Tectonic development of the North Patagonian Andes and their related Miocene foreland basin (41°30'-43°S)
- Orts, Darío Leandro
- Folguera Telichevsky, Andres
- Encinas, Alfonso
- Ramos, Miguel Esteban
- Tobal, Jonathan Elías
- Ramos, Victor Alberto
DOIAbstract
The Northern Patagonian Andes have been constructed through multiple mechanisms that range from tectonic inversion of extensional structures of Early to Middle Jurassic age in the Main Andes to Oligocene in the Precordilleran region. These have acted during two distinctive orogenic stages, first in late Early Cretaceous and later in Miocene times Late Oligocene extension separates these two contractional periods and is recorded by half-grabens developed in the retroarc region. The last contractional stage coexists with an eastward foreland expansion of the late Miocene arc whose roots are presently exposed as minor granitic stocks and volcanic piles subordinately in the Main Andes, east of the present arc. As a consequence of this orogenic ...
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