分离结晶作用,岩浆冷却时,除硅酸盐矿物外,其他成分还易形成成分广泛变化的固溶体。在此情况下,岩浆中的某些成分较多的析出,形成晶体与岩浆不能保持平衡关系,岩浆就与晶体发生反应。
分离结晶作用(Fractional crystallization): 岩浆随着温度的逐渐降低,按一定顺序先后结晶出不 同矿物,从而使岩浆成分不断地发生变化,分异出不 同成分的岩浆。
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岩相学及岩石化学研究表明,岩浆演化机制是矿物分离结晶作用。
The petrologic and petrochemical study has shown that the main mechanism controlling the magmatic evolution is fractional crystallization of minerals.
但在高位岩浆房中,随着分离结晶作用的进行,岩浆的温度和氧逸度逐渐降低。
However, the temperatures and oxygen fugacity of magmas at high level magma chamber decreased along with fractional crystallization.
采用乳化结晶法,研究了粗蒽精制过程中溶剂、温度、助剂及分离时间的作用。
The effects of solvent, temperature, additive and separation time on the refinement process of crude anthracene by using emulsion-crystallization were reported.
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