U–Pb SHRIMP zircon dating of Grenvillian metamorphism in Western Sierras Pampeanas (Argentina): Correlation with the Arequipa-Antofalla craton and constraints on the extent of the Precordillera Terrane

Metamorphism of Grenvillian age (ca. 1.2 Ga; U–Pb zircon dating) is recognized for the first time in the Western Sierras Pampeanas (Sierra de Maz). Conditions reached granulite facies (ca. 780 °C and ca. 780 MPa). Comparing geochronological and petrological characteristics with other outcrops of Mes...

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Detalles Bibliográficos
Autores: Casquet Martín, César, Pankhurst, R.J., Fanning, C.M., Baldo, Edgardo G., Galindo Francisco, María Del Carmen, Rapela, Carlos W., González Casado, José Manuel, Dahlquist, Juan A.
Tipo de recurso: artículo
Fecha de publicación:2006
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/49545
Acceso en línea:https://hdl.handle.net/20.500.14352/49545
Access Level:acceso abierto
Palabra clave:552.4(82)
Sierras Pampeanas
Argentina
Metamorphism
U–Pb SHRIMP zircon dating
Grenville
Petrología
Descripción
Sumario:Metamorphism of Grenvillian age (ca. 1.2 Ga; U–Pb zircon dating) is recognized for the first time in the Western Sierras Pampeanas (Sierra de Maz). Conditions reached granulite facies (ca. 780 °C and ca. 780 MPa). Comparing geochronological and petrological characteristics with other outcrops of Mesoproterozoic basement, particularly in the northern and central Arequipa-Antofalla craton, we suggest that these regions were part of a single continental crustal block from Mesoproterozoic times, and thus autochthonous or parautochthonous to Gondwana.

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