New palaeomagnetic results from Late Paleozoic volcanic units along the western Gondwana margin in La Pampa, Argentina
Abstract Preliminary palaeomagnetic results from the Paleozoic volcanic units along the Gondwana margin in Argentina are presented. Even though we are still working on the palaeomagnetic data of the sampled section, these data are consistent with data from former studies carried out in the area. Mor...
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Springer Science and Business Media LLC
2009
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Online Access: | http://dx.doi.org/10.1186/bf03352898 https://link.springer.com/content/pdf/10.1186/BF03352898.pdf https://link.springer.com/article/10.1186/BF03352898/fulltext.html http://link.springer.com/content/pdf/10.1186/BF03352898 |
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crspringernat:10.1186/bf03352898 2023-05-15T16:19:41+02:00 New palaeomagnetic results from Late Paleozoic volcanic units along the western Gondwana margin in La Pampa, Argentina Tomezzoli, Renata Nela Pierre, Teresa Saint Valenzuela, Claudia 2009 http://dx.doi.org/10.1186/bf03352898 https://link.springer.com/content/pdf/10.1186/BF03352898.pdf https://link.springer.com/article/10.1186/BF03352898/fulltext.html http://link.springer.com/content/pdf/10.1186/BF03352898 en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0/ https://creativecommons.org/licenses/by/4.0/ CC-BY Earth, Planets and Space volume 61, issue 1, page 183-189 ISSN 1343-8832 1880-5981 Space and Planetary Science Geology journal-article 2009 crspringernat https://doi.org/10.1186/bf03352898 2022-01-04T15:33:40Z Abstract Preliminary palaeomagnetic results from the Paleozoic volcanic units along the Gondwana margin in Argentina are presented. Even though we are still working on the palaeomagnetic data of the sampled section, these data are consistent with data from former studies carried out in the area. More than 90 specimens were measured from the Sierra Chica locality (37°52′S; 65°27′W) computed in 11 sites (Sc1-Sc11). These rocks are carriers of a characteristic remanence magnetization with reverse polarity, acquired during the Early Permian and assigned to the Kiaman Superchron. The resulting palaeomagnetic pole (PP) is Lat.: 64°S; Long.: 017°E, A 95 = 15°, K = 12, N = 10. Others interpretations are also possible if the directions of two sites (SC9 and SC10) are considered to have a different magnetic field record. In that case, the PP calculated for sites Sc1-Sc7 is Lat.: 65°S; Long.: 44°E, A 95 = 8°, K = 54, N = 7, and the virtual geomagnetic pole (VGP) calculated for sites Sc9 and Sc10 is Lat.: 48.5°S; Long.: 315°E, A 95 = 8°, N = 2. The last possibility to consider Sc9 and Sc10 after structural correction, and the resulting PP position is Lat.: 66.5°S; Long.: 034°E, A 95 = 8°, K = 41, N = 9. This deformation episode could be related to the San Rafaelic orogenic phase, found for the first time in La Pampa province, but previously observed in other neighboring areas during Permian time. However, more detailed palaeomagnetic sampling, rock magnetism studies, and age dating are necessary to complete the palaeomagnetic study of this area. Article in Journal/Newspaper Geomagnetic Pole Springer Nature (via Crossref) Argentina Chica ENVELOPE(-57.050,-57.050,-63.350,-63.350) Pampa ENVELOPE(-57.216,-57.216,-63.883,-63.883) Earth, Planets and Space 61 1 183 189 |
institution |
Open Polar |
collection |
Springer Nature (via Crossref) |
op_collection_id |
crspringernat |
language |
English |
topic |
Space and Planetary Science Geology |
spellingShingle |
Space and Planetary Science Geology Tomezzoli, Renata Nela Pierre, Teresa Saint Valenzuela, Claudia New palaeomagnetic results from Late Paleozoic volcanic units along the western Gondwana margin in La Pampa, Argentina |
topic_facet |
Space and Planetary Science Geology |
description |
Abstract Preliminary palaeomagnetic results from the Paleozoic volcanic units along the Gondwana margin in Argentina are presented. Even though we are still working on the palaeomagnetic data of the sampled section, these data are consistent with data from former studies carried out in the area. More than 90 specimens were measured from the Sierra Chica locality (37°52′S; 65°27′W) computed in 11 sites (Sc1-Sc11). These rocks are carriers of a characteristic remanence magnetization with reverse polarity, acquired during the Early Permian and assigned to the Kiaman Superchron. The resulting palaeomagnetic pole (PP) is Lat.: 64°S; Long.: 017°E, A 95 = 15°, K = 12, N = 10. Others interpretations are also possible if the directions of two sites (SC9 and SC10) are considered to have a different magnetic field record. In that case, the PP calculated for sites Sc1-Sc7 is Lat.: 65°S; Long.: 44°E, A 95 = 8°, K = 54, N = 7, and the virtual geomagnetic pole (VGP) calculated for sites Sc9 and Sc10 is Lat.: 48.5°S; Long.: 315°E, A 95 = 8°, N = 2. The last possibility to consider Sc9 and Sc10 after structural correction, and the resulting PP position is Lat.: 66.5°S; Long.: 034°E, A 95 = 8°, K = 41, N = 9. This deformation episode could be related to the San Rafaelic orogenic phase, found for the first time in La Pampa province, but previously observed in other neighboring areas during Permian time. However, more detailed palaeomagnetic sampling, rock magnetism studies, and age dating are necessary to complete the palaeomagnetic study of this area. |
format |
Article in Journal/Newspaper |
author |
Tomezzoli, Renata Nela Pierre, Teresa Saint Valenzuela, Claudia |
author_facet |
Tomezzoli, Renata Nela Pierre, Teresa Saint Valenzuela, Claudia |
author_sort |
Tomezzoli, Renata Nela |
title |
New palaeomagnetic results from Late Paleozoic volcanic units along the western Gondwana margin in La Pampa, Argentina |
title_short |
New palaeomagnetic results from Late Paleozoic volcanic units along the western Gondwana margin in La Pampa, Argentina |
title_full |
New palaeomagnetic results from Late Paleozoic volcanic units along the western Gondwana margin in La Pampa, Argentina |
title_fullStr |
New palaeomagnetic results from Late Paleozoic volcanic units along the western Gondwana margin in La Pampa, Argentina |
title_full_unstemmed |
New palaeomagnetic results from Late Paleozoic volcanic units along the western Gondwana margin in La Pampa, Argentina |
title_sort |
new palaeomagnetic results from late paleozoic volcanic units along the western gondwana margin in la pampa, argentina |
publisher |
Springer Science and Business Media LLC |
publishDate |
2009 |
url |
http://dx.doi.org/10.1186/bf03352898 https://link.springer.com/content/pdf/10.1186/BF03352898.pdf https://link.springer.com/article/10.1186/BF03352898/fulltext.html http://link.springer.com/content/pdf/10.1186/BF03352898 |
long_lat |
ENVELOPE(-57.050,-57.050,-63.350,-63.350) ENVELOPE(-57.216,-57.216,-63.883,-63.883) |
geographic |
Argentina Chica Pampa |
geographic_facet |
Argentina Chica Pampa |
genre |
Geomagnetic Pole |
genre_facet |
Geomagnetic Pole |
op_source |
Earth, Planets and Space volume 61, issue 1, page 183-189 ISSN 1343-8832 1880-5981 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1186/bf03352898 |
container_title |
Earth, Planets and Space |
container_volume |
61 |
container_issue |
1 |
container_start_page |
183 |
op_container_end_page |
189 |
_version_ |
1766006088352661504 |