Strain-induced mineral growth in ductile shear zones and a preliminary study of ductile shearing in western Newfoundland
In the Fleur de Lys and the Central Gneiss terranes the presence of strain-induced mineral growth characteristic of ductile shear zones within zones of rocks with mylonitic fabrics indicates the existence of major belts of layer-parallel ductile shearing with complex evolutionary sequences. Kinemati...
Published in: | Canadian Journal of Earth Sciences |
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Canadian Science Publishing
1988
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Online Access: | http://dx.doi.org/10.1139/e88-195 http://www.nrcresearchpress.com/doi/pdf/10.1139/e88-195 |
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crcansciencepubl:10.1139/e88-195 2023-12-17T10:27:38+01:00 Strain-induced mineral growth in ductile shear zones and a preliminary study of ductile shearing in western Newfoundland Piasecki, M. A. J. 1988 http://dx.doi.org/10.1139/e88-195 http://www.nrcresearchpress.com/doi/pdf/10.1139/e88-195 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 25, issue 12, page 2118-2129 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1988 crcansciencepubl https://doi.org/10.1139/e88-195 2023-11-19T13:39:23Z In the Fleur de Lys and the Central Gneiss terranes the presence of strain-induced mineral growth characteristic of ductile shear zones within zones of rocks with mylonitic fabrics indicates the existence of major belts of layer-parallel ductile shearing with complex evolutionary sequences. Kinematic markers in several of these shear belts indicate that shearing movements on initially probably gently inclined surfaces, directed not normal to the axial trend of the orogen but parallel to it, are tectonically important in western Newfoundland. The shear belts are in excess of 1 km thick, and one well-exposed example exhibits a pattern in which zones of the highest strain anastomose on the map scale.The base of the Fleur de Lys Supergroup is marked by one such major zone of shearing (décollement) in which kinematic indicators record movements directed to the north and to the south, before the regional attitude of the rocks was steepened. Along the Baie Verte Line, earlier north- and south-directed movements in the Fleur de Lys were succeeded by reverse movements towards the east, over the Dunnage Terrane. Article in Journal/Newspaper Baie Verte Newfoundland Canadian Science Publishing (via Crossref) Verte ENVELOPE(141.192,141.192,-66.740,-66.740) Baie Verte ENVELOPE(-56.182,-56.182,49.933,49.933) Fleur de Lys ENVELOPE(-56.131,-56.131,50.117,50.117) Canadian Journal of Earth Sciences 25 12 2118 2129 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Piasecki, M. A. J. Strain-induced mineral growth in ductile shear zones and a preliminary study of ductile shearing in western Newfoundland |
topic_facet |
General Earth and Planetary Sciences |
description |
In the Fleur de Lys and the Central Gneiss terranes the presence of strain-induced mineral growth characteristic of ductile shear zones within zones of rocks with mylonitic fabrics indicates the existence of major belts of layer-parallel ductile shearing with complex evolutionary sequences. Kinematic markers in several of these shear belts indicate that shearing movements on initially probably gently inclined surfaces, directed not normal to the axial trend of the orogen but parallel to it, are tectonically important in western Newfoundland. The shear belts are in excess of 1 km thick, and one well-exposed example exhibits a pattern in which zones of the highest strain anastomose on the map scale.The base of the Fleur de Lys Supergroup is marked by one such major zone of shearing (décollement) in which kinematic indicators record movements directed to the north and to the south, before the regional attitude of the rocks was steepened. Along the Baie Verte Line, earlier north- and south-directed movements in the Fleur de Lys were succeeded by reverse movements towards the east, over the Dunnage Terrane. |
format |
Article in Journal/Newspaper |
author |
Piasecki, M. A. J. |
author_facet |
Piasecki, M. A. J. |
author_sort |
Piasecki, M. A. J. |
title |
Strain-induced mineral growth in ductile shear zones and a preliminary study of ductile shearing in western Newfoundland |
title_short |
Strain-induced mineral growth in ductile shear zones and a preliminary study of ductile shearing in western Newfoundland |
title_full |
Strain-induced mineral growth in ductile shear zones and a preliminary study of ductile shearing in western Newfoundland |
title_fullStr |
Strain-induced mineral growth in ductile shear zones and a preliminary study of ductile shearing in western Newfoundland |
title_full_unstemmed |
Strain-induced mineral growth in ductile shear zones and a preliminary study of ductile shearing in western Newfoundland |
title_sort |
strain-induced mineral growth in ductile shear zones and a preliminary study of ductile shearing in western newfoundland |
publisher |
Canadian Science Publishing |
publishDate |
1988 |
url |
http://dx.doi.org/10.1139/e88-195 http://www.nrcresearchpress.com/doi/pdf/10.1139/e88-195 |
long_lat |
ENVELOPE(141.192,141.192,-66.740,-66.740) ENVELOPE(-56.182,-56.182,49.933,49.933) ENVELOPE(-56.131,-56.131,50.117,50.117) |
geographic |
Verte Baie Verte Fleur de Lys |
geographic_facet |
Verte Baie Verte Fleur de Lys |
genre |
Baie Verte Newfoundland |
genre_facet |
Baie Verte Newfoundland |
op_source |
Canadian Journal of Earth Sciences volume 25, issue 12, page 2118-2129 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e88-195 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
25 |
container_issue |
12 |
container_start_page |
2118 |
op_container_end_page |
2129 |
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1785579557576769536 |