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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/81111
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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 Técnicas2025-09-29T10:36:55Zoai: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:34982025-09-29 10:36:56.135CONICET 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) 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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1844614389717532672 |
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13.070432 |