GEOLOGICAL CHARACTERISTICS AND PROSPECTING INDICATORS OF THE HONGDA-LIJIAPUZI GOLD DEPOSIT IN LIAONING PROVINCE

The Hongda-Lijiapuzi gold deposit, occurring in the altered fracture zones in the early Archean migmatitic granite in Qingyuan, Liaoning province, belongs to post-magmatic epi-mesothermal type. The deposit is hosted in the secondary structures of NE-trending faults, with wall rock of Archean migmatitic granite. The wallrock alteration is a suit of epimesothermal alteration assemblage, including mainly silicification, kaolinization, chloritization, sericitization and calcitization. The formation of ore bodies is related to the multiple pulsating invasions of Archean migmatitic granite and Indosinian granite, especially closely with the latter. Study on the geological characteristics, ore-controlling factors and prospecting indicators shows that the fault structures, Archean migmatitic granite and Indosinian granite should be the main controlling factors for this deposit. The structural features, supergene oxidation and alterations can be used as prospecting indicators in the studied area and peripheral district.