The analysis of spatial distributions, origins of caldera-forming eruptions with basaltic-andesitic magma compositions, and genesis of Miocene ignimbrites of the Eastern volcanic belt, Kamchatka

• Published in: Geodynamics & Tectonophysics
• Main Authors: O. V. Bergal-Kuvikas, A. N. Rogozin, E. S. Klyapitsky
• Format: Article in Journal/Newspaper
• Language: English; Russian
• Published: Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust 2019
• Subjects: basaltic-andesitic ignimbrites; calderas; submarine eruptions; eastern volcanic belt; kamchatka; Science; Q; Kamchatka
• Online Access: https://doi.org/10.5800/GT-2019-10-3-0443; https://doaj.org/article/1c8a412aac8e4488bbf548039e13675e

Based on the statistical data of the Global Volcanism Program of the Smithsonian Institution and published materials, we present a comparative analysis of caldera-forming eruptions on global scale. The geodynamic settings and genesis of the caldera-forming eruptions with basaltic-andesitic magma compositions are described. The origin of the majority of mafic ignimbrites was related with external water. Such ignimbrites were generated in a submarine environment or with a contact with water. The newly obtained data, paleogeodynamic reconstruction and geological mapping of Miocene mafic ignimbrites of the Eastern volcanic belt (EVB) of Kamchatka confirm their genesis in costal-marine environment. These new data show significance of paleoreconstructions in studies of paleo-volcanoes and relief-forming pyroclastic rocks.