Stable isotopic composition of bottom water and benthic foraminifera from Hakon Mosby Mud Vulcano
To investigate the use of benthic foraminifera as a means to document ancient methane release, we determined the stable isotopic composition of tests of live (Rose Bengal stained) and dead specimens of epibenthic Fontbotia wuellerstorfi, preferentially used in paleoceanographic reconstructions, and...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.834860 2023-05-15T15:39:11+02:00 Stable isotopic composition of bottom water and benthic foraminifera from Hakon Mosby Mud Vulcano Mackensen, Andreas Wollenburg, Jutta E Licari, Laetitia MEDIAN LATITUDE: 71.991373 * MEDIAN LONGITUDE: 14.733712 * SOUTH-BOUND LATITUDE: 71.950000 * WEST-BOUND LONGITUDE: 14.716667 * NORTH-BOUND LATITUDE: 72.012700 * EAST-BOUND LONGITUDE: 14.751667 * DATE/TIME START: 2001-08-28T16:04:00 * DATE/TIME END: 2004-06-22T23:14:00 2006-08-13 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.834860 https://doi.org/10.1594/PANGAEA.834860 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.834860 https://doi.org/10.1594/PANGAEA.834860 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Mackensen, Andreas; Wollenburg, Jutta E; Licari, Laetitia (2006): Low d13C in tests of live epibenthic and endobenthic foraminifera at a site of active methane seepage. Paleoceanography, 21(2), PA2022, https://doi.org/10.1029/2005PA001196 AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI Dataset 2006 ftpangaea https://doi.org/10.1594/PANGAEA.834860 https://doi.org/10.1029/2005PA001196 2023-01-20T07:33:19Z To investigate the use of benthic foraminifera as a means to document ancient methane release, we determined the stable isotopic composition of tests of live (Rose Bengal stained) and dead specimens of epibenthic Fontbotia wuellerstorfi, preferentially used in paleoceanographic reconstructions, and of endobenthic high-latitude Cassidulina neoteretis and Cassidulina reniforme from a cold methane-venting seep off northern Norway. We collected foraminiferal tests from three push cores and nine multiple cores obtained with a remotely operated vehicle and a video-guided multiple corer, respectively. All sampled sites except one control site are situated at the Håkon Mosby mud volcano (HMMV) on the Barents Sea continental slope in 1250 m water depth. At the HMMV in areas densely populated by pogonophoran tube worms, d13C values of cytoplasm-containing epibenthic F. wuellerstorfi are by up to 4.4 per mil lower than at control site, thus representing the lowest values hitherto reported for this species. Live C. neoteretis and C. reniforme reach d13C values of -7.5 and -5.5 per mil Vienna Pee Dee Belemnite (VPDB), respectively, whereas d13C values of their empty tests are higher by 4 per mil and 3 per mil. However, d13C values of empty tests are never lower than those of stained specimens, although they are still lower than empty tests from the control site. This indicates that authigenic calcite precipitates at or below the sediment surface are not significantly influencing the stable isotopic composition of foraminiferal shells. The comparatively high d13C results rather from upward convection of pore water and fluid mud during active methane venting phases at these sites. These processes mingle tests just recently calcified with older ones secreted at intermittent times of less or no methane discharge. Since cytoplasm-containing specimens of suspension feeder F. wuellerstorfi are almost exclusively found attached to pogonophores, which protrude up to 3 cm above the sediment, and d13C values of bottom-water-dissolved ... Dataset Barents Sea Northern Norway PANGAEA - Data Publisher for Earth & Environmental Science Barents Sea Norway Dee ENVELOPE(-59.767,-59.767,-62.433,-62.433) ENVELOPE(14.716667,14.751667,72.012700,71.950000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI |
spellingShingle |
AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI Mackensen, Andreas Wollenburg, Jutta E Licari, Laetitia Stable isotopic composition of bottom water and benthic foraminifera from Hakon Mosby Mud Vulcano |
topic_facet |
AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI |
description |
To investigate the use of benthic foraminifera as a means to document ancient methane release, we determined the stable isotopic composition of tests of live (Rose Bengal stained) and dead specimens of epibenthic Fontbotia wuellerstorfi, preferentially used in paleoceanographic reconstructions, and of endobenthic high-latitude Cassidulina neoteretis and Cassidulina reniforme from a cold methane-venting seep off northern Norway. We collected foraminiferal tests from three push cores and nine multiple cores obtained with a remotely operated vehicle and a video-guided multiple corer, respectively. All sampled sites except one control site are situated at the Håkon Mosby mud volcano (HMMV) on the Barents Sea continental slope in 1250 m water depth. At the HMMV in areas densely populated by pogonophoran tube worms, d13C values of cytoplasm-containing epibenthic F. wuellerstorfi are by up to 4.4 per mil lower than at control site, thus representing the lowest values hitherto reported for this species. Live C. neoteretis and C. reniforme reach d13C values of -7.5 and -5.5 per mil Vienna Pee Dee Belemnite (VPDB), respectively, whereas d13C values of their empty tests are higher by 4 per mil and 3 per mil. However, d13C values of empty tests are never lower than those of stained specimens, although they are still lower than empty tests from the control site. This indicates that authigenic calcite precipitates at or below the sediment surface are not significantly influencing the stable isotopic composition of foraminiferal shells. The comparatively high d13C results rather from upward convection of pore water and fluid mud during active methane venting phases at these sites. These processes mingle tests just recently calcified with older ones secreted at intermittent times of less or no methane discharge. Since cytoplasm-containing specimens of suspension feeder F. wuellerstorfi are almost exclusively found attached to pogonophores, which protrude up to 3 cm above the sediment, and d13C values of bottom-water-dissolved ... |
format |
Dataset |
author |
Mackensen, Andreas Wollenburg, Jutta E Licari, Laetitia |
author_facet |
Mackensen, Andreas Wollenburg, Jutta E Licari, Laetitia |
author_sort |
Mackensen, Andreas |
title |
Stable isotopic composition of bottom water and benthic foraminifera from Hakon Mosby Mud Vulcano |
title_short |
Stable isotopic composition of bottom water and benthic foraminifera from Hakon Mosby Mud Vulcano |
title_full |
Stable isotopic composition of bottom water and benthic foraminifera from Hakon Mosby Mud Vulcano |
title_fullStr |
Stable isotopic composition of bottom water and benthic foraminifera from Hakon Mosby Mud Vulcano |
title_full_unstemmed |
Stable isotopic composition of bottom water and benthic foraminifera from Hakon Mosby Mud Vulcano |
title_sort |
stable isotopic composition of bottom water and benthic foraminifera from hakon mosby mud vulcano |
publisher |
PANGAEA |
publishDate |
2006 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.834860 https://doi.org/10.1594/PANGAEA.834860 |
op_coverage |
MEDIAN LATITUDE: 71.991373 * MEDIAN LONGITUDE: 14.733712 * SOUTH-BOUND LATITUDE: 71.950000 * WEST-BOUND LONGITUDE: 14.716667 * NORTH-BOUND LATITUDE: 72.012700 * EAST-BOUND LONGITUDE: 14.751667 * DATE/TIME START: 2001-08-28T16:04:00 * DATE/TIME END: 2004-06-22T23:14:00 |
long_lat |
ENVELOPE(-59.767,-59.767,-62.433,-62.433) ENVELOPE(14.716667,14.751667,72.012700,71.950000) |
geographic |
Barents Sea Norway Dee |
geographic_facet |
Barents Sea Norway Dee |
genre |
Barents Sea Northern Norway |
genre_facet |
Barents Sea Northern Norway |
op_source |
Supplement to: Mackensen, Andreas; Wollenburg, Jutta E; Licari, Laetitia (2006): Low d13C in tests of live epibenthic and endobenthic foraminifera at a site of active methane seepage. Paleoceanography, 21(2), PA2022, https://doi.org/10.1029/2005PA001196 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.834860 https://doi.org/10.1594/PANGAEA.834860 |
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.834860 https://doi.org/10.1029/2005PA001196 |
_version_ |
1766370657401044992 |