Geological characteristics and prospecting direction of Jixing lead-zinc deposit,Inner Mongolia
The Jixing lead-zinc deposit in Inner Mongolia is located in the Haobugao polymetallic ore concentration area of the Huanggang-Ganzhuermiao metallogenic belt in the central and southern part of the Greater Khingan Mountains.The metallogenic geological conditions are superior and it is a concentrated distribution area of copper-silver-lead-zinc polymetallic deposits.Based on the geological characteristics,ore body and mineraliza-tion alteration characteristics of the mining area,this paper summarizes its prospecting criteria,compares the typi-cal deposits in the area,determines the genetic types of the deposits,and puts forward the prospecting direction.The results show that the Jixing lead-zinc deposit occurs in the skarn zone between the silty slate and marble of the Dashizhai Formation,and the NE-trending interlayer fracture is an important ore-bearing structure.The ore bodies are mostly veined and lenticular,mainly developing granular structure and massive structure.The wall rock altera-tion is mainly skarnization and carbonation.The direct prospecting mark is marble of Dashizhai Formation.Combined with the regional metallogenic characteristics and the study of typical deposits in the area,it is shown that the Jixing lead-zinc deposit is a contact metasomatic-hydrothermal skarn lead-zinc polymetallic deposit,and it is pointed out that the southwest marble extension zone of the Jixing lead-zinc deposit is the next prospecting direc-tion.
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