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Mostrando ítems 81-90 de 2010
Field report: Sailing around the exhumed roots of the Mesozoic Patagonian paleo-accretionary wedge (Diego de Almagro Island, Chile)
(Elsevier B.V., 2018-09)
We undertook a boat expedition to explore the geological framework of a very remote, lesser-known island, in the Chilean Patagonia: the Diego de Almagro Island (latitude S51°33′). This uninhabited, ca. 400 km2 Island is ...
Overriding plate, mantle wedge, slab, and subslab contributions to seismic anisotropy beneath the northern Central Andean Plateau
(American Geophysical Union, 2016-07)
The Central Andean Plateau, the second‐highest plateau on Earth, overlies the subduction of the Nazca Plate beneath the central portion of South America. The origin of the high topography remains poorly understood, and ...
Three-dimensional elastic wave speeds in the northern Chile subduction zone: variations in hydration in the supraslab mantle
(Oxford University Press, 2016)
We use seismic tomography to investigate the state of the supraslab mantle beneath northern Chile, a part of the Nazca-South America Plate boundary known for frequent megathrust earthquakes and active volcanism. We performed ...
Structural evolution of the Andes in a transitional zone between flat and normal subduction (33°30′-33°45′S), Argentina and Chile
(Pergamon-Elsevier Science Ltd, 2002)
New evidences of rupture of crust and mantle in the subducted Nazca plate at intermediate-depth
(Pergamon-Elsevier Science Ltd, 2015-03)
Between 33°-36°S, the Nazca plate subducts below South American plate with an angle of ~30°, and it is seismically active until ~200-280km depth. At 33.5°S, the seismicity decreases drastically at 120km depth, just below ...
Structure of the subduction system in southern Peru from seismic array data
(American Geophysical Union, 2012-11-28)
The subduction zone in southern Peru is imaged using converted phases from teleseismic P, PP, and PKP waves and P wave tomography using local and teleseismic events with a linear array of 50 broadband seismic stations ...
The late Eocene–early Miocene El Maitén Belt evolution: Magmatic response to the changing subduction zone geodynamics
(Pergamon-Elsevier Science Ltd, 2020-11)
During Mid-Cenozoic times, voluminous and genetically heterogeneous volcanism took place across North Patagonia in response to a period of plate tectonic reorganization. One of these volcanic associations is represented ...
Geodynamic controls on magmatic arc migration and quiescence
(Elsevier Science, 2021-07)
Reconfigurations of magmatic arcs through time have been recognized since pioneering works, describing inland and trenchward arc migrations or magmatic shut-off lasting for several millions of years. These modifications ...