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dc.contributor.author
Guereschi, Alina Beatriz
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dc.contributor.author
Martino, Roberto Donato
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dc.date.available
2024-08-15T12:48:03Z
dc.date.issued
2008-03
dc.identifier.citation
Guereschi, Alina Beatriz; Martino, Roberto Donato; Field and Textural Evidence of Two Migmatization Event in the Sierras de Córdoba, Argentina; Elsevier Science; Gondwana Research; 13; 2; 3-2008; 176-188
dc.identifier.issn
1342-937X
dc.identifier.uri
http://hdl.handle.net/11336/242565
dc.description.abstract
In the metamorphic basement of the central eastern Sierra de Comechingones (Sierras Pampeanas of Córdoba, Argentina), two types of migmatites are found: Tala Cruz metatexites and Cañada del Sauce diatexites. Rafts of deformed metatexites in the diatexites are interpreted as dismembered and partially assimilated remnants of the Tala Cruz metatexites. Two migmatization events are recognized: the M2 metamorphic peak produced high-grade paragenesis and the first anatexis generating the metatexites; 810–840 °C and 8.5–9 kbar were calculated for M2. The M4 decompression event produced the diatexites by a second melting of the metatexites; 725–780 °C and 5.5–6 kbar were estimated for M4. A dynamic contractional M3 event in high-ductility and high-temperature conditions was recognized between the two migmatization events. A correlation could be established between the second migmatization event (M4) and the event dated as Cambrian (520–530 Ma) in other areas in the Sierras de Córdoba, in which case the first migmatization event (M2) would have been older, perhaps as old as Neoproterozoic. The tectonic evolution of the Sierra de Comechingones would imply the occurrence of extension–shortening cycles, interpreted as “pull–push” cycles mirroring the subduction and collision of Pampia terrane against the western Gondwana margin. These cycles would have controlled the evolution of the Eastern Sierras Pampeanas, during the Neoproterozoic?–Early Palaeozoic times.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Migmatites
dc.subject
Petrography
dc.subject
Textures
dc.subject
Sierras de Córdoba
dc.subject.classification
Geología
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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
Field and Textural Evidence of Two Migmatization Event in the Sierras de Córdoba, Argentina
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-08-14T14:16:27Z
dc.journal.volume
13
dc.journal.number
2
dc.journal.pagination
176-188
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Guereschi, Alina Beatriz. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geologia Básica y Aplicada; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
dc.description.fil
Fil: Martino, Roberto Donato. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geologia Básica y Aplicada; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
dc.journal.title
Gondwana Research
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1342937X07001608
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.gr.2007.07.005
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