Xiaertai rock group,a set of metamorphic rock system in Xiaertai area,has experienced strong ductilebrittle deformation and then thermal contact metamorphism and dynamometamorphism in the late stage.

经原岩恢复可将下二台岩群分为三个岩组：盘岭岩组，黄顶子岩组及烧锅屯岩组，其原岩建造分别为火山岩建造、碳酸盐岩建造及碎屑岩建造。

Thus, the boron-bearing rock system and the magnesian rocks are the foundation of the borate deposits, whereas regional metamorphism and migmatitization and tectonism are the necessary conditions.

含硼岩系、镁质容矿岩石是硼矿形成的物质基础，区域变质及混合岩化作用、构造活动是硼矿形成的必要条件。