Empirical expressions of quartz solubility in H_2O, H_2O + CO_2, and H_2O + NaCl fluids

この論文にアクセスする

この論文をさがす

著者

抄録

An empirical equation of quartz solubility in H<sub>2</sub>O at elevated pressures and temperatures (up to 10 kb and 900°C) is obtained based on the published experimental results. The resultant solubility equation is as follows: lnS<sub>water</sub> = –1.51914 + 1.99970lnρ<sub>water</sub> – 2636.78<i>T</i><sup>–1</sup> + 0.00387766<i>T</i> + 0.0198582<i>PT</i><sup>–1</sup>, where <i>S</i><sub>water</sub>, <i>P</i><sub>water</sub>, <i>T</i>, and <i>P</i> stand for quartz solubility (mol/kg H<sub>2</sub>O), density (g/cm<sup>3</sup>) of pure water, temperature (Kelvin), and pressure (bar), respectively. Densities of pure water are calculated by the equation of Haar <i>et al.</i> (1984). The solubility equation is then modified for describing the solubility behavior of quartz in H<sub>2</sub>O + CO<sub>2</sub> or H<sub>2</sub>O + NaCl fluid. For the modification, this study uses the weight fraction of water in the solvent (<i>F</i>), density of the aqueous fluid (ρ<sub>aq</sub>), and an empirical constant (Θ) as the additional terms. The ratio of quartz solubility in aqueous fluid (<i>S</i><sub>aq</sub>) to that in pure water (<i>S</i><sub>water</sub>) at the same pressure-temperature condition is then expressed as ln(<i>S</i><sub>aq</sub>/<i>S</i><sub>water</sub>) = Θln(ρ<sub>aq</sub><i>F</i>/ρ<sub>water</sub>). Densities of H<sub>2</sub>O + CO<sub>2</sub> and H<sub>2</sub>O + NaCl fluids are computed with the equations of Kerrick and Jacobs (1981) and Anderko and Pitzer (1993a), respectively. The empirical constant for quartz solubility in H<sub>2</sub>O + CO<sub>2</sub> fluid is 1.49063. For obtaining the constant, this study considers the published experimental results done at 1.5 kb to 5 kb, 600° to 700°C, and up to 71 wt% CO<sub>2</sub> concentration (mole fraction of CO<sub>2</sub> = 0.505). The O value for quartz solubility in H<sub>2</sub>O + NaCl fluid is 3.24740, which gives the calculated solubilities consistent with the experimental results done at 0.2 kb to 2 kb, 200° to 700°C, and up to 33.6 wt% NaCl concentration.

収録刊行物

  • Geochemical journal : journal of the Geochemical Society of Japan

    Geochemical journal : journal of the Geochemical Society of Japan 30(6), 339-354, 1996-12-01

    GEOCHEMICAL SOCIETY OF JAPAN

参考文献:  50件中 1-50件 を表示

被引用文献:  1件中 1-1件 を表示

各種コード

  • NII論文ID(NAID)
    10008801269
  • NII書誌ID(NCID)
    AA00654975
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00167002
  • NDL 記事登録ID
    4142646
  • NDL 雑誌分類
    ZM41(科学技術--地球科学)
  • NDL 請求記号
    Z53-R488
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
ページトップへ