Pneumatolytic deposit

Japanese: pneumatolytic deposit(英語表記)pneumatolyticdeposit
Pneumatolytic deposit

…For this reason, in recent years, the fluids that form mineral deposits have generally come to be called mineralizing fluids. In the past, hot water with a temperature higher than the critical temperature of pure water (about 374°C) was thought to have physical properties similar to gas, and mineral deposits that were thought to have formed from such fluids were called pneumatolytic deposits and distinguished from hydrothermal deposits. However, mineralizing fluids usually contain a considerable amount of dissolved salts, and their critical temperature is much higher than that of pure water. …

*Some of the terminology that refers to "pneumatolytic deposit" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…このため近年では鉱床を生成する流体を一般に鉱化流体とよぶようになった。古くは,純水の臨界温度(約374℃)より高温の熱水は,その物理的性質がガスに近い状態であると考えられ,そのような流体から生成したと思われる鉱床を気成鉱床pneumatolytic depositとよんで熱水鉱床から区別していた。しかし通常の鉱化流体はかなりの塩類を溶解しており,その臨界温度は純水の場合よりかなり高い。…

※「pneumatolytic deposit」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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