Layered mafic intrusions not only represent natural laboratories for studying processes of magmatic differentiation and assimilation within the crust , but also contain extensive precious and base metal mineralization 层状镁铁质岩体不仅是研究岩浆分异演化过程和地壳混染作用的最佳天然实验室,其中还广泛赋存重要的稀有金属和贱金属矿床。
There are two stages to crux maifan stone ' s formation , the first stage is the forming stage of primary material , that is to say , the stage of mother rock formation , in this stage , the latter hypabyssal intrusive of crystallization fractionation and self - metamorphic process are an important factor to make sure them have many trace elements 麦饭石的形成中有两个阶段是十分关键的,第一个阶段是基本物质的形成阶段,即母岩的形成阶段。在这一阶段中岩浆分异结晶晚期的浅成侵入以及自变质作用,是保证其富含营养微量元素的重要条件。