Geochemical Characteristics and Origin of the Xiangkuang Lead-Zinc Polymetallic Deposit in Qixia City,Eastern Shandong Province

Xiangkuang lead-zinc polymetallic deposit in Qixia City,is one of the biggest lead-zinc deposits in Shandong Province.Based on the prospecting data and research results resent years,This article synthetically analysed the geology background,ore body and ore characteristics,wallrock alteration characteristics,deposit genesis.And suggest that Xiangkuang lead-zinc polymetallic deposit show a well-defined zonal distribution.Volcanic activity appears from intermediate to intermediate acid to acid evolution process.The results imply the different types of mineralizations were formed in different time and related to different magmatism.Ore body exsits a well-defined vertical zonal distribution from up to down:the lower part is lead-zinc ore body,the middle is copper-sulfur ore body,and the deep is copper-molybdenum ore body.Alteration and altered wallrock is widely distribute in the ore field,which show surface alteration characteristic and zonal distribution.Hydrothermal effect's stage is obvious in ore field.The lead-zinc deposi ore-foming fluid's salinity is very high.The genesis type of this lead-zinc deposit belongs to porphyry type.