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dc.contributor.author
Cambeses, Aitor
dc.contributor.author
Molina, José F.
dc.contributor.author
Morales, Irene
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Lázaro, Concepción
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Moreno Moreno, Juan Antonio
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dc.contributor.author
Montero, Pilar
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Bea, Fernando
dc.date.available
2023-08-18T16:38:20Z
dc.date.issued
2021-04
dc.identifier.citation
Cambeses, Aitor; Molina, José F.; Morales, Irene; Lázaro, Concepción; Moreno Moreno, Juan Antonio; et al.; Compositional evolution of the variscan intra-orogenic extensional magmatism in the valencia del ventoso plutonic complex, ossa-morena zone (Sw iberia): A view from amphibole compositional relationships; Multidisciplinary Digital Publishing Institute; Minerals; 11; 4; 4-2021; 1-18
dc.identifier.uri
http://hdl.handle.net/11336/208756
dc.description.abstract
The Ossa-Morena Zone (OMZ), SW Iberia, has numerous Lower Carboniferous compositionally zoned plutons that formed in a Variscan intra-orogenic extensional setting. This magmatism shows a wide compositional variation comprising alkaline, transitional, and calc-alkaline suites. The calc-alkaline suite was produced by hybridization of alkaline magmas with felsic melts generated by crustal anatexis related to the intrusion of mafic magmas in the middle crust. In this work, we present a textural and mineralogical study of the Variscan Valencia del Ventoso main pluton from the OMZ to track the compositional evolution of magmas during hybridization using constraints from amphibole compositions and to determine the P-T conditions of emplacement using amphibole-based thermobarometry. This pluton exhibits reverse zoning with an inner facies containing alkaline dolerites, gabbros, and quartz diorites, an intermediate facies with transitional diorites, and an outer facies with calc-alkaline quartz diorites to monzogranites. Magmas from the intermediate and border facies crystallized under oxidizing conditions at relatively low temperatures (range: 640–760 °C) and ca. 280–300 MPa, implying near H2O-saturated conditions. These rock facies show mineralogical evidence of hybridization between alkaline to mildly alkalic and calc-alkaline magmas. The former is inferred from the occurrence of antecrysts of labradorite-andesine, high-Ti pargasite-hastingsite, and biotite with deficiency in tetrahedral-site occupancy, a distinctive feature of biotite from the inner facies alkaline dolerites. This contrasts with later crystallization from the calc-alkaline magma of andesine-oligoclase, low-Ti magnesiohornblende-edenite, and biotite with full tetrahedral-site occupancy. Constraints from amphibole-melt compositional relationships in antecrystic high-Ti amphibole suggest that the alkaline magmatic component could have a high-to ultra-K affinity.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Multidisciplinary Digital Publishing Institute
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/
dc.subject
AMPHIBOLE COMPOSITIONAL RELATIONSHIPS
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AMPHIBOLE-PLAGIOCLASE THERMOBAROMETRY
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IBERIA
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MAGMA MIXING AND HYBRIDIZATION
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OSSA-MORENA ZONE
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POST-COLLISIONAL MAGMATISM
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VARISCAN OROGEN
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Geoquímica y Geofísica
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Compositional evolution of the variscan intra-orogenic extensional magmatism in the valencia del ventoso plutonic complex, ossa-morena zone (Sw iberia): A view from amphibole compositional relationships
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-08-16T11:11:14Z
dc.identifier.eissn
2075-163X
dc.journal.volume
11
dc.journal.number
4
dc.journal.pagination
1-18
dc.journal.pais
Suiza
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dc.journal.ciudad
Basilea
dc.description.fil
Fil: Cambeses, Aitor. Universidad de Granada; España
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Fil: Molina, José F.. Universidad de Granada; España
dc.description.fil
Fil: Morales, Irene. Universidad de Granada; España
dc.description.fil
Fil: Lázaro, Concepción. Universidad de Granada; España
dc.description.fil
Fil: Moreno Moreno, Juan Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
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Fil: Montero, Pilar. Universidad de Granada; España
dc.description.fil
Fil: Bea, Fernando. Universidad de Granada; España
dc.journal.title
Minerals
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.3390/min11040431
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.mdpi.com/2075-163X/11/4/431
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