Devonian-Mississippian faulting controlled by WNW-ESE-striking structural grain in Proterozoic basement rocks in Billefjorden, central Spitsbergen
In Billefjorden, central Spitsbergen, Devonian collapse and Carboniferous rift-related sedimentary strata were deposited unconformably over Proterozoic basement rocks displaying well developed N-S-trending Caledonian grain. Caledonian structures and fabrics are thought to have controlled the locatio...
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Universitat de Barcelona
2023
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ftraco:oai:raco.cat:article/419233 2024-01-21T10:04:55+01:00 Devonian-Mississippian faulting controlled by WNW-ESE-striking structural grain in Proterozoic basement rocks in Billefjorden, central Spitsbergen Koehl, Jean-Baptiste P. Christophersen, Gard Collombin, Maxime Taule, Christoffer Stokmo, Eirik M.B. Allaart, Lis 2023 http://www.raco.cat/index.php/GeologicaActa/article/view/419233 unknown Universitat de Barcelona Universitat Autònoma de Barcelona Institut de Diagnosi Ambiental i Estudis de l'Aigua Institut de Geociències de Barcelona-CSIC Geologica Acta, 2023, 2023: Vol.: 21 http://www.raco.cat/index.php/GeologicaActa/article/view/419233/513539 http://www.raco.cat/index.php/GeologicaActa/article/view/419233 1696-5728 1695-6133 Drets d'autor 2023 J-B.P. Koehl, G. Christophersen, M. Collombin, C. Taule, E.M.B. Stockmo, L. Allaart, https://creativecommons.org/licenses/by-sa/4.0/ info:eu-repo/semantics/openAccess RACO (Revistes Catalanes amb Accés Obert) Faults Svalbard Devonian-Mississippian Timanian info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2023 ftraco 2023-12-27T00:53:18Z In Billefjorden, central Spitsbergen, Devonian collapse and Carboniferous rift-related sedimentary strata were deposited unconformably over Proterozoic basement rocks displaying well developed N-S-trending Caledonian grain. Caledonian structures and fabrics are thought to have controlled the location and trend of subsequent Devonian and Carboniferous basin-bounding faults like the Billefjorden fault zone and Lemströmfjellet–Løvehovden fault. However, fieldwork and interpretation of aerial photographs in Proterozoic basement rocks reveal the existence of steep, abundant, WNW-ESE-striking brittle faults that are sub-orthogonal to known major Caledonian and post-Caledonian structures in Billefjorden, but that do not extend into adjacent-overlying, rift-related, Pennsylvanian rocks of the Gipsdalen Group. Structural analysis of field data and aerial photographs suggest that WNW-ESE-striking faults in basement rocks in Billefjorden formed as (sinistral) strike-slip and normal faults during Devonian-Mississippian extension in agreement with previously inferred models of sinistral transtension. The abundance of these faults suggest that their formation was controlled by analogously trending, preexisting structural grain (planar anisotropies) at depth, and their pronounced WNW-ESE strike suggest that the strike of preexisting anisotropies were comparable to recently identified, crustal-scale, WNW-ESE-striking Timanian thrust systems in Svalbard and the northern Barents Sea. In Billefjorden, central Spitsbergen, Devonian collapse and Carboniferous rift-related sedimentary strata were deposited unconformably over Proterozoic basement rocks displaying well developed N-S-trending Caledonian grain. Caledonian structures and fabrics are thought to have controlled the location and trend of subsequent Devonian and Carboniferous basin-bounding faults like the Billefjorden fault zone and Lemströmfjellet–Løvehovden fault. However, fieldwork and interpretation of aerial photographs in Proterozoic basement rocks reveal the ... Article in Journal/Newspaper Barents Sea Billefjorden Svalbard Spitsbergen RACO: Revistes Catalanes amb Accés Obert Svalbard Barents Sea Billefjorden ENVELOPE(16.417,16.417,78.563,78.563) Gipsdalen ENVELOPE(16.877,16.877,78.505,78.505) Løvehovden ENVELOPE(16.632,16.632,78.721,78.721) Lemströmfjellet ENVELOPE(16.621,16.621,78.996,78.996) |
institution |
Open Polar |
collection |
RACO: Revistes Catalanes amb Accés Obert |
op_collection_id |
ftraco |
language |
unknown |
topic |
Faults Svalbard Devonian-Mississippian Timanian |
spellingShingle |
Faults Svalbard Devonian-Mississippian Timanian Koehl, Jean-Baptiste P. Christophersen, Gard Collombin, Maxime Taule, Christoffer Stokmo, Eirik M.B. Allaart, Lis Devonian-Mississippian faulting controlled by WNW-ESE-striking structural grain in Proterozoic basement rocks in Billefjorden, central Spitsbergen |
topic_facet |
Faults Svalbard Devonian-Mississippian Timanian |
description |
In Billefjorden, central Spitsbergen, Devonian collapse and Carboniferous rift-related sedimentary strata were deposited unconformably over Proterozoic basement rocks displaying well developed N-S-trending Caledonian grain. Caledonian structures and fabrics are thought to have controlled the location and trend of subsequent Devonian and Carboniferous basin-bounding faults like the Billefjorden fault zone and Lemströmfjellet–Løvehovden fault. However, fieldwork and interpretation of aerial photographs in Proterozoic basement rocks reveal the existence of steep, abundant, WNW-ESE-striking brittle faults that are sub-orthogonal to known major Caledonian and post-Caledonian structures in Billefjorden, but that do not extend into adjacent-overlying, rift-related, Pennsylvanian rocks of the Gipsdalen Group. Structural analysis of field data and aerial photographs suggest that WNW-ESE-striking faults in basement rocks in Billefjorden formed as (sinistral) strike-slip and normal faults during Devonian-Mississippian extension in agreement with previously inferred models of sinistral transtension. The abundance of these faults suggest that their formation was controlled by analogously trending, preexisting structural grain (planar anisotropies) at depth, and their pronounced WNW-ESE strike suggest that the strike of preexisting anisotropies were comparable to recently identified, crustal-scale, WNW-ESE-striking Timanian thrust systems in Svalbard and the northern Barents Sea. In Billefjorden, central Spitsbergen, Devonian collapse and Carboniferous rift-related sedimentary strata were deposited unconformably over Proterozoic basement rocks displaying well developed N-S-trending Caledonian grain. Caledonian structures and fabrics are thought to have controlled the location and trend of subsequent Devonian and Carboniferous basin-bounding faults like the Billefjorden fault zone and Lemströmfjellet–Løvehovden fault. However, fieldwork and interpretation of aerial photographs in Proterozoic basement rocks reveal the ... |
format |
Article in Journal/Newspaper |
author |
Koehl, Jean-Baptiste P. Christophersen, Gard Collombin, Maxime Taule, Christoffer Stokmo, Eirik M.B. Allaart, Lis |
author_facet |
Koehl, Jean-Baptiste P. Christophersen, Gard Collombin, Maxime Taule, Christoffer Stokmo, Eirik M.B. Allaart, Lis |
author_sort |
Koehl, Jean-Baptiste P. |
title |
Devonian-Mississippian faulting controlled by WNW-ESE-striking structural grain in Proterozoic basement rocks in Billefjorden, central Spitsbergen |
title_short |
Devonian-Mississippian faulting controlled by WNW-ESE-striking structural grain in Proterozoic basement rocks in Billefjorden, central Spitsbergen |
title_full |
Devonian-Mississippian faulting controlled by WNW-ESE-striking structural grain in Proterozoic basement rocks in Billefjorden, central Spitsbergen |
title_fullStr |
Devonian-Mississippian faulting controlled by WNW-ESE-striking structural grain in Proterozoic basement rocks in Billefjorden, central Spitsbergen |
title_full_unstemmed |
Devonian-Mississippian faulting controlled by WNW-ESE-striking structural grain in Proterozoic basement rocks in Billefjorden, central Spitsbergen |
title_sort |
devonian-mississippian faulting controlled by wnw-ese-striking structural grain in proterozoic basement rocks in billefjorden, central spitsbergen |
publisher |
Universitat de Barcelona |
publishDate |
2023 |
url |
http://www.raco.cat/index.php/GeologicaActa/article/view/419233 |
long_lat |
ENVELOPE(16.417,16.417,78.563,78.563) ENVELOPE(16.877,16.877,78.505,78.505) ENVELOPE(16.632,16.632,78.721,78.721) ENVELOPE(16.621,16.621,78.996,78.996) |
geographic |
Svalbard Barents Sea Billefjorden Gipsdalen Løvehovden Lemströmfjellet |
geographic_facet |
Svalbard Barents Sea Billefjorden Gipsdalen Løvehovden Lemströmfjellet |
genre |
Barents Sea Billefjorden Svalbard Spitsbergen |
genre_facet |
Barents Sea Billefjorden Svalbard Spitsbergen |
op_source |
RACO (Revistes Catalanes amb Accés Obert) |
op_relation |
Geologica Acta, 2023, 2023: Vol.: 21 http://www.raco.cat/index.php/GeologicaActa/article/view/419233/513539 http://www.raco.cat/index.php/GeologicaActa/article/view/419233 1696-5728 1695-6133 |
op_rights |
Drets d'autor 2023 J-B.P. Koehl, G. Christophersen, M. Collombin, C. Taule, E.M.B. Stockmo, L. Allaart, https://creativecommons.org/licenses/by-sa/4.0/ info:eu-repo/semantics/openAccess |
_version_ |
1788695301073141760 |