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Weathering and alteration experiments of volcanic ash and pumice in an oxidative environment

Oxidative hydrothermal alteration experiments were carried out on volcanic ash and pumice to represent initial weathering process on terrestrial surface. Oxidative condition is controlled by MnO2-Mn2O3 buffer in pressure vessels. Hydrous smectite occur in the run product from the volcanic ash on 200C, 120days. Volcanic ash may be more vulnerable than pumice in low pH conditions.

[Chairperson]<br />Noriyoshi Tsuchiya: S2-01 - S2-14

日本鉱物科学会年会

2021 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)

2021 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)

[S2-02]Weathering and alteration experiments of volcanic ash and pumice in an oxidative environment

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