岩浆不混溶分异过程动力学分析

根据实验和具体实例，从岩浆不混溶分异过程分析了不混溶球体相随粒经大小而发展演化的阶段性。在早期，数十微米级以下细小的不混溶球体相互相碰撞合并作用剧烈，生长迅速，正因为如此，以及岩浆结晶作用影响，这种球体相一般难以保存下来。另一极端情况是不混溶相生长到米级以上粒径的球体相时，由于快速的重力分离作用，也难以呈球状保存下来，而形成较大规模的分异层状体。只有毫米级到厘米级的不混溶球体相，由于发展缓慢，容易保存，以致可以在火成岩中看到这种球颗（粒）结构。有时微米级球体可以在淬冷火山岩基质中得以保存。从力学角度看，岩浆不混溶相的发展过程是一种有效的岩浆分异演化机理。

Dynamic Analysis of Immiscible Differentiation Process of Magma

This article, based on dynamics of immiscible differentiation process of magma, analyzes the development stages of immiscible spherical phases. In the early stage when the tiny spherical phases are smaller than micron scale, they collide and merge violently, therefore,they develop rapidly and are difficult to be preserved. Meanwhile they will be reformed or destroyed by crystallization.Under the other extreme condition, the big spherical phases above meter scale are also difficult to be preserved as spheres because of fast gravitional separating, but they provide conditions for forming large scale geological body. Only millimeter to centimeter scale spherical phases, which develop relatively slowly, can be easily preserved. Micron scale spheres may be preserved in quenched volcanic matrix. According to dynamics,the differentiation process of immiscible in magma would be one of effective magmatic evolution differentiation mechanisms.