Tectonostratigraphy in the Velfjord-Tosen region, southwestern part of the Helgeland Nappe Complex, Central Norwegian Caledonides.
In the southwestern parts of the Helgeland Nappe Complex, dismembered ophiolites and their cover sequences are imbricated together with nappes consisting dominantly of continentally derived rock units. A local nappe sequence comprises three nappes, informally termed the Lower, Middle and Upper nappe...
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ftnorgesgu:oai:openarchive.ngu.no:11250/2674266 2023-05-15T16:34:07+02:00 Tectonostratigraphy in the Velfjord-Tosen region, southwestern part of the Helgeland Nappe Complex, Central Norwegian Caledonides. Løseth, Helge Thorsnes, Terje 1991 application/pdf https://hdl.handle.net/11250/2674266 nor nor NGU Bulletin (421) https://hdl.handle.net/11250/2674266 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no CC-BY 1-18 STRATIGRAFI TEKTONIKK KALEDONSKE FJELLKJEDE STRUKTURGEOLOGI Journal article 1991 ftnorgesgu 2022-07-03T15:26:20Z In the southwestern parts of the Helgeland Nappe Complex, dismembered ophiolites and their cover sequences are imbricated together with nappes consisting dominantly of continentally derived rock units. A local nappe sequence comprises three nappes, informally termed the Lower, Middle and Upper nappes. The Lower and Upper nappes consist of partly migmatic mica gneisses and othogneisses associated with marbles and calc-silicate gneisses. Between these nappes, the Middle nappe includes an igneous complex of mafic and ultramafic rocks of ophiolitic affinity, unconformably overlain by a cover sequence with material derived partly from the ophiolite substrate. Plutonic rocks, ranging from hornblende gabbros to diorites and granites, were emplaced at several stages during the tectonometamorphic evolution of the region. Based on comparison with nearby areas, most of the regional metamorphism and deformation would seem to have occured in the Ordovician, with a later phase of thrusting during the Mid Silurian to Early Devonian Scandian orogeny. 36272 Article in Journal/Newspaper Helgeland NGU Open Archive (Geological Survey of Norway) Helgeland Tosen ENVELOPE(12.726,12.726,65.203,65.203) Velfjord ENVELOPE(12.522,12.522,65.405,65.405) |
institution |
Open Polar |
collection |
NGU Open Archive (Geological Survey of Norway) |
op_collection_id |
ftnorgesgu |
language |
Norwegian |
topic |
STRATIGRAFI TEKTONIKK KALEDONSKE FJELLKJEDE STRUKTURGEOLOGI |
spellingShingle |
STRATIGRAFI TEKTONIKK KALEDONSKE FJELLKJEDE STRUKTURGEOLOGI Løseth, Helge Thorsnes, Terje Tectonostratigraphy in the Velfjord-Tosen region, southwestern part of the Helgeland Nappe Complex, Central Norwegian Caledonides. |
topic_facet |
STRATIGRAFI TEKTONIKK KALEDONSKE FJELLKJEDE STRUKTURGEOLOGI |
description |
In the southwestern parts of the Helgeland Nappe Complex, dismembered ophiolites and their cover sequences are imbricated together with nappes consisting dominantly of continentally derived rock units. A local nappe sequence comprises three nappes, informally termed the Lower, Middle and Upper nappes. The Lower and Upper nappes consist of partly migmatic mica gneisses and othogneisses associated with marbles and calc-silicate gneisses. Between these nappes, the Middle nappe includes an igneous complex of mafic and ultramafic rocks of ophiolitic affinity, unconformably overlain by a cover sequence with material derived partly from the ophiolite substrate. Plutonic rocks, ranging from hornblende gabbros to diorites and granites, were emplaced at several stages during the tectonometamorphic evolution of the region. Based on comparison with nearby areas, most of the regional metamorphism and deformation would seem to have occured in the Ordovician, with a later phase of thrusting during the Mid Silurian to Early Devonian Scandian orogeny. 36272 |
format |
Article in Journal/Newspaper |
author |
Løseth, Helge Thorsnes, Terje |
author_facet |
Løseth, Helge Thorsnes, Terje |
author_sort |
Løseth, Helge |
title |
Tectonostratigraphy in the Velfjord-Tosen region, southwestern part of the Helgeland Nappe Complex, Central Norwegian Caledonides. |
title_short |
Tectonostratigraphy in the Velfjord-Tosen region, southwestern part of the Helgeland Nappe Complex, Central Norwegian Caledonides. |
title_full |
Tectonostratigraphy in the Velfjord-Tosen region, southwestern part of the Helgeland Nappe Complex, Central Norwegian Caledonides. |
title_fullStr |
Tectonostratigraphy in the Velfjord-Tosen region, southwestern part of the Helgeland Nappe Complex, Central Norwegian Caledonides. |
title_full_unstemmed |
Tectonostratigraphy in the Velfjord-Tosen region, southwestern part of the Helgeland Nappe Complex, Central Norwegian Caledonides. |
title_sort |
tectonostratigraphy in the velfjord-tosen region, southwestern part of the helgeland nappe complex, central norwegian caledonides. |
publishDate |
1991 |
url |
https://hdl.handle.net/11250/2674266 |
long_lat |
ENVELOPE(12.726,12.726,65.203,65.203) ENVELOPE(12.522,12.522,65.405,65.405) |
geographic |
Helgeland Tosen Velfjord |
geographic_facet |
Helgeland Tosen Velfjord |
genre |
Helgeland |
genre_facet |
Helgeland |
op_source |
1-18 |
op_relation |
NGU Bulletin (421) https://hdl.handle.net/11250/2674266 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
op_rightsnorm |
CC-BY |
_version_ |
1766023869452255232 |