Abstract
This study is concerned with structural and mineralogic transformations and changes in the physical and mechanical properties of volcanogenic sedimentary rocks in the North Paramushir hydrothermal magmatic system as a result of the interaction with thermal waters of various compositions and origins. We identified the following hydrothermal metasomatic facies that developed in tuffites and tuffs: opalites (monoopalite, opal–clay, and opal–alunite), as well as low- and moderate-temperature propylites. We show the position of each new facies in the structure of the hydrothermal magmatic system. We obtained correlative relationships of the physical and mechanical properties of the rock to the intensity and character of secondary alteration. It is pointed out that all of these rocks obey a common trend in the interrelationships between their properties, which may provide evidence of a common origin and progressive direction of hydrothermal processes in the interior of the North Paramushir system.
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Original Russian Text © Yu.V. Frolova, S.N. Rychagov, V.M. Ladygin, M.V. Luchko, M.S. Chernov, I.A. Boikova, 2016, published in Vulkanologiya i Seismologiya, 2016, No. 3, pp. 22–40.
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Frolova, Y.V., Rychagov, S.N., Ladygin, V.M. et al. Variation in the physical and mechanical properties of rocks: The North Paramushir hydrothermal magmatic system, Kuril Islands. J. Volcanolog. Seismol. 10, 170–187 (2016). https://doi.org/10.1134/S0742046316030039
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DOI: https://doi.org/10.1134/S0742046316030039