The Billefjorden Fault Zone north of Spitsbergen: a major terrane boundary?
The Billefjorden Fault Zone is a major terrane boundary in the Norwegian Arctic. The fault separates basement rocks of Svalbard’s north-eastern and north-western terranes that recorded discrete Precambrian tectonothermal histories and were accreted, intensely deformed and metamorphosed during the Ca...
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Norwegian Polar Institute
2021
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ftdoajarticles:oai:doaj.org/article:10f514eb6e6346b4b5774caab94b9923 2023-05-15T13:25:33+02:00 The Billefjorden Fault Zone north of Spitsbergen: a major terrane boundary? Jean-Baptiste P. Koehl Lis Allaart 2021-10-01T00:00:00Z https://doi.org/10.33265/polar.v40.7668 https://doaj.org/article/10f514eb6e6346b4b5774caab94b9923 EN eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/7668/13957 https://doaj.org/toc/0800-0395 https://doaj.org/toc/1751-8369 0800-0395 1751-8369 doi:10.33265/polar.v40.7668 https://doaj.org/article/10f514eb6e6346b4b5774caab94b9923 Polar Research, Vol 40, Pp 1-9 (2021) fault basement terranes seismic facies svalbard tectonic Environmental sciences GE1-350 Oceanography GC1-1581 article 2021 ftdoajarticles https://doi.org/10.33265/polar.v40.7668 2022-12-31T11:08:24Z The Billefjorden Fault Zone is a major terrane boundary in the Norwegian Arctic. The fault separates basement rocks of Svalbard’s north-eastern and north-western terranes that recorded discrete Precambrian tectonothermal histories and were accreted, intensely deformed and metamorphosed during the Caledonian Orogeny. Although the fault represents a major, crustal-scale tectonic boundary, its northward extent is not well constrained. The present short contribution addresses this issue and presents new seismic mapping of structures and rock units north of Wijdefjorden, where the Billefjorden Fault Zone may continue. This study shows that there is no evidence for major faulting of the top-basement reflection, and therefore, that the Billefjorden Fault Zone may die out within Wijdefjorden–Austfjorden, step ≥ 20 km laterally, or be invisible on the presented seismic data. Seismic data also suggest that Caledonian basement rocks in Ny-Friesland (north-eastern terrane) are not significantly different from basement rocks below the Devonian Graben in Andrée Land (north-western terrane). Potential implications include the absence of a major terrane boundary in northern Spitsbergen. Article in Journal/Newspaper Andrée-Land Arctic Austfjord* Billefjorden Ny Friesland Polar Research Svalbard Wijdefjord* Spitsbergen Directory of Open Access Journals: DOAJ Articles Arctic Svalbard Billefjorden ENVELOPE(16.417,16.417,78.563,78.563) Andrée ENVELOPE(-61.500,-61.500,-64.516,-64.516) Ny Friesland ENVELOPE(16.847,16.847,79.498,79.498) Wijdefjorden ENVELOPE(15.569,15.569,79.543,79.543) Austfjorden ENVELOPE(16.234,16.234,79.010,79.010) Polar Research 40 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
fault basement terranes seismic facies svalbard tectonic Environmental sciences GE1-350 Oceanography GC1-1581 |
spellingShingle |
fault basement terranes seismic facies svalbard tectonic Environmental sciences GE1-350 Oceanography GC1-1581 Jean-Baptiste P. Koehl Lis Allaart The Billefjorden Fault Zone north of Spitsbergen: a major terrane boundary? |
topic_facet |
fault basement terranes seismic facies svalbard tectonic Environmental sciences GE1-350 Oceanography GC1-1581 |
description |
The Billefjorden Fault Zone is a major terrane boundary in the Norwegian Arctic. The fault separates basement rocks of Svalbard’s north-eastern and north-western terranes that recorded discrete Precambrian tectonothermal histories and were accreted, intensely deformed and metamorphosed during the Caledonian Orogeny. Although the fault represents a major, crustal-scale tectonic boundary, its northward extent is not well constrained. The present short contribution addresses this issue and presents new seismic mapping of structures and rock units north of Wijdefjorden, where the Billefjorden Fault Zone may continue. This study shows that there is no evidence for major faulting of the top-basement reflection, and therefore, that the Billefjorden Fault Zone may die out within Wijdefjorden–Austfjorden, step ≥ 20 km laterally, or be invisible on the presented seismic data. Seismic data also suggest that Caledonian basement rocks in Ny-Friesland (north-eastern terrane) are not significantly different from basement rocks below the Devonian Graben in Andrée Land (north-western terrane). Potential implications include the absence of a major terrane boundary in northern Spitsbergen. |
format |
Article in Journal/Newspaper |
author |
Jean-Baptiste P. Koehl Lis Allaart |
author_facet |
Jean-Baptiste P. Koehl Lis Allaart |
author_sort |
Jean-Baptiste P. Koehl |
title |
The Billefjorden Fault Zone north of Spitsbergen: a major terrane boundary? |
title_short |
The Billefjorden Fault Zone north of Spitsbergen: a major terrane boundary? |
title_full |
The Billefjorden Fault Zone north of Spitsbergen: a major terrane boundary? |
title_fullStr |
The Billefjorden Fault Zone north of Spitsbergen: a major terrane boundary? |
title_full_unstemmed |
The Billefjorden Fault Zone north of Spitsbergen: a major terrane boundary? |
title_sort |
billefjorden fault zone north of spitsbergen: a major terrane boundary? |
publisher |
Norwegian Polar Institute |
publishDate |
2021 |
url |
https://doi.org/10.33265/polar.v40.7668 https://doaj.org/article/10f514eb6e6346b4b5774caab94b9923 |
long_lat |
ENVELOPE(16.417,16.417,78.563,78.563) ENVELOPE(-61.500,-61.500,-64.516,-64.516) ENVELOPE(16.847,16.847,79.498,79.498) ENVELOPE(15.569,15.569,79.543,79.543) ENVELOPE(16.234,16.234,79.010,79.010) |
geographic |
Arctic Svalbard Billefjorden Andrée Ny Friesland Wijdefjorden Austfjorden |
geographic_facet |
Arctic Svalbard Billefjorden Andrée Ny Friesland Wijdefjorden Austfjorden |
genre |
Andrée-Land Arctic Austfjord* Billefjorden Ny Friesland Polar Research Svalbard Wijdefjord* Spitsbergen |
genre_facet |
Andrée-Land Arctic Austfjord* Billefjorden Ny Friesland Polar Research Svalbard Wijdefjord* Spitsbergen |
op_source |
Polar Research, Vol 40, Pp 1-9 (2021) |
op_relation |
https://polarresearch.net/index.php/polar/article/view/7668/13957 https://doaj.org/toc/0800-0395 https://doaj.org/toc/1751-8369 0800-0395 1751-8369 doi:10.33265/polar.v40.7668 https://doaj.org/article/10f514eb6e6346b4b5774caab94b9923 |
op_doi |
https://doi.org/10.33265/polar.v40.7668 |
container_title |
Polar Research |
container_volume |
40 |
_version_ |
1766385991224918016 |