Crustal fragmentation, magmatism, and the diachronous opening of the Norwegian-Greenland Sea
The Norwegian-Greenland Sea (NGS) in the NE Atlantic comprises diverse tectonic regimes and structural features including sub-oceanic basins of different ages, microcontinents and conjugate volcanic passive margins, between the Greenland-Iceland-Faroe Ridge in the south and the Arctic Ocean in the n...
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Uppsala universitet, Geofysik
2020
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ftuppsalauniv:oai:DiVA.org:uu-399944 2023-05-15T15:15:01+02:00 Crustal fragmentation, magmatism, and the diachronous opening of the Norwegian-Greenland Sea Gernigon, Laurent Franke, Dieter Geoffroy, Laurent Schiffer, Christian Foulger, Gillian R. Stoker, Martyn 2020 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-399944 https://doi.org/10.1016/j.earscirev.2019.04.011 eng eng Uppsala universitet, Geofysik Geological Survey of Norway (NGU), Trondheim, Norway Federal Institute for Geosciences and Natural Resources (BGR), Hannover, Germany Institut Universitaire Européen de la Mer (IUEM), Plouzané, France Dept. Earth Sciences, Durham University, Science Laboratories, South Road, Durham DH1 3LE, UK Australian School of Petroleum, University of Adelaide, Adelaide, SA 5005, Australia Earth-Science Reviews, 0012-8252, 2020, 206, http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-399944 doi:10.1016/j.earscirev.2019.04.011 ISI:000555783600006 info:eu-repo/semantics/openAccess Geosciences Multidisciplinary Multidisciplinär geovetenskap Article, review/survey info:eu-repo/semantics/article text 2020 ftuppsalauniv https://doi.org/10.1016/j.earscirev.2019.04.011 2023-02-23T21:53:31Z The Norwegian-Greenland Sea (NGS) in the NE Atlantic comprises diverse tectonic regimes and structural features including sub-oceanic basins of different ages, microcontinents and conjugate volcanic passive margins, between the Greenland-Iceland-Faroe Ridge in the south and the Arctic Ocean in the north. We summarize the tectonic evolution of the area and highlight the complexity of the conjugate volcanic and rifted margins up to lithospheric rupture in the NGS. The highly magmatic breakup in the NGS was diachronous and initiated as isolated and segmented seafloor spreading centres. The early seafloor spreading system, initiating in the Early Eocene, gradually developed into atypical propagating systems with subsequent breakup(s) following a step-by-step thinning and rupture of the lithosphere. Newly-formed spreading axes propagated initially towards local Euler poles, died out, migrated or jumped laterally, changed their propagating orientation or eventually bifurcated. With the Palaeocene onset of volcanic rifting, breakup-related intrusions may have localized deformation and guided the final axis of breakup along distal regions already affected by pre-magmatic Late Cretaceous-Palaeocene and older extensional phases. The final line of lithospheric breakup may have been controlled by highly oblique extension, associated plate shearing and/or melt intrusions before and during Seaward Dipping Reflectors (SDRs) formation. The Inner SDRs and accompanying volcanics formed preferentially either on thick continental ribbons and/or moderately thinned continental crust. The segmented and diachronic evolution of the NGS spreading activity is also reflected by a time delay of 1–2 Myrs expected between the emplacement of the SDRs imaged at the Møre and Vøring margins. This complex evolution was followed by several prominent changes in spreading kinematics, the first occurring in the Middle Eocene at 47 Ma–magnetic chron C21r. Inheritance and magmatism likely influenced the complex rift reorganization resulting in the final ... Article in Journal/Newspaper Arctic Arctic Ocean Greenland Greenland Sea Iceland Uppsala University: Publications (DiVA) Arctic Arctic Ocean Greenland Earth-Science Reviews 206 102839 |
institution |
Open Polar |
collection |
Uppsala University: Publications (DiVA) |
op_collection_id |
ftuppsalauniv |
language |
English |
topic |
Geosciences Multidisciplinary Multidisciplinär geovetenskap |
spellingShingle |
Geosciences Multidisciplinary Multidisciplinär geovetenskap Gernigon, Laurent Franke, Dieter Geoffroy, Laurent Schiffer, Christian Foulger, Gillian R. Stoker, Martyn Crustal fragmentation, magmatism, and the diachronous opening of the Norwegian-Greenland Sea |
topic_facet |
Geosciences Multidisciplinary Multidisciplinär geovetenskap |
description |
The Norwegian-Greenland Sea (NGS) in the NE Atlantic comprises diverse tectonic regimes and structural features including sub-oceanic basins of different ages, microcontinents and conjugate volcanic passive margins, between the Greenland-Iceland-Faroe Ridge in the south and the Arctic Ocean in the north. We summarize the tectonic evolution of the area and highlight the complexity of the conjugate volcanic and rifted margins up to lithospheric rupture in the NGS. The highly magmatic breakup in the NGS was diachronous and initiated as isolated and segmented seafloor spreading centres. The early seafloor spreading system, initiating in the Early Eocene, gradually developed into atypical propagating systems with subsequent breakup(s) following a step-by-step thinning and rupture of the lithosphere. Newly-formed spreading axes propagated initially towards local Euler poles, died out, migrated or jumped laterally, changed their propagating orientation or eventually bifurcated. With the Palaeocene onset of volcanic rifting, breakup-related intrusions may have localized deformation and guided the final axis of breakup along distal regions already affected by pre-magmatic Late Cretaceous-Palaeocene and older extensional phases. The final line of lithospheric breakup may have been controlled by highly oblique extension, associated plate shearing and/or melt intrusions before and during Seaward Dipping Reflectors (SDRs) formation. The Inner SDRs and accompanying volcanics formed preferentially either on thick continental ribbons and/or moderately thinned continental crust. The segmented and diachronic evolution of the NGS spreading activity is also reflected by a time delay of 1–2 Myrs expected between the emplacement of the SDRs imaged at the Møre and Vøring margins. This complex evolution was followed by several prominent changes in spreading kinematics, the first occurring in the Middle Eocene at 47 Ma–magnetic chron C21r. Inheritance and magmatism likely influenced the complex rift reorganization resulting in the final ... |
format |
Article in Journal/Newspaper |
author |
Gernigon, Laurent Franke, Dieter Geoffroy, Laurent Schiffer, Christian Foulger, Gillian R. Stoker, Martyn |
author_facet |
Gernigon, Laurent Franke, Dieter Geoffroy, Laurent Schiffer, Christian Foulger, Gillian R. Stoker, Martyn |
author_sort |
Gernigon, Laurent |
title |
Crustal fragmentation, magmatism, and the diachronous opening of the Norwegian-Greenland Sea |
title_short |
Crustal fragmentation, magmatism, and the diachronous opening of the Norwegian-Greenland Sea |
title_full |
Crustal fragmentation, magmatism, and the diachronous opening of the Norwegian-Greenland Sea |
title_fullStr |
Crustal fragmentation, magmatism, and the diachronous opening of the Norwegian-Greenland Sea |
title_full_unstemmed |
Crustal fragmentation, magmatism, and the diachronous opening of the Norwegian-Greenland Sea |
title_sort |
crustal fragmentation, magmatism, and the diachronous opening of the norwegian-greenland sea |
publisher |
Uppsala universitet, Geofysik |
publishDate |
2020 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-399944 https://doi.org/10.1016/j.earscirev.2019.04.011 |
geographic |
Arctic Arctic Ocean Greenland |
geographic_facet |
Arctic Arctic Ocean Greenland |
genre |
Arctic Arctic Ocean Greenland Greenland Sea Iceland |
genre_facet |
Arctic Arctic Ocean Greenland Greenland Sea Iceland |
op_relation |
Earth-Science Reviews, 0012-8252, 2020, 206, http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-399944 doi:10.1016/j.earscirev.2019.04.011 ISI:000555783600006 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.earscirev.2019.04.011 |
container_title |
Earth-Science Reviews |
container_volume |
206 |
container_start_page |
102839 |
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1766345402215301120 |