochemistry of pore water sediment and physical oceanography (CTD) off the Vesteralen coast, northern Norway ... |
author_facet |
Sauer, Simone Knies, Jochen Lepland, Aivo Chand, S Eichinger, Florian Schubert, Carsten J |
author_sort |
Sauer, Simone |
title |
Delta 13C hydrocarbon, geochemistry of pore water sediment and physical oceanography (CTD) off the Vesteralen coast, northern Norway ... |
title_short |
Delta 13C hydrocarbon, geochemistry of pore water sediment and physical oceanography (CTD) off the Vesteralen coast, northern Norway ... |
title_full |
Delta 13C hydrocarbon, geochemistry of pore water sediment and physical oceanography (CTD) off the Vesteralen coast, northern Norway ... |
title_fullStr |
Delta 13C hydrocarbon, geochemistry of pore water sediment and physical oceanography (CTD) off the Vesteralen coast, northern Norway ... |
title_full_unstemmed |
Delta 13C hydrocarbon, geochemistry of pore water sediment and physical oceanography (CTD) off the Vesteralen coast, northern Norway ... |
title_sort |
delta 13c hydrocarbon, geochemistry of pore water sediment and physical oceanography (ctd) off the vesteralen coast, northern norway ... |
publisher |
PANGAEA |
publishDate |
2017 |
url |
https://dx.doi.org/10.1594/pangaea.876596 https://doi.pangaea.de/10.1594/PANGAEA.876596 |
genre |
Northern Norway |
genre_facet |
Northern Norway |
op_relation |
https://dx.doi.org/10.1016/j.chemgeo.2015.10.025 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_doi |
https://doi.org/10.1594/pangaea.87659610.1016/j.chemgeo.2015.10.025 |
_version_ |
1810466270439538688 |