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Interaction between magmatic fluid and meteoric water, inferred from 18O/16O and 36Ar/H2O ratios of fumarolic gases at the Kusatsu Shirane volcano, Japan

Abstract

Fumarolic gases from the Kusatsu Shirane volcano, Japan were analyzed for the content and isotopic compositions of H2O, the abundances and isotopic compositions of noble gas. The observed δ18O and 36Ar/H2O ratios could not be explained by an existing hydrothermal model in which a mixing between magmatic vapor (MAV) and meteoric water (ASW), a single-step separation to vapor and liquid phases and a subsequent partial H2O vapor removal from the vapor phase have been considered. We constructed a revised model in which two-step mixing-separation and a subsequent partial H2O vapor removal by condensation were considered. In the model, the first step was the mixing between MAV and ASW, and a subsequent separation to a primary vapor and liquid phases. In the secondary step, the primary vapor mixed with another fluid which has a δ18O lower than the primary vapor phase and a low 36Ar/H2O ratio relative to ASW. The mixture separates to secondary vapor and liquid phases. The fluid with low 36Ar/H2O ratio could be ASW partially vaporized in the geothermal area. The secondary vapor ascended and discharged as fumarolic gas. In the ascending process, the secondary vapor suffers a partial H2O vapor removal by condensation in various degrees.

References

  • Aka, F. T., M. Kusakabe, K. Nagao, and G. Tanyileke, Noble gas isotopic compositions and water/gas chemistry of soda springs from the islands of Bioko, São Tome and Annobon, along with Cameroon Volcanic Line, West Africa, Appl. Geochem., 16, 323–338, 2001.

    Article  Google Scholar 

  • Coleman, M. L., T. J. Shepherd, J.J. Durham, J. E. Rouse, and G. R. Moore, Reduction of water with zinc for hydrogen isotope analysis, Anal. Chem., 54, 993–995, 1982.

    Article  Google Scholar 

  • Epstein, S. and T. K. Mayeda, Variation of O18 content of waters from natural sources, Geochim. Cosmochim. Acta, 4, 213–224, 1953.

    Article  Google Scholar 

  • Faculty of Engineering, Tokyo Institute of Technology, Faculty of Science and Technology, Sophia University, and Faculty of Technology, Saitama University, Geochemical study on the 1982–1983 eruption of the Kusatsu-Shirane volcano (I), Report of Coordinating Committee for Prediction of Volcanic Eruptions, 26, 8–9, 1983 (in Japanese).

    Google Scholar 

  • Giggenbach, W. F. and R. L. Goguel, Collection and analysis of geothermal and volcanic water and gas discharges, DSIR Chemistry Division Report, 2401, 1–81, 1989.

    Google Scholar 

  • Hanyu, T. and I. Kaneoka, Magmatic processes revealed by noble gas signatures: the case of Unzen Volcano, Japan, Geochem. J., 31, 395–405, 1997.

    Article  Google Scholar 

  • Harvey, A. H. and J. M. H. L. Sengers, Correlation of aqueous Henry’s constants from 0°C to the critical point, AIChEJ., 36, 539–546, 1990.

    Article  Google Scholar 

  • Hiyagon, H., M. Ozima, B. M. Marty, S. Zashu, and H. Sasaki, Noble gases in submarine glasses from mid-oceanic ridges and Loihi seamount: Constructions on the early history of the Earth, Geochim. Cosmochim. Acta, 56, 1301–1316, 1992.

    Article  Google Scholar 

  • Hoefs, J., Stable Isotope Geochemistry, 241 pp., Springer, New York, 1980.

    Book  Google Scholar 

  • Horita, J. and D. J. Wesolowski, Liquid-vapor fractionation of oxygen and hydrogen isotopes of water from the freezing to the critical temperature, Geochim. Cosmochim. Acta, 58, 3425–3437, 1994.

    Article  Google Scholar 

  • Kagiyama, T, J. Hirabayashi, T. Ohba, and M. Iguchi, Geothermal avtivity at Kusatsu-Shirane volcano, Rep. Joint Observation of Kusatsu-Shirane Volcano, 37–44, 1992 (in Japanese).

  • Kusakabe, M. and O. Matsubaya, Volatiles in Magmas, volcanic gases, and thermal waters, Bull. Vol. Soc. Japan, 30, S267–S283, 1986 (in Japanese with English abstract).

    Google Scholar 

  • Kusakabe, M., H. Sato, S. Nakada, and T. Kitamura, Water contents and hydrogen isotopic ratios of rocks and minerals from the 1991 eruption of Unzen volcano, Japan, J. Volcanol. Geotherm. Res., 89, 231–242, 1999.

    Article  Google Scholar 

  • Matsuhisa, Y., Oxygen isotopic compositions of volcanic rocks from the east Japan island arcs and their bearing on petrogenesis, J. Volcanol. Geotherm. Res., 5, 271–296, 1979.

    Article  Google Scholar 

  • Matsuhisa, Y., and H. Kurasawa, Oxygen and strontium isotopic characteristics of calc-alkalic volcanic rocks from the central and western Japan arcs: evaluation of contribution of crustal components to the magmas, In Arc Volcanism, edited by S. Aramaki and I. Kushiro, J. Volcanol. Geotherm. Res., 18, 483–510, 1983.

    Article  Google Scholar 

  • Niedermann, S., W. Bach, and J. Erzinger, Noble gas evidence for a lower mantle in MORBs from the southern East Pacific Rise: Decoupling of helium and neon isotope systematics, Geochim. Cosmochim. Acta, 61, 2697–2715, 1997.

    Article  Google Scholar 

  • Ohba, T, J. Hirabayashi, and K. Nogami, D/H and 18O/16O ratios of water in the crater lake at Kusatsu-Shirane volcano, Japan, J. Volcanol. Geotherm. Res., 97, 329–346, 2000.

    Article  Google Scholar 

  • Ossaka, J., T. Ozawa, T. Nomura, T. Ossaka, J. Hirabayashi, A. Takaesu, and T. Hayashi, Variation of Chemical compositions in volcanic gases and waters at Kusatsu-Shirane volcano and its activity in 1976, Bull. Volcanol., 43, 207–216, 1980.

    Article  Google Scholar 

  • Ozawa, T., Chemical analysis of volcanic gases: I. Chemical analysis of volcanic gases containing water vapor, hydrogen chloride, sulfur dioxide, hydrogen sulfide, carbon dioxide, etc, Geochem. Int., 5, 939–947, 1968.

    Google Scholar 

  • Ozima, M. and F. A. Podosek, Noble Gas Geochemistry, 286 pp., Cambridge University Press, Cambridge, 2002.

    Google Scholar 

  • Ozima, M. and S. Zashu, Noble gases in submarine pillow volcanic glasses, Earth Planet. Sci. Lett., 62, 24–40, 1983.

    Article  Google Scholar 

  • Sarda, P. and D. Graham, Mid-ocean ridge popping rocks: Implications for degassing at ridge crests, Earth Planet. Sci. Lett., 97, 268–289, 1990.

    Article  Google Scholar 

  • Soya, T, K. Uto, and M. Shimoya, Steam explosion of Kusatsu-Shirane Volcano, October 26, 1982, Chisitu News, 341, 7–16, 1983 (in Japanese).

    Google Scholar 

  • Taylor, B. E., Magmatic volatiles: Isotopic variation of C, H, and S, in Stable Isotopes, edited by J. W. Valley, H. P. J. Taylor, and J. R. O’Neil, Mineralogical Society of America, 185–225, 1986.

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Correspondence to Michiko Ohwada.

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Ohwada, M., Ohba, T., Hirabayashi, Ji. et al. Interaction between magmatic fluid and meteoric water, inferred from 18O/16O and 36Ar/H2O ratios of fumarolic gases at the Kusatsu Shirane volcano, Japan. Earth Planet Sp 55, 105–110 (2003). https://doi.org/10.1186/BF03351737

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Keywords

  • Meteoric Water
  • Steam Explosion
  • Geothermal Area
  • Secondary Vapor
  • Unzen Volcano