江西永平铜矿外围护架山钻孔ZK725岩矿相学特征及意义

内容提要：护架山地区位于江西省铅山县境内永平主矿东部，近年来地质找矿获得重大突破，新增333+334类Cu资源量近30万吨。本文以护架山地区钻孔ZK725为主要研究对象，进行样品采集、室内岩相学与矿相学和电镜能谱的研究，并结合野外地质调查，确定钻孔ZK725孔深766.0m以上的浅部和以下的深部矿化为两种不同成因，上部矿化体现为岩浆热液-构造叠加成矿，下部矿化段显示为永平主体矿区向东的延伸。在石英脉型矿石中发现锌锑黝铜矿，其代表着热液成矿作用的迹象，糜棱岩化岩浆岩的大量分布反映了区域内构造对矿的控制；大量胶状黄铁矿则表明曾经发生过大规模的热水沉积作用，与永平主体矿区同为一个成矿体系。新发现锌锑黝铜矿、含铼白钨矿、含铼钨铁矿、沥青铀矿、方钍石、叶碲铋矿、重硫铋铜矿、碲银矿、碲铋银矿等。 有用金属元素除铜、锌、铅、镉、钨外，本文确定铋与铟的含量也达到最低工业品位的要求。

Facieology and mineragraphy characteristics of Drilling ZK725 in Hu Jiashan on Yongping copper deposit peripheral areas, Jiangxi and their significance

Abstract:Hu Jiashan area is located in eastern of Yongping deposit in Yanshan County, Jiangxi province, which is new major breakthrough of geological prospecting in last years and increased about 300,000 tons Cu resource of 333+334 type. Taking the Hu Jiashan drilling ZK725 as the main research object, we found two kinds of mineraliation genesis in shallow part where above 766.0m depth in drilling ZK725 and deep part under 766.0m based on collected samples, indoor petrologic and mineralogical determination, SEM and EDS analysis. The shallow part is magmatic hydrothermal-structure mineralization and the deep part is the eastern extension of Yongping deposit. (Zn, Sb) Tetrahedrite in quartz vein type ores represented the signs of hydrothermal mineralization, mylonite magmatite reflected structure mineralization. The presence of a large number of colloidal pyrite means that there had been large-scale hot water sedimentary and the same mineralization system as Yongping deposit. We also have found (Zn, Sb)Tetrahedrite, Re-scheelite, Re-ferberite, uraninite, thorianite, pilsenite, hammarite, hessite, volynskite. In addition to copper, zinc, lead, cadmium and tungsten, we made sure the concentration of bismuth and indium up to the lowest level for exploration.