Methane hydrate recycling offshore of Mauritania probably after the last glacial maximum.
To what extent methane liberated from marine hydrate will enter the ocean during a warmer world is unknown. Although methane release due to hydrate dissociation has been modelled, it is unclear whether or not methane will reach the seafloor during a warmer world and therefore contribute to oceanic a...
Published in: | Marine and Petroleum Geology |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Elsevier
2017
|
Subjects: | |
Online Access: | http://dro.dur.ac.uk/22129/ http://dro.dur.ac.uk/22129/1/22129.pdf https://doi.org/10.1016/j.marpetgeo.2017.04.007 |
id |
ftunivdurham:oai:dro.dur.ac.uk.OAI2:22129 |
---|---|
record_format |
openpolar |
spelling |
ftunivdurham:oai:dro.dur.ac.uk.OAI2:22129 2023-05-15T16:39:08+02:00 Methane hydrate recycling offshore of Mauritania probably after the last glacial maximum. Li, Ang Davies, Richard J. Mathias, Simon 2017-06-01 application/pdf http://dro.dur.ac.uk/22129/ http://dro.dur.ac.uk/22129/1/22129.pdf https://doi.org/10.1016/j.marpetgeo.2017.04.007 unknown Elsevier dro:22129 issn:0264-8172 doi:10.1016/j.marpetgeo.2017.04.007 http://dro.dur.ac.uk/22129/ https://doi.org/10.1016/j.marpetgeo.2017.04.007 http://dro.dur.ac.uk/22129/1/22129.pdf © 2017 This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ CC-BY-NC-ND Marine and petroleum geology, 2017, Vol.84, pp.323-331 [Peer Reviewed Journal] Article PeerReviewed 2017 ftunivdurham https://doi.org/10.1016/j.marpetgeo.2017.04.007 2020-06-04T22:23:52Z To what extent methane liberated from marine hydrate will enter the ocean during a warmer world is unknown. Although methane release due to hydrate dissociation has been modelled, it is unclear whether or not methane will reach the seafloor during a warmer world and therefore contribute to oceanic and atmospheric budgets. Here we show, using a new three-dimensional (3-D) seismic dataset, that some hydrate deposits surround the gas chimneys passing through the HSZ. Bottom water warming since the last glacial maximum (LGM) is interpreted to cause hydrate dissociation but critically some of the released methane was not vented to the ocean. The released gas caused seal failure and free gas entered the hydrate stability zone (HSZ) through vertical gas chimneys to where new hydrate accumulations formed. This process is a new evidence for methane recycling and could account in part for the lack of methane in ice core records that cover warming events during the late Quaternary. This research provides new insight into how methane could be recycled rather than vented during a warmer world. Article in Journal/Newspaper ice core Methane hydrate Durham University: Durham Research Online Marine and Petroleum Geology 84 323 331 |
institution |
Open Polar |
collection |
Durham University: Durham Research Online |
op_collection_id |
ftunivdurham |
language |
unknown |
description |
To what extent methane liberated from marine hydrate will enter the ocean during a warmer world is unknown. Although methane release due to hydrate dissociation has been modelled, it is unclear whether or not methane will reach the seafloor during a warmer world and therefore contribute to oceanic and atmospheric budgets. Here we show, using a new three-dimensional (3-D) seismic dataset, that some hydrate deposits surround the gas chimneys passing through the HSZ. Bottom water warming since the last glacial maximum (LGM) is interpreted to cause hydrate dissociation but critically some of the released methane was not vented to the ocean. The released gas caused seal failure and free gas entered the hydrate stability zone (HSZ) through vertical gas chimneys to where new hydrate accumulations formed. This process is a new evidence for methane recycling and could account in part for the lack of methane in ice core records that cover warming events during the late Quaternary. This research provides new insight into how methane could be recycled rather than vented during a warmer world. |
format |
Article in Journal/Newspaper |
author |
Li, Ang Davies, Richard J. Mathias, Simon |
spellingShingle |
Li, Ang Davies, Richard J. Mathias, Simon Methane hydrate recycling offshore of Mauritania probably after the last glacial maximum. |
author_facet |
Li, Ang Davies, Richard J. Mathias, Simon |
author_sort |
Li, Ang |
title |
Methane hydrate recycling offshore of Mauritania probably after the last glacial maximum. |
title_short |
Methane hydrate recycling offshore of Mauritania probably after the last glacial maximum. |
title_full |
Methane hydrate recycling offshore of Mauritania probably after the last glacial maximum. |
title_fullStr |
Methane hydrate recycling offshore of Mauritania probably after the last glacial maximum. |
title_full_unstemmed |
Methane hydrate recycling offshore of Mauritania probably after the last glacial maximum. |
title_sort |
methane hydrate recycling offshore of mauritania probably after the last glacial maximum. |
publisher |
Elsevier |
publishDate |
2017 |
url |
http://dro.dur.ac.uk/22129/ http://dro.dur.ac.uk/22129/1/22129.pdf https://doi.org/10.1016/j.marpetgeo.2017.04.007 |
genre |
ice core Methane hydrate |
genre_facet |
ice core Methane hydrate |
op_source |
Marine and petroleum geology, 2017, Vol.84, pp.323-331 [Peer Reviewed Journal] |
op_relation |
dro:22129 issn:0264-8172 doi:10.1016/j.marpetgeo.2017.04.007 http://dro.dur.ac.uk/22129/ https://doi.org/10.1016/j.marpetgeo.2017.04.007 http://dro.dur.ac.uk/22129/1/22129.pdf |
op_rights |
© 2017 This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.marpetgeo.2017.04.007 |
container_title |
Marine and Petroleum Geology |
container_volume |
84 |
container_start_page |
323 |
op_container_end_page |
331 |
_version_ |
1766029472072466432 |