Tectonic reconstruction and sediment provenance of a far-travelled oceanic nappe, Helgeland Nappe Complex, west-central Norway
The Helgeland Nappe Complex (HNC), part of the Uppermost Allochthon of the north-central Norwegian Caledonides, originated near the Laurentian margin and was transferred to Baltica during the closure of Iapetus in Late Silurian–Early Devonian time. The islands of Rødøy, Bolvær and Leka, located in t...
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Geological Society of London
2016
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ftdatacite:10.6084/m9.figshare.3453443.v1 2023-05-15T16:29:23+02:00 Tectonic reconstruction and sediment provenance of a far-travelled oceanic nappe, Helgeland Nappe Complex, west-central Norway McArthur, Kelsey L. Frost, Carol D. Barnes, Calvin G. Prestvik, Tore Nordgulen, Øystein 2016 https://dx.doi.org/10.6084/m9.figshare.3453443.v1 https://geolsoc.figshare.com/articles/dataset/Tectonic_reconstruction_and_sediment_provenance_of_a_far-travelled_oceanic_nappe_Helgeland_Nappe_Complex_west-central_Norway/3453443/1 unknown Geological Society of London https://dx.doi.org/10.1144/sp390.3 https://dx.doi.org/10.6084/m9.figshare.3453443 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 dataset Dataset 2016 ftdatacite https://doi.org/10.6084/m9.figshare.3453443.v1 https://doi.org/10.1144/sp390.3 https://doi.org/10.6084/m9.figshare.3453443 2021-11-05T12:55:41Z The Helgeland Nappe Complex (HNC), part of the Uppermost Allochthon of the north-central Norwegian Caledonides, originated near the Laurentian margin and was transferred to Baltica during the closure of Iapetus in Late Silurian–Early Devonian time. The islands of Rødøy, Bolvær and Leka, located in the Sauren–Torghatten (S–T) nappe of the HNC, are composed of ultramafic and mafic basement rocks unconformably overlain by metaconglomerates and fine-grained metasedimentary rocks. Geochemical and isotopic characteristics of the basement rocks are consistent with formation in a supra-subduction zone setting. Overlying metasedimentary rocks record an increasing proportion of continental detritus supplied to the basins through time. Precambrian cratonic source regions supplied cobbles and other detritus. This source area may have been located in modern SE Greenland/Labrador or in the Lower Nappe of the HNC. The second alternative best accounts for the short transport distances required by the coarse-grained conglomerates. The maximum age of deposition is constrained by the age of the youngest zircon grain dated at 471±8 Ma. Final sedimentation, nappe thrusting and nappe stacking occurred in rapid succession during c. 480–475 Ma. Dataset Greenland Helgeland Rødøy Torghatten DataCite Metadata Store (German National Library of Science and Technology) Bolvær ENVELOPE(12.067,12.067,65.483,65.483) Greenland Helgeland Leka ENVELOPE(11.709,11.709,65.089,65.089) Norway Rødøy ENVELOPE(13.083,13.083,66.650,66.650) Sauren ENVELOPE(12.119,12.119,65.474,65.474) |
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 McArthur, Kelsey L. Frost, Carol D. Barnes, Calvin G. Prestvik, Tore Nordgulen, Øystein Tectonic reconstruction and sediment provenance of a far-travelled oceanic nappe, Helgeland Nappe Complex, west-central Norway |
topic_facet |
Geology FOS Earth and related environmental sciences |
description |
The Helgeland Nappe Complex (HNC), part of the Uppermost Allochthon of the north-central Norwegian Caledonides, originated near the Laurentian margin and was transferred to Baltica during the closure of Iapetus in Late Silurian–Early Devonian time. The islands of Rødøy, Bolvær and Leka, located in the Sauren–Torghatten (S–T) nappe of the HNC, are composed of ultramafic and mafic basement rocks unconformably overlain by metaconglomerates and fine-grained metasedimentary rocks. Geochemical and isotopic characteristics of the basement rocks are consistent with formation in a supra-subduction zone setting. Overlying metasedimentary rocks record an increasing proportion of continental detritus supplied to the basins through time. Precambrian cratonic source regions supplied cobbles and other detritus. This source area may have been located in modern SE Greenland/Labrador or in the Lower Nappe of the HNC. The second alternative best accounts for the short transport distances required by the coarse-grained conglomerates. The maximum age of deposition is constrained by the age of the youngest zircon grain dated at 471±8 Ma. Final sedimentation, nappe thrusting and nappe stacking occurred in rapid succession during c. 480–475 Ma. |
format |
Dataset |
author |
McArthur, Kelsey L. Frost, Carol D. Barnes, Calvin G. Prestvik, Tore Nordgulen, Øystein |
author_facet |
McArthur, Kelsey L. Frost, Carol D. Barnes, Calvin G. Prestvik, Tore Nordgulen, Øystein |
author_sort |
McArthur, Kelsey L. |
title |
Tectonic reconstruction and sediment provenance of a far-travelled oceanic nappe, Helgeland Nappe Complex, west-central Norway |
title_short |
Tectonic reconstruction and sediment provenance of a far-travelled oceanic nappe, Helgeland Nappe Complex, west-central Norway |
title_full |
Tectonic reconstruction and sediment provenance of a far-travelled oceanic nappe, Helgeland Nappe Complex, west-central Norway |
title_fullStr |
Tectonic reconstruction and sediment provenance of a far-travelled oceanic nappe, Helgeland Nappe Complex, west-central Norway |
title_full_unstemmed |
Tectonic reconstruction and sediment provenance of a far-travelled oceanic nappe, Helgeland Nappe Complex, west-central Norway |
title_sort |
tectonic reconstruction and sediment provenance of a far-travelled oceanic nappe, helgeland nappe complex, west-central norway |
publisher |
Geological Society of London |
publishDate |
2016 |
url |
https://dx.doi.org/10.6084/m9.figshare.3453443.v1 https://geolsoc.figshare.com/articles/dataset/Tectonic_reconstruction_and_sediment_provenance_of_a_far-travelled_oceanic_nappe_Helgeland_Nappe_Complex_west-central_Norway/3453443/1 |
long_lat |
ENVELOPE(12.067,12.067,65.483,65.483) ENVELOPE(11.709,11.709,65.089,65.089) ENVELOPE(13.083,13.083,66.650,66.650) ENVELOPE(12.119,12.119,65.474,65.474) |
geographic |
Bolvær Greenland Helgeland Leka Norway Rødøy Sauren |
geographic_facet |
Bolvær Greenland Helgeland Leka Norway Rødøy Sauren |
genre |
Greenland Helgeland Rødøy Torghatten |
genre_facet |
Greenland Helgeland Rødøy Torghatten |
op_relation |
https://dx.doi.org/10.1144/sp390.3 https://dx.doi.org/10.6084/m9.figshare.3453443 |
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.3453443.v1 https://doi.org/10.1144/sp390.3 https://doi.org/10.6084/m9.figshare.3453443 |
_version_ |
1766019083169431552 |