Cambro-Ordovician palaeomagnetic and geochronologic data from southern Victoria Land, Antarctica: revision of the Gondwana apparent polar wander path
We present new palaeomagnetic and isotopic data from the southern Victoria Land region of the Transantarctic Mountains in East Antarctica that constrain the palaeogeographic position of this region during the Late Cambrian and Early Ordovician. A new pole has been determined from a dioritic intrusio...
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fthighwire:oai:open-archive.highwire.org:gji:141/2/392 2023-05-15T13:52:12+02:00 Cambro-Ordovician palaeomagnetic and geochronologic data from southern Victoria Land, Antarctica: revision of the Gondwana apparent polar wander path Grunow, Anne M. Encarnación, John P. 2000-05-01 00:00:00.0 text/html http://gji.oxfordjournals.org/cgi/content/short/141/2/392 https://doi.org/10.1046/j.1365-246x.2000.00083.x en eng Oxford University Press http://gji.oxfordjournals.org/cgi/content/short/141/2/392 http://dx.doi.org/10.1046/j.1365-246x.2000.00083.x Copyright (C) 2000, Oxford University Press Articles TEXT 2000 fthighwire https://doi.org/10.1046/j.1365-246x.2000.00083.x 2013-05-27T18:05:41Z We present new palaeomagnetic and isotopic data from the southern Victoria Land region of the Transantarctic Mountains in East Antarctica that constrain the palaeogeographic position of this region during the Late Cambrian and Early Ordovician. A new pole has been determined from a dioritic intrusion at Killer Ridge (40Ar/39Ar biotite age of 499±3 Ma) and hornblende diorite dykes at Mt. Loke (21°E, 7°S, A 95 = °, N = VGPs). The new Killer Ridge/Mt. Loke pole is indistinguishable from Gondwana Late Cambrian and Early Ordovician poles. Previously reported palaeomagnetic poles from southern Victoria Land have new isotopic age constraints that place them in the Late Cambrian rather than the Early Ordovician. Based upon the new palaeomagnetic and isotopic data, new Gondwana Late Cambrian and Early Ordovician mean poles have been calculated. Text Antarc* Antarctica East Antarctica Victoria Land HighWire Press (Stanford University) East Antarctica Victoria Land Transantarctic Mountains Loke ENVELOPE(162.550,162.550,-77.483,-77.483) Killer Ridge ENVELOPE(162.100,162.100,-77.200,-77.200) Geophysical Journal International 141 2 392 400 |
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HighWire Press (Stanford University) |
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English |
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Articles |
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Articles Grunow, Anne M. Encarnación, John P. Cambro-Ordovician palaeomagnetic and geochronologic data from southern Victoria Land, Antarctica: revision of the Gondwana apparent polar wander path |
topic_facet |
Articles |
description |
We present new palaeomagnetic and isotopic data from the southern Victoria Land region of the Transantarctic Mountains in East Antarctica that constrain the palaeogeographic position of this region during the Late Cambrian and Early Ordovician. A new pole has been determined from a dioritic intrusion at Killer Ridge (40Ar/39Ar biotite age of 499±3 Ma) and hornblende diorite dykes at Mt. Loke (21°E, 7°S, A 95 = °, N = VGPs). The new Killer Ridge/Mt. Loke pole is indistinguishable from Gondwana Late Cambrian and Early Ordovician poles. Previously reported palaeomagnetic poles from southern Victoria Land have new isotopic age constraints that place them in the Late Cambrian rather than the Early Ordovician. Based upon the new palaeomagnetic and isotopic data, new Gondwana Late Cambrian and Early Ordovician mean poles have been calculated. |
format |
Text |
author |
Grunow, Anne M. Encarnación, John P. |
author_facet |
Grunow, Anne M. Encarnación, John P. |
author_sort |
Grunow, Anne M. |
title |
Cambro-Ordovician palaeomagnetic and geochronologic data from southern Victoria Land, Antarctica: revision of the Gondwana apparent polar wander path |
title_short |
Cambro-Ordovician palaeomagnetic and geochronologic data from southern Victoria Land, Antarctica: revision of the Gondwana apparent polar wander path |
title_full |
Cambro-Ordovician palaeomagnetic and geochronologic data from southern Victoria Land, Antarctica: revision of the Gondwana apparent polar wander path |
title_fullStr |
Cambro-Ordovician palaeomagnetic and geochronologic data from southern Victoria Land, Antarctica: revision of the Gondwana apparent polar wander path |
title_full_unstemmed |
Cambro-Ordovician palaeomagnetic and geochronologic data from southern Victoria Land, Antarctica: revision of the Gondwana apparent polar wander path |
title_sort |
cambro-ordovician palaeomagnetic and geochronologic data from southern victoria land, antarctica: revision of the gondwana apparent polar wander path |
publisher |
Oxford University Press |
publishDate |
2000 |
url |
http://gji.oxfordjournals.org/cgi/content/short/141/2/392 https://doi.org/10.1046/j.1365-246x.2000.00083.x |
long_lat |
ENVELOPE(162.550,162.550,-77.483,-77.483) ENVELOPE(162.100,162.100,-77.200,-77.200) |
geographic |
East Antarctica Victoria Land Transantarctic Mountains Loke Killer Ridge |
geographic_facet |
East Antarctica Victoria Land Transantarctic Mountains Loke Killer Ridge |
genre |
Antarc* Antarctica East Antarctica Victoria Land |
genre_facet |
Antarc* Antarctica East Antarctica Victoria Land |
op_relation |
http://gji.oxfordjournals.org/cgi/content/short/141/2/392 http://dx.doi.org/10.1046/j.1365-246x.2000.00083.x |
op_rights |
Copyright (C) 2000, Oxford University Press |
op_doi |
https://doi.org/10.1046/j.1365-246x.2000.00083.x |
container_title |
Geophysical Journal International |
container_volume |
141 |
container_issue |
2 |
container_start_page |
392 |
op_container_end_page |
400 |
_version_ |
1766256466591744000 |