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首页> 外文期刊>Earth, planets and space: EPS >Formation process of recent fumarolic gases at the Mt. Mihara summit peak of the Izu-Oshima volcano, Japan
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Formation process of recent fumarolic gases at the Mt. Mihara summit peak of the Izu-Oshima volcano, Japan

机译：新山富马酸的形成过程。日本伊豆大岛火山的三原峰顶峰

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摘要

We have investigated the chemical and isotopic composition of recently formed gases emitted by three fumaroles on the Mt. Mihara summit peak of the Izu-Oshima volcano in order to assess the formation process of these gases. The CO2/H2O ratio of these gases varied greatly, with the δD and δ18O of the H2O being as low as a vapor phase equilibrated with the local meteoric water. These features are explained by a mixing of the vapor equilibrated with local meteoric groundwater and primary steam, which is a vapor phase generated by the mixing of magmatic gas and a cold meteoric groundwater. We concluded that there was no direct mixing between the magmatic vapor and a vapor phase of meteoric origin in the processes involved in fumarolic gas formation.
机译：我们研究了山上三个富马mar排放的最近形成的气体的化学和同位素组成。伊豆大岛火山的三原峰顶，以评估这些气体的形成过程。这些气体的CO 2 / H 2 O比变化很大，H 2 <的δD和δ 18 O / SUB低至与局部陨石水平衡的气相低。这些特征可以通过用局部陨石地下水平衡的蒸汽和一次蒸汽的混合来解释，该蒸汽是岩浆气体和冷陨石地下水混合产生的蒸汽相。我们得出的结论是，在与富马酸气体形成有关的过程中，岩浆蒸气与陨石起源的蒸气相之间没有直接混合。

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