Tectonic significance and consequences of the Gondwanide orogeny in northern Patagonia, Argentina
- Gregori, Daniel Alfredo
- Kostadinoff, Jose
- Strazzere, Leonardo
- Raniolo, Luis Ariel
DOIAbstract
The tectonic configuration of northern Patagonia is recognized through geological and geophysical studies, which define several areas characterized by positive and negative gravity anomalies with steep gravity gradients. Positive areas are interpreted as continental crust with Grenvillian and Pampean basement. The Pampean basement occurs to the north and south of the interpreted suture between Patagonia and Gondwana South America. Most negative anomalies are interpreted to represent Gondwana igneous and sedimentary rocks. Areas characterized by steep gravity gradients are coincident with shear zones and mylonitic belts that were active during Gondwana times, a period of great magmatic and tectonic activity in northern Patagonia. Dextral mov...
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