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文章论述了挥发性组分在岩浆熔体中的溶解行为及其在岩浆熔体中溶解的限制条件，在此基础上讨论了挥发性组分对岩浆演化及岩石学成因方面的意义：溶解在岩浆中的水可明显地改变矿物从岩浆中结晶出的顺序，改变岩浆熔体的演化轨迹。含水玄武岩浆在其早期结晶出铁的氧化物并与Ｓｉ和富碱质组分分异从而使其成为Ｆｅ亏损的钙－碱性系列的岩浆，而无水玄武岩浆演化的早期不能结晶出磁铁矿，因而演化成富Ｆｅ且具中等Ｓｉ含量的拉斑玄武岩系列。溶解于岩浆中Ｈ２Ｏ的离解将产生高ｆＯ２环境，从而导致Ｆｅ的氧化物在岩浆演化早期沉淀。
In this paper, the dissolution behavior of volatile components in magma melt and its dissolution conditions in magma melt are discussed. On the basis of this, the significance of volatile components in the evolution of magma and the genesis of petrology is discussed: The water in the magma can obviously change the order of the minerals crystallized from the magma and change the evolution trajectory of the magma melt. Aqueous basaltic magmas crystallize in the early stages of iron oxides and are differentiated from Si and alkali-rich components to make them Fe-depleted calcium-alkaline series of magmas, whereas in the early stages of anhydrous basaltic magmas evolution can not crystallize out of magnetism Iron ore, and thus evolved into Fe-rich and moderate Si content tholei basalt series. The dissociation of H2O dissolved in the magma will produce a high fO2 environment, resulting in the precipitation of Fe oxides early in the magmatic evolution.