Liquid immiscibility

Japanese: 液体不混和 - えきたいふこんわ（英語表記）liquid immiscibility

The separation of a homogeneous liquid into two or more immiscible liquid fractions. The liquid immiscibility observed in melting experiments was not compositionally consistent with that occurring in natural igneous rocks, and it was doubtful whether liquid immiscibility could occur within the compositional range of magmas. Fenner revived the theory and considered immiscibility in magmas to be thermodynamically possible [Greig: 1928, Fenner: 1948, Mason: 1958]. Since Roeder's consideration of immiscibility in 1951 and his active assertion of liquid immiscibility based on experiments with carbonate-silicate systems, petrologists have come to accept it for natural rocks as well [Roedder: 1951, 1979]. Among the various processes of magma differentiation, liquid immiscibility is considered to be the only process by which all-liquid magmas are directly formed. It is sometimes simply called immiscibility.

Source: Asakura Publishing Dictionary of Petrology Information

Japanese:

均質の液体が，二種またはそれ以上の不混和の液体の小部分に分離すること．熔融実験での液体不混和は，組成的に天然の火成岩で起こる組成とはならず，液体不混和がマグマの組成範囲の内部で起こるかどうか疑わしいとされた．フェンナーはこの理論を復活させ，マグマにおける不混和は熱力学的に可能であると考えた［Greig : 1928, Fenner : 1948, Mason : 1958］．1951年にローダーが不混和を考え，炭酸塩─珪酸塩系の実験から積極的に液体不混和を主張して以来，天然の岩石についても岩石学者が認めるようになった［Roedder : 1951, 1979］．多様なマグマの分化作用の過程の中で，液体不混和は全部が液体状態のマグマが直接形成される唯一の過程であるとされている．単に不混和ということもある．

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