Patterns in the Transformation of the Composition and Properties of Volcanogenic Rocks in Hydrothermal–Magmatic Systems of the Kuril–Kamchatka Island Arcстатья
Статья опубликована в журнале из перечня ВАК
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 9 ноября 2017 г.
Аннотация:Hydrothermal–magmatic systems of the Kuril–Kamchatka island arc were formed in Neogene-
Quaternary volcanic rocks. Acting on host rocks, thermal waters induced their alternation and transformation into hydrothermal–metasomatic rocks, such as propylites, secondary quartzites, zeolitic rocks, argillic rocks,opalites, quartzadularia metasomatites, etc. The dynamics of changes in rock properties during the hydrothermal process depends on a number of factors, including the features of primary rocks, temperature, pressure and composition of thermal fluids, fluid phase, fluid pH, and duration of fluid–rock interaction. Deep high-temperature fluids cause consolidation and hardening of the rocks, an increase in deformational properties, and a decrease in porosity and permeability, regardless of fluid composition. The chemical composition and acidity–alkalinity of thermal fluids have a significant influence on the alteration of rock properties during low-temperature hydrothermal processes.