Seismic mapping of the post-Caledonian Svalbard
The status of seismic exploration work mapping the post-Caledonian strata in the Svalbard area is presented. Compressional wave velocities are very high throughout the area, around 4 km/s in the Tertiary and Mesozoic layers. In the Permian section velocities exceed 5 km/s, with refraction velocities...
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Norwegian Polar Institute
1985
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ftjpolarres:oai:journals.openacademia.net:article/2523 2023-05-15T18:02:40+02:00 Seismic mapping of the post-Caledonian Svalbard Eiken, Ola 1985-01-12 application/pdf https://polarresearch.net/index.php/polar/article/view/2523 https://doi.org/10.3402/polar.v3i2.6950 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/2523/5774 https://polarresearch.net/index.php/polar/article/view/2523 doi:10.3402/polar.v3i2.6950 Copyright (c) 2018 Polar Research Polar Research; Vol. 3 No. 2 (1985); 167-176 1751-8369 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1985 ftjpolarres https://doi.org/10.3402/polar.v3i2.6950 2021-11-11T19:12:57Z The status of seismic exploration work mapping the post-Caledonian strata in the Svalbard area is presented. Compressional wave velocities are very high throughout the area, around 4 km/s in the Tertiary and Mesozoic layers. In the Permian section velocities exceed 5 km/s, with refraction velocities > 6 km/s in the calcareous rocks of the Gipsdalen Group (early Permian/Late Carboniferous). Apart from correlation with carbonate and chert lithology, high velocities reflect the high degree of consolidation and the low porosities of shales and sandstones in the post-Caledonian strata in Svalbard. In van Mjenfjorden seismic reflection events are observed down to 3-4 km depth and associated with Carboniferous and younger strata. The thickness of the Mesozoic layers in this part of the central Spitsbergen syncline seems to be greater than previously suggested, and there is an apparent eastward divergence between the Jurassic and the Triassic reflectors. In south-western Storfjorden, reflections interpreted to originate from Carboniferous and Permian strata might represent the seaward extension of the central Spitsbergen syncline. In the northern part of Storfjorden, carbonate layers within the Gipsdalen Group are interpreted to lie about one kilometre below the sea floor. A prominent fault zone in this area trends NNW-SSE, like the main structural elements on Spitsbergen. It shows block-faulting, presumably caused by extensional movement in late Devonian- Carboniferous time. Article in Journal/Newspaper Polar Research Storfjorden Svalbard Spitsbergen Polar Research (E-Journal) Gipsdalen ENVELOPE(16.877,16.877,78.505,78.505) Svalbard Polar Research 3 2 167 176 |
institution |
Open Polar |
collection |
Polar Research (E-Journal) |
op_collection_id |
ftjpolarres |
language |
English |
description |
The status of seismic exploration work mapping the post-Caledonian strata in the Svalbard area is presented. Compressional wave velocities are very high throughout the area, around 4 km/s in the Tertiary and Mesozoic layers. In the Permian section velocities exceed 5 km/s, with refraction velocities > 6 km/s in the calcareous rocks of the Gipsdalen Group (early Permian/Late Carboniferous). Apart from correlation with carbonate and chert lithology, high velocities reflect the high degree of consolidation and the low porosities of shales and sandstones in the post-Caledonian strata in Svalbard. In van Mjenfjorden seismic reflection events are observed down to 3-4 km depth and associated with Carboniferous and younger strata. The thickness of the Mesozoic layers in this part of the central Spitsbergen syncline seems to be greater than previously suggested, and there is an apparent eastward divergence between the Jurassic and the Triassic reflectors. In south-western Storfjorden, reflections interpreted to originate from Carboniferous and Permian strata might represent the seaward extension of the central Spitsbergen syncline. In the northern part of Storfjorden, carbonate layers within the Gipsdalen Group are interpreted to lie about one kilometre below the sea floor. A prominent fault zone in this area trends NNW-SSE, like the main structural elements on Spitsbergen. It shows block-faulting, presumably caused by extensional movement in late Devonian- Carboniferous time. |
format |
Article in Journal/Newspaper |
author |
Eiken, Ola |
spellingShingle |
Eiken, Ola Seismic mapping of the post-Caledonian Svalbard |
author_facet |
Eiken, Ola |
author_sort |
Eiken, Ola |
title |
Seismic mapping of the post-Caledonian Svalbard |
title_short |
Seismic mapping of the post-Caledonian Svalbard |
title_full |
Seismic mapping of the post-Caledonian Svalbard |
title_fullStr |
Seismic mapping of the post-Caledonian Svalbard |
title_full_unstemmed |
Seismic mapping of the post-Caledonian Svalbard |
title_sort |
seismic mapping of the post-caledonian svalbard |
publisher |
Norwegian Polar Institute |
publishDate |
1985 |
url |
https://polarresearch.net/index.php/polar/article/view/2523 https://doi.org/10.3402/polar.v3i2.6950 |
long_lat |
ENVELOPE(16.877,16.877,78.505,78.505) |
geographic |
Gipsdalen Svalbard |
geographic_facet |
Gipsdalen Svalbard |
genre |
Polar Research Storfjorden Svalbard Spitsbergen |
genre_facet |
Polar Research Storfjorden Svalbard Spitsbergen |
op_source |
Polar Research; Vol. 3 No. 2 (1985); 167-176 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/2523/5774 https://polarresearch.net/index.php/polar/article/view/2523 doi:10.3402/polar.v3i2.6950 |
op_rights |
Copyright (c) 2018 Polar Research |
op_doi |
https://doi.org/10.3402/polar.v3i2.6950 |
container_title |
Polar Research |
container_volume |
3 |
container_issue |
2 |
container_start_page |
167 |
op_container_end_page |
176 |
_version_ |
1766173106119901184 |