Early Paleozoic accretionary orogenies in NW Argentina: Growth of West Gondwana

Autores
Weinberg, Roberto F.; Becchio, Raul Alberto; Farias, Pablo; Suzaño, Nestor Omar; Sola, Alfonso Manuel
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Two Early Paleozoic orogenic cycles in the Gondwana margin of NW Argentina were driven by subduction, and interrupted by collision of continental ribbons of Laurentian affinity. Subduction started at the passive margin of Gondwana, possibly in response to the end of amalgamation of the supercontinent. The passive margin was underlain by a hyper-extended continent-ocean transition, and low-angle subduction gave rise to a wide and hot fore-arc region during the Pampean orogenic cycle. The arrival of the first continent ribbon ended the Pampean cycle, steepened the subduction, further heating the fore-arc and restarting arc magmatism, after a magmatic lull, 250–300 km trenchwards, initiating the Famatinian orogenic cycle. This cycle started with a 30 Ma-long period of extension and marine sedimentation, followed by the arrival of the second continent ribbon and inversion the back-arc, initiating a ~20 Ma-long shortening event culminating with the shutting down of the arc. This event gave rise to a 300 km-wide, low-topography, hot orogeny. Thus, the many peculiarities of the two Paleozoic orogens of NW Argentina result from a subduction history that efficiently transferred heat to a 300–400 km-wide belt of turbidite-dominated sediments, that was first part of the Pampean fore-arc and then part of the Famatinian retroarc, developed at the extended continental margin of Gondwana. The two orogenies with continued high heat flux lasted ~110 Ma, giving rise to two calc-alkaline arcs separated by a 300 km belt of high-T – low-P migmatites and peraluminous granites formed by anatexis of sediments deposited on the passive margin as well as those deposited in the wide Pampean fore-arc. These turbidite-dominated sequences were metamorphosed and melted to form a continental crystalline basement and accreted to the cratonic margin, adding 500 km of crystalline rocks to the margin of Gondwana, at the same time that a similar process was happening in eastern Australia along the same continental margin. Interestingly this wide accretionary orogen has now become the region where the Andean system developed a wide orogeny above flat-slab subduction.
Fil: Weinberg, Roberto F.. Monash University; Australia
Fil: Becchio, Raul Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones en Energía no Convencional. Universidad Nacional de Salta. Facultad de Ciencias Exactas. Departamento de Física. Instituto de Investigaciones en Energía no Convencional; Argentina
Fil: Farias, Pablo. Monash University; Australia
Fil: Suzaño, Nestor Omar. Universidad Nacional de Jujuy. Instituto de Geología Minera; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones en Energía no Convencional. Universidad Nacional de Salta. Facultad de Ciencias Exactas. Departamento de Física. Instituto de Investigaciones en Energía no Convencional; Argentina
Fil: Sola, Alfonso Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Salta. Facultad de Cs.naturales. Cátedra de Petrología Geonorte; Argentina
Materia
ACCRETIONARY OROGENY
FAMATINIAN OROGEN
PAMPEAN OROGEN
PUNCOVISCANA SEQUENCE
TECTONICS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/93262
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Early Paleozoic accretionary orogenies in NW Argentina: Growth of West GondwanaWeinberg, Roberto F.Becchio, Raul AlbertoFarias, PabloSuzaño, Nestor OmarSola, Alfonso ManuelACCRETIONARY OROGENYFAMATINIAN OROGENPAMPEAN OROGENPUNCOVISCANA SEQUENCETECTONICShttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Two Early Paleozoic orogenic cycles in the Gondwana margin of NW Argentina were driven by subduction, and interrupted by collision of continental ribbons of Laurentian affinity. Subduction started at the passive margin of Gondwana, possibly in response to the end of amalgamation of the supercontinent. The passive margin was underlain by a hyper-extended continent-ocean transition, and low-angle subduction gave rise to a wide and hot fore-arc region during the Pampean orogenic cycle. The arrival of the first continent ribbon ended the Pampean cycle, steepened the subduction, further heating the fore-arc and restarting arc magmatism, after a magmatic lull, 250–300 km trenchwards, initiating the Famatinian orogenic cycle. This cycle started with a 30 Ma-long period of extension and marine sedimentation, followed by the arrival of the second continent ribbon and inversion the back-arc, initiating a ~20 Ma-long shortening event culminating with the shutting down of the arc. This event gave rise to a 300 km-wide, low-topography, hot orogeny. Thus, the many peculiarities of the two Paleozoic orogens of NW Argentina result from a subduction history that efficiently transferred heat to a 300–400 km-wide belt of turbidite-dominated sediments, that was first part of the Pampean fore-arc and then part of the Famatinian retroarc, developed at the extended continental margin of Gondwana. The two orogenies with continued high heat flux lasted ~110 Ma, giving rise to two calc-alkaline arcs separated by a 300 km belt of high-T – low-P migmatites and peraluminous granites formed by anatexis of sediments deposited on the passive margin as well as those deposited in the wide Pampean fore-arc. These turbidite-dominated sequences were metamorphosed and melted to form a continental crystalline basement and accreted to the cratonic margin, adding 500 km of crystalline rocks to the margin of Gondwana, at the same time that a similar process was happening in eastern Australia along the same continental margin. Interestingly this wide accretionary orogen has now become the region where the Andean system developed a wide orogeny above flat-slab subduction.Fil: Weinberg, Roberto F.. Monash University; AustraliaFil: Becchio, Raul Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones en Energía no Convencional. Universidad Nacional de Salta. Facultad de Ciencias Exactas. Departamento de Física. Instituto de Investigaciones en Energía no Convencional; ArgentinaFil: Farias, Pablo. Monash University; AustraliaFil: Suzaño, Nestor Omar. Universidad Nacional de Jujuy. Instituto de Geología Minera; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones en Energía no Convencional. Universidad Nacional de Salta. Facultad de Ciencias Exactas. Departamento de Física. Instituto de Investigaciones en Energía no Convencional; ArgentinaFil: Sola, Alfonso Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Salta. Facultad de Cs.naturales. Cátedra de Petrología Geonorte; ArgentinaElsevier Science2018-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/93262Weinberg, Roberto F.; Becchio, Raul Alberto; Farias, Pablo; Suzaño, Nestor Omar; Sola, Alfonso Manuel; Early Paleozoic accretionary orogenies in NW Argentina: Growth of West Gondwana; Elsevier Science; Earth-science Reviews; 187; 12-2018; 219-2470012-8252CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.earscirev.2018.10.001info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S001282521830309Xinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:48:46Zoai:ri.conicet.gov.ar:11336/93262instacron: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 09:48:47.065CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Early Paleozoic accretionary orogenies in NW Argentina: Growth of West Gondwana
title Early Paleozoic accretionary orogenies in NW Argentina: Growth of West Gondwana
spellingShingle Early Paleozoic accretionary orogenies in NW Argentina: Growth of West Gondwana
Weinberg, Roberto F.
ACCRETIONARY OROGENY
FAMATINIAN OROGEN
PAMPEAN OROGEN
PUNCOVISCANA SEQUENCE
TECTONICS
title_short Early Paleozoic accretionary orogenies in NW Argentina: Growth of West Gondwana
title_full Early Paleozoic accretionary orogenies in NW Argentina: Growth of West Gondwana
title_fullStr Early Paleozoic accretionary orogenies in NW Argentina: Growth of West Gondwana
title_full_unstemmed Early Paleozoic accretionary orogenies in NW Argentina: Growth of West Gondwana
title_sort Early Paleozoic accretionary orogenies in NW Argentina: Growth of West Gondwana
dc.creator.none.fl_str_mv Weinberg, Roberto F.
Becchio, Raul Alberto
Farias, Pablo
Suzaño, Nestor Omar
Sola, Alfonso Manuel
author Weinberg, Roberto F.
author_facet Weinberg, Roberto F.
Becchio, Raul Alberto
Farias, Pablo
Suzaño, Nestor Omar
Sola, Alfonso Manuel
author_role author
author2 Becchio, Raul Alberto
Farias, Pablo
Suzaño, Nestor Omar
Sola, Alfonso Manuel
author2_role author
author
author
author
dc.subject.none.fl_str_mv ACCRETIONARY OROGENY
FAMATINIAN OROGEN
PAMPEAN OROGEN
PUNCOVISCANA SEQUENCE
TECTONICS
topic ACCRETIONARY OROGENY
FAMATINIAN OROGEN
PAMPEAN OROGEN
PUNCOVISCANA SEQUENCE
TECTONICS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Two Early Paleozoic orogenic cycles in the Gondwana margin of NW Argentina were driven by subduction, and interrupted by collision of continental ribbons of Laurentian affinity. Subduction started at the passive margin of Gondwana, possibly in response to the end of amalgamation of the supercontinent. The passive margin was underlain by a hyper-extended continent-ocean transition, and low-angle subduction gave rise to a wide and hot fore-arc region during the Pampean orogenic cycle. The arrival of the first continent ribbon ended the Pampean cycle, steepened the subduction, further heating the fore-arc and restarting arc magmatism, after a magmatic lull, 250–300 km trenchwards, initiating the Famatinian orogenic cycle. This cycle started with a 30 Ma-long period of extension and marine sedimentation, followed by the arrival of the second continent ribbon and inversion the back-arc, initiating a ~20 Ma-long shortening event culminating with the shutting down of the arc. This event gave rise to a 300 km-wide, low-topography, hot orogeny. Thus, the many peculiarities of the two Paleozoic orogens of NW Argentina result from a subduction history that efficiently transferred heat to a 300–400 km-wide belt of turbidite-dominated sediments, that was first part of the Pampean fore-arc and then part of the Famatinian retroarc, developed at the extended continental margin of Gondwana. The two orogenies with continued high heat flux lasted ~110 Ma, giving rise to two calc-alkaline arcs separated by a 300 km belt of high-T – low-P migmatites and peraluminous granites formed by anatexis of sediments deposited on the passive margin as well as those deposited in the wide Pampean fore-arc. These turbidite-dominated sequences were metamorphosed and melted to form a continental crystalline basement and accreted to the cratonic margin, adding 500 km of crystalline rocks to the margin of Gondwana, at the same time that a similar process was happening in eastern Australia along the same continental margin. Interestingly this wide accretionary orogen has now become the region where the Andean system developed a wide orogeny above flat-slab subduction.
Fil: Weinberg, Roberto F.. Monash University; Australia
Fil: Becchio, Raul Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones en Energía no Convencional. Universidad Nacional de Salta. Facultad de Ciencias Exactas. Departamento de Física. Instituto de Investigaciones en Energía no Convencional; Argentina
Fil: Farias, Pablo. Monash University; Australia
Fil: Suzaño, Nestor Omar. Universidad Nacional de Jujuy. Instituto de Geología Minera; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones en Energía no Convencional. Universidad Nacional de Salta. Facultad de Ciencias Exactas. Departamento de Física. Instituto de Investigaciones en Energía no Convencional; Argentina
Fil: Sola, Alfonso Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Salta. Facultad de Cs.naturales. Cátedra de Petrología Geonorte; Argentina
description Two Early Paleozoic orogenic cycles in the Gondwana margin of NW Argentina were driven by subduction, and interrupted by collision of continental ribbons of Laurentian affinity. Subduction started at the passive margin of Gondwana, possibly in response to the end of amalgamation of the supercontinent. The passive margin was underlain by a hyper-extended continent-ocean transition, and low-angle subduction gave rise to a wide and hot fore-arc region during the Pampean orogenic cycle. The arrival of the first continent ribbon ended the Pampean cycle, steepened the subduction, further heating the fore-arc and restarting arc magmatism, after a magmatic lull, 250–300 km trenchwards, initiating the Famatinian orogenic cycle. This cycle started with a 30 Ma-long period of extension and marine sedimentation, followed by the arrival of the second continent ribbon and inversion the back-arc, initiating a ~20 Ma-long shortening event culminating with the shutting down of the arc. This event gave rise to a 300 km-wide, low-topography, hot orogeny. Thus, the many peculiarities of the two Paleozoic orogens of NW Argentina result from a subduction history that efficiently transferred heat to a 300–400 km-wide belt of turbidite-dominated sediments, that was first part of the Pampean fore-arc and then part of the Famatinian retroarc, developed at the extended continental margin of Gondwana. The two orogenies with continued high heat flux lasted ~110 Ma, giving rise to two calc-alkaline arcs separated by a 300 km belt of high-T – low-P migmatites and peraluminous granites formed by anatexis of sediments deposited on the passive margin as well as those deposited in the wide Pampean fore-arc. These turbidite-dominated sequences were metamorphosed and melted to form a continental crystalline basement and accreted to the cratonic margin, adding 500 km of crystalline rocks to the margin of Gondwana, at the same time that a similar process was happening in eastern Australia along the same continental margin. Interestingly this wide accretionary orogen has now become the region where the Andean system developed a wide orogeny above flat-slab subduction.
publishDate 2018
dc.date.none.fl_str_mv 2018-12
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/11336/93262
Weinberg, Roberto F.; Becchio, Raul Alberto; Farias, Pablo; Suzaño, Nestor Omar; Sola, Alfonso Manuel; Early Paleozoic accretionary orogenies in NW Argentina: Growth of West Gondwana; Elsevier Science; Earth-science Reviews; 187; 12-2018; 219-247
0012-8252
CONICET Digital
CONICET
url http://hdl.handle.net/11336/93262
identifier_str_mv Weinberg, Roberto F.; Becchio, Raul Alberto; Farias, Pablo; Suzaño, Nestor Omar; Sola, Alfonso Manuel; Early Paleozoic accretionary orogenies in NW Argentina: Growth of West Gondwana; Elsevier Science; Earth-science Reviews; 187; 12-2018; 219-247
0012-8252
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.earscirev.2018.10.001
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S001282521830309X
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
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dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
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reponame_str CONICET Digital (CONICET)
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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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