dc.contributor.author | Stokke, Ella Wulfsberg | |
dc.contributor.author | Gasser, Deta | |
dc.contributor.author | Dalslåen, Bjørgunn Heggem | |
dc.contributor.author | Grenne, Tor | |
dc.coverage.spatial | Norway | nb_NO |
dc.date.accessioned | 2019-02-05T11:19:07Z | |
dc.date.available | 2019-02-05T11:19:07Z | |
dc.date.created | 2018-04-23T13:41:36Z | |
dc.date.issued | 2018 | |
dc.identifier.citation | Stokke, E. W., Gasser, D., Dalslåen, B. H., & Grenne, T. (2018). Tectonic evolution of syn- to late-orogenic sedimentary–volcanic basins in the central Norwegian Caledonides. Journal of the Geological Society, 175(4), 605-618. | nb_NO |
dc.identifier.issn | 0016-7649 | |
dc.identifier.uri | http://hdl.handle.net/11250/2583909 | |
dc.description | Author's accepted version (post-print). | |
dc.description.abstract | We present new structural, geochemical and U–Pb zircon data from syn- to late-orogenic sedimentary–volcanic basins in the southwestern part of the Trondheim Nappe Complex, central Norwegian Caledonides. In this area, a succession of enriched mid-ocean ridge basalt type metabasalt, jasper, ribbon chert with associated sandstone and conglomerate, and green siltstone is interpreted to represent volcanism and sedimentation in a hitherto little-known spreading-dominated tectonic environment. This environment is different from the suprasubduction-zone ophiolite setting dominating the Iapetus rock record elsewhere in the Scandinavian Caledonides. This volcanic and sedimentary succession was overturned and isoclinally folded in a pre-427 Ma orogenic phase. Post-427 Ma cross-bedded sandstones were deposited on the eroded surface of the previously deformed rocks, representing a rare example of a late Silurian or younger sedimentary basin within the Scandinavian Caledonides. The cross-bedded sandstones are intercalated with and/or overlain by post-427 Ma intermediate volcanic or subvolcanic rocks of calc-alkaline composition, representing a hitherto unknown volcanic phase within the Trondheim Nappe Complex and elsewhere within the Scandinavian Caledonides. Their particular geochemical signature could be the result of late-stage subduction-zone volcanism just prior to the onset of continent–continent collision between Baltica and Laurentia, or much younger post-collisional extensional melting with inherited subduction signatures. | |
dc.description.sponsorship | We present new structural, geochemical and U–Pb zircon data from syn- to late-orogenic sedimentary–volcanic basins in the southwestern part of the Trondheim Nappe Complex, central Norwegian Caledonides. In this area, a succession of enriched mid-ocean ridge basalt type metabasalt, jasper, ribbon chert with associated sandstone and conglomerate, and green siltstone is interpreted to represent volcanism and sedimentation in a hitherto little-known spreading-dominated tectonic environment. This environment is different from the suprasubduction-zone ophiolite setting dominating the Iapetus rock record elsewhere in the Scandinavian Caledonides. This volcanic and sedimentary succession was overturned and isoclinally folded in a pre-427 Ma orogenic phase. Post-427 Ma cross-bedded sandstones were deposited on the eroded surface of the previously deformed rocks, representing a rare example of a late Silurian or younger sedimentary basin within the Scandinavian Caledonides. The cross-bedded sandstones are intercalated with and/or overlain by post-427 Ma intermediate volcanic or subvolcanic rocks of calc-alkaline composition, representing a hitherto unknown volcanic phase within the Trondheim Nappe Complex and elsewhere within the Scandinavian Caledonides. Their particular geochemical signature could be the result of late-stage subduction-zone volcanism just prior to the onset of continent–continent collision between Baltica and Laurentia, or much younger post-collisional extensional melting with inherited subduction signatures. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | Geological Society of London | nb_NO |
dc.title | Tectonic evolution of syn- to late-orogenic sedimentary- volcanic basins in the central Norwegian Caledonides | nb_NO |
dc.title.alternative | Tectonic evolution of Dugurdsknappen | nb_NO |
dc.type | Journal article | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.description.version | acceptedVersion | nb_NO |
dc.rights.holder | © 2018 The Author(s). | nb_NO |
dc.subject.nsi | VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Tektonikk: 463 | nb_NO |
dc.source.pagenumber | 605-618 | nb_NO |
dc.source.volume | 175 | nb_NO |
dc.source.journal | Journal of the Geological Society | nb_NO |
dc.source.issue | 4 | nb_NO |
dc.identifier.doi | 10.1144/jgs2017-091 | |
dc.identifier.cristin | 1581002 | |
cristin.unitcode | 203,12,7,0 | |
cristin.unitname | Institutt for miljø- og naturvitskap | |
cristin.ispublished | true | |
cristin.fulltext | postprint | |
cristin.qualitycode | 1 | |
dc.date.embargoenddate | 2019-02-22 | |