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Taitao granites and Taitao ophiolites would be mainly focused on in this part. Chile ridge is located west of the Taitao Peninsula, and the geology of Chile Ridge is closely associated with that of Taitao Peninsula. [1] [2] [3] Taitao ophiolite (Spanish: Ofiolita de Taitao) is an ophiolite in Taitao Peninsula of western Patagonia, Chile.
Taitao ophiolite, and other geological features, are associated with the triple junction. [5] As the Chile Rise has subducted beneath the South American Plate at the Taitao Peninsula, three ridge–continent collisions have occurred over the last 5 million years ago, approximately. [5]
The Chile triple junction, a geologic junction off the southern coast of Chile where the South American, Nazca and Antarctic tectonic plates meet. The Chile triple junction (or Chile margin triple junction) is a geologic triple junction located on the seafloor of the Pacific Ocean off Taitao and Tres Montes Peninsula on the southern coast of Chile.
Chile ridge is located west of the Taitao Peninsula, and the geology of Chile Ridge is closely associated with that of Taitao Peninsula. [ 5 ] [ 6 ] [ 4 ] Adakite is a felsic to intermediate rock and are usually calc-alkaline in composition.
The geology of Chile is a characterized by processes linked to subduction, ... At Taitao, the Chile triple junction and the Nazca plate subduct the South American plate.
Chaicayán Group is a group of poorly defined sedimentary rock strata found in Taitao Peninsula in the west coast of Patagonia. The most common rock types are siltstone and sandstone. Conglomerate occur but is less common. [1] Study of fossils and uranium–lead dating of detrital zircons indicate a Miocene age, at least for the upper sequences.
Starting 4 million years ago the Chile Ridge collided with the Peru–Chile Trench. This collision originally occurred west of Tierra del Fuego, but has since moved northward towards the Taitao Peninsula. Farther south the interaction between the Scotia and South America plates gave rise to the Deseado and Magallanes-Fagnano faults. [20]
The Isthmus of Ofqui is a narrow isthmus that connects the Taitao Peninsula with the Chilean mainland. The isthmus is bounded in the south by the Gulf of Penas, in the north by the San Rafael Lagoon, in the west by the Taitao Peninsula and in the east by the Northern Patagonia Ice Field.