Na-K ion exchange reaction between rhyolitic glass and (Na, K)Cl aqueous solution under hydrothermal conditions
- Univ. of Tokyo (Japan)
- Chiba Univ. (Japan)
Hydrothermal experiments on ion exchange reactions were carried out using synthetic and natural rhyolitic glasses and (Na, K)Cl aqueous solution at 200-300{degree}C and 1,000 bars. The rhyolitic glass did not crystallize during the reaction even under hydrothermal conditions, and it behaved as a Na-K ion exchanger. The Na-K ion exchange properties of the glass were strongly influenced by its thermal history. Quenched glass preferentially fixed K rather than Na, and glass obtained by slow cooling showed the opposite trend. The present experimental results show clearly that glass as well as minerals can control the composition of the coexisting aqueous solution in hydrothermal systems. The present results also suggest that the chemical composition of coastal thermal waters in Japan is controlled by the two-stage episode of reaction between acidic volcanic rocks and seawater.
- OSTI ID:
- 6376750
- Journal Information:
- Geochimica et Cosmochimica Acta; (USA), Vol. 54:11; ISSN 0016-7037
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
58 GEOSCIENCES
HYDROTHERMAL SYSTEMS
LIQUID ION EXCHANGERS
ROCK-FLUID INTERACTIONS
RHYOLITES
HYDROTHERMAL ALTERATION
AMORPHOUS STATE
AQUEOUS SOLUTIONS
CRYSTALLIZATION
ION EXCHANGE
POTASSIUM IONS
SODIUM IONS
THERMAL WATERS
CHARGED PARTICLES
DISPERSIONS
ENERGY SYSTEMS
GEOTHERMAL SYSTEMS
IGNEOUS ROCKS
ION EXCHANGE MATERIALS
IONS
MATERIALS
MIXTURES
PHASE TRANSFORMATIONS
ROCKS
SOLUTIONS
VOLCANIC ROCKS
152003* - Geothermal Data & Theory- Rock-Water-Gas Interactions
580000 - Geosciences