Foraminiferal δ18O reveals gas hydrate dissociation in Arctic and North Atlantic ocean sediments
Paleoceanographic investigations in the Arctic and north Atlantic are crucial to understanding past and current climate change, in particular considering amounts of pressure-temperature sensitive gas stored in marine sediments of the region. Many paleoceanographic studies are based on foraminiferal...
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Online Access: | https://hdl.handle.net/10037/17990 https://doi.org/10.1007/s00367-019-00635-6 |
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ftunivtroemsoe:oai:munin.uit.no:10037/17990 2023-05-15T14:24:45+02:00 Foraminiferal δ18O reveals gas hydrate dissociation in Arctic and North Atlantic ocean sediments Dessandier, Pierre-Antoine Borrelli, Chiara Yao, Haoyi Sauer, Simone Hong, Wei-Li Panieri, Giuliana 2020-01-07 https://hdl.handle.net/10037/17990 https://doi.org/10.1007/s00367-019-00635-6 eng eng Springer Nature Geo-Marine Letters info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ info:eu-repo/grantAgreement/RCN/PETROMAKS2/255150/Norway/Norwegian margin fluid systems and methane- derived carbonate crusts - Recent scientific advances in service of petroleum exploration// Dessandier P, Borrelli C, Yao H, Sauer S, Hong H, Panieri G. Foraminiferal δ18O reveals gas hydrate dissociation in Arctic and North Atlantic ocean sediments. Geo-Marine Letters. 2020 FRIDAID 1768752 doi:10.1007/s00367-019-00635-6 0276-0460 1432-1157 https://hdl.handle.net/10037/17990 openAccess Copyright 2020 Springer-Verlag GmbH Germany, part of Springer Nature VDP::Mathematics and natural science: 400::Geosciences: 450::Stratigraphy and paleontology: 461 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Stratigrafi og paleontologi: 461 Journal article Tidsskriftartikkel Peer reviewed acceptedVersion 2020 ftunivtroemsoe https://doi.org/10.1007/s00367-019-00635-6 2021-06-25T17:57:04Z Paleoceanographic investigations in the Arctic and north Atlantic are crucial to understanding past and current climate change, in particular considering amounts of pressure-temperature sensitive gas stored in marine sediments of the region. Many paleoceanographic studies are based on foraminiferal oxygen and carbon stable isotope compositions (δ 18 O, δ 13 C) from either planktonic specimens, benthic specimens or both. However, in seafloor regions promixal to high upward methane fluxes, such as where seafloor gas emission and shallow gas hydrate-bearing sediment occur, foraminiferal δ 18 O and δ 13 C display a wide range of values. Our study focuses on foraminiferal stable isotope signatures in shallow sediment at core sites in the Arctic and North Atlantic affected by significant upward flow of methane. This includes cores with shallow sulfate methane transitions that are adjacent to seeps and containing gas hydrate. We place emphasis on potential effects due to gas hydrate dissociation and diagenesis. Gas hydrate dissociation is known to increase pore-water δ 18 O, but our results indicate that precipitation of methane-derived authigenic carbonate (MDAC) also affects the foraminiferal δ 18 O of both planktonic and benthic species. In addition to this post-depositional overprint, we investigate the potential bias of the stable isotope record due to ontogenetic effects. Our data show that the size fraction does not impact the isotopic signal of planktonic and benthic foraminifera. Article in Journal/Newspaper Arctic Arctic Climate change Foraminifera* North Atlantic University of Tromsø: Munin Open Research Archive Arctic Geo-Marine Letters 40 4 507 523 |
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::Stratigraphy and paleontology: 461 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Stratigrafi og paleontologi: 461 |
spellingShingle |
VDP::Mathematics and natural science: 400::Geosciences: 450::Stratigraphy and paleontology: 461 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Stratigrafi og paleontologi: 461 Dessandier, Pierre-Antoine Borrelli, Chiara Yao, Haoyi Sauer, Simone Hong, Wei-Li Panieri, Giuliana Foraminiferal δ18O reveals gas hydrate dissociation in Arctic and North Atlantic ocean sediments |
topic_facet |
VDP::Mathematics and natural science: 400::Geosciences: 450::Stratigraphy and paleontology: 461 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Stratigrafi og paleontologi: 461 |
description |
Paleoceanographic investigations in the Arctic and north Atlantic are crucial to understanding past and current climate change, in particular considering amounts of pressure-temperature sensitive gas stored in marine sediments of the region. Many paleoceanographic studies are based on foraminiferal oxygen and carbon stable isotope compositions (δ 18 O, δ 13 C) from either planktonic specimens, benthic specimens or both. However, in seafloor regions promixal to high upward methane fluxes, such as where seafloor gas emission and shallow gas hydrate-bearing sediment occur, foraminiferal δ 18 O and δ 13 C display a wide range of values. Our study focuses on foraminiferal stable isotope signatures in shallow sediment at core sites in the Arctic and North Atlantic affected by significant upward flow of methane. This includes cores with shallow sulfate methane transitions that are adjacent to seeps and containing gas hydrate. We place emphasis on potential effects due to gas hydrate dissociation and diagenesis. Gas hydrate dissociation is known to increase pore-water δ 18 O, but our results indicate that precipitation of methane-derived authigenic carbonate (MDAC) also affects the foraminiferal δ 18 O of both planktonic and benthic species. In addition to this post-depositional overprint, we investigate the potential bias of the stable isotope record due to ontogenetic effects. Our data show that the size fraction does not impact the isotopic signal of planktonic and benthic foraminifera. |
format |
Article in Journal/Newspaper |
author |
Dessandier, Pierre-Antoine Borrelli, Chiara Yao, Haoyi Sauer, Simone Hong, Wei-Li Panieri, Giuliana |
author_facet |
Dessandier, Pierre-Antoine Borrelli, Chiara Yao, Haoyi Sauer, Simone Hong, Wei-Li Panieri, Giuliana |
author_sort |
Dessandier, Pierre-Antoine |
title |
Foraminiferal δ18O reveals gas hydrate dissociation in Arctic and North Atlantic ocean sediments |
title_short |
Foraminiferal δ18O reveals gas hydrate dissociation in Arctic and North Atlantic ocean sediments |
title_full |
Foraminiferal δ18O reveals gas hydrate dissociation in Arctic and North Atlantic ocean sediments |
title_fullStr |
Foraminiferal δ18O reveals gas hydrate dissociation in Arctic and North Atlantic ocean sediments |
title_full_unstemmed |
Foraminiferal δ18O reveals gas hydrate dissociation in Arctic and North Atlantic ocean sediments |
title_sort |
foraminiferal δ18o reveals gas hydrate dissociation in arctic and north atlantic ocean sediments |
publisher |
Springer Nature |
publishDate |
2020 |
url |
https://hdl.handle.net/10037/17990 https://doi.org/10.1007/s00367-019-00635-6 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Climate change Foraminifera* North Atlantic |
genre_facet |
Arctic Arctic Climate change Foraminifera* North Atlantic |
op_relation |
Geo-Marine Letters info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ info:eu-repo/grantAgreement/RCN/PETROMAKS2/255150/Norway/Norwegian margin fluid systems and methane- derived carbonate crusts - Recent scientific advances in service of petroleum exploration// Dessandier P, Borrelli C, Yao H, Sauer S, Hong H, Panieri G. Foraminiferal δ18O reveals gas hydrate dissociation in Arctic and North Atlantic ocean sediments. Geo-Marine Letters. 2020 FRIDAID 1768752 doi:10.1007/s00367-019-00635-6 0276-0460 1432-1157 https://hdl.handle.net/10037/17990 |
op_rights |
openAccess Copyright 2020 Springer-Verlag GmbH Germany, part of Springer Nature |
op_doi |
https://doi.org/10.1007/s00367-019-00635-6 |
container_title |
Geo-Marine Letters |
container_volume |
40 |
container_issue |
4 |
container_start_page |
507 |
op_container_end_page |
523 |
_version_ |
1766297214038048768 |