The Malvinas Basin (Spanish: Cuenca de Malvinas) is a major sedimentary basin in the Argentine Shelf offshore southern Patagonia. The basin bounds to the west with the Río Chico-Dungeness High that separates it from the Magallanes Basin. Contrary to the neighboring North Falkland Basin and Magallanes Basin Malvinas Basin is not known to have commercial hydrocarbon reserves.