The Miocene Magmatism in the Malargüe and Chos Malal Fold and Thrust Belts
- Litvak, Vanesa Dafne
- Iannelli, Sofía
- Fernández Paz, Lucía
- Folguera Telichevsky, Andres
DOIAbstract
Late Oligocene to Pliocene magmatism at the latitudes of Malargüe and Chos Malal fold and thrust belts, in Neuquén basin, is distributed from the main Andean axis to the retroarc zone. While arc magmatism maintained relatively similar compositional and geochemical features during late Oligocene to Pliocene times, major variations are seen in volcanic sequences developed in the retroarc zone, due to the development of the shallow subduction regime by mid-late Miocene times. Thus, late Oligocene-early Miocene period is characterized by an extensional regime that conditioned mainly tholeiitic magmas in the main Andean axis and alkaline, intraplate magmas in the retroarc zone. Early-late Miocene marks a change to more compressional tectonics in...
Add to ORKG