[Updated on Apr. 18] Integration of CiNii Articles into CiNii Research

Volcanic activity of Kusatsu-Shirane volcano, Gunma, and secular change in water quality of crater lake Yugama

Bibliographic Information

Other Title
  • 群馬県草津白根山火口湖“湯釜”の水質変化と火山活動
  • グンマケン クサツ シラネサン カコウコ ユガマ ノ スイシツ ヘンカ ト
  • Volcanic activity of Kusatsu-Shirane volcano, Gunma, and secular change in water quality of crater lake Yugama [in Japanese with English abstract]

Search this article

Abstract

Geochemical study on Yugama, a crater lake at Kusatsu-Shirane volcano, has been conducted since 1966. Amounts of various cationic species in Yugama water started increasing around 1981, slightly before the phreatic eruptions in 1982-1983, and kept increasing until 1985. In 1986, they turned to decrease and at present restore their former levels before the eruptions. The concentration of sulfate ion showed a secular change similar to those of cationic species, but no such variation was observed for chloride ion even during the 1976 and 1982-1983 eruptions. However, it started increasing in 1989. A high correlation between the concentrations of chloride and hydrogen ions suggests an increasing influx of hydrogen chloride from the deep volcanic systems under the lake. A Cl--SO42- is an excellent monitor of the variation in volcanic activity at Kusatsu-Shirane volcano; all of the three past activities since 1966, i.e., the high-level subsurface activity in 1968, the eruption in 1976 and the eruptions in 1982-1983, showed a reverse secular change with time in the Cl--SO42- plot. This could be attributable to the function of Yugama water as a condenser of volatiles released underground.

Journal

  • Chikyukagaku

    Chikyukagaku 31 (2), 119-128, 1997

    The Geochemical Society of Japan

Citations (10)*help

See more

References(10)*help

See more

Details

  • CRID
    1390001205743243264
  • NII Article ID
    110008679926
    20000417636
  • NII Book ID
    AN00141280
  • DOI
    10.14934/chikyukagaku.31.119
  • ISSN
    21885923
    03864073
  • NDL BIB ID
    4236462
  • Text Lang
    ja
  • Data Source
    • JaLC
    • NDL
    • CiNii Articles
    • Crossref
  • Abstract License Flag
    Disallowed

Report a problem

Back to top