Thermochronological ( 40 Ar/ 39 Ar) evidence of Early Palaeozoic basin inversion within the southern Prince Charles Mountains, East Antarctica: implications for East Gondwana
40 Ar/ 39 Ar systematics within metasedimentary rocks exposed in the southern Prince Charles Mountains, East Antarctica, were thermally reset during a period of Early Palaeozoic (between 524 ± 1 Ma and 486 ± 2 Ma) orogenesis. This event affected three temporally distinct (Archaean to Neoproterozoic)...
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Geological Society of London
2016
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Online Access: | https://dx.doi.org/10.6084/m9.figshare.3454400 https://geolsoc.figshare.com/articles/dataset/Thermochronological_sup_40_sup_Ar_sup_39_sup_Ar_evidence_of_Early_Palaeozoic_basin_inversion_within_the_southern_Prince_Charles_Mountains_East_Antarctica_implications___for_East_Gondwana/3454400 |
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ftdatacite:10.6084/m9.figshare.3454400 2023-05-15T13:34:28+02:00 Thermochronological ( 40 Ar/ 39 Ar) evidence of Early Palaeozoic basin inversion within the southern Prince Charles Mountains, East Antarctica: implications for East Gondwana Phillips, Glen Wilson, Christopher J.L. Phillips, David Szczepanski, Stan K. 2016 https://dx.doi.org/10.6084/m9.figshare.3454400 https://geolsoc.figshare.com/articles/dataset/Thermochronological_sup_40_sup_Ar_sup_39_sup_Ar_evidence_of_Early_Palaeozoic_basin_inversion_within_the_southern_Prince_Charles_Mountains_East_Antarctica_implications___for_East_Gondwana/3454400 unknown Geological Society of London https://dx.doi.org/10.1144/0016-76492006-073 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Geology FOS Earth and related environmental sciences dataset Dataset 2016 ftdatacite https://doi.org/10.6084/m9.figshare.3454400 https://doi.org/10.1144/0016-76492006-073 2021-11-05T12:55:41Z 40 Ar/ 39 Ar systematics within metasedimentary rocks exposed in the southern Prince Charles Mountains, East Antarctica, were thermally reset during a period of Early Palaeozoic (between 524 ± 1 Ma and 486 ± 2 Ma) orogenesis. This event affected three temporally distinct (Archaean to Neoproterozoic) stratigraphic levels that are now exposed in the upper crust. In the structural record, evidence of orogenesis during Early Palaeozoic times is preserved as late-stage, subvertical mylonite zones in the Archaean orthogneiss–metasedimentary basement and thin-skinned folding and thrusting of the overlying Neoproterozoic metasedimentary rocks. Synchronous cooling ages, contrasting structural styles and similar peak metamorphic conditions are interpreted as reflecting basement-involved thin-skinned deformation that was the result of inversion of a Neoproterozoic basin. The presence of pre-existing crustal heterogeneities is the mechanism that localized Early Palaeozoic orogenesis within the region. This interpretation differs from previous models that attribute Early Palaeozoic orogenesis within the southern Prince Charles Mountains to a collisional tectonic setting. An Early Palaeozoic intra-cratonic setting for the region suggests that amalgamation between India and Antarctica was likely to have occurred prior to the final construction of Gondwana. Dataset Antarc* Antarctica East Antarctica Prince Charles Mountains DataCite Metadata Store (German National Library of Science and Technology) East Antarctica Prince Charles Mountains ENVELOPE(67.246,67.246,-71.427,-71.427) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Geology FOS Earth and related environmental sciences |
spellingShingle |
Geology FOS Earth and related environmental sciences Phillips, Glen Wilson, Christopher J.L. Phillips, David Szczepanski, Stan K. Thermochronological ( 40 Ar/ 39 Ar) evidence of Early Palaeozoic basin inversion within the southern Prince Charles Mountains, East Antarctica: implications for East Gondwana |
topic_facet |
Geology FOS Earth and related environmental sciences |
description |
40 Ar/ 39 Ar systematics within metasedimentary rocks exposed in the southern Prince Charles Mountains, East Antarctica, were thermally reset during a period of Early Palaeozoic (between 524 ± 1 Ma and 486 ± 2 Ma) orogenesis. This event affected three temporally distinct (Archaean to Neoproterozoic) stratigraphic levels that are now exposed in the upper crust. In the structural record, evidence of orogenesis during Early Palaeozoic times is preserved as late-stage, subvertical mylonite zones in the Archaean orthogneiss–metasedimentary basement and thin-skinned folding and thrusting of the overlying Neoproterozoic metasedimentary rocks. Synchronous cooling ages, contrasting structural styles and similar peak metamorphic conditions are interpreted as reflecting basement-involved thin-skinned deformation that was the result of inversion of a Neoproterozoic basin. The presence of pre-existing crustal heterogeneities is the mechanism that localized Early Palaeozoic orogenesis within the region. This interpretation differs from previous models that attribute Early Palaeozoic orogenesis within the southern Prince Charles Mountains to a collisional tectonic setting. An Early Palaeozoic intra-cratonic setting for the region suggests that amalgamation between India and Antarctica was likely to have occurred prior to the final construction of Gondwana. |
format |
Dataset |
author |
Phillips, Glen Wilson, Christopher J.L. Phillips, David Szczepanski, Stan K. |
author_facet |
Phillips, Glen Wilson, Christopher J.L. Phillips, David Szczepanski, Stan K. |
author_sort |
Phillips, Glen |
title |
Thermochronological ( 40 Ar/ 39 Ar) evidence of Early Palaeozoic basin inversion within the southern Prince Charles Mountains, East Antarctica: implications for East Gondwana |
title_short |
Thermochronological ( 40 Ar/ 39 Ar) evidence of Early Palaeozoic basin inversion within the southern Prince Charles Mountains, East Antarctica: implications for East Gondwana |
title_full |
Thermochronological ( 40 Ar/ 39 Ar) evidence of Early Palaeozoic basin inversion within the southern Prince Charles Mountains, East Antarctica: implications for East Gondwana |
title_fullStr |
Thermochronological ( 40 Ar/ 39 Ar) evidence of Early Palaeozoic basin inversion within the southern Prince Charles Mountains, East Antarctica: implications for East Gondwana |
title_full_unstemmed |
Thermochronological ( 40 Ar/ 39 Ar) evidence of Early Palaeozoic basin inversion within the southern Prince Charles Mountains, East Antarctica: implications for East Gondwana |
title_sort |
thermochronological ( 40 ar/ 39 ar) evidence of early palaeozoic basin inversion within the southern prince charles mountains, east antarctica: implications for east gondwana |
publisher |
Geological Society of London |
publishDate |
2016 |
url |
https://dx.doi.org/10.6084/m9.figshare.3454400 https://geolsoc.figshare.com/articles/dataset/Thermochronological_sup_40_sup_Ar_sup_39_sup_Ar_evidence_of_Early_Palaeozoic_basin_inversion_within_the_southern_Prince_Charles_Mountains_East_Antarctica_implications___for_East_Gondwana/3454400 |
long_lat |
ENVELOPE(67.246,67.246,-71.427,-71.427) |
geographic |
East Antarctica Prince Charles Mountains |
geographic_facet |
East Antarctica Prince Charles Mountains |
genre |
Antarc* Antarctica East Antarctica Prince Charles Mountains |
genre_facet |
Antarc* Antarctica East Antarctica Prince Charles Mountains |
op_relation |
https://dx.doi.org/10.1144/0016-76492006-073 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.3454400 https://doi.org/10.1144/0016-76492006-073 |
_version_ |
1766053203754876928 |