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Mostrando ítems 61-70 de 2010
Internal deformation of the subducted Nazca slab inferred from seismic anisotropy
(Nature Research, 2015-11-23)
Within oceanic lithosphere a fossilized fabric is often preserved originating from the time of plate formation. Such fabric is thought to form at the mid-ocean ridge when olivine crystals align with the direction of plate ...
Neogene Patagonian magmatism between the rupture of the Farallon plate and the Chile Ridge subduction
(PERGAMON-ELSEVIER SCIENCE LTD, 2021-10)
Based on chemical composition and timing of late Paleogene and Neogene igneous rocks in southern Patagonia, six igneous suites are identified and correlated with subduction processes during the approaching and subduction ...
The nature of the subduction wedge in an erosive margin: Insights from the analysis of aftershocks of the 2015 Mw 8.3 Illapel earthquake beneath the Chilean Coastal Range
(Elsevier B.V., 2019)
© 2019 Elsevier B.V.Aftershocks of the 16 September 2015 M8.3 Illapel earthquake in central Chile were recorded for a period of one year by the Chile-Illapel Aftershock Experiment (CHILLAX) seismic network. An initial ...
The first since 1960: a large event in the Valdivia segment of the Chilean subduction zone, the 2016 M7.6 Melinka earthquake
(Elsevier, 2017)
We present results for joint kinematic inversion of high-rate GPS, strong motion and InSAR data for the 2016 M7.6 Melinka earthquake. We show that the source is a compact 35 s long rupture with 5.0 +/- 0.15 m of peak slip. ...
Titanian clinohumite and chondrodite in antigorite serpentinites from Central Chile: evidence for deep and cold subduction
(E Schweizerbartsche Verlagsbuchhandlung, 2017)
Humite minerals, including Ti-rich, hydroxyl-dominant chondrodite and clinohumite, occur in Paleozoic antigorite serpentinite in the La Cabana area, in the Chilean Coastal Cordillera (similar to 38 degrees 30'S- 73 degrees ...
PACIFIC SUBDUCTION COEVAL WITH THE KAROO MANTLE PLUME: THE EARLY JURASSIC SUBCORDILLERAN BELT OF NORTHWESTERN PATAGONIA
(G S L, 2005)
The Early Mesozoic magmatism of southwestern Gondwana is reviewed in the light of new U-Pb SHRIMP zircon ages (181 ± 2 Ma, 181 ± 3 Ma, 185 ± 2 Ma, and 182 ± 2 Ma) that establish an Early Jurassic age for the granites of ...
Southward-Directed Subduction of the Farallon–Aluk Spreading Ridge and Its Impact on Subduction Mechanics and Andean Arc Magmatism: Insights From Geochemical and Seismic Tomographic Data
(Frontiers Research Foundation, 2020-05)
Since the initial proposal of the past existence of a southward-directed mid-ocean ridge–subduction interaction in the Andes during Late Cretaceous–Paleogene times, several studies have been devoted to uncover the ...
Subduction system and flat slab beneath the Eastern Cordillera of Colombia
Seismicity at the northern terminus of the Nazca subduction is diffused over a wide area containing the puzzling seismic feature known as the Bucaramanga nest. We relocate about 5000 earthquakes recorded by the Colombian ...