Jurassic volcanism of the Chon Aike Silicic LIP in the northeastern Deseado Massif
- Navarrete Granzotto, César Rodrigo
- Hurley, Maria
- Butler, K.
- Liendo, I.
- Litvak, Vanesa Dafne
- Folguera Telichevsky, Andres
DOIAbstract
Two compositionally different volcanic cycles are documented by geological mapping, lithofacies and petrographic analyses of Jurassic volcanic rocks in the northeastern sector of the Deseado Massif, constituting the western counterpart of the Karoo-Ferrar LIPs in Patagonia. The first cycle is of intermediate composition and is represented by andesitic lava flows, phenoandesitic moderate-grade ignimbrites and volcaniclastic deposits. These rocks constitute a previously unknown large outcrop (~100 km2) of the Bajo Pobre Formation. The second cycle (Chon Aike Formation) is acidic in composition and constituted by several pyroclastic deposits (ignimbrites and co-ignimbrite lag breccias), lavic bodies (rhyolitic lava domes, dykes, and coulees) a...
Add to ORKG