Structural development of the Tertiary fold-and-thrust belt in east Oscar II Land, Spitsbergen
The Tertiary deformation in east Oscar II Land, Spitsbergen, is compressional and thin-skinned, and includes thrusts with ramp-flat geometry and associated fault-bend and fault-propagation folds. The thrust front in the Mediumfjellct-Lappdalen area consists of intensely deformed Paleozoic and Mesozo...
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Norwegian Polar Institute
1990
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Online Access: | https://polarresearch.net/index.php/polar/article/view/2385 https://doi.org/10.3402/polar.v8i2.6813 |
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ftjpolarres:oai:journals.openacademia.net:article/2385 2023-05-15T17:54:07+02:00 Structural development of the Tertiary fold-and-thrust belt in east Oscar II Land, Spitsbergen Bergh, Steffen G. Andresen, Arild 1990-01-12 application/pdf https://polarresearch.net/index.php/polar/article/view/2385 https://doi.org/10.3402/polar.v8i2.6813 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/2385/5635 https://polarresearch.net/index.php/polar/article/view/2385 doi:10.3402/polar.v8i2.6813 Copyright (c) 2018 Polar Research Polar Research; Vol. 8 No. 2 (1990); 217-236 1751-8369 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1990 ftjpolarres https://doi.org/10.3402/polar.v8i2.6813 2021-11-11T19:12:32Z The Tertiary deformation in east Oscar II Land, Spitsbergen, is compressional and thin-skinned, and includes thrusts with ramp-flat geometry and associated fault-bend and fault-propagation folds. The thrust front in the Mediumfjellct-Lappdalen area consists of intensely deformed Paleozoic and Mesozoic rocks thrust on top of subhorizontal Mesozoic rocks to the east. The thrust front represents a complex frontal ramp duplex in which most of the eastward displacement is transferred from sole thrusts in the Permian and probably Carboniferous strata to roof thrusts in the Triassic sequence. The internal geometries in the thrust front suggest a complex kinematic development involving not only simple 'piggy-back', in-sequencc thrusting, but also overstep as well as out-of-sequence thrusting. The position of the thrust front and across-strike variation in structural character in east Oscar II Land is interpreted to be controlled by lithological (facies) variations and/or pre-existing structures, at depth, possibly cxtensional faults associated with the Carboniferous graben system. Article in Journal/Newspaper Oscar II Land Polar Research Spitsbergen Polar Research (E-Journal) Oscar II ENVELOPE(-62.500,-62.500,-65.750,-65.750) Oscar II Land ENVELOPE(13.299,13.299,78.441,78.441) Polar Research 8 2 217 236 |
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Open Polar |
collection |
Polar Research (E-Journal) |
op_collection_id |
ftjpolarres |
language |
English |
description |
The Tertiary deformation in east Oscar II Land, Spitsbergen, is compressional and thin-skinned, and includes thrusts with ramp-flat geometry and associated fault-bend and fault-propagation folds. The thrust front in the Mediumfjellct-Lappdalen area consists of intensely deformed Paleozoic and Mesozoic rocks thrust on top of subhorizontal Mesozoic rocks to the east. The thrust front represents a complex frontal ramp duplex in which most of the eastward displacement is transferred from sole thrusts in the Permian and probably Carboniferous strata to roof thrusts in the Triassic sequence. The internal geometries in the thrust front suggest a complex kinematic development involving not only simple 'piggy-back', in-sequencc thrusting, but also overstep as well as out-of-sequence thrusting. The position of the thrust front and across-strike variation in structural character in east Oscar II Land is interpreted to be controlled by lithological (facies) variations and/or pre-existing structures, at depth, possibly cxtensional faults associated with the Carboniferous graben system. |
format |
Article in Journal/Newspaper |
author |
Bergh, Steffen G. Andresen, Arild |
spellingShingle |
Bergh, Steffen G. Andresen, Arild Structural development of the Tertiary fold-and-thrust belt in east Oscar II Land, Spitsbergen |
author_facet |
Bergh, Steffen G. Andresen, Arild |
author_sort |
Bergh, Steffen G. |
title |
Structural development of the Tertiary fold-and-thrust belt in east Oscar II Land, Spitsbergen |
title_short |
Structural development of the Tertiary fold-and-thrust belt in east Oscar II Land, Spitsbergen |
title_full |
Structural development of the Tertiary fold-and-thrust belt in east Oscar II Land, Spitsbergen |
title_fullStr |
Structural development of the Tertiary fold-and-thrust belt in east Oscar II Land, Spitsbergen |
title_full_unstemmed |
Structural development of the Tertiary fold-and-thrust belt in east Oscar II Land, Spitsbergen |
title_sort |
structural development of the tertiary fold-and-thrust belt in east oscar ii land, spitsbergen |
publisher |
Norwegian Polar Institute |
publishDate |
1990 |
url |
https://polarresearch.net/index.php/polar/article/view/2385 https://doi.org/10.3402/polar.v8i2.6813 |
long_lat |
ENVELOPE(-62.500,-62.500,-65.750,-65.750) ENVELOPE(13.299,13.299,78.441,78.441) |
geographic |
Oscar II Oscar II Land |
geographic_facet |
Oscar II Oscar II Land |
genre |
Oscar II Land Polar Research Spitsbergen |
genre_facet |
Oscar II Land Polar Research Spitsbergen |
op_source |
Polar Research; Vol. 8 No. 2 (1990); 217-236 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/2385/5635 https://polarresearch.net/index.php/polar/article/view/2385 doi:10.3402/polar.v8i2.6813 |
op_rights |
Copyright (c) 2018 Polar Research |
op_doi |
https://doi.org/10.3402/polar.v8i2.6813 |
container_title |
Polar Research |
container_volume |
8 |
container_issue |
2 |
container_start_page |
217 |
op_container_end_page |
236 |
_version_ |
1766161836385763328 |