Buscar
Mostrando ítems 1-10 de 56
Surface and mantle records reveal an ancient slab tear beneath Gondwana
(Springer, 2019-12)
Vertical slab-tearing has been widely reported in modern convergent settings profoundly influencing subduction and mantle dynamics. However, evaluating a similar impact in ancient convergent settings, where oceanic plates ...
The slab gap-related Late Cretaceous-Paleocene magmatism of southern Patagonia
(Elsevier, 2021-09)
The only Late Cretaceous-Paleocene intraplate magmatic unit of southern Patagonia, known as the Las Mercedes basalt, is petrogenetically studied in its geodynamic context. The outcrops of this unit are thin ridges located ...
Effects of change in slab geometry on the mantle flow and slab fabric in Southern Peru
(American Geophysical Union, 2016-10)
The effects of complex slab geometries on the surrounding mantle flow field are still poorly understood. Here we combine shear wave velocity structure with Rayleigh wave phase anisotropy to examine these effects in southern ...
Seismicity and state of stress in the central and southern Peruvian flat slab
(Elsevier, 2016-05)
We have determined the Wadati–Benioff Zone seismicity and state of stress of the subducting Nazca slab beneath central and southern Peru using data from three recently deployed local seismic networks. Our relocated hypocenters ...
Quaternary Deformation in the Neuquén Basin, Explained by the Interaction Between Mantle Dynamics and Tectonics
(Springer, 2020)
Quaternary deformations described in the retro-arc region at the latitudes of the Neuquén Basin can be divided into two main groups: a northern group characterized by Quaternary deformation zones concentrated near the main ...
The role of ridges in the formation and longevity of flat slabs
(Nature Research, 2015-08)
Flat-slab subduction occurs when the descending plate becomes horizontal at some depth before resuming its descent into the mantle. It is often proposed as a mechanism for the uplifting of deep crustal rocks (‘thick-skinned’ ...
A review about the quaternary upper-plate deformation in the Southern Central Andes (36–38°S): A plausible interaction between mantle dynamics and tectonics
(Pergamon-Elsevier Science Ltd, 2018-11)
Quaternary deformation in the Southern Central Andes between 36° and 38°S is disconnected, noncontinuous and not particularly tracing the main mountain topographic fronts. This pattern contrasts to the one to the north ...
Plume Subduction Beneath the Neuquén Basin and the Last Mountain Building Stage of the Southern Central Andes
(Springer Nature Switzerland AG, 2020)
The occurrence of a Neogene shallow subduction stage, as well as, a Pliocene slab-tearing, and steepening of the Nazca plate in the southern Central Andes are well established. However, a satisfactory explanation for the ...
The origin of the Loncopué Trough in the retroarc of the Southern Central Andes from field, geophysical and geochemical data
(Elsevier Science, 2014-12)
This work analyzes through field, geophysical, geochemical and geochronological data, a particular setting of the Southern Andes in which an extensional system is flanking the mountain front. This setting is represented ...
A recent tear in subducting plate explains seismicity and upper mantle structure of southern Costa Rica
(2020-11-12)
Past studies of southern Costa Rica have generated a multitude of tectonic scenarios to account for different data sets. Flat slabs, detached slabs, and slab windows have been proposed to address the uplift of the Cordillera ...