U–Pb geochronology of deformed metagranites in central Sutherland, Scotland: evidence for widespread late Silurian metamorphism and ductile deformation of the Moine Supergroup during the Caledonian orogeny
Abstract: Within the Caledonides of central Sutherland, Scotland, the Neoproterozoic metasedimentary rocks of the Moine Supergroup record NW-directed D2 ductile thrusting and nappe assembly, accompanied by widespread tight-to-isoclinal folding and amphibolite-facies metamorphism. A series of metagra...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.599.2919 2023-05-15T17:34:57+02:00 U–Pb geochronology of deformed metagranites in central Sutherland, Scotland: evidence for widespread late Silurian metamorphism and ductile deformation of the Moine Supergroup during the Caledonian orogeny P. D. Kinny R. A. Strachan C. R. L Friend H. Kocks G. Rogers The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.599.2919 http://eprints.gla.ac.uk/261/1/Kinny,Strachan.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.599.2919 http://eprints.gla.ac.uk/261/1/Kinny,Strachan.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://eprints.gla.ac.uk/261/1/Kinny,Strachan.pdf Scotland Moine Supergroup Caledonian orogeny zircons titanites metagranites. Caledonian orogenesis (sensu lato) in the North Atlantic region was assoc text ftciteseerx 2016-01-08T13:53:05Z Abstract: Within the Caledonides of central Sutherland, Scotland, the Neoproterozoic metasedimentary rocks of the Moine Supergroup record NW-directed D2 ductile thrusting and nappe assembly, accompanied by widespread tight-to-isoclinal folding and amphibolite-facies metamorphism. A series of metagranite sheets which were emplaced and penetratively deformed during D2 have been dated using SHRIMP U–Pb geochronology. Zircon ages of 424 8 Ma (Vagastie Bridge granite), 420 6 Ma (Klibreck granite) and 429 11 Ma (Strathnaver granite) are interpreted to date emplacement, and hence regional D2 deformation, during mid- to late Silurian time. Titanite ages of 413 3 Ma (Vagastie Bridge granite) and 416 3 Ma (Klibreck granite) are thought to date post-metamorphic cooling through a blocking temperature of c. 550– 500 8C. A mid- to late Silurian age for D2 deformation supports published models that have viewed the internal ductile thrusts of this part of the orogen as part of the same kinematically linked system of foreland-propagating thrusts as the marginal Moine Thrust Zone. The new data contrast with previous interpretations that have viewed the dominant structures and metamorphic assemblages within the Moine Supergroup as having formed during the early to mid-Ordovician Grampian arc–continent orogeny. The mid- to late Silurian D2 nappe stacking event in Sutherland is probably a result of the collision of Baltica with the Scottish segment Text North Atlantic Unknown Sutherland ENVELOPE(168.467,168.467,-77.500,-77.500) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
topic |
Scotland Moine Supergroup Caledonian orogeny zircons titanites metagranites. Caledonian orogenesis (sensu lato) in the North Atlantic region was assoc |
spellingShingle |
Scotland Moine Supergroup Caledonian orogeny zircons titanites metagranites. Caledonian orogenesis (sensu lato) in the North Atlantic region was assoc P. D. Kinny R. A. Strachan C. R. L Friend H. Kocks G. Rogers U–Pb geochronology of deformed metagranites in central Sutherland, Scotland: evidence for widespread late Silurian metamorphism and ductile deformation of the Moine Supergroup during the Caledonian orogeny |
topic_facet |
Scotland Moine Supergroup Caledonian orogeny zircons titanites metagranites. Caledonian orogenesis (sensu lato) in the North Atlantic region was assoc |
description |
Abstract: Within the Caledonides of central Sutherland, Scotland, the Neoproterozoic metasedimentary rocks of the Moine Supergroup record NW-directed D2 ductile thrusting and nappe assembly, accompanied by widespread tight-to-isoclinal folding and amphibolite-facies metamorphism. A series of metagranite sheets which were emplaced and penetratively deformed during D2 have been dated using SHRIMP U–Pb geochronology. Zircon ages of 424 8 Ma (Vagastie Bridge granite), 420 6 Ma (Klibreck granite) and 429 11 Ma (Strathnaver granite) are interpreted to date emplacement, and hence regional D2 deformation, during mid- to late Silurian time. Titanite ages of 413 3 Ma (Vagastie Bridge granite) and 416 3 Ma (Klibreck granite) are thought to date post-metamorphic cooling through a blocking temperature of c. 550– 500 8C. A mid- to late Silurian age for D2 deformation supports published models that have viewed the internal ductile thrusts of this part of the orogen as part of the same kinematically linked system of foreland-propagating thrusts as the marginal Moine Thrust Zone. The new data contrast with previous interpretations that have viewed the dominant structures and metamorphic assemblages within the Moine Supergroup as having formed during the early to mid-Ordovician Grampian arc–continent orogeny. The mid- to late Silurian D2 nappe stacking event in Sutherland is probably a result of the collision of Baltica with the Scottish segment |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
P. D. Kinny R. A. Strachan C. R. L Friend H. Kocks G. Rogers |
author_facet |
P. D. Kinny R. A. Strachan C. R. L Friend H. Kocks G. Rogers |
author_sort |
P. D. Kinny |
title |
U–Pb geochronology of deformed metagranites in central Sutherland, Scotland: evidence for widespread late Silurian metamorphism and ductile deformation of the Moine Supergroup during the Caledonian orogeny |
title_short |
U–Pb geochronology of deformed metagranites in central Sutherland, Scotland: evidence for widespread late Silurian metamorphism and ductile deformation of the Moine Supergroup during the Caledonian orogeny |
title_full |
U–Pb geochronology of deformed metagranites in central Sutherland, Scotland: evidence for widespread late Silurian metamorphism and ductile deformation of the Moine Supergroup during the Caledonian orogeny |
title_fullStr |
U–Pb geochronology of deformed metagranites in central Sutherland, Scotland: evidence for widespread late Silurian metamorphism and ductile deformation of the Moine Supergroup during the Caledonian orogeny |
title_full_unstemmed |
U–Pb geochronology of deformed metagranites in central Sutherland, Scotland: evidence for widespread late Silurian metamorphism and ductile deformation of the Moine Supergroup during the Caledonian orogeny |
title_sort |
u–pb geochronology of deformed metagranites in central sutherland, scotland: evidence for widespread late silurian metamorphism and ductile deformation of the moine supergroup during the caledonian orogeny |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.599.2919 http://eprints.gla.ac.uk/261/1/Kinny,Strachan.pdf |
long_lat |
ENVELOPE(168.467,168.467,-77.500,-77.500) |
geographic |
Sutherland |
geographic_facet |
Sutherland |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
http://eprints.gla.ac.uk/261/1/Kinny,Strachan.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.599.2919 http://eprints.gla.ac.uk/261/1/Kinny,Strachan.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766133945509871616 |