論文

査読有り
2019年1月

Sulfur isotopic systematics during the October 2017 eruption of the Shinmoe-dake volcano, Japan

Applied Geochemistry
  • Ikehata, Kei
  • ,
  • Maruoka, Teruyuki

102
開始ページ
102
終了ページ
107
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.apgeochem.2019.01.009
出版者・発行元
PERGAMON-ELSEVIER SCIENCE LTD

Shinmoe-dake, a volcano, in Japan, began to erupt on October 11, 2017, after a 6-year period of quiescence. The pyroclastic materials ejected during October 11-14, 2017, contain sulfur-bearing minerals. Time-series sulfur isotopic compositions of sulfur species in the samples ejected during the 2017 eruption were measured in order to reveal the geochemical characteristics of the volcanic hydrothermal system that developed after the 2011 eruption and its evolution during the 2017 eruption. delta S-34 values for water-leached sulfate (+16.09 parts per thousand to +17.51 parts per thousand), acetone-leached native sulfur ( - 1.23 parts per thousand to +0.42 parts per thousand), fine-grained pyrite (-1.81 parts per thousand to -0.90 parts per thousand), and coarse-grained pyrite (- 3.48 parts per thousand to - 2.57 parts per thousand) remained relatively constant with time. The hydrochloric-acid-leached sulfates of the pyroclastic materials ejected from October 11 to October 12 exhibit a relatively limited range of delta S-34 (+9.87 parts per thousand to + 13.17 parts per thousand). Then, on October 14, the delta S-34 value suddenly increased to +16.85 parts per thousand, which is simi

リンク情報
DOI
https://doi.org/10.1016/j.apgeochem.2019.01.009

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