Western thrusting and uplift in northern Central Andes (western Peruvian margin)

Alice Prudhomme, Patrice Baby, Alexandra Robert, Stéphanie Brichau, Edward Cuipa, Adrien Eude, Ysabel Calderon, Paul O’Sullivan

Producción científica: Capítulo del libro/informe/acta de congresoCapítulorevisión exhaustiva

15 Citas (Scopus)

Resumen

Tectonostratigraphic revision and a crustal balanced cross-section of the northern Peruvian margin show that the Western Andean Escarpment and the Calipuy Plateau-Basin topographic features are related to a major west-verging basement thrust: the Western Andean Escarpment Thrust (WAET). Thermochronological data through the Coastal Batholith display a regional exhumation since at least 29Ma and a step-change pattern in the cooling ages that we partly attribute to the WAET activation. Thermal modeling shows higher exhumation rates (~170-270m/Myr) between 12 and 8Ma, due to the onset of the Nazca Ridge subduction. This regional offshore-onshore study allows as well to unravel the Paleogene-Neogene complex tectonic evolution of the northern Peruvian Andes: (1) a middle Eocene regional erosion (~41Ma) erasing the Incaic orogen nowadays partially preserved in the Western Cordillera and in the offshore Trujillo-Salaverry basins; (2) a late Eocene to early Oligocene postorogenic relaxation and extension (Yaquina and Trujillo basins); (3) the westward WAET propagation and a ~150km eastward jump of the double verging Andean orogen since the late Oligocene.

Idioma originalInglés
Título de la publicación alojadaAndean Tectonics
EditorialElsevier Inc.
Páginas299-331
Número de páginas33
ISBN (versión digital)9780128160091
ISBN (versión impresa)9780128160107
DOI
EstadoPublicada - 1 ene. 2019
Publicado de forma externa

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