@inproceedings{48722bb622b54a73ae3a68059b6e626d,
title = "Field trip guide: Ridge-trench collision - The southern Patagonian Cordillera east of the Chile Triple Junction",
abstract = "The southern Patagonian Cordillera south of the present location of the Chile Triple Junction (46.5°S) preserves distinctive deformational and backarc magmatic features that are a consequence of a series of northward-propagating ridge collision events that started at ca. 14 Ma. An abrupt increase of ∼2000 m of topographic elevation and the exhumation and uplift of mid-Miocene to Pliocene plutons within the cordillera south of the Chile Triple Junction is accomplished by horizontal compressive deformation (both thin- and thick-skinned) within the Patagonian fold-thrust belt. Ridge-trench collisions have formed asthenospheric slab windows beneath the southern Patagonian Cordillera. Backarc magmatism associated with slab window formation includes a distinctive suite of adakites and extensive outpourings of oceanic island basalt (OIB)-like plateau basalts. The adakites formed from the partial melting of the young, hot trailing edge of the Nazca plate that preceded slab window opening, whereas the OIB-like plateau basalts formed from dynamic asthenospheric flow as the slab windows opened up beneath the backarc.",
keywords = "Chile Triple Junction, Patagonia, Ridge-trench collision, Slab window, Southern Andes",
author = "Gorring, {Matthew L.}",
year = "2008",
doi = "10.1130/2008.0013(01)",
language = "English",
series = "GSA Field Guides",
publisher = "Geological Society of America",
pages = "1--22",
booktitle = "GSA Field Guides",
address = "United States",
}