Dolerites of Svalbard, north-west Barents Sea Shelf: age, tectonic setting and significance for geotectonic interpretation of the High-Arctic Large Igneous Province
The dolerites of Svalbard are mineralogically and geochemically homogeneous with geochemical features typical of continental within-plate tholeiites. Their geochemistry is similar to tholeiites belonging to a bimodal suite defined as the High-Arctic Large Igneous Province (HALIP). K–Ar dating of num...
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Norwegian Polar Institute
2011
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ftdoajarticles:oai:doaj.org/article:59c7503bfa9b494dbf27a9dd4ba8c171 2023-05-15T13:20:22+02:00 Dolerites of Svalbard, north-west Barents Sea Shelf: age, tectonic setting and significance for geotectonic interpretation of the High-Arctic Large Igneous Province Zoltán Pécskay Elzbieta Dubinska Krzysztof P. Krajewski Krzysztof Nejbert 2011-08-01T00:00:00Z https://doi.org/10.3402/polar.v30i0.7306 https://doaj.org/article/59c7503bfa9b494dbf27a9dd4ba8c171 EN eng Norwegian Polar Institute http://www.polarresearch.net/index.php/polar/article/view/7306/pdf_216 https://doaj.org/toc/0800-0395 https://doaj.org/toc/1751-8369 doi:10.3402/polar.v30i0.7306 0800-0395 1751-8369 https://doaj.org/article/59c7503bfa9b494dbf27a9dd4ba8c171 Polar Research, Vol 30, Iss 0, Pp 1-24 (2011) Dolerite geochemistry petrogenesis K–Ar whole rock ages Svalbard Cretaceous Environmental sciences GE1-350 Oceanography GC1-1581 article 2011 ftdoajarticles https://doi.org/10.3402/polar.v30i0.7306 2022-12-31T08:46:02Z The dolerites of Svalbard are mineralogically and geochemically homogeneous with geochemical features typical of continental within-plate tholeiites. Their geochemistry is similar to tholeiites belonging to a bimodal suite defined as the High-Arctic Large Igneous Province (HALIP). K–Ar dating of numerous dolerites sampled from many locations across Svalbard define a narrow time span of this magmatism from 125.5±3.6 to 78.3±2.6 Mya. Discrete peaks of intensive activity occurred at 115.3, 100.8, 91.3 and 78.5 Mya corresponding to (1) breakup of the continental crust and formation of an initial rift as a result of mantle plume activity, located in the southern part of the Alpha Ridge; (2) magmatic activity related to spreading along the Alpha Ridge that led to the development of the initial oceanic crust and (3) continuation of spreading along the Alpha Ridge and termination of magmatic activity related to HALIP (last two peaks at 91.3 and 78.5 Mya). Article in Journal/Newspaper alpha ridge Arctic Barents Sea Polar Research Svalbard Directory of Open Access Journals: DOAJ Articles Alpha Ridge ENVELOPE(-120.000,-120.000,85.500,85.500) Arctic Barents Sea Svalbard Polar Research 30 1 7306 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Dolerite geochemistry petrogenesis K–Ar whole rock ages Svalbard Cretaceous Environmental sciences GE1-350 Oceanography GC1-1581 |
spellingShingle |
Dolerite geochemistry petrogenesis K–Ar whole rock ages Svalbard Cretaceous Environmental sciences GE1-350 Oceanography GC1-1581 Zoltán Pécskay Elzbieta Dubinska Krzysztof P. Krajewski Krzysztof Nejbert Dolerites of Svalbard, north-west Barents Sea Shelf: age, tectonic setting and significance for geotectonic interpretation of the High-Arctic Large Igneous Province |
topic_facet |
Dolerite geochemistry petrogenesis K–Ar whole rock ages Svalbard Cretaceous Environmental sciences GE1-350 Oceanography GC1-1581 |
description |
The dolerites of Svalbard are mineralogically and geochemically homogeneous with geochemical features typical of continental within-plate tholeiites. Their geochemistry is similar to tholeiites belonging to a bimodal suite defined as the High-Arctic Large Igneous Province (HALIP). K–Ar dating of numerous dolerites sampled from many locations across Svalbard define a narrow time span of this magmatism from 125.5±3.6 to 78.3±2.6 Mya. Discrete peaks of intensive activity occurred at 115.3, 100.8, 91.3 and 78.5 Mya corresponding to (1) breakup of the continental crust and formation of an initial rift as a result of mantle plume activity, located in the southern part of the Alpha Ridge; (2) magmatic activity related to spreading along the Alpha Ridge that led to the development of the initial oceanic crust and (3) continuation of spreading along the Alpha Ridge and termination of magmatic activity related to HALIP (last two peaks at 91.3 and 78.5 Mya). |
format |
Article in Journal/Newspaper |
author |
Zoltán Pécskay Elzbieta Dubinska Krzysztof P. Krajewski Krzysztof Nejbert |
author_facet |
Zoltán Pécskay Elzbieta Dubinska Krzysztof P. Krajewski Krzysztof Nejbert |
author_sort |
Zoltán Pécskay |
title |
Dolerites of Svalbard, north-west Barents Sea Shelf: age, tectonic setting and significance for geotectonic interpretation of the High-Arctic Large Igneous Province |
title_short |
Dolerites of Svalbard, north-west Barents Sea Shelf: age, tectonic setting and significance for geotectonic interpretation of the High-Arctic Large Igneous Province |
title_full |
Dolerites of Svalbard, north-west Barents Sea Shelf: age, tectonic setting and significance for geotectonic interpretation of the High-Arctic Large Igneous Province |
title_fullStr |
Dolerites of Svalbard, north-west Barents Sea Shelf: age, tectonic setting and significance for geotectonic interpretation of the High-Arctic Large Igneous Province |
title_full_unstemmed |
Dolerites of Svalbard, north-west Barents Sea Shelf: age, tectonic setting and significance for geotectonic interpretation of the High-Arctic Large Igneous Province |
title_sort |
dolerites of svalbard, north-west barents sea shelf: age, tectonic setting and significance for geotectonic interpretation of the high-arctic large igneous province |
publisher |
Norwegian Polar Institute |
publishDate |
2011 |
url |
https://doi.org/10.3402/polar.v30i0.7306 https://doaj.org/article/59c7503bfa9b494dbf27a9dd4ba8c171 |
long_lat |
ENVELOPE(-120.000,-120.000,85.500,85.500) |
geographic |
Alpha Ridge Arctic Barents Sea Svalbard |
geographic_facet |
Alpha Ridge Arctic Barents Sea Svalbard |
genre |
alpha ridge Arctic Barents Sea Polar Research Svalbard |
genre_facet |
alpha ridge Arctic Barents Sea Polar Research Svalbard |
op_source |
Polar Research, Vol 30, Iss 0, Pp 1-24 (2011) |
op_relation |
http://www.polarresearch.net/index.php/polar/article/view/7306/pdf_216 https://doaj.org/toc/0800-0395 https://doaj.org/toc/1751-8369 doi:10.3402/polar.v30i0.7306 0800-0395 1751-8369 https://doaj.org/article/59c7503bfa9b494dbf27a9dd4ba8c171 |
op_doi |
https://doi.org/10.3402/polar.v30i0.7306 |
container_title |
Polar Research |
container_volume |
30 |
container_issue |
1 |
container_start_page |
7306 |
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1766353048297275392 |