30 million years of Permian volcanism recorded in the Choiyoi igneous province (W Argentina) and their source for younger ash fall deposits in the Parana Basin: SHRIMP U-Pb zircon geochronology evidence

Rocha-Campos, A.C.; Basei, Miguel Angelo Stipp; Nutman, Allen; Kleiman, Laura E.; Varela, R.; Llambias, E.; Canile, F.M.; de C.R. da Rosa, O.

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30 million years of Permian volcanism recorded in the Choiyoi igneous province (W Argentina) and their source for younger ash fall deposits in the Parana Basin: SHRIMP U-Pb zircon geochronology evidence

Date

2011

Authors

Rocha-Campos, A.C.

Basei, Miguel Angelo Stipp

Nutman, Allen

Kleiman, Laura E.

Varela, R.

Llambias, E.

Canile, F.M.

de C.R. da Rosa, O.

Publisher

Elsevier

Abstract

We present four SHRIMP U-Pb zircon ages for the Choiyoi igneous province from the San Rafael Block, central-western Argentina. Dated samples come from the Yacimiento Los Reyunos Formation (281.4 ± 2.5. Ma) of the Cochicó Group (Lower Choiyoi section: an