Cold-seep macrofaunal assemblages in cores from Vestnesa Ridge, eastern Fram Strait, during the past 45000 years
Source at https://doi.org/10.33265/polar.v38.3310. Four cores from 1200 m water depth from Vestnesa Ridge on the western Svalbard margin in the eastern Fram Strait were studied for their content of fossil macro-faunas. Three of the cores were collected from a pockmark with active methane seepage, an...
Published in: | Polar Research |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Norsk Polarinstitutt
2019
|
Subjects: | |
Online Access: | https://hdl.handle.net/10037/16476 https://doi.org/10.33265/polar.v38.3310 |
id |
ftunivtroemsoe:oai:munin.uit.no:10037/16476 |
---|---|
record_format |
openpolar |
spelling |
ftunivtroemsoe:oai:munin.uit.no:10037/16476 2023-05-15T14:27:10+02:00 Cold-seep macrofaunal assemblages in cores from Vestnesa Ridge, eastern Fram Strait, during the past 45000 years Thomsen, Elsebeth Rasmussen, Tine Lander Sztybor, Kamila Hanken, Nils-Martin Tendal, Ole Secher Uchman, Alfred 2019-10-22 https://hdl.handle.net/10037/16476 https://doi.org/10.33265/polar.v38.3310 eng eng Norsk Polarinstitutt Polar Research info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ Thomsen, E., Rasmussen, T.L., Sztybor, K., Hanken, N-M., Tendal, O.S. & Uchman, A. (2019). Cold-seep macrofaunal assemblages in cores from Vestnesa Ridge, eastern Fram Strait, during the past 45000 years. Polar Research, 38 , 3310. https://doi.org/10.33265/polar.v38.3310 FRIDAID 1739557 doi:10.33265/polar.v38.3310 0800-0395 1751-8369 https://hdl.handle.net/10037/16476 openAccess VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Methane release macrofossils trace fossils foraminifera mid-late Weichselian glacial to Holocene Svalbard margin Journal article Tidsskriftartikkel Peer reviewed 2019 ftunivtroemsoe https://doi.org/10.33265/polar.v38.3310 2021-06-25T17:56:54Z Source at https://doi.org/10.33265/polar.v38.3310. Four cores from 1200 m water depth from Vestnesa Ridge on the western Svalbard margin in the eastern Fram Strait were studied for their content of fossil macro-faunas. Three of the cores were collected from a pockmark with active methane seepage, and one core (control core) was taken just outside the seepage area for comparison. Together the cores cover the last 45 000 years (mid-late Weichselian glacial, the deglaciation and the Holocene). The records show a range of influence of methane from no seepage (control core) and, although variable through time, from moderate seepage, to strong and very strong seepage. All cores have been analysed for the macrofossils >1 mm, trace fossils, planktic foraminifera, stableisotopes, geochemistry and sedimentology. The main purpose of the study is to improve our knowledge of the fossil macrofauna and past environmental changes related to the impact of methane emissions in the area. The core recovered outside the pockmark contained no fossil macrofaunas, while cores from inside the pock-mark contained chemosymbiotic bivalves, and in some cases a rich macrofauna. The faunal relationships with the sedimentary environments confirm a close con-nection between the macrofauna and the variability in influence of cold seepage, particularly seen in the occurrence of chemosymbiotic bivalves Archivesica arctica, Isorropodon nyeggaensis , potentially chemosymbiotic bivalve Rhacothyas kolgae , polychaetes. A barren zone in the core that was taken from the deepest part of the pockmark may indicate that a blow-out took place in the late glacial and the deglaciation into the early Holocene at c. 21,000–9000 years. Article in Journal/Newspaper Arctic Fram Strait Polar Research Svalbard Svalbard margin University of Tromsø: Munin Open Research Archive Svalbard Polar Research 38 0 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Methane release macrofossils trace fossils foraminifera mid-late Weichselian glacial to Holocene Svalbard margin |
spellingShingle |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Methane release macrofossils trace fossils foraminifera mid-late Weichselian glacial to Holocene Svalbard margin Thomsen, Elsebeth Rasmussen, Tine Lander Sztybor, Kamila Hanken, Nils-Martin Tendal, Ole Secher Uchman, Alfred Cold-seep macrofaunal assemblages in cores from Vestnesa Ridge, eastern Fram Strait, during the past 45000 years |
topic_facet |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Methane release macrofossils trace fossils foraminifera mid-late Weichselian glacial to Holocene Svalbard margin |
description |
Source at https://doi.org/10.33265/polar.v38.3310. Four cores from 1200 m water depth from Vestnesa Ridge on the western Svalbard margin in the eastern Fram Strait were studied for their content of fossil macro-faunas. Three of the cores were collected from a pockmark with active methane seepage, and one core (control core) was taken just outside the seepage area for comparison. Together the cores cover the last 45 000 years (mid-late Weichselian glacial, the deglaciation and the Holocene). The records show a range of influence of methane from no seepage (control core) and, although variable through time, from moderate seepage, to strong and very strong seepage. All cores have been analysed for the macrofossils >1 mm, trace fossils, planktic foraminifera, stableisotopes, geochemistry and sedimentology. The main purpose of the study is to improve our knowledge of the fossil macrofauna and past environmental changes related to the impact of methane emissions in the area. The core recovered outside the pockmark contained no fossil macrofaunas, while cores from inside the pock-mark contained chemosymbiotic bivalves, and in some cases a rich macrofauna. The faunal relationships with the sedimentary environments confirm a close con-nection between the macrofauna and the variability in influence of cold seepage, particularly seen in the occurrence of chemosymbiotic bivalves Archivesica arctica, Isorropodon nyeggaensis , potentially chemosymbiotic bivalve Rhacothyas kolgae , polychaetes. A barren zone in the core that was taken from the deepest part of the pockmark may indicate that a blow-out took place in the late glacial and the deglaciation into the early Holocene at c. 21,000–9000 years. |
format |
Article in Journal/Newspaper |
author |
Thomsen, Elsebeth Rasmussen, Tine Lander Sztybor, Kamila Hanken, Nils-Martin Tendal, Ole Secher Uchman, Alfred |
author_facet |
Thomsen, Elsebeth Rasmussen, Tine Lander Sztybor, Kamila Hanken, Nils-Martin Tendal, Ole Secher Uchman, Alfred |
author_sort |
Thomsen, Elsebeth |
title |
Cold-seep macrofaunal assemblages in cores from Vestnesa Ridge, eastern Fram Strait, during the past 45000 years |
title_short |
Cold-seep macrofaunal assemblages in cores from Vestnesa Ridge, eastern Fram Strait, during the past 45000 years |
title_full |
Cold-seep macrofaunal assemblages in cores from Vestnesa Ridge, eastern Fram Strait, during the past 45000 years |
title_fullStr |
Cold-seep macrofaunal assemblages in cores from Vestnesa Ridge, eastern Fram Strait, during the past 45000 years |
title_full_unstemmed |
Cold-seep macrofaunal assemblages in cores from Vestnesa Ridge, eastern Fram Strait, during the past 45000 years |
title_sort |
cold-seep macrofaunal assemblages in cores from vestnesa ridge, eastern fram strait, during the past 45000 years |
publisher |
Norsk Polarinstitutt |
publishDate |
2019 |
url |
https://hdl.handle.net/10037/16476 https://doi.org/10.33265/polar.v38.3310 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
Arctic Fram Strait Polar Research Svalbard Svalbard margin |
genre_facet |
Arctic Fram Strait Polar Research Svalbard Svalbard margin |
op_relation |
Polar Research info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ Thomsen, E., Rasmussen, T.L., Sztybor, K., Hanken, N-M., Tendal, O.S. & Uchman, A. (2019). Cold-seep macrofaunal assemblages in cores from Vestnesa Ridge, eastern Fram Strait, during the past 45000 years. Polar Research, 38 , 3310. https://doi.org/10.33265/polar.v38.3310 FRIDAID 1739557 doi:10.33265/polar.v38.3310 0800-0395 1751-8369 https://hdl.handle.net/10037/16476 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.33265/polar.v38.3310 |
container_title |
Polar Research |
container_volume |
38 |
container_issue |
0 |
_version_ |
1766300772719394816 |