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

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 oth...

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Bibliographic Details
Published inJournal of disaster research Vol. 17; no. 2; pp. 257 - 262
Main Authors Yaguchi, Muga, Ohba, Takeshi, Hirayama, Yasuo, Numanami, Nozomi
Format Journal Article
LanguageEnglish
Published 01.02.2022
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Summary: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 SO 4 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.
ISSN:1881-2473
1883-8030
DOI:10.20965/jdr.2022.p0257