岡山大学 地球科学研究報告
Published by Okayama University Earth Science Reports Editorial Committee

火山岩とHCIおよびSO2ガスの反応により生成する水溶性物質

赤木 誠司 Graduate School of Natural Science and Technology, Okayama University
山本 雅弘 Department of Earth Sciences, Faculty of Science, Okayama University
抄録
Experiments on the reaction of a volcanic rock, dacite with HCI and /or SO2 gases have been carried out at room temperature to 800℃ for understanding of the condition of the formation of water-soluble materials on volcanic ash. HCI reacted with the dacite mainly at low temperatures (≤200℃), whereas SO2 did at high temperatures (≥400℃). It was also found that CI/SO4 ratios of water-soluble materials were very high at low temperatures, but decreased rapidly with increasing temperature. In the experiments using a mixture of HCI and SO2, the cation composition at 600℃ and 800℃ was revealed to be significantly different from that at lower temperatures, suggesting the change in the reaction process with temperature.
キーワード
Volcanic gas
Volcanic ash
Water-soluble material
CI/SO4 ratio
ISSN
1340-7414
NCID
AN10506284