层位相当的沉积矿床随着不同地区沉积环境的改变,所沉积的矿石类型也不一样,有些地区甚至变为普通的岩石。这种现象我们称为矿床相变。合矿围岩也常产生相应的变化,即岩相变化。掌握这种变化规律,对沉积矿床的找矿勘探,是有指导意义的。 Sedimentary ore deposits of different bedding types vary with sedimentary environment in different areas, and the types of ores deposited are also different. Some areas even become ordinary rocks. This phenomenon we call the deposit phase change. Colliery rocks also often produce the corresponding changes, namely changes in facies. Grasping this change rule is of instructive significance for prospecting exploration of sedimentary deposits.