南角河银多金属矿床的垂直分带特征  

THE VERTICAL DISTRIBUTION CHARACTERISTICS OF THE NANJIAOHE SILVER POLYMETALLIC DEPOSIT

作　　者：施泽明[1] 张成江[1] 倪师军[1] 谭榜平[1] 徐波[1] 郭虎[1] 王平利[1] 

机构地区：[1]成都理工大学应用核技术与自动化工程学院,成都610059

出　　处：《成都理工大学学报（自然科学版）》2003年第5期468-473,共6页Journal of Chengdu University of Technology: Science & Technology Edition

摘　　要：南角河银多金属矿床属于低温热液型硫化物矿床。通过矿物组合、成矿元素组合及流体包裹体温度、盐度、气液比的研究,发现矿床具有明显的垂直分带的地球化学特征:矿物组合自下向上依次为方铅矿-闪锌矿→方铅矿-闪锌矿-黄铜矿-黄铁矿-辉锑矿→辉锑矿;矿体下部成矿元素组合为Pb-Zn-Fe-Cu组合,中部为Pb-Zn-Sb-Au-Ag组合,上部为Sb。由于成矿温度、盐度、气液比的垂直规律性变化及成矿元素的性质和成矿条件的变化,导致了矿物组合和成矿元素组合的垂直分带特征。The Nanjiaohe silver polymetallic deposit belongs to the low temperature sulfide deposit. There are evidences to indicate that it shows a vertical distribution by studying mineral assemblages, oreforming elements combination and the temperature, salinity and gas/liquid ratio of liquid inclusions. From the bottom to top, the minerals assemblages are galenitesphalerite→galenitesphaleritechalcopyritepyriteautimonite→autimonite, respectively. The oreforming association of elements is PbZnFeCu at the bottom, PbZnSbAuAg lies in the middle, and Sb lies on the top. This was maybe caused by the change of temperature, salinity, gas/liquid ratio, the difference of oreforming elements' property or the change of oreforming conditions.

关 键 词：银多金属矿床 垂直分带 流体包裹体 

分 类 号：P618.52[天文地球—矿床学]