Magmatic evolution of the Peñón Rosado granite: Petrogenesis of garnet-bearing granitoids

Autores
Dahlquist, Juan Andrés; Galindo, C.; Pankhurst, R. J.; Rapela, Carlos Washington; Alasino, Pablo Horacio; Saavedra, J.; Fanning, C. M.
Año de publicación
2007
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Garnet is an uncommon accessory mineral in igneous rocks but is petrologically significant. The Peñón Rosado granite (469 ± 4 Ma) at Cerro Asperecito is an S-type granite that contains an unusual amount of magmatic garnet. Combined petrology, chemistry/mineralogy and whole-rock geochemistry indicates that the magma was produced by partial melting of the surrounding metasedimentary rocks and subsequent differentiation by fractional crystallization during emplacement, with garnet occurring throughout the crystallization sequence. Three facies are recognised: PRG1 (SiO 2 = 65.70%) represents cumulates, PRG2 (SiO 2 = 70.88%) represents a differentiated melt, and PRG3 (SiO 2 = 74.59%) a residual melt. The fractionation of Mn in garnet and the proportion of garnet crystallizing are roughly controlled by the evolving composition of the different granitic facies. Geothermobaric calculations reveal an initial crystallization temperature of 764°-792 °C and a pressure of 5.9-6.0 kb, indicating that the parental magma was emplaced at middle crustal depths (∼ 19-20 km) in moderate-low magmatic temperature conditions. Major (CaO, Na 2 O, K 2 O) and trace element (Rb, Sr, Ba) contents in the Peñón Rosado granite strongly suggest anatexis was the outcome of H 2 O-fluxed melting of metagreywacke, with heat input from a major metaluminous suite. Our studies reveal that garnet formed by direct crystallization from peraluminous magma in equilibrium with solid phases such as biotite and white mica. We confirm previous suggestions that zoning in garnet is strongly temperature-dependent. Thus, magmatic garnets in granitic rocks crystallized above ∼ 700 °C have "spessartine inverse bell-shaped profile" or are unzoned, whereas garnet exhibiting "spessartine bell-shaped profile" must be considered of metamorphic origin (i.e., xenocrystic) or formed in very felsic magmas (SiO 2 = 73-76%) crystallizing below ∼ 700 °C.
Fil: Dahlquist, Juan Andrés. 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; Argentina
Fil: Galindo, C.. Universidad Complutense de Madrid; España
Fil: Pankhurst, R. J.. British Geological Survey; Reino Unido
Fil: Rapela, Carlos Washington. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Alasino, Pablo Horacio. 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; Argentina
Fil: Saavedra, J.. Consejo Superior de Investigaciones Científicas; España
Fil: Fanning, C. M.. the Australian National University; Australia
Materia
Fractional Crystallization
Garnet Zoning
Partial Melting
S-Type Granite
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:11336/81111
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/81111
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Magmatic evolution of the Peñón Rosado granite: Petrogenesis of garnet-bearing granitoidsDahlquist, Juan AndrésGalindo, C.Pankhurst, R. J.Rapela, Carlos WashingtonAlasino, Pablo HoracioSaavedra, J.Fanning, C. M.Fractional CrystallizationGarnet ZoningPartial MeltingS-Type Granitehttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Garnet is an uncommon accessory mineral in igneous rocks but is petrologically significant. The Peñón Rosado granite (469 ± 4 Ma) at Cerro Asperecito is an S-type granite that contains an unusual amount of magmatic garnet. Combined petrology, chemistry/mineralogy and whole-rock geochemistry indicates that the magma was produced by partial melting of the surrounding metasedimentary rocks and subsequent differentiation by fractional crystallization during emplacement, with garnet occurring throughout the crystallization sequence. Three facies are recognised: PRG1 (SiO 2 = 65.70%) represents cumulates, PRG2 (SiO 2 = 70.88%) represents a differentiated melt, and PRG3 (SiO 2 = 74.59%) a residual melt. The fractionation of Mn in garnet and the proportion of garnet crystallizing are roughly controlled by the evolving composition of the different granitic facies. Geothermobaric calculations reveal an initial crystallization temperature of 764°-792 °C and a pressure of 5.9-6.0 kb, indicating that the parental magma was emplaced at middle crustal depths (∼ 19-20 km) in moderate-low magmatic temperature conditions. Major (CaO, Na 2 O, K 2 O) and trace element (Rb, Sr, Ba) contents in the Peñón Rosado granite strongly suggest anatexis was the outcome of H 2 O-fluxed melting of metagreywacke, with heat input from a major metaluminous suite. Our studies reveal that garnet formed by direct crystallization from peraluminous magma in equilibrium with solid phases such as biotite and white mica. We confirm previous suggestions that zoning in garnet is strongly temperature-dependent. Thus, magmatic garnets in granitic rocks crystallized above ∼ 700 °C have "spessartine inverse bell-shaped profile" or are unzoned, whereas garnet exhibiting "spessartine bell-shaped profile" must be considered of metamorphic origin (i.e., xenocrystic) or formed in very felsic magmas (SiO 2 = 73-76%) crystallizing below ∼ 700 °C.Fil: Dahlquist, Juan Andrés. 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: Galindo, C.. Universidad Complutense de Madrid; EspañaFil: Pankhurst, R. J.. British Geological Survey; Reino UnidoFil: Rapela, Carlos Washington. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaFil: Alasino, Pablo Horacio. 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: Saavedra, J.. Consejo Superior de Investigaciones Científicas; EspañaFil: Fanning, C. M.. the Australian National University; AustraliaElsevier Science2007-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/81111Dahlquist, Juan Andrés; Galindo, C.; Pankhurst, R. J.; Rapela, Carlos Washington; Alasino, Pablo Horacio; et al.; Magmatic evolution of the Peñón Rosado granite: Petrogenesis of garnet-bearing granitoids; Elsevier Science; Lithos; 95; 3-4; 5-2007; 177-2070024-4937CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S002449370600209Xinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.lithos.2006.07.010info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T12:09:08Zoai:ri.conicet.gov.ar:11336/81111instacron: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:34982025-10-22 12:09:09.056CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Magmatic evolution of the Peñón Rosado granite: Petrogenesis of garnet-bearing granitoids
title Magmatic evolution of the Peñón Rosado granite: Petrogenesis of garnet-bearing granitoids
spellingShingle Magmatic evolution of the Peñón Rosado granite: Petrogenesis of garnet-bearing granitoids
Dahlquist, Juan Andrés
Fractional Crystallization
Garnet Zoning
Partial Melting
S-Type Granite
title_short Magmatic evolution of the Peñón Rosado granite: Petrogenesis of garnet-bearing granitoids
title_full Magmatic evolution of the Peñón Rosado granite: Petrogenesis of garnet-bearing granitoids
title_fullStr Magmatic evolution of the Peñón Rosado granite: Petrogenesis of garnet-bearing granitoids
title_full_unstemmed Magmatic evolution of the Peñón Rosado granite: Petrogenesis of garnet-bearing granitoids
title_sort Magmatic evolution of the Peñón Rosado granite: Petrogenesis of garnet-bearing granitoids
dc.creator.none.fl_str_mv Dahlquist, Juan Andrés
Galindo, C.
Pankhurst, R. J.
Rapela, Carlos Washington
Alasino, Pablo Horacio
Saavedra, J.
Fanning, C. M.
author Dahlquist, Juan Andrés
author_facet Dahlquist, Juan Andrés
Galindo, C.
Pankhurst, R. J.
Rapela, Carlos Washington
Alasino, Pablo Horacio
Saavedra, J.
Fanning, C. M.
author_role author
author2 Galindo, C.
Pankhurst, R. J.
Rapela, Carlos Washington
Alasino, Pablo Horacio
Saavedra, J.
Fanning, C. M.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Fractional Crystallization
Garnet Zoning
Partial Melting
S-Type Granite
topic Fractional Crystallization
Garnet Zoning
Partial Melting
S-Type Granite
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Garnet is an uncommon accessory mineral in igneous rocks but is petrologically significant. The Peñón Rosado granite (469 ± 4 Ma) at Cerro Asperecito is an S-type granite that contains an unusual amount of magmatic garnet. Combined petrology, chemistry/mineralogy and whole-rock geochemistry indicates that the magma was produced by partial melting of the surrounding metasedimentary rocks and subsequent differentiation by fractional crystallization during emplacement, with garnet occurring throughout the crystallization sequence. Three facies are recognised: PRG1 (SiO 2 = 65.70%) represents cumulates, PRG2 (SiO 2 = 70.88%) represents a differentiated melt, and PRG3 (SiO 2 = 74.59%) a residual melt. The fractionation of Mn in garnet and the proportion of garnet crystallizing are roughly controlled by the evolving composition of the different granitic facies. Geothermobaric calculations reveal an initial crystallization temperature of 764°-792 °C and a pressure of 5.9-6.0 kb, indicating that the parental magma was emplaced at middle crustal depths (∼ 19-20 km) in moderate-low magmatic temperature conditions. Major (CaO, Na 2 O, K 2 O) and trace element (Rb, Sr, Ba) contents in the Peñón Rosado granite strongly suggest anatexis was the outcome of H 2 O-fluxed melting of metagreywacke, with heat input from a major metaluminous suite. Our studies reveal that garnet formed by direct crystallization from peraluminous magma in equilibrium with solid phases such as biotite and white mica. We confirm previous suggestions that zoning in garnet is strongly temperature-dependent. Thus, magmatic garnets in granitic rocks crystallized above ∼ 700 °C have "spessartine inverse bell-shaped profile" or are unzoned, whereas garnet exhibiting "spessartine bell-shaped profile" must be considered of metamorphic origin (i.e., xenocrystic) or formed in very felsic magmas (SiO 2 = 73-76%) crystallizing below ∼ 700 °C.
Fil: Dahlquist, Juan Andrés. 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; Argentina
Fil: Galindo, C.. Universidad Complutense de Madrid; España
Fil: Pankhurst, R. J.. British Geological Survey; Reino Unido
Fil: Rapela, Carlos Washington. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Alasino, Pablo Horacio. 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; Argentina
Fil: Saavedra, J.. Consejo Superior de Investigaciones Científicas; España
Fil: Fanning, C. M.. the Australian National University; Australia
description Garnet is an uncommon accessory mineral in igneous rocks but is petrologically significant. The Peñón Rosado granite (469 ± 4 Ma) at Cerro Asperecito is an S-type granite that contains an unusual amount of magmatic garnet. Combined petrology, chemistry/mineralogy and whole-rock geochemistry indicates that the magma was produced by partial melting of the surrounding metasedimentary rocks and subsequent differentiation by fractional crystallization during emplacement, with garnet occurring throughout the crystallization sequence. Three facies are recognised: PRG1 (SiO 2 = 65.70%) represents cumulates, PRG2 (SiO 2 = 70.88%) represents a differentiated melt, and PRG3 (SiO 2 = 74.59%) a residual melt. The fractionation of Mn in garnet and the proportion of garnet crystallizing are roughly controlled by the evolving composition of the different granitic facies. Geothermobaric calculations reveal an initial crystallization temperature of 764°-792 °C and a pressure of 5.9-6.0 kb, indicating that the parental magma was emplaced at middle crustal depths (∼ 19-20 km) in moderate-low magmatic temperature conditions. Major (CaO, Na 2 O, K 2 O) and trace element (Rb, Sr, Ba) contents in the Peñón Rosado granite strongly suggest anatexis was the outcome of H 2 O-fluxed melting of metagreywacke, with heat input from a major metaluminous suite. Our studies reveal that garnet formed by direct crystallization from peraluminous magma in equilibrium with solid phases such as biotite and white mica. We confirm previous suggestions that zoning in garnet is strongly temperature-dependent. Thus, magmatic garnets in granitic rocks crystallized above ∼ 700 °C have "spessartine inverse bell-shaped profile" or are unzoned, whereas garnet exhibiting "spessartine bell-shaped profile" must be considered of metamorphic origin (i.e., xenocrystic) or formed in very felsic magmas (SiO 2 = 73-76%) crystallizing below ∼ 700 °C.
publishDate 2007
dc.date.none.fl_str_mv 2007-05
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/11336/81111
Dahlquist, Juan Andrés; Galindo, C.; Pankhurst, R. J.; Rapela, Carlos Washington; Alasino, Pablo Horacio; et al.; Magmatic evolution of the Peñón Rosado granite: Petrogenesis of garnet-bearing granitoids; Elsevier Science; Lithos; 95; 3-4; 5-2007; 177-207
0024-4937
CONICET Digital
CONICET
url http://hdl.handle.net/11336/81111
identifier_str_mv Dahlquist, Juan Andrés; Galindo, C.; Pankhurst, R. J.; Rapela, Carlos Washington; Alasino, Pablo Horacio; et al.; Magmatic evolution of the Peñón Rosado granite: Petrogenesis of garnet-bearing granitoids; Elsevier Science; Lithos; 95; 3-4; 5-2007; 177-207
0024-4937
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S002449370600209X
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.lithos.2006.07.010
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
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
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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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score 12.982451

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