ABSTRACT
The pre-mountain potash belt in Hadamengou Gold Deposit, Inner Mongolia, is located in the south of the ore belt and the north of the pre-mountain Baotou-Hohhot fault. The study of element geochemistry shows that the Piedmont potash belt belongs to the ultrapotassic basalt series. The rocks are characterized by enrichment of LILE (Rb, Ba, K, Sr) and light rare earth elements (LREE), and have obvious negative anomalies of Ti, Ga, and Be, the total rare earth (REE) has the opposite trend with the alteration intensity of potassium. The results show that the rocks of the Piedmont potash belt are structurally fractured and strongly altered, so it is considered that the Piedmont potash belt was originally a tectonically fractured zone, in the later period, the ore-bearing hydrothermal solution with high content of potassium entered the fracture zone and the rocks in the fracture zone underwent hydrothermal alteration.
