Constriction structures related to viscous collision, southern Prince Charles Mountains, Antarctica
Macroscopic structures are investigated in a zone of highly contorted migmatites from the southern Prince Charles Mountains, Antarctica. Here, L-tectonite fabrics, rods, mullions, boudin pods, elongate enclaves, and fold hinges, are persistent linear features all plunging gently to the northeast. In...
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ftjamescook:oai:researchonline.jcu.edu.au:46100 2024-02-11T09:55:49+01:00 Constriction structures related to viscous collision, southern Prince Charles Mountains, Antarctica Corvino, Adrian F. Boger, Steven D. Fay, Clement 2016 application/pdf https://researchonline.jcu.edu.au/46100/1/46100%20Corvino%20et%20al%202016.pdf unknown Elsevier http://dx.doi.org/10.1016/j.jsg.2016.08.005 https://researchonline.jcu.edu.au/46100/ https://researchonline.jcu.edu.au/46100/1/46100%20Corvino%20et%20al%202016.pdf Corvino, Adrian F., Boger, Steven D., and Fay, Clement (2016) Constriction structures related to viscous collision, southern Prince Charles Mountains, Antarctica. Journal of Structural Geology, 90. pp. 128-143. restricted Article PeerReviewed 2016 ftjamescook https://doi.org/10.1016/j.jsg.2016.08.005 2024-01-22T23:38:33Z Macroscopic structures are investigated in a zone of highly contorted migmatites from the southern Prince Charles Mountains, Antarctica. Here, L-tectonite fabrics, rods, mullions, boudin pods, elongate enclaves, and fold hinges, are persistent linear features all plunging gently to the northeast. In contrast, amoeboid folds, ptygmatic folds and folded boudins with different orientations are the characteristic structures in transverse sections (perpendicular to the lineation). No consistent shear sense is recognised in any dimension. Together with strain and shape analysis, these observations strongly suggest that the deformation pattern is one of folding and stretching by constriction. Previous timing constraints indicate that this deformation overlapped with the waning stages of anatexis during decompression at approximately 510 Ma, up to 30 million years after initial orogeny at 540 Ma. The zone affected by constriction is several kilometres wide and has a contorted flower-like shape confined between two broad domal antiforms. In this context, the constricted zone is interpreted as a relatively late tectonic feature that could have formed via deep-seated viscous collision in response to orogenic collapse and doming. Article in Journal/Newspaper Antarc* Antarctica Antarctica Journal Prince Charles Mountains James Cook University, Australia: ResearchOnline@JCU Prince Charles Mountains ENVELOPE(67.246,67.246,-71.427,-71.427) Journal of Structural Geology 90 128 143 |
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Open Polar |
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James Cook University, Australia: ResearchOnline@JCU |
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ftjamescook |
language |
unknown |
description |
Macroscopic structures are investigated in a zone of highly contorted migmatites from the southern Prince Charles Mountains, Antarctica. Here, L-tectonite fabrics, rods, mullions, boudin pods, elongate enclaves, and fold hinges, are persistent linear features all plunging gently to the northeast. In contrast, amoeboid folds, ptygmatic folds and folded boudins with different orientations are the characteristic structures in transverse sections (perpendicular to the lineation). No consistent shear sense is recognised in any dimension. Together with strain and shape analysis, these observations strongly suggest that the deformation pattern is one of folding and stretching by constriction. Previous timing constraints indicate that this deformation overlapped with the waning stages of anatexis during decompression at approximately 510 Ma, up to 30 million years after initial orogeny at 540 Ma. The zone affected by constriction is several kilometres wide and has a contorted flower-like shape confined between two broad domal antiforms. In this context, the constricted zone is interpreted as a relatively late tectonic feature that could have formed via deep-seated viscous collision in response to orogenic collapse and doming. |
format |
Article in Journal/Newspaper |
author |
Corvino, Adrian F. Boger, Steven D. Fay, Clement |
spellingShingle |
Corvino, Adrian F. Boger, Steven D. Fay, Clement Constriction structures related to viscous collision, southern Prince Charles Mountains, Antarctica |
author_facet |
Corvino, Adrian F. Boger, Steven D. Fay, Clement |
author_sort |
Corvino, Adrian F. |
title |
Constriction structures related to viscous collision, southern Prince Charles Mountains, Antarctica |
title_short |
Constriction structures related to viscous collision, southern Prince Charles Mountains, Antarctica |
title_full |
Constriction structures related to viscous collision, southern Prince Charles Mountains, Antarctica |
title_fullStr |
Constriction structures related to viscous collision, southern Prince Charles Mountains, Antarctica |
title_full_unstemmed |
Constriction structures related to viscous collision, southern Prince Charles Mountains, Antarctica |
title_sort |
constriction structures related to viscous collision, southern prince charles mountains, antarctica |
publisher |
Elsevier |
publishDate |
2016 |
url |
https://researchonline.jcu.edu.au/46100/1/46100%20Corvino%20et%20al%202016.pdf |
long_lat |
ENVELOPE(67.246,67.246,-71.427,-71.427) |
geographic |
Prince Charles Mountains |
geographic_facet |
Prince Charles Mountains |
genre |
Antarc* Antarctica Antarctica Journal Prince Charles Mountains |
genre_facet |
Antarc* Antarctica Antarctica Journal Prince Charles Mountains |
op_relation |
http://dx.doi.org/10.1016/j.jsg.2016.08.005 https://researchonline.jcu.edu.au/46100/ https://researchonline.jcu.edu.au/46100/1/46100%20Corvino%20et%20al%202016.pdf Corvino, Adrian F., Boger, Steven D., and Fay, Clement (2016) Constriction structures related to viscous collision, southern Prince Charles Mountains, Antarctica. Journal of Structural Geology, 90. pp. 128-143. |
op_rights |
restricted |
op_doi |
https://doi.org/10.1016/j.jsg.2016.08.005 |
container_title |
Journal of Structural Geology |
container_volume |
90 |
container_start_page |
128 |
op_container_end_page |
143 |
_version_ |
1790598977218936832 |