Shaking and splashing—A case study of far-field effects of the Mjølnir asteroid impact on depositional environments in the Barents Sea
The Mjølnir impact crater in the Norwegian Barents Sea features among the 20 largest impact craters listed in the Earth Impact Database. The impact is dated to 142 ± 2.6 Ma, corresponding closely to the Jurassic/Cretaceous boundary in the Boreal stratigraphy. Multidisciplinary studies carried out ov...
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ftoslouniv:oai:www.duo.uio.no:10852/97946 2024-09-30T14:32:52+00:00 Shaking and splashing—A case study of far-field effects of the Mjølnir asteroid impact on depositional environments in the Barents Sea ENEngelskEnglishShaking and splashing—A case study of far-field effects of the Mjølnir asteroid impact on depositional environments in the Barents Sea Bruhn, Rikke Nagy, Jenø Smelror, Morten Dypvik, Henning Glimsdal, Sylfest Pegrum, Richard Cavalli, Carlo 2022-11-03T15:26:35Z http://hdl.handle.net/10852/97946 https://doi.org/10.1111/bre.12725 EN eng Bruhn, Rikke Nagy, Jenø Smelror, Morten Dypvik, Henning Glimsdal, Sylfest Pegrum, Richard Cavalli, Carlo . Shaking and splashing—A case study of far-field effects of the Mjølnir asteroid impact on depositional environments in the Barents Sea. Basin Research. 2022 http://hdl.handle.net/10852/97946 2068793 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Basin Research&rft.volume=&rft.spage=&rft.date=2022 Basin Research 0 https://doi.org/10.1111/bre.12725 Attribution-NonCommercial 4.0 International https://creativecommons.org/licenses/by-nc/4.0/ 0950-091X Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2022 ftoslouniv https://doi.org/10.1111/bre.12725 2024-09-12T05:44:05Z The Mjølnir impact crater in the Norwegian Barents Sea features among the 20 largest impact craters listed in the Earth Impact Database. The impact is dated to 142 ± 2.6 Ma, corresponding closely to the Jurassic/Cretaceous boundary in the Boreal stratigraphy. Multidisciplinary studies carried out over the last three decades have suggested that the up to 40 km wide crater was created by a 1–3 km diameter impactor colliding with a shallow epicontinental sea, causing regional havoc and a regional ecological crisis that followed in its wake. Only minor evidence for the consequences of the impact for the surrounding depositional basins has been documented so far. This study describes a large submarine slump penetrated by hydrocarbon exploration well 7121/9-1, located in the southern Hammerfest Basin and approximately 350 km away from the impact site. The slump is dated by a black shale drape, which contains characteristic impact-related biotic assemblages and potential ejecta material. This precise dating enables us to associate the slump with large-scale fault movements and footwall collapse along the basin-bounding Troms-Finnmark Fault Complex, which we conclude were caused by shock waves from the Mjølnir impact and the passage of associated tsunami trains. The draping black shale is interpreted to represent significant reworking of material from the contemporary seabed by tsunamis and currents set up by the impact. Article in Journal/Newspaper Barents Sea Finnmark Hammerfest Hammerfest Basin Finnmark Troms Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Barents Sea Basin Research 35 2 620 641 |
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Open Polar |
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Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
description |
The Mjølnir impact crater in the Norwegian Barents Sea features among the 20 largest impact craters listed in the Earth Impact Database. The impact is dated to 142 ± 2.6 Ma, corresponding closely to the Jurassic/Cretaceous boundary in the Boreal stratigraphy. Multidisciplinary studies carried out over the last three decades have suggested that the up to 40 km wide crater was created by a 1–3 km diameter impactor colliding with a shallow epicontinental sea, causing regional havoc and a regional ecological crisis that followed in its wake. Only minor evidence for the consequences of the impact for the surrounding depositional basins has been documented so far. This study describes a large submarine slump penetrated by hydrocarbon exploration well 7121/9-1, located in the southern Hammerfest Basin and approximately 350 km away from the impact site. The slump is dated by a black shale drape, which contains characteristic impact-related biotic assemblages and potential ejecta material. This precise dating enables us to associate the slump with large-scale fault movements and footwall collapse along the basin-bounding Troms-Finnmark Fault Complex, which we conclude were caused by shock waves from the Mjølnir impact and the passage of associated tsunami trains. The draping black shale is interpreted to represent significant reworking of material from the contemporary seabed by tsunamis and currents set up by the impact. |
format |
Article in Journal/Newspaper |
author |
Bruhn, Rikke Nagy, Jenø Smelror, Morten Dypvik, Henning Glimsdal, Sylfest Pegrum, Richard Cavalli, Carlo |
spellingShingle |
Bruhn, Rikke Nagy, Jenø Smelror, Morten Dypvik, Henning Glimsdal, Sylfest Pegrum, Richard Cavalli, Carlo Shaking and splashing—A case study of far-field effects of the Mjølnir asteroid impact on depositional environments in the Barents Sea |
author_facet |
Bruhn, Rikke Nagy, Jenø Smelror, Morten Dypvik, Henning Glimsdal, Sylfest Pegrum, Richard Cavalli, Carlo |
author_sort |
Bruhn, Rikke |
title |
Shaking and splashing—A case study of far-field effects of the Mjølnir asteroid impact on depositional environments in the Barents Sea |
title_short |
Shaking and splashing—A case study of far-field effects of the Mjølnir asteroid impact on depositional environments in the Barents Sea |
title_full |
Shaking and splashing—A case study of far-field effects of the Mjølnir asteroid impact on depositional environments in the Barents Sea |
title_fullStr |
Shaking and splashing—A case study of far-field effects of the Mjølnir asteroid impact on depositional environments in the Barents Sea |
title_full_unstemmed |
Shaking and splashing—A case study of far-field effects of the Mjølnir asteroid impact on depositional environments in the Barents Sea |
title_sort |
shaking and splashing—a case study of far-field effects of the mjølnir asteroid impact on depositional environments in the barents sea |
publishDate |
2022 |
url |
http://hdl.handle.net/10852/97946 https://doi.org/10.1111/bre.12725 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea Finnmark Hammerfest Hammerfest Basin Finnmark Troms |
genre_facet |
Barents Sea Finnmark Hammerfest Hammerfest Basin Finnmark Troms |
op_source |
0950-091X |
op_relation |
Bruhn, Rikke Nagy, Jenø Smelror, Morten Dypvik, Henning Glimsdal, Sylfest Pegrum, Richard Cavalli, Carlo . Shaking and splashing—A case study of far-field effects of the Mjølnir asteroid impact on depositional environments in the Barents Sea. Basin Research. 2022 http://hdl.handle.net/10852/97946 2068793 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Basin Research&rft.volume=&rft.spage=&rft.date=2022 Basin Research 0 https://doi.org/10.1111/bre.12725 |
op_rights |
Attribution-NonCommercial 4.0 International https://creativecommons.org/licenses/by-nc/4.0/ |
op_doi |
https://doi.org/10.1111/bre.12725 |
container_title |
Basin Research |
container_volume |
35 |
container_issue |
2 |
container_start_page |
620 |
op_container_end_page |
641 |
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1811636937967009792 |