9783319295916 - SpringerBriefs in Earth System Sciences Early Cretaceous Volcanism in Central and Eastern Argentina During Gondwana Break-Up - Silvia Leonor Lagorio Haroldo Vizán Silvana E Geuna Kartoniert (TB)

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This book analyzes the Early Cretaceous volcanic processes in Misiones Province and in Sierra Chica de Córdoba (Argentina). The volcanism in Misiones is tholeiitic and belongs to the Parana Magmatic Province (PMP) which extends throughout South America. In contrast the volcanism in Córdoba is geographically restricted and of alkaline nature representing a potassic locality peripheral to the PMP. To understand the causes of and geodynamic processes involved in these volcanisms a new 40Ar 39Ar of 129.6 ± 1 Ma of a trachyte from Sierra Chica de Córdoba is presented. This dating points out that the volcanism in Sierra Chica de Córdoba slightly postdates PMP lavas. Moreover complementary geochemical analyses from Misiones Province are presented and compared with those from the whole PMP in order to characterize its source

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05.04.2025 um 08:12 Uhr

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9783319295916

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3319295918

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