河南省嵩县萑香洼金矿矿床地球化学特征

莅香洼金矿发育有与金矿关系密切的地球化学异常，Au及相关元素的平均含量从安山岩→蚀变安山岩→蚀变岩→矿化蚀变岩呈几何级数递增。沿F985构造蚀变带走向，Pb、Ag与Au的组合异常通常与金的矿体晕分布一致，而As、Sb组合则更多反映了矿体前缘晕的组合特点，沿倾向，Au及相关元素自浅而深具有分段富集特征，并在1023m标高和976m标高构成二个浓集中心。其理想的元素轴向分带序列为：前缘晕As、Sb—Ba，矿体晕Au、Ag、Pb、Zn、Cu、Mo，矿尾晕（Cu、Mo）-（Co、Ni、Bi）。文章在前人研究的基础上，系统总结了莅香洼金矿床的地球化学特征，总结了构造蚀变岩型金矿床的地球化学找矿标志，建立了萑香洼金矿床的地球化学找矿模型。

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.