High T/P evolution and metamorphic ages of the migmatitic basement of northern Sierras Pampeanas, Argentina: Characterization of a mid-crustal segment of the Famatinian belt

New petrologic, thermobarometric and U-Pb monazite geochronologic information allowed to resolve the metamorphic evolution of a high temperature mid-crustal segment of an ancient subduction-related orogen. The El Portezuelo Metamorphic-Igneous Complex, in the northern Sierras Pampeanas, is mainly co...

Full description

Bibliographic Details
Authors: Larrovere, Mariano Alexis, de Los Hoyos, Camilo Raul, Toselli, Alejandro Jose, Rossi, Juana Norma, Stipp Basei, Miguel Angelo, Belmar, Mauricio E.
Format: article
Status:Published version
Publication Date:2011
Country:Argentina
Institution:Consejo Nacional de Investigaciones Científicas y Técnicas
Repository:CONICET Digital (CONICET)
Language:English
OAI Identifier:oai:ri.conicet.gov.ar:11336/148327
Online Access:http://hdl.handle.net/11336/148327
Access Level:Open access
Keyword:FAMATINIAN OROGENIC BELT
GEOCHRONOLOGY
GEOTHERMOBAROMETRY
METAMORPHISM
MIGMATITE
SIERRAS PAMPEANAS
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
id AR_c824dc2b30801ff96b84e98cf5a2d1b0
oai_identifier_str oai:ri.conicet.gov.ar:11336/148327
network_acronym_str AR
network_name_str Argentina
repository_id_str
dc.title.none.fl_str_mv High T/P evolution and metamorphic ages of the migmatitic basement of northern Sierras Pampeanas, Argentina: Characterization of a mid-crustal segment of the Famatinian belt
title High T/P evolution and metamorphic ages of the migmatitic basement of northern Sierras Pampeanas, Argentina: Characterization of a mid-crustal segment of the Famatinian belt
spellingShingle High T/P evolution and metamorphic ages of the migmatitic basement of northern Sierras Pampeanas, Argentina: Characterization of a mid-crustal segment of the Famatinian belt
Larrovere, Mariano Alexis
FAMATINIAN OROGENIC BELT
GEOCHRONOLOGY
GEOTHERMOBAROMETRY
METAMORPHISM
MIGMATITE
SIERRAS PAMPEANAS
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
title_short High T/P evolution and metamorphic ages of the migmatitic basement of northern Sierras Pampeanas, Argentina: Characterization of a mid-crustal segment of the Famatinian belt
title_full High T/P evolution and metamorphic ages of the migmatitic basement of northern Sierras Pampeanas, Argentina: Characterization of a mid-crustal segment of the Famatinian belt
title_fullStr High T/P evolution and metamorphic ages of the migmatitic basement of northern Sierras Pampeanas, Argentina: Characterization of a mid-crustal segment of the Famatinian belt
title_full_unstemmed High T/P evolution and metamorphic ages of the migmatitic basement of northern Sierras Pampeanas, Argentina: Characterization of a mid-crustal segment of the Famatinian belt
title_sort High T/P evolution and metamorphic ages of the migmatitic basement of northern Sierras Pampeanas, Argentina: Characterization of a mid-crustal segment of the Famatinian belt
dc.creator.none.fl_str_mv Larrovere, Mariano Alexis
de Los Hoyos, Camilo Raul
Toselli, Alejandro Jose
Rossi, Juana Norma
Stipp Basei, Miguel Angelo
Belmar, Mauricio E.
author Larrovere, Mariano Alexis
author_facet Larrovere, Mariano Alexis
de Los Hoyos, Camilo Raul
Toselli, Alejandro Jose
Rossi, Juana Norma
Stipp Basei, Miguel Angelo
Belmar, Mauricio E.
author_role author
author2 de Los Hoyos, Camilo Raul
Toselli, Alejandro Jose
Rossi, Juana Norma
Stipp Basei, Miguel Angelo
Belmar, Mauricio E.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv FAMATINIAN OROGENIC BELT
GEOCHRONOLOGY
GEOTHERMOBAROMETRY
METAMORPHISM
MIGMATITE
SIERRAS PAMPEANAS
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
topic FAMATINIAN OROGENIC BELT
GEOCHRONOLOGY
GEOTHERMOBAROMETRY
METAMORPHISM
MIGMATITE
SIERRAS PAMPEANAS
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
description New petrologic, thermobarometric and U-Pb monazite geochronologic information allowed to resolve the metamorphic evolution of a high temperature mid-crustal segment of an ancient subduction-related orogen. The El Portezuelo Metamorphic-Igneous Complex, in the northern Sierras Pampeanas, is mainly composed of migmatites that evolved from amphibolite to granulite metamorphic facies, reaching thermal peak conditions of 670-820 °C and 4.5-5.3 kbar. The petrographic study combined with conventional and pseudosection thermobarometry led to deducing a short prograde metamorphic evolution within migmatite blocks. The garnet-absent migmatites represent amphibolite-facies rocks, whereas the cordierite-garnet-K-feldspar-sillimanite migmatites represent higher metamorphic grade rocks. U-Pb geochronology on monazite grains within leucosome record the time of migmatization between ≈477 and 470 Ma. Thus, the El Portezuelo Metamorphic-Igneous Complex is an example of exhumed Early Ordovician anatectic middle crust of the Famatinian mobile belt. Homogeneous exposure of similar paleo-depths throughout the Famatinian back-arc and isobaric cooling paths suggest slow exhumation and consequent longstanding crustal residence at high temperatures. High thermal gradients uniformly distributed in the Famatinian back-arc can be explained by shallow convection of a low-viscosity asthenosphere promoted by subducting-slab dehydration.
publishDate 2011
dc.date.none.fl_str_mv 2011-03
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/11336/148327
Larrovere, Mariano Alexis; de Los Hoyos, Camilo Raul; Toselli, Alejandro Jose; Rossi, Juana Norma; Stipp Basei, Miguel Angelo; et al.; High T/P evolution and metamorphic ages of the migmatitic basement of northern Sierras Pampeanas, Argentina: Characterization of a mid-crustal segment of the Famatinian belt; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 31; 2-3; 3-2011; 279-297
0895-9811
1873-0647
CONICET Digital
CONICET
url http://hdl.handle.net/11336/148327
identifier_str_mv Larrovere, Mariano Alexis; de Los Hoyos, Camilo Raul; Toselli, Alejandro Jose; Rossi, Juana Norma; Stipp Basei, Miguel Angelo; et al.; High T/P evolution and metamorphic ages of the migmatitic basement of northern Sierras Pampeanas, Argentina: Characterization of a mid-crustal segment of the Famatinian belt; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 31; 2-3; 3-2011; 279-297
0895-9811
1873-0647
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.jsames.2010.11.006
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0895981111000071
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/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
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
_version_ 1799195427117989888
spelling High T/P evolution and metamorphic ages of the migmatitic basement of northern Sierras Pampeanas, Argentina: Characterization of a mid-crustal segment of the Famatinian beltLarrovere, Mariano Alexisde Los Hoyos, Camilo RaulToselli, Alejandro JoseRossi, Juana NormaStipp Basei, Miguel AngeloBelmar, Mauricio E.FAMATINIAN OROGENIC BELTGEOCHRONOLOGYGEOTHERMOBAROMETRYMETAMORPHISMMIGMATITESIERRAS PAMPEANAShttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1New petrologic, thermobarometric and U-Pb monazite geochronologic information allowed to resolve the metamorphic evolution of a high temperature mid-crustal segment of an ancient subduction-related orogen. The El Portezuelo Metamorphic-Igneous Complex, in the northern Sierras Pampeanas, is mainly composed of migmatites that evolved from amphibolite to granulite metamorphic facies, reaching thermal peak conditions of 670-820 °C and 4.5-5.3 kbar. The petrographic study combined with conventional and pseudosection thermobarometry led to deducing a short prograde metamorphic evolution within migmatite blocks. The garnet-absent migmatites represent amphibolite-facies rocks, whereas the cordierite-garnet-K-feldspar-sillimanite migmatites represent higher metamorphic grade rocks. U-Pb geochronology on monazite grains within leucosome record the time of migmatization between ≈477 and 470 Ma. Thus, the El Portezuelo Metamorphic-Igneous Complex is an example of exhumed Early Ordovician anatectic middle crust of the Famatinian mobile belt. Homogeneous exposure of similar paleo-depths throughout the Famatinian back-arc and isobaric cooling paths suggest slow exhumation and consequent longstanding crustal residence at high temperatures. High thermal gradients uniformly distributed in the Famatinian back-arc can be explained by shallow convection of a low-viscosity asthenosphere promoted by subducting-slab dehydration.Fil: Larrovere, Mariano Alexis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Universidad Nacional de La Rioja. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Universidad Nacional de Catamarca. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Secretaría de Industria y Minería. Servicio Geológico Minero Argentino. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Provincia de La Rioja. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja; ArgentinaFil: de Los Hoyos, Camilo Raul. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; ArgentinaFil: Toselli, Alejandro Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; ArgentinaFil: Rossi, Juana Norma. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; ArgentinaFil: Stipp Basei, Miguel Angelo. Universidade de Sao Paulo; BrasilFil: Belmar, Mauricio E.. Universidad de Chile. Facultad de Ciencias Físicas y Matemáticas. Departamento de Geología; ChilePergamon-Elsevier Science Ltd2011-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/148327Larrovere, Mariano Alexis; de Los Hoyos, Camilo Raul; Toselli, Alejandro Jose; Rossi, Juana Norma; Stipp Basei, Miguel Angelo; et al.; High T/P evolution and metamorphic ages of the migmatitic basement of northern Sierras Pampeanas, Argentina: Characterization of a mid-crustal segment of the Famatinian belt; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 31; 2-3; 3-2011; 279-2970895-98111873-0647CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2010.11.006info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0895981111000071info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:52:11Zoai:ri.conicet.gov.ar:11336/148327instacron: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:34982024-05-08 13:52:11.606CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
score 15,811543

Similar Items