dc.contributor.author | Kristoffersen, Yngve | |
dc.contributor.author | Hall, John K. | |
dc.contributor.author | Nilsen, Espen Harris | |
dc.date.accessioned | 2023-03-03T09:06:13Z | |
dc.date.available | 2023-03-03T09:06:13Z | |
dc.date.created | 2022-05-13T08:32:04Z | |
dc.date.issued | 2022 | |
dc.identifier.issn | 0264-8172 | |
dc.identifier.uri | https://hdl.handle.net/11250/3055632 | |
dc.description.abstract | We have used a hovercraft platform drifting with the sea ice to acquire the first digitally recorded seismic reflection data transects across the Canada/Greenland (89°N-85°N) section of the Lomonosov Ridge, central Arctic Ocean. The flat-lying, laterally uniform Cenozoic sediment package on top of the ridge at 87°N, 60° W shows at least four sites with local seismic amplitude anomalies. The common feature is a column (<600 m wide) of partly discontinuous or chaotic bright reflection events at the center of a <1.5 km wide dome (amplitude <25 m) terminating at the seabed in a 8–12 m deep depression. The amplitude anomalies are interpreted as gas-charged fluid escape pipes marked by a pockmark at the seabed. Gas and fluids introduced from below have mobilized the overlying high porosity, low density Eocene bio-siliceous ooze causing the doming. The gas and fluids appear to originate from the top of rotated fault blocks and sub-basalt sediments of Mesozoic or older age deposited when the Lomonosov Ridge was part of the pre-Late Cretaceous continental margin north of Franz Josef Land. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Elsevier | en_US |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Sediment deformation atop the Lomonosov Ridge, central Arctic Ocean: Evidence for gas-charged sediment mobilization | en_US |
dc.type | Journal article | en_US |
dc.type | Peer reviewed | en_US |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | Copyright 2022 The Authors | en_US |
dc.source.articlenumber | 105555 | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |
dc.identifier.doi | 10.1016/j.marpetgeo.2022.105555 | |
dc.identifier.cristin | 2024164 | |
dc.source.journal | Marine and Petroleum Geology | en_US |
dc.identifier.citation | Marine and Petroleum Geology. 2022, 138, 105555. | en_US |
dc.source.volume | 138 | en_US |