The host rock of the Mengku iron deposit is mainly the amphibole-oligoclase-gneiss formed by the progressive regional metamorphism, and locally is the fractural migmatite.

• 蒙库铁矿床的赋矿围岩主要为前进区域变质作用产生的角闪更长片麻岩，局部可见断裂混合岩化现象。