JDR Vol.17 No.2 pp. 257-262
doi: 10.20965/jdr.2022.p0257


Volcanic Ash from the June 17, 1962 Eruption of Yakedake Volcano: Stereomicroscopic, XRD, and Water-Soluble Components Analyses

Muga Yaguchi*,†, Takeshi Ohba**, Yasuo Hirayama***, and Nozomi Numanami**

*Department of Volcanology Research, Meteorological Research Institute, Japan Meteorological Agency
1-1 Nagamine, Tsukuba, Ibaraki 305-0052, Japan

Corresponding author

**Department of Chemistry, School of Science, Tokai University, Kanagawa, Japan

***Nagano Local Meteorological Office, Japan Meteorological Agency, Nagano, Japan

August 27, 2021
November 29, 2021
February 1, 2022
Yakedake volcano, volcanic ash, pyrite, gypsum, water-soluble components

We performed stereomicroscopic, X-ray diffraction (XRD), and water-soluble components analyses on volcanic ash discharged from the June 17, 1962 eruption of Yakedake volcano. Ash samples were collected without surface soil and rainfall contamination. Pyrite and gypsum were identified, as well as other previously reported constituent minerals, and 1,250 mg/kg of Cl and 10,800 mg/kg of SO4 as water-soluble components. The presence of hydrothermal alteration minerals and large amounts of water-soluble components indicates that the eruption was a phreatic event that originated in a hydrothermal alteration zone.

Cite this article as:
M. Yaguchi, T. Ohba, Y. Hirayama, and N. Numanami, “Volcanic Ash from the June 17, 1962 Eruption of Yakedake Volcano: Stereomicroscopic, XRD, and Water-Soluble Components Analyses,” J. Disaster Res., Vol.17 No.2, pp. 257-262, 2022.
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Last updated on Jun. 18, 2024