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

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

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.

本文言語English
ホスト出版物のタイトルWater-Rock Interaction - Proceedings of the 12th International Symposium on Water-Rock Interaction, WRI-12
ページ647-651
ページ数5
出版ステータスPublished - 2007 12 1
イベント12th International Symposium on Water-Rock Interaction, WRI-12 - Kunming, China
継続期間: 2007 7 312007 8 4

出版物シリーズ

名前Water-Rock Interaction - Proceedings of the 12th International Symposium on Water-Rock Interaction, WRI-12
1

Other

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

ASJC Scopus subject areas

  • 地球化学および岩石学
  • 水の科学と技術

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