Resolving Crustal and Subcrustal Dynamic Sources in Continental Arc Magmas: The Cenozoic Andean Arc of Central Chile
- Autores
- Muñoz Gómez, M.; Fanning, C. M.; Tapia, Felipe; Payacán, I.; Fuentes, F.; Farías, M.; Charrier, R.; Polvé, M.; Quiñones, S.; Deckart, K.; Fock, A.
- Año de publicación
- 2025
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The Andean margin of Central Chile (∼32°40′–34°30′S) records abundant Cenozoic arcmagmatic activity with variable compositional characteristics. This is examined through the analysis of anextensive database of new and published whole‐rock geochemistry and Sr‐Nd isotopic compositions, in additionto zircon Hf and O isotopic compositions. The whole‐rock data record an increasing assimilation of continentalcrust material that developed through the compressional regime set in the margin in the Early Miocene that ledto the construction of the modern Andes. The same is recorded by the Hf and O isotopic compositions, but thesealso allow identification of components involved in the magma genesis: (a) the sub arc mantle derived primarymagmas, (b) a late Paleozoic—Early Triassic crystalline component, as that currently outcropping immediatelyto the east of the study area, (c) a deep enriched component, which likely corresponds to the Cuyania terrane, aGrenville age basement recognized further east in this Andean region, and (d) a deep juvenile low‐δ18Ocomponent, interpreted here as basement with oceanic crust affinities. This latter component reveals a possiblecomposite nature for the Chilenia terrane, the postulated Grenville age basement in the region. The CenozoicAndean arc magmas correspond to the differentiated products of an extensive intra‐crustal re‐working, takingplace along tens of kilometers below their emplacement level, and whose main imprint is on the magmaticisotopic composition. Our results document the role of the continental crust, particularly regarding its evolvingarchitecture and constitution, over the composition of arc magmas.
Fil: Muñoz Gómez, M.. Universidad Andrés Bello; Chile
Fil: Fanning, C. M.. Australian National University; Australia
Fil: Tapia, Felipe. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Payacán, I.. Universidad San Sebastían; Chile
Fil: Fuentes, F.. Universidad del Desarrollo; Chile
Fil: Farías, M.. Universidad de Chile. Facultad de Ciencias Físicas y Matemáticas. Departamento de Geología; Chile
Fil: Charrier, R.. Universidad Andrés Bello; Chile
Fil: Polvé, M.. Université Toulouse Iii Paul Sabatier; Francia
Fil: Quiñones, S.. Universidad Andrés Bello; Chile
Fil: Deckart, K.. Universidad de Chile. Facultad de Ciencias Físicas y Matemáticas. Departamento de Geología; Chile
Fil: Fock, A.. SQM Australia; Australia - Materia
-
WESTERN ANDES
ABANICO FORMATION
CENOZOIC MAGMATIC ARC
ANDEAN MAGMATISM - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
.jpg)
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/272461
Ver los metadatos del registro completo
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Resolving Crustal and Subcrustal Dynamic Sources in Continental Arc Magmas: The Cenozoic Andean Arc of Central ChileMuñoz Gómez, M.Fanning, C. M.Tapia, FelipePayacán, I.Fuentes, F.Farías, M.Charrier, R.Polvé, M.Quiñones, S.Deckart, K.Fock, A.WESTERN ANDESABANICO FORMATIONCENOZOIC MAGMATIC ARCANDEAN MAGMATISMhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The Andean margin of Central Chile (∼32°40′–34°30′S) records abundant Cenozoic arcmagmatic activity with variable compositional characteristics. This is examined through the analysis of anextensive database of new and published whole‐rock geochemistry and Sr‐Nd isotopic compositions, in additionto zircon Hf and O isotopic compositions. The whole‐rock data record an increasing assimilation of continentalcrust material that developed through the compressional regime set in the margin in the Early Miocene that ledto the construction of the modern Andes. The same is recorded by the Hf and O isotopic compositions, but thesealso allow identification of components involved in the magma genesis: (a) the sub arc mantle derived primarymagmas, (b) a late Paleozoic—Early Triassic crystalline component, as that currently outcropping immediatelyto the east of the study area, (c) a deep enriched component, which likely corresponds to the Cuyania terrane, aGrenville age basement recognized further east in this Andean region, and (d) a deep juvenile low‐δ18Ocomponent, interpreted here as basement with oceanic crust affinities. This latter component reveals a possiblecomposite nature for the Chilenia terrane, the postulated Grenville age basement in the region. The CenozoicAndean arc magmas correspond to the differentiated products of an extensive intra‐crustal re‐working, takingplace along tens of kilometers below their emplacement level, and whose main imprint is on the magmaticisotopic composition. Our results document the role of the continental crust, particularly regarding its evolvingarchitecture and constitution, over the composition of arc magmas.Fil: Muñoz Gómez, M.. Universidad Andrés Bello; ChileFil: Fanning, C. M.. Australian National University; AustraliaFil: Tapia, Felipe. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; ArgentinaFil: Payacán, I.. Universidad San Sebastían; ChileFil: Fuentes, F.. Universidad del Desarrollo; ChileFil: Farías, M.. Universidad de Chile. Facultad de Ciencias Físicas y Matemáticas. Departamento de Geología; ChileFil: Charrier, R.. Universidad Andrés Bello; ChileFil: Polvé, M.. Université Toulouse Iii Paul Sabatier; FranciaFil: Quiñones, S.. Universidad Andrés Bello; ChileFil: Deckart, K.. Universidad de Chile. Facultad de Ciencias Físicas y Matemáticas. Departamento de Geología; ChileFil: Fock, A.. SQM Australia; AustraliaAmerican Geophysical Union2025-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/272461Muñoz Gómez, M.; Fanning, C. M.; Tapia, Felipe; Payacán, I.; Fuentes, F.; et al.; Resolving Crustal and Subcrustal Dynamic Sources in Continental Arc Magmas: The Cenozoic Andean Arc of Central Chile; American Geophysical Union; Geochemistry Geophysics Geosystems; 26; 9; 9-2025; 1-311525-2027CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GC012154info:eu-repo/semantics/altIdentifier/doi/10.1029/2024GC012154info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:25:07Zoai:ri.conicet.gov.ar:11336/272461instacron: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:34982025-10-15 15:25:07.75CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
| dc.title.none.fl_str_mv |
Resolving Crustal and Subcrustal Dynamic Sources in Continental Arc Magmas: The Cenozoic Andean Arc of Central Chile |
| title |
Resolving Crustal and Subcrustal Dynamic Sources in Continental Arc Magmas: The Cenozoic Andean Arc of Central Chile |
| spellingShingle |
Resolving Crustal and Subcrustal Dynamic Sources in Continental Arc Magmas: The Cenozoic Andean Arc of Central Chile Muñoz Gómez, M. WESTERN ANDES ABANICO FORMATION CENOZOIC MAGMATIC ARC ANDEAN MAGMATISM |
| title_short |
Resolving Crustal and Subcrustal Dynamic Sources in Continental Arc Magmas: The Cenozoic Andean Arc of Central Chile |
| title_full |
Resolving Crustal and Subcrustal Dynamic Sources in Continental Arc Magmas: The Cenozoic Andean Arc of Central Chile |
| title_fullStr |
Resolving Crustal and Subcrustal Dynamic Sources in Continental Arc Magmas: The Cenozoic Andean Arc of Central Chile |
| title_full_unstemmed |
Resolving Crustal and Subcrustal Dynamic Sources in Continental Arc Magmas: The Cenozoic Andean Arc of Central Chile |
| title_sort |
Resolving Crustal and Subcrustal Dynamic Sources in Continental Arc Magmas: The Cenozoic Andean Arc of Central Chile |
| dc.creator.none.fl_str_mv |
Muñoz Gómez, M. Fanning, C. M. Tapia, Felipe Payacán, I. Fuentes, F. Farías, M. Charrier, R. Polvé, M. Quiñones, S. Deckart, K. Fock, A. |
| author |
Muñoz Gómez, M. |
| author_facet |
Muñoz Gómez, M. Fanning, C. M. Tapia, Felipe Payacán, I. Fuentes, F. Farías, M. Charrier, R. Polvé, M. Quiñones, S. Deckart, K. Fock, A. |
| author_role |
author |
| author2 |
Fanning, C. M. Tapia, Felipe Payacán, I. Fuentes, F. Farías, M. Charrier, R. Polvé, M. Quiñones, S. Deckart, K. Fock, A. |
| author2_role |
author author author author author author author author author author |
| dc.subject.none.fl_str_mv |
WESTERN ANDES ABANICO FORMATION CENOZOIC MAGMATIC ARC ANDEAN MAGMATISM |
| topic |
WESTERN ANDES ABANICO FORMATION CENOZOIC MAGMATIC ARC ANDEAN MAGMATISM |
| purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
| dc.description.none.fl_txt_mv |
The Andean margin of Central Chile (∼32°40′–34°30′S) records abundant Cenozoic arcmagmatic activity with variable compositional characteristics. This is examined through the analysis of anextensive database of new and published whole‐rock geochemistry and Sr‐Nd isotopic compositions, in additionto zircon Hf and O isotopic compositions. The whole‐rock data record an increasing assimilation of continentalcrust material that developed through the compressional regime set in the margin in the Early Miocene that ledto the construction of the modern Andes. The same is recorded by the Hf and O isotopic compositions, but thesealso allow identification of components involved in the magma genesis: (a) the sub arc mantle derived primarymagmas, (b) a late Paleozoic—Early Triassic crystalline component, as that currently outcropping immediatelyto the east of the study area, (c) a deep enriched component, which likely corresponds to the Cuyania terrane, aGrenville age basement recognized further east in this Andean region, and (d) a deep juvenile low‐δ18Ocomponent, interpreted here as basement with oceanic crust affinities. This latter component reveals a possiblecomposite nature for the Chilenia terrane, the postulated Grenville age basement in the region. The CenozoicAndean arc magmas correspond to the differentiated products of an extensive intra‐crustal re‐working, takingplace along tens of kilometers below their emplacement level, and whose main imprint is on the magmaticisotopic composition. Our results document the role of the continental crust, particularly regarding its evolvingarchitecture and constitution, over the composition of arc magmas. Fil: Muñoz Gómez, M.. Universidad Andrés Bello; Chile Fil: Fanning, C. M.. Australian National University; Australia Fil: Tapia, Felipe. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina Fil: Payacán, I.. Universidad San Sebastían; Chile Fil: Fuentes, F.. Universidad del Desarrollo; Chile Fil: Farías, M.. Universidad de Chile. Facultad de Ciencias Físicas y Matemáticas. Departamento de Geología; Chile Fil: Charrier, R.. Universidad Andrés Bello; Chile Fil: Polvé, M.. Université Toulouse Iii Paul Sabatier; Francia Fil: Quiñones, S.. Universidad Andrés Bello; Chile Fil: Deckart, K.. Universidad de Chile. Facultad de Ciencias Físicas y Matemáticas. Departamento de Geología; Chile Fil: Fock, A.. SQM Australia; Australia |
| description |
The Andean margin of Central Chile (∼32°40′–34°30′S) records abundant Cenozoic arcmagmatic activity with variable compositional characteristics. This is examined through the analysis of anextensive database of new and published whole‐rock geochemistry and Sr‐Nd isotopic compositions, in additionto zircon Hf and O isotopic compositions. The whole‐rock data record an increasing assimilation of continentalcrust material that developed through the compressional regime set in the margin in the Early Miocene that ledto the construction of the modern Andes. The same is recorded by the Hf and O isotopic compositions, but thesealso allow identification of components involved in the magma genesis: (a) the sub arc mantle derived primarymagmas, (b) a late Paleozoic—Early Triassic crystalline component, as that currently outcropping immediatelyto the east of the study area, (c) a deep enriched component, which likely corresponds to the Cuyania terrane, aGrenville age basement recognized further east in this Andean region, and (d) a deep juvenile low‐δ18Ocomponent, interpreted here as basement with oceanic crust affinities. This latter component reveals a possiblecomposite nature for the Chilenia terrane, the postulated Grenville age basement in the region. The CenozoicAndean arc magmas correspond to the differentiated products of an extensive intra‐crustal re‐working, takingplace along tens of kilometers below their emplacement level, and whose main imprint is on the magmaticisotopic composition. Our results document the role of the continental crust, particularly regarding its evolvingarchitecture and constitution, over the composition of arc magmas. |
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2025 |
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2025-09 |
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http://hdl.handle.net/11336/272461 Muñoz Gómez, M.; Fanning, C. M.; Tapia, Felipe; Payacán, I.; Fuentes, F.; et al.; Resolving Crustal and Subcrustal Dynamic Sources in Continental Arc Magmas: The Cenozoic Andean Arc of Central Chile; American Geophysical Union; Geochemistry Geophysics Geosystems; 26; 9; 9-2025; 1-31 1525-2027 CONICET Digital CONICET |
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http://hdl.handle.net/11336/272461 |
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Muñoz Gómez, M.; Fanning, C. M.; Tapia, Felipe; Payacán, I.; Fuentes, F.; et al.; Resolving Crustal and Subcrustal Dynamic Sources in Continental Arc Magmas: The Cenozoic Andean Arc of Central Chile; American Geophysical Union; Geochemistry Geophysics Geosystems; 26; 9; 9-2025; 1-31 1525-2027 CONICET Digital CONICET |
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eng |
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