Palaeozoic to Mesozoic polyphase deformation of the Patuxent Range, Pensacola Mountains, Antarctica
The Patuxent Range forms the most southerly third of the Pensacola Mountains, East Antarctica. Largely unstudied since the original geological survey work of the 1960s, the Patuxent Range was thought to expose metasediments deformed by a single Precambrian event. However, new structural data collect...
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Cambridge University Press
2002
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ftnerc:oai:nora.nerc.ac.uk:13261 2023-05-15T13:45:11+02:00 Palaeozoic to Mesozoic polyphase deformation of the Patuxent Range, Pensacola Mountains, Antarctica Curtis, Michael L. 2002 http://nora.nerc.ac.uk/id/eprint/13261/ http://www.esaim-cocv.org/action/displayAbstract?fromPage=online&aid=217017 unknown Cambridge University Press Curtis, Michael L. 2002 Palaeozoic to Mesozoic polyphase deformation of the Patuxent Range, Pensacola Mountains, Antarctica. Antarctic Science, 14 (2). 175-183. https://doi.org/10.1017/S0954102002000743 <https://doi.org/10.1017/S0954102002000743> Earth Sciences Publication - Article PeerReviewed 2002 ftnerc https://doi.org/10.1017/S0954102002000743 2023-02-04T19:28:30Z The Patuxent Range forms the most southerly third of the Pensacola Mountains, East Antarctica. Largely unstudied since the original geological survey work of the 1960s, the Patuxent Range was thought to expose metasediments deformed by a single Precambrian event. However, new structural data collected from two geographically separate areas in the central Patuxent Range reveal the presence of three distinct generations of structures. A synthesis of the regional geology together with new data suggests that the Patuxent Formation was mildly deformed during end Cambrian times as part of the late stage Ross Orogeny. However, the most intense deformation, although poorly constrained in age, probably occurred during the Permo-Triassic Gondwanian Orogeny. A third phase of deformation predates the intrusion of 183 Ma lamprophyre dykes and involved an inferred vertical axis rotation of the pre-existing D-1 and D-2 structures and the localized development of a spaced foliation and mesoscale folding. These D-3 structures may be the first evidence of an Early Jurassic deformation event in the Transantarctic Mountains, which correlates with the Peninsula and Rangitata I orogenies of the Antarctic Peninsula and New Zealand, respectively. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctic Science Antarctica East Antarctica Natural Environment Research Council: NERC Open Research Archive Antarctic Antarctic Peninsula East Antarctica New Zealand Patuxent Range ENVELOPE(-64.500,-64.500,-84.716,-84.716) Pensacola Mountains ENVELOPE(-58.000,-58.000,-83.500,-83.500) The Antarctic Transantarctic Mountains Antarctic Science 14 2 175 183 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
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unknown |
topic |
Earth Sciences |
spellingShingle |
Earth Sciences Curtis, Michael L. Palaeozoic to Mesozoic polyphase deformation of the Patuxent Range, Pensacola Mountains, Antarctica |
topic_facet |
Earth Sciences |
description |
The Patuxent Range forms the most southerly third of the Pensacola Mountains, East Antarctica. Largely unstudied since the original geological survey work of the 1960s, the Patuxent Range was thought to expose metasediments deformed by a single Precambrian event. However, new structural data collected from two geographically separate areas in the central Patuxent Range reveal the presence of three distinct generations of structures. A synthesis of the regional geology together with new data suggests that the Patuxent Formation was mildly deformed during end Cambrian times as part of the late stage Ross Orogeny. However, the most intense deformation, although poorly constrained in age, probably occurred during the Permo-Triassic Gondwanian Orogeny. A third phase of deformation predates the intrusion of 183 Ma lamprophyre dykes and involved an inferred vertical axis rotation of the pre-existing D-1 and D-2 structures and the localized development of a spaced foliation and mesoscale folding. These D-3 structures may be the first evidence of an Early Jurassic deformation event in the Transantarctic Mountains, which correlates with the Peninsula and Rangitata I orogenies of the Antarctic Peninsula and New Zealand, respectively. |
format |
Article in Journal/Newspaper |
author |
Curtis, Michael L. |
author_facet |
Curtis, Michael L. |
author_sort |
Curtis, Michael L. |
title |
Palaeozoic to Mesozoic polyphase deformation of the Patuxent Range, Pensacola Mountains, Antarctica |
title_short |
Palaeozoic to Mesozoic polyphase deformation of the Patuxent Range, Pensacola Mountains, Antarctica |
title_full |
Palaeozoic to Mesozoic polyphase deformation of the Patuxent Range, Pensacola Mountains, Antarctica |
title_fullStr |
Palaeozoic to Mesozoic polyphase deformation of the Patuxent Range, Pensacola Mountains, Antarctica |
title_full_unstemmed |
Palaeozoic to Mesozoic polyphase deformation of the Patuxent Range, Pensacola Mountains, Antarctica |
title_sort |
palaeozoic to mesozoic polyphase deformation of the patuxent range, pensacola mountains, antarctica |
publisher |
Cambridge University Press |
publishDate |
2002 |
url |
http://nora.nerc.ac.uk/id/eprint/13261/ http://www.esaim-cocv.org/action/displayAbstract?fromPage=online&aid=217017 |
long_lat |
ENVELOPE(-64.500,-64.500,-84.716,-84.716) ENVELOPE(-58.000,-58.000,-83.500,-83.500) |
geographic |
Antarctic Antarctic Peninsula East Antarctica New Zealand Patuxent Range Pensacola Mountains The Antarctic Transantarctic Mountains |
geographic_facet |
Antarctic Antarctic Peninsula East Antarctica New Zealand Patuxent Range Pensacola Mountains The Antarctic Transantarctic Mountains |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctic Science Antarctica East Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctic Science Antarctica East Antarctica |
op_relation |
Curtis, Michael L. 2002 Palaeozoic to Mesozoic polyphase deformation of the Patuxent Range, Pensacola Mountains, Antarctica. Antarctic Science, 14 (2). 175-183. https://doi.org/10.1017/S0954102002000743 <https://doi.org/10.1017/S0954102002000743> |
op_doi |
https://doi.org/10.1017/S0954102002000743 |
container_title |
Antarctic Science |
container_volume |
14 |
container_issue |
2 |
container_start_page |
175 |
op_container_end_page |
183 |
_version_ |
1766215427271163904 |