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減圧溶融

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A rock with composition CB starts to melt when its temperature is TA and reaches the solidus curve, the temperature below which all the substance is solid. The newly formed liquid phase has an initial composition of CL at TA. As the temperature increases towards TB, the partial melting of the solid phase leads to changes in composition from CB to CS (blue line). As the liquid phase increases, its composition gets closer to the rock’s original composition CB (red line). When the temperature reaches TB, the whole solid phase has melted, characterizing the substance being above the liquidus curve.[5][6]

部分溶融のメカニズムと地球科学的意義

部分溶融マグマ生成減圧溶融フラックス溶融
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アナテクシス地殻岩石の分溶融プロセスと花崗岩の形成

アナテクシス分溶融地殻ミグマタイト
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The asthenosphere shown at a subduction boundary

アセノスフィア（岩流圏）の構造と地球ダイナミクスへの影響

アセノスフィア岩流圏上部マントルリソスフィア
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