Ductile shear zones related to crustal shortening and domain boundary evolution in the central Fennoscandian Shield
(2009) In Tectonics 28.- Abstract
- 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... (More)
- 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. (Less)
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https://lup.lub.lu.se/record/1372676
- author
- Högdahl, Karin LU ; Sjostrom, Hakan and Bergman, Stefan
- organization
- publishing date
- 2009
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Tectonics
- volume
- 28
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- wos:000263180100001
- scopus:67649588359
- ISSN
- 0278-7407
- DOI
- 10.1029/2008TC002277
- language
- English
- LU publication?
- yes
- id
- 9fa9262b-f791-4c87-b982-053d90b34819 (old id 1372676)
- date added to LUP
- 2016-04-01 14:17:18
- date last changed
- 2025-01-03 22:20:16
@article{9fa9262b-f791-4c87-b982-053d90b34819,
abstract = {{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.}},
author = {{Högdahl, Karin and Sjostrom, Hakan and Bergman, Stefan}},
issn = {{0278-7407}},
language = {{eng}},
publisher = {{John Wiley & Sons Inc.}},
series = {{Tectonics}},
title = {{Ductile shear zones related to crustal shortening and domain boundary evolution in the central Fennoscandian Shield}},
url = {{http://dx.doi.org/10.1029/2008TC002277}},
doi = {{10.1029/2008TC002277}},
volume = {{28}},
year = {{2009}},
}