Ductile shear zones related to crustal shortening and domain boundary evolution in the central Fennoscandian Shield
The Paleoproterozoic part of the Fennoscandian Shield is composed of crustal components formed in different tectonic settings and generally separated by well-defined shear zone systems. An anomalous transitional boundary has been investigated by integrating structural analysis and geochronology with...
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American Geophysical Union (AGU)
2009
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Online Access: | https://lup.lub.lu.se/record/1372676 https://doi.org/10.1029/2008TC002277 |
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ftulundlup:oai:lup.lub.lu.se:9fa9262b-f791-4c87-b982-053d90b34819 2023-05-15T16:12:50+02:00 Ductile shear zones related to crustal shortening and domain boundary evolution in the central Fennoscandian Shield Högdahl, Karin Sjostrom, Hakan Bergman, Stefan 2009 https://lup.lub.lu.se/record/1372676 https://doi.org/10.1029/2008TC002277 eng eng American Geophysical Union (AGU) https://lup.lub.lu.se/record/1372676 http://dx.doi.org/10.1029/2008TC002277 wos:000263180100001 scopus:67649588359 Tectonics; 28 (2009) ISSN: 0278-7407 Geology contributiontojournal/article info:eu-repo/semantics/article text 2009 ftulundlup https://doi.org/10.1029/2008TC002277 2023-02-01T23:26:40Z The Paleoproterozoic part of the Fennoscandian Shield is composed of crustal components formed in different tectonic settings and generally separated by well-defined shear zone systems. An anomalous transitional boundary has been investigated by integrating structural analysis and geochronology with published geophysical data. The nature of this boundary is interpreted to be a consequence of an apparent stacking in the lower and middle crust initiating 1.87-1.86 Ga dextral shear along the Gavle-Rattvik Zone (GRZ) and adjacent shear zones, resulting in an arcuate northern boundary of the Bergslagen province. This boundary coincides with geophysical anomalies and temporal and metamorphic breaks. Owing to continuous convergence the pure-shear overprint component increased on the GRZ and caused a shift of dextral shear to the Hagsta Gneiss Zone with recorded shear at 1809 +/- 2 Ma. Most likely, both these structures are related to coeval shear zones farther to the east as a part of an similar to 1500 km long crustal, or possibly terrane, boundary. Citation: Hogdahl, K., H. Sjostrom, and S. Bergman (2009), Ductile shear zones related to crustal shortening and domain boundary evolution in the central Fennoscandian Shield, Tectonics, 28, TC1003, doi:10.1029/2008TC002277. Article in Journal/Newspaper Fennoscandian Lund University Publications (LUP) Tectonics 28 1 n/a n/a |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Geology |
spellingShingle |
Geology Högdahl, Karin Sjostrom, Hakan Bergman, Stefan Ductile shear zones related to crustal shortening and domain boundary evolution in the central Fennoscandian Shield |
topic_facet |
Geology |
description |
The Paleoproterozoic part of the Fennoscandian Shield is composed of crustal components formed in different tectonic settings and generally separated by well-defined shear zone systems. An anomalous transitional boundary has been investigated by integrating structural analysis and geochronology with published geophysical data. The nature of this boundary is interpreted to be a consequence of an apparent stacking in the lower and middle crust initiating 1.87-1.86 Ga dextral shear along the Gavle-Rattvik Zone (GRZ) and adjacent shear zones, resulting in an arcuate northern boundary of the Bergslagen province. This boundary coincides with geophysical anomalies and temporal and metamorphic breaks. Owing to continuous convergence the pure-shear overprint component increased on the GRZ and caused a shift of dextral shear to the Hagsta Gneiss Zone with recorded shear at 1809 +/- 2 Ma. Most likely, both these structures are related to coeval shear zones farther to the east as a part of an similar to 1500 km long crustal, or possibly terrane, boundary. Citation: Hogdahl, K., H. Sjostrom, and S. Bergman (2009), Ductile shear zones related to crustal shortening and domain boundary evolution in the central Fennoscandian Shield, Tectonics, 28, TC1003, doi:10.1029/2008TC002277. |
format |
Article in Journal/Newspaper |
author |
Högdahl, Karin Sjostrom, Hakan Bergman, Stefan |
author_facet |
Högdahl, Karin Sjostrom, Hakan Bergman, Stefan |
author_sort |
Högdahl, Karin |
title |
Ductile shear zones related to crustal shortening and domain boundary evolution in the central Fennoscandian Shield |
title_short |
Ductile shear zones related to crustal shortening and domain boundary evolution in the central Fennoscandian Shield |
title_full |
Ductile shear zones related to crustal shortening and domain boundary evolution in the central Fennoscandian Shield |
title_fullStr |
Ductile shear zones related to crustal shortening and domain boundary evolution in the central Fennoscandian Shield |
title_full_unstemmed |
Ductile shear zones related to crustal shortening and domain boundary evolution in the central Fennoscandian Shield |
title_sort |
ductile shear zones related to crustal shortening and domain boundary evolution in the central fennoscandian shield |
publisher |
American Geophysical Union (AGU) |
publishDate |
2009 |
url |
https://lup.lub.lu.se/record/1372676 https://doi.org/10.1029/2008TC002277 |
genre |
Fennoscandian |
genre_facet |
Fennoscandian |
op_source |
Tectonics; 28 (2009) ISSN: 0278-7407 |
op_relation |
https://lup.lub.lu.se/record/1372676 http://dx.doi.org/10.1029/2008TC002277 wos:000263180100001 scopus:67649588359 |
op_doi |
https://doi.org/10.1029/2008TC002277 |
container_title |
Tectonics |
container_volume |
28 |
container_issue |
1 |
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n/a |
_version_ |
1765998444287098880 |