福建上杭紫金山次火山热液铜金矿床地质特征初探  

DISCUSSION ON GEOLOGICAL CHARACTERISTICS OF SUBVOLCANIC HYDROTHERMAL COPPER-GOLD DEPOSIT IN ZIJINSHAN, SHANGHANG COUNTY, FUJIAN

作　　者：石礼炎 李子林 

机构地区：[1]福建省地质矿产局 [2]闽西地质大队

出　　处：《福建地质》1989年第4期286-299,324-326,共14页Geology of Fujian

摘　　要：紫金山铜金矿床是福建新发现的一个新的矿床类型。矿区主要为—燕山期复式花岗岩体分布,其中燕山晚期的英安玢岩及其相伴的隐爆角砾岩含铜金矿,目前已圈出四个矿化带。矿石矿物以蓝辉铜矿、硫砷铜矿为主。矿化具垂直分带,上部以蓝辉铜矿为主,标高580—400米间以硫砷铜矿为主。400米以下以黄铜矿为主。在潜水面之上及其附近,因铜硫矿物经氧化流失使金相对富集成矿。作者认为。该矿床的形成与燕山晚期次火山热液活动有关。成矿物质主要来源于深部,并提出成矿模式。Zijinshan copper-gold deposit is a new type of ore deposit found in Fujian recently. There distributes Yanshanian multiple granites, of which the later Yanshanian dacite porphyrite and the associating subexplosive briccia contain ores bearing copper and gold which has been delimited four mineralization belts. The ore minerals are dominantly chalcocite and enargite. There are vertical zoning of mineralization, that is chalcocite in the upper, enargite at the elevation between 580 to 400m, and chalcopyrite below the 400m. Upon or near the water table, gold concentrates relatively is due to the oxdation and infiltration of the copper sulphide minerals. It is belived that the formation of this ore deposit is related with subvolcanic hydrothermalism and the ore-forming material came from the deep. The metallogenic model is presented.

关 键 词：铜金矿床 次火山热液 矿床地质 

分 类 号：P618.51[天文地球—矿床学]