个旧西区陡岩锡矿原生晕特征

CHARACTERISTICS OF ORIGINAL HALO AND METALLOGENESIS PROGNOSIS OFDOUYAN SN DEPOSIT IN WEST REGION OF GEJIU

对个旧西区陡岩锡矿原生晕的研究,认为金属矿物组合分带有规律,(从内向外)Cu、Sn带→Sn、Pb、Cu带→Sn、Pb带;金属元素水平分带(从内向外):Cu、Bi→Ag→Sn→Pb、Mn→Cd;垂直分带序列(从下至上):Cu→Zn→Sn→Ag→Pb→Mo→In→Bi→As;可将异常划分为:Sn、Cu型,Sn、Cu、Pb型,Sn、Pb型;通过地表、剖面原生晕特征的分析,提出找矿标志;预测花岗岩的深度及成矿有利地段,指出找矿方向。

According to the study of original halo of Douyan Sn deposit in west region of Gejiu, the zonation of metallic mineral assemblage is Cu - Sn zone→Sn - Pb - Cu zone→Sn - Pb zone （from the inner to the outer）. The horizontal zonation of metallic element （ from the inner to the outer） is Cu - Bi→Ag→Sn→Pb - Mn→Cd ; the perpendicular zonation is Cu→Zn→Sn→Ag→Pb→Mo→In→Bi→As （from the lower to the upper）. The anomaly can be divided into the Sn- Cu type, Sn - Cu - Pb type and Sn - Pb type. Basing upon the analysis of characteristics of original halo in the surface and the section, the ore - prospecting mark, the prognostic depth of granite, the advantageous place of metallogenesis and ore - prospecting direction are proposed in this paper.