Sm-Nd dating of metamorphism of the Sierra de las Imanas (Sierras Pampeanas Occidentales, Argentina)
| Autor: | Galindo, Carmen, Murra, J., Baldo, Edgardo G., Casquet Martín, César, Rapela, C., Pankhurst, R. J., Dahlquist, J. A. |
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| Jazyk: | Spanish; Castilian |
| Rok vydání: | 2003 |
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| Zdroj: | Arias Montano. Repositorio Institucional de la Universidad de Huelva instname |
| Popis: | Sm-Nd garnet geochronology of a migmatite gneiss from the Sierra de las Imanas (Western Sierras Pampeanas) has provided a peak metamorphic age of 464.6 ± 4.5 Ma, i.e., Middle Ordovician, corresponding to the Famatinian orogeny of Western Argentina This age agrees with metamorphic ages obtained in nearby areas by U-Pb SHRIMP dating of zircon overgrowths. This coincidence confirms the reliability of the Sm-Nd garnet chronometer in the study of metamorphic terranes. A Proterozoic Toxt age of 1628 Ma suggests the involvement of an old recycled crustal component in the sedimentary protolith of the migmatite |
| Databáze: | OpenAIRE |
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