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dc.contributor.authorPaulsen, Hanne-Kristin
dc.contributor.authorBergh, Steffen G
dc.contributor.authorPalinkas, Sabina Strmic
dc.contributor.authorKarlsen, Siri
dc.contributor.authorKolsum, Sofie
dc.contributor.authorRønningen, Ida Ulvik
dc.contributor.authorArmitage, Paul E.B.
dc.contributor.authorNasuti, Aziz
dc.date.accessioned2021-08-12T10:47:29Z
dc.date.available2021-08-12T10:47:29Z
dc.date.issued2021-07-15
dc.description.abstractPalaeoproterozoic fold-thrust belt structures and steep, lateral shear zones characterize the foreland deformation of Neoarchaean basement tonalites in Vanna, West Troms Basement Complex, northern Norway. Low-grade par-autochthonous and allochthonous cover units (2.4–2.2. Ga) with sandstones and calcareous metapelites exist in separate areas of the foreland. They were formed as intracontinental rift- and/or deltaic shelf deposits, and subsequently intruded by a diorite sill at c. 2.2 Ga. The basement and cover units were folded and inverted along low-angle thrusts and steep reverse faults during two late/post Svecofennian (1.77–1.63 Ga) orthogonal shortening events (D1-D2). The D1 event involved NE-SW shortening, folding, ENE-directed thrusting, and dextral lateral shearing, controlled by pre-existing, N-S striking mafic dykes (c. 2.4 Ga) and basin-bounding normal faults. The D2 event involved SE vergent nappe translation, flat-ramp thrust propagation in a frontal duplex above a basement-seated detachment, and sinistral lateral reactivation in a partitioned orogen-parallel, transpressive setting. Hydrothermal fluid circulation affected all the shear zones. New aeromagnetic data show the basement-involved fold-thrust belt architecture well. The orthogonal Vanna Island fold-thrust belt styles of deformation resemble other inverted rift-basin deposits in northern Fennoscandia, deformed during the Svecofennian Orogeny (1.92–1.79 Ga), Alta-Kautokeino and Karasjok greenstone belts in northern Norway, Central Lapland, Peräpohja, Kittilä and Kuusamo belts of Finland, and in the Norrbotten province of Sweden. Westward younging of the orogenic events explain the younger age span of deformation on Vanna Islanden_US
dc.identifier.citationPaulsen, Bergh, Palinkas, Karlsen, Kolsum, Rønningen, Armitage, Nasuti. Palaeoproterozoic foreland fold-thrust belt structures and lateral faults in the West Troms Basement Complex, northern Norway, and their relation to inverted metasedimentary sequences. Precambrian Research. 2021;362en_US
dc.identifier.cristinIDFRIDAID 1924088
dc.identifier.doi10.1016/j.precamres.2021.106304
dc.identifier.issn0301-9268
dc.identifier.issn1872-7433
dc.identifier.urihttps://hdl.handle.net/10037/22016
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalPrecambrian Research
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2021 The Author(s)en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450en_US
dc.titlePalaeoproterozoic foreland fold-thrust belt structures and lateral faults in the West Troms Basement Complex, northern Norway, and their relation to inverted metasedimentary sequencesen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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