Mоделирование условий формирования проницаемых каналов гейзеров в риолитовых туфах.

Т.В. Рычкова, А.В. Кирюхин

Research output: Contribution to conferenceAbstract

Abstract

TOUGHREACT modeling of the conditions for the formation of self-insulating channels for discharge thermal waters (including geyser channels) has been performed. The results showed that in rhyolite tuffs represented by volcanic glass, this is possible. This process occurs as a result of an increase of porosity and permeability in the axial part of the upflow of thermal waters, as well as a decrease in porosity and permeability in the peripheral shell of the upflow of thermal waters. Changes in porosity and permeability are associated with changes in pore space during hydrothermal transformations. The original volcanic glass dissolves and secondary minerals are generated (mainly amorphous silica) (geyserite)). Amorphous silica isolates highly permeable channels from cold groundwater, which, together with other thermo-gas-hydrodynamic conditions, provides the formation of geysers.
Original languageRussian
Pages155-159
StatePublished - 2019
Externally publishedYes

Keywords

  • geyser
  • hydrothermal system
  • permeability
  • porosity
  • rocks of rhyolitic composition
  • secondary minerals
  • volcanic glass
  • вторичные минералы
  • вулканическое стекло
  • гейзер
  • гидротермальная система
  • пористость
  • породы риолитового состава
  • проницаемость

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