Laiwu hydrothermal metasomatic iron deposit is located at contact zone of Ordovician carbonate rock(Majiagou Formation) and Late Yanshanian diorite or nearby.

• 莱芜接触交代-热液铁矿赋存于奥陶系马家沟组碳酸盐岩与燕山晚期闪长岩的接触带及其附近。