Geochemical characteristics of Huanxiawa gold deposit,Henan Province

Some geochemical anomalies closely related to gold mineralization distributed in Huanxiangwa gold deposit broadly.Au and relating elements average content increased in geometric progression as following sequence,that is andesite→altered andesite→altered rocks→ mineralized and altered rocks.Combination anomalies of Pb,Ag and Au elements often distributed in accordance with halos of gold orebody,whereas combination anomalies of As,Sb often reflected the characteristics of orebody's front border halos.Along the tendency of the orebody,Au and relating elements would enrich in different sections from shallow part to deep part, and two concentration centres were formed at 1023m elevation and 976m elevation.The ideal axial zoning sequence of elements is as following: As,Sb-Ba elements as front border halos,Au,Ag,Pb,Zn,Cu,Mo elements as orebodies' halos,(Cu,Mo)-(Co,Ni,Bi) as tail section halos of deposit.The study has systematically summarized geochemical characteristics of the Huanxiangwa gold deposit,concluded the geochemical prospecting criteria for structural altered rocks-host gold deposit and set up a geochemical prospecting mode for Huanxiangwa gold deposit.