Palaeomagnetism of the Upper Carboniferous-Lower Permian transition from Paganzo basin, Argentina

Autores
Geuna, Silvana Evangelina; Escosteguy, Leonardo Darío
Año de publicación
2004
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A palaeomagnetic study of Upper Palaeozoic rocks was performed on Paganzo basin, central-western Argentina and its western extension, Río Blanco subbasin. The volcanic-volcaniclastic Rio del Peñón and marine sedimentary Punta del Agua formations were sampled in the Rincón Blanco syncline. Both units represent the Upper Carboniferous-Lower Permian transition according to palaeontological and geochronological evidence. The Chancani and Cerro Colorado-Caminiaga formations were sampled in their type localities, in the eastern Paganzo basin. All-reversed, pre-tectonic characteristic magnetizations were isolated in all three localities, spanning a wide lithological variation. Particularly in the Rincón Blanco syncline, the same reversed magnetization is observed in the entire 1500 m-thick sequence in volcanic and sedimentary rocks; at least part of the deformation there is thought to be Permian in age, related to the San Rafael orogenic phase (SROP). The palaeomagnetic poles are: Rincón Blanco (RB) Lat. 77°S, Long. 294°E, N = 19, A 95 = 4.9, K = 47; Chancaní (CH) Lat. 85°S, Long. 359°E, N = 3, A 95 = 8.8, K = 196; Cerro Colorado-Caminiaga (CC) Lat. 79°S, Long. 291°E, N = 6, A 95 = 8.0, K = 71. Neither of the poles is coincident with expected Late Carboniferous-Early Permian directions according to accepted apparent polar-wander paths (APWPs) from South America and from other plates forming Pangaea in Late Palaeozoic times. This discrepancy could be the result of: (i) polar wander affecting the western Gondwana margin, probably related to SROP; (ii) tectonic rotations related to strike-slip faults active in the area since the Palaeozoic and controlling the position of the main depocentres; (iii) incorrect age assignment for the sedimentary sequences or for the remanence acquisition, i.e. local remagnetizations. Tectonic rotations and local remagnetization have both been proven in particular localities and further work needs to be done to establish the Late Palaeozoic APWP for South America, however, SROP seems to have played a major role controlling both processes, rotation and remagnetization.
Fil: Geuna, Silvana Evangelina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Instituto de Geofísica "Daniel Valencio"; Argentina
Fil: Escosteguy, Leonardo Darío. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Secretaría de Industria y Minería. Servicio Geológico Minero Argentino; Argentina
Materia
BLOCK ROTATIONS
OROGENY
PALAEOMAGNETISM
REMAGNETIZATION
SOUTH AMERICA
UPPER PALAEOZOIC
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/83499

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network_name_str CONICET Digital (CONICET)
spelling Palaeomagnetism of the Upper Carboniferous-Lower Permian transition from Paganzo basin, ArgentinaGeuna, Silvana EvangelinaEscosteguy, Leonardo DaríoBLOCK ROTATIONSOROGENYPALAEOMAGNETISMREMAGNETIZATIONSOUTH AMERICAUPPER PALAEOZOIChttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1A palaeomagnetic study of Upper Palaeozoic rocks was performed on Paganzo basin, central-western Argentina and its western extension, Río Blanco subbasin. The volcanic-volcaniclastic Rio del Peñón and marine sedimentary Punta del Agua formations were sampled in the Rincón Blanco syncline. Both units represent the Upper Carboniferous-Lower Permian transition according to palaeontological and geochronological evidence. The Chancani and Cerro Colorado-Caminiaga formations were sampled in their type localities, in the eastern Paganzo basin. All-reversed, pre-tectonic characteristic magnetizations were isolated in all three localities, spanning a wide lithological variation. Particularly in the Rincón Blanco syncline, the same reversed magnetization is observed in the entire 1500 m-thick sequence in volcanic and sedimentary rocks; at least part of the deformation there is thought to be Permian in age, related to the San Rafael orogenic phase (SROP). The palaeomagnetic poles are: Rincón Blanco (RB) Lat. 77°S, Long. 294°E, N = 19, A 95 = 4.9, K = 47; Chancaní (CH) Lat. 85°S, Long. 359°E, N = 3, A 95 = 8.8, K = 196; Cerro Colorado-Caminiaga (CC) Lat. 79°S, Long. 291°E, N = 6, A 95 = 8.0, K = 71. Neither of the poles is coincident with expected Late Carboniferous-Early Permian directions according to accepted apparent polar-wander paths (APWPs) from South America and from other plates forming Pangaea in Late Palaeozoic times. This discrepancy could be the result of: (i) polar wander affecting the western Gondwana margin, probably related to SROP; (ii) tectonic rotations related to strike-slip faults active in the area since the Palaeozoic and controlling the position of the main depocentres; (iii) incorrect age assignment for the sedimentary sequences or for the remanence acquisition, i.e. local remagnetizations. Tectonic rotations and local remagnetization have both been proven in particular localities and further work needs to be done to establish the Late Palaeozoic APWP for South America, however, SROP seems to have played a major role controlling both processes, rotation and remagnetization.Fil: Geuna, Silvana Evangelina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Instituto de Geofísica "Daniel Valencio"; ArgentinaFil: Escosteguy, Leonardo Darío. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Secretaría de Industria y Minería. Servicio Geológico Minero Argentino; ArgentinaWiley Blackwell Publishing, Inc2004-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/83499Geuna, Silvana Evangelina; Escosteguy, Leonardo Darío; Palaeomagnetism of the Upper Carboniferous-Lower Permian transition from Paganzo basin, Argentina; Wiley Blackwell Publishing, Inc; Geophysical Journal International; 157; 3; 6-2004; 1071-10890956-540XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-246X.2004.02229.xinfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/gji/article/157/3/1071/568077info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:43:27Zoai:ri.conicet.gov.ar:11336/83499instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:43:28.004CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Palaeomagnetism of the Upper Carboniferous-Lower Permian transition from Paganzo basin, Argentina
title Palaeomagnetism of the Upper Carboniferous-Lower Permian transition from Paganzo basin, Argentina
spellingShingle Palaeomagnetism of the Upper Carboniferous-Lower Permian transition from Paganzo basin, Argentina
Geuna, Silvana Evangelina
BLOCK ROTATIONS
OROGENY
PALAEOMAGNETISM
REMAGNETIZATION
SOUTH AMERICA
UPPER PALAEOZOIC
title_short Palaeomagnetism of the Upper Carboniferous-Lower Permian transition from Paganzo basin, Argentina
title_full Palaeomagnetism of the Upper Carboniferous-Lower Permian transition from Paganzo basin, Argentina
title_fullStr Palaeomagnetism of the Upper Carboniferous-Lower Permian transition from Paganzo basin, Argentina
title_full_unstemmed Palaeomagnetism of the Upper Carboniferous-Lower Permian transition from Paganzo basin, Argentina
title_sort Palaeomagnetism of the Upper Carboniferous-Lower Permian transition from Paganzo basin, Argentina
dc.creator.none.fl_str_mv Geuna, Silvana Evangelina
Escosteguy, Leonardo Darío
author Geuna, Silvana Evangelina
author_facet Geuna, Silvana Evangelina
Escosteguy, Leonardo Darío
author_role author
author2 Escosteguy, Leonardo Darío
author2_role author
dc.subject.none.fl_str_mv BLOCK ROTATIONS
OROGENY
PALAEOMAGNETISM
REMAGNETIZATION
SOUTH AMERICA
UPPER PALAEOZOIC
topic BLOCK ROTATIONS
OROGENY
PALAEOMAGNETISM
REMAGNETIZATION
SOUTH AMERICA
UPPER PALAEOZOIC
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A palaeomagnetic study of Upper Palaeozoic rocks was performed on Paganzo basin, central-western Argentina and its western extension, Río Blanco subbasin. The volcanic-volcaniclastic Rio del Peñón and marine sedimentary Punta del Agua formations were sampled in the Rincón Blanco syncline. Both units represent the Upper Carboniferous-Lower Permian transition according to palaeontological and geochronological evidence. The Chancani and Cerro Colorado-Caminiaga formations were sampled in their type localities, in the eastern Paganzo basin. All-reversed, pre-tectonic characteristic magnetizations were isolated in all three localities, spanning a wide lithological variation. Particularly in the Rincón Blanco syncline, the same reversed magnetization is observed in the entire 1500 m-thick sequence in volcanic and sedimentary rocks; at least part of the deformation there is thought to be Permian in age, related to the San Rafael orogenic phase (SROP). The palaeomagnetic poles are: Rincón Blanco (RB) Lat. 77°S, Long. 294°E, N = 19, A 95 = 4.9, K = 47; Chancaní (CH) Lat. 85°S, Long. 359°E, N = 3, A 95 = 8.8, K = 196; Cerro Colorado-Caminiaga (CC) Lat. 79°S, Long. 291°E, N = 6, A 95 = 8.0, K = 71. Neither of the poles is coincident with expected Late Carboniferous-Early Permian directions according to accepted apparent polar-wander paths (APWPs) from South America and from other plates forming Pangaea in Late Palaeozoic times. This discrepancy could be the result of: (i) polar wander affecting the western Gondwana margin, probably related to SROP; (ii) tectonic rotations related to strike-slip faults active in the area since the Palaeozoic and controlling the position of the main depocentres; (iii) incorrect age assignment for the sedimentary sequences or for the remanence acquisition, i.e. local remagnetizations. Tectonic rotations and local remagnetization have both been proven in particular localities and further work needs to be done to establish the Late Palaeozoic APWP for South America, however, SROP seems to have played a major role controlling both processes, rotation and remagnetization.
Fil: Geuna, Silvana Evangelina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Instituto de Geofísica "Daniel Valencio"; Argentina
Fil: Escosteguy, Leonardo Darío. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Secretaría de Industria y Minería. Servicio Geológico Minero Argentino; Argentina
description A palaeomagnetic study of Upper Palaeozoic rocks was performed on Paganzo basin, central-western Argentina and its western extension, Río Blanco subbasin. The volcanic-volcaniclastic Rio del Peñón and marine sedimentary Punta del Agua formations were sampled in the Rincón Blanco syncline. Both units represent the Upper Carboniferous-Lower Permian transition according to palaeontological and geochronological evidence. The Chancani and Cerro Colorado-Caminiaga formations were sampled in their type localities, in the eastern Paganzo basin. All-reversed, pre-tectonic characteristic magnetizations were isolated in all three localities, spanning a wide lithological variation. Particularly in the Rincón Blanco syncline, the same reversed magnetization is observed in the entire 1500 m-thick sequence in volcanic and sedimentary rocks; at least part of the deformation there is thought to be Permian in age, related to the San Rafael orogenic phase (SROP). The palaeomagnetic poles are: Rincón Blanco (RB) Lat. 77°S, Long. 294°E, N = 19, A 95 = 4.9, K = 47; Chancaní (CH) Lat. 85°S, Long. 359°E, N = 3, A 95 = 8.8, K = 196; Cerro Colorado-Caminiaga (CC) Lat. 79°S, Long. 291°E, N = 6, A 95 = 8.0, K = 71. Neither of the poles is coincident with expected Late Carboniferous-Early Permian directions according to accepted apparent polar-wander paths (APWPs) from South America and from other plates forming Pangaea in Late Palaeozoic times. This discrepancy could be the result of: (i) polar wander affecting the western Gondwana margin, probably related to SROP; (ii) tectonic rotations related to strike-slip faults active in the area since the Palaeozoic and controlling the position of the main depocentres; (iii) incorrect age assignment for the sedimentary sequences or for the remanence acquisition, i.e. local remagnetizations. Tectonic rotations and local remagnetization have both been proven in particular localities and further work needs to be done to establish the Late Palaeozoic APWP for South America, however, SROP seems to have played a major role controlling both processes, rotation and remagnetization.
publishDate 2004
dc.date.none.fl_str_mv 2004-06
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/83499
Geuna, Silvana Evangelina; Escosteguy, Leonardo Darío; Palaeomagnetism of the Upper Carboniferous-Lower Permian transition from Paganzo basin, Argentina; Wiley Blackwell Publishing, Inc; Geophysical Journal International; 157; 3; 6-2004; 1071-1089
0956-540X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/83499
identifier_str_mv Geuna, Silvana Evangelina; Escosteguy, Leonardo Darío; Palaeomagnetism of the Upper Carboniferous-Lower Permian transition from Paganzo basin, Argentina; Wiley Blackwell Publishing, Inc; Geophysical Journal International; 157; 3; 6-2004; 1071-1089
0956-540X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-246X.2004.02229.x
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/gji/article/157/3/1071/568077
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
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dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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