{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T14:32:46Z","timestamp":1753885966798,"version":"3.41.2"},"reference-count":113,"publisher":"Geological Society of London","issue":"5","license":[{"start":{"date-parts":[[2021,5,7]],"date-time":"2021-05-07T00:00:00Z","timestamp":1620345600000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-002"}],"content-domain":{"domain":["www.lyellcollection.org"],"crossmark-restriction":true},"short-container-title":["JGS"],"published-print":{"date-parts":[[2021,9]]},"abstract":"<jats:p>The nappe stack in the R\u00f8ssvatnet\u2013Hattfjelldal region in the Central Norwegian Caledonides consists of seven nappes formed at the boundary between tectonostratigraphically upper and uppermost Caledonian levels. The rocks of all nappes share a polyphase tectonometamorphic evolution that is younger than the 491\u2009\u00b1\u200910\u2005Ma depositional (volcanic) age of parts of the succession. Early stages of deformation characterized by centimetre- to kilometre-scale folding and intense shearing accompanied by greenschist to amphibolite facies peak metamorphism are correlated with the Early Ordovician Taconian accretionary orogeny along the Laurentian margin. The Taconian structures are cut by the Krutfjellet gabbro and diorite, which yield U\u2013Pb zircon ages of 446\u2009\u00b1\u20095 and 444\u2009\u00b1\u20094\u2005Ma, respectively. Large-scale nappe stacking and folding post-dating the emplacement of the gabbro is related to the collision of Laurentia with Baltica (Scandian orogeny) and was followed by late- to post-orogenic extension. The revised tectonostratigraphy assigns the structurally higher nappes to the Uppermost Allochthon, whereas the lower nappes are correlated with the Middle K\u00f6li Nappe Complex (Upper Allochthon). The boundary between these nappes is marked by an imbricate zone. Taconian deformation was probably much more penetrative and widespread than hitherto thought and therefore parts of the nappe stack were probably assembled before Scandian collision.<\/jats:p>\n          <jats:p content-type=\"supplementary-material\">\n            <jats:bold>Supplementary material:<\/jats:bold>\n            Electronic Supplement 1: U\u2013Pb zircon data and Electronic Supplement 2: Methods (laser ablation inductively coupled plasma mass spectrometry U\u2013Pb zircon geochronology) are available at\n            <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" specific-use=\"dataset is-supplemented-by\" xlink:href=\"https:\/\/doi.org\/10.6084\/m9.figshare.c.5357255\">https:\/\/doi.org\/10.6084\/m9.figshare.c.5357255<\/jats:ext-link>\n          <\/jats:p>","DOI":"10.1144\/jgs2020-214","type":"journal-article","created":{"date-parts":[[2021,4,1]],"date-time":"2021-04-01T16:35:55Z","timestamp":1617294955000},"update-policy":"https:\/\/doi.org\/10.1144\/crossmark-policy","source":"Crossref","is-referenced-by-count":2,"title":["Revised tectonostratigraphy and structural evolution of the K\u00f6li Nappe Complex, Central Caledonides in Nordland, Norway"],"prefix":"10.1144","volume":"178","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4244-6708","authenticated-orcid":false,"given":"K.","family":"Saalmann","sequence":"first","affiliation":[{"name":"Geological Survey of Norway, Leiv Eirikssons vei 39, 7040 Trondheim, Norway"}]},{"given":"T.","family":"Bjerkg\u00e5rd","sequence":"additional","affiliation":[{"name":"Geological Survey of Norway, Leiv Eirikssons vei 39, 7040 Trondheim, Norway"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8059-2426","authenticated-orcid":false,"given":"T.","family":"Slagstad","sequence":"additional","affiliation":[{"name":"Geological Survey of Norway, Leiv Eirikssons vei 39, 7040 Trondheim, Norway"}]},{"given":"J.S.","family":"Sandstad","sequence":"additional","affiliation":[{"name":"Geological Survey of Norway, Leiv Eirikssons vei 39, 7040 Trondheim, Norway"}]},{"given":"O.","family":"Lutro","sequence":"additional","affiliation":[{"name":"Geological Survey of Norway, Leiv Eirikssons vei 39, 7040 Trondheim, Norway"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4342-7541","authenticated-orcid":false,"given":"J.","family":"Keiding","sequence":"additional","affiliation":[{"name":"Geological Survey of Denmark and Greenland, \u00d8ster Voldgate 10, 1350 Copenhagen K, Denmark"}]},{"given":"B.","family":"Snook","sequence":"additional","affiliation":[{"name":"Department of Geosciences and Petroleum, Norwegian University of Science and Technology, S.P. Andersens veg 15a, 7031 Trondheim, Norway"}]},{"given":"T.L.","family":"Angvik","sequence":"additional","affiliation":[{"name":"Geological Survey of Norway, Leiv Eirikssons vei 39, 7040 Trondheim, Norway"}]}],"member":"1881","published-online":{"date-parts":[[2021,5,7]]},"reference":[{"key":"e_1_3_5_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.precamres.2012.06.008"},{"key":"e_1_3_5_3_1","doi-asserted-by":"publisher","DOI":"10.1029\/TC009i005p01097"},{"key":"e_1_3_5_4_1","first-page":"251","article-title":"Magma emplacement and the development of ghost stratigraphy in the Andalshatten pluton, Central Norway","volume":"40","author":"Anderson H.S.","year":"2008","unstructured":"Anderson, H.S., Yoshinobu, A.S., Chamberlain, K., Nordgulen, O. and Barnes, C.G. 2008. Magma emplacement and the development of ghost stratigraphy in the Andalshatten pluton, Central Norway. 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