Abstract
The article discusses the seismotectonic model of the lithosphere of a part of the South American Plate from the deep-water trench in the west to the Mid-Atlantic graben in the east. The goal is to explain the differentiation of the lithostatic leveling forces, which create a local concentration of tectonic stresses within the western margin of the plate. The authors carried out the analysis of the stress-strain state of this zone in comparison with the localization of foci of strong earthquakes and aftershocks. It is shown that the concentration of shear stresses in the transition from the oceanic to the continental lithosphere at a depth of 40–50 km creates conditions for the occurrence of foci of strong crustal earthquakes. Tensile stresses at depths above 80–120 km cause the formation of mantle melt pathways to the surface and the formation of the Chilean Andes volcanic belt.
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Acknowledgements
The authors would like to express their gratitude to our colleagues for their help in writing this article: A.I. Manevich, T.A. Tatarinova, E.Yu. Firsova.
This work was conducted in the framework of budgetary funding of GC RAS, adopted by the Ministry of Science and Higher Education of the Russian Federation.
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Morozov, V., Tatarinov, V., Kagan, A. (2021). Seismotectonic Model of the Western Margin of the South American Plate. In: Svalova, V. (eds) Heat-Mass Transfer and Geodynamics of the Lithosphere. Innovation and Discovery in Russian Science and Engineering. Springer, Cham. https://doi.org/10.1007/978-3-030-63571-8_28
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DOI: https://doi.org/10.1007/978-3-030-63571-8_28
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