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dc.contributor.authorFazli Khani, Hamed
dc.contributor.authorFossen, Haakon
dc.contributor.authorGawthorpe, Robert
dc.contributor.authorFaleide, Jan Inge
dc.contributor.authorBell, Rebecca E.
dc.date.accessioned2018-08-13T13:15:14Z
dc.date.available2018-08-13T13:15:14Z
dc.date.issued2017-06
dc.identifier.citationFazli Khani H, Fossen H, Gawthorpe R L, Faleide JI, Bell RE. Basement structure and its influence on the structural configuration of the northern North Sea rift. Tectonics. 2017;36(6):1151-1177eng
dc.identifier.urihttp://hdl.handle.net/1956/18051
dc.description.abstractThe northern North Sea rift basin developed on a heterogeneous crust comprising structures inherited from the Caledonian orogeny and Devonian postorogenic extension. Integrating two‐dimensional regional seismic reflection data and information from basement wells, we investigate the prerift structural configuration in the northern North Sea rift. Three seismic facies have been defined below the base rift surface: (1) relatively low‐amplitude and low‐frequency reflections, interpreted as pre‐Caledonian metasediments, Caledonian nappes, and/or Devonian clastic sediments; (2) packages of high‐amplitude dipping reflections (>500 ms thick), interpreted as basement shear zones; and (3) medium‐amplitude and high‐frequency reflections interpreted as less sheared crystalline basement of Proterozoic and Paleozoic (Caledonian) origin. Some zones of Seismic Facies 2 can be linked to onshore Devonian shear zones, whereas others are restricted to the offshore rift area. Interpreted offshore shear zones dip S, ESE, and WNW in contrast to W to NW dipping shear zones onshore West Norway. Our results indicate that Devonian strain and ductile deformation was distributed throughout the Caledonian orogenic belt from central South Norway to the Shetland Platform. Most of the Devonian basins related to this extension are, however, removed by erosion during subsequent exhumation. Basement shear zones reactivated during the rifting and locally control the location and geometry of rift depocenters, e.g., in the Stord and East Shetland basins. Prerift structures with present‐day dips >15° were reactivated, although some of the basement shear zones are displaced by rift faults regardless of their orientation relative to rift extension direction.eng
dc.language.isoengeng
dc.publisherAmerican Geophysical Unioneng
dc.rightsAttribution CC BY-NC-NDeng
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/eng
dc.titleBasement structure and its influence on the structural configuration of the northern North Sea rifteng
dc.typeJournal articleeng
dc.date.updated2018-03-06T09:57:17Z
dc.rights.holderCopyright 2017 The Author(s)eng
dc.type.versionpublishedVersioneng
bora.peerreviewedPeer reviewedeng
dc.type.documentJournal article
dc.identifier.cristinID1481521
dc.identifier.doi10.1002/2017TC004514eng
dc.source.issn0278-7407eng
dc.source.issn1944-9194eng
dc.relation.projectIDNorges forskningsråd: 223272
dc.relation.journalTectonics


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