Revised tectonostratigraphy and structural evolution of the Köli Nappe Complex, Central Caledonides in Nordland, Norway
The nappe stack in the Røssvatnet-Hattfjelldal 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 tectono-metamorphic evolution that is younger t...
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Geological Society of London
2021
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ftdatacite:10.6084/m9.figshare.c.5357255.v1 2023-05-15T16:33:47+02:00 Revised tectonostratigraphy and structural evolution of the Köli Nappe Complex, Central Caledonides in Nordland, Norway K. Saalmann T. Bjerkgård T. Slagstad J.S. Sandstad O. Lutro J. Keiding B. Snook T. Larsen Angvik 2021 https://dx.doi.org/10.6084/m9.figshare.c.5357255.v1 https://geolsoc.figshare.com/collections/Revised_tectonostratigraphy_and_structural_evolution_of_the_K_li_Nappe_Complex_Central_Caledonides_in_Nordland_Norway/5357255/1 unknown Geological Society of London https://dx.doi.org/10.1144/jgs2020-214 https://dx.doi.org/10.6084/m9.figshare.c.5357255 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Geology FOS Earth and related environmental sciences Collection article 2021 ftdatacite https://doi.org/10.6084/m9.figshare.c.5357255.v1 https://doi.org/10.1144/jgs2020-214 https://doi.org/10.6084/m9.figshare.c.5357255 2021-11-05T12:55:41Z The nappe stack in the Røssvatnet-Hattfjelldal 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 tectono-metamorphic evolution that is younger than the 491±10 Ma depositional (volcanic) age of parts of the succession. Early deformation stages 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-Pb zircon ages of 446±5 and 444±4 Ma, respectively. Large scale nappe stacking and folding postdating emplacement of the gabbro was related to collision of Laurentia with Baltica (Scandian orogeny) and followed by late-/postorogenic extension. The revised tectonostratigraphy assigns the structurally higher nappes to the Uppermost Allochthon while the lower nappes are correlated with the Middle Köli Nappe Complex (Upper Allochthon). The boundary between them is marked by an imbricate zone. Taconian deformation was probably much more penetrative and widespread than hitherto thought; thus, parts of the nappe stack were likely assembled prior to Scandian collision. Article in Journal/Newspaper Hattfjelldal Nordland Nordland Nordland DataCite Metadata Store (German National Library of Science and Technology) Norway Hattfjelldal ENVELOPE(13.988,13.988,65.597,65.597) Røssvatnet ENVELOPE(8.615,8.615,63.698,63.698) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Geology FOS Earth and related environmental sciences |
spellingShingle |
Geology FOS Earth and related environmental sciences K. Saalmann T. Bjerkgård T. Slagstad J.S. Sandstad O. Lutro J. Keiding B. Snook T. Larsen Angvik Revised tectonostratigraphy and structural evolution of the Köli Nappe Complex, Central Caledonides in Nordland, Norway |
topic_facet |
Geology FOS Earth and related environmental sciences |
description |
The nappe stack in the Røssvatnet-Hattfjelldal 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 tectono-metamorphic evolution that is younger than the 491±10 Ma depositional (volcanic) age of parts of the succession. Early deformation stages 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-Pb zircon ages of 446±5 and 444±4 Ma, respectively. Large scale nappe stacking and folding postdating emplacement of the gabbro was related to collision of Laurentia with Baltica (Scandian orogeny) and followed by late-/postorogenic extension. The revised tectonostratigraphy assigns the structurally higher nappes to the Uppermost Allochthon while the lower nappes are correlated with the Middle Köli Nappe Complex (Upper Allochthon). The boundary between them is marked by an imbricate zone. Taconian deformation was probably much more penetrative and widespread than hitherto thought; thus, parts of the nappe stack were likely assembled prior to Scandian collision. |
format |
Article in Journal/Newspaper |
author |
K. Saalmann T. Bjerkgård T. Slagstad J.S. Sandstad O. Lutro J. Keiding B. Snook T. Larsen Angvik |
author_facet |
K. Saalmann T. Bjerkgård T. Slagstad J.S. Sandstad O. Lutro J. Keiding B. Snook T. Larsen Angvik |
author_sort |
K. Saalmann |
title |
Revised tectonostratigraphy and structural evolution of the Köli Nappe Complex, Central Caledonides in Nordland, Norway |
title_short |
Revised tectonostratigraphy and structural evolution of the Köli Nappe Complex, Central Caledonides in Nordland, Norway |
title_full |
Revised tectonostratigraphy and structural evolution of the Köli Nappe Complex, Central Caledonides in Nordland, Norway |
title_fullStr |
Revised tectonostratigraphy and structural evolution of the Köli Nappe Complex, Central Caledonides in Nordland, Norway |
title_full_unstemmed |
Revised tectonostratigraphy and structural evolution of the Köli Nappe Complex, Central Caledonides in Nordland, Norway |
title_sort |
revised tectonostratigraphy and structural evolution of the köli nappe complex, central caledonides in nordland, norway |
publisher |
Geological Society of London |
publishDate |
2021 |
url |
https://dx.doi.org/10.6084/m9.figshare.c.5357255.v1 https://geolsoc.figshare.com/collections/Revised_tectonostratigraphy_and_structural_evolution_of_the_K_li_Nappe_Complex_Central_Caledonides_in_Nordland_Norway/5357255/1 |
long_lat |
ENVELOPE(13.988,13.988,65.597,65.597) ENVELOPE(8.615,8.615,63.698,63.698) |
geographic |
Norway Hattfjelldal Røssvatnet |
geographic_facet |
Norway Hattfjelldal Røssvatnet |
genre |
Hattfjelldal Nordland Nordland Nordland |
genre_facet |
Hattfjelldal Nordland Nordland Nordland |
op_relation |
https://dx.doi.org/10.1144/jgs2020-214 https://dx.doi.org/10.6084/m9.figshare.c.5357255 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.c.5357255.v1 https://doi.org/10.1144/jgs2020-214 https://doi.org/10.6084/m9.figshare.c.5357255 |
_version_ |
1766023499062706176 |