Dissolution and deposition behavior of granite and calc-silicate rock in CO 2-saturated hydrothermal system

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

To investigate the possibility of fixing CO 2 as carbonates in high temperature formations, hydrothermal reaction experiments were conducted in CO 2-saturated fluid at 200 and 300°C. Numerical computations of phase equilibria based on the experimental results were carried out. The experiments with granite and calc-silicate rock showed that the dissolution of Ca-bearing minerals and the deposition of secondary minerals were encouraged in CO 2-saturated system. According to EDX analysis and numerical phase equilibrium calculations, the secondary minerals formed might be diaspore, kaolinite, clay minerals (such as smectite, muscovite), Ca-alminosilicates (such as clinozoisite, laumontite, prehnite, wairakite) and calcite. However, there was no direct evidence for the formation of calcite. It is implied that the precipitation rate of calcite is relatively slow and the formation of Ca-alminosilicates occur much easily than calcite even if solution is supersaturated with respect to calcite.

Original languageEnglish
Title of host publicationWater-Rock Interaction - Proceedings of the 12th International Symposium on Water-Rock Interaction, WRI-12
Pages647-651
Number of pages5
Publication statusPublished - 2007 Dec 1
Event12th International Symposium on Water-Rock Interaction, WRI-12 - Kunming, China
Duration: 2007 Jul 312007 Aug 4

Publication series

NameWater-Rock Interaction - Proceedings of the 12th International Symposium on Water-Rock Interaction, WRI-12
Volume1

Other

Other12th International Symposium on Water-Rock Interaction, WRI-12
CountryChina
CityKunming
Period07/7/3107/8/4

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Water Science and Technology

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  • Cite this

    Suto, Y., Tsuchiya, N., & Hashida, T. (2007). Dissolution and deposition behavior of granite and calc-silicate rock in CO 2-saturated hydrothermal system. In Water-Rock Interaction - Proceedings of the 12th International Symposium on Water-Rock Interaction, WRI-12 (pp. 647-651). (Water-Rock Interaction - Proceedings of the 12th International Symposium on Water-Rock Interaction, WRI-12; Vol. 1).