河南洛宁范庄金银铅矿床地质特征及找矿前景分析  

Geological Characteristics and Prospecting Potential of the Fanzhuang Gold-Silver-Lead Deposit in Luoning County,Henan Province

作　　者：陈全树 谢从瑞[2] 杨忠智 刘海波 

机构地区：[1]河南省有色金属地质矿产局第六地质大队,河南洛阳471002 [2]西安地质矿产研究所,陕西西安710054 [3]核工业203研究所,陕西咸阳712000

出　　处：《地质与勘探》2012年第6期1087-1092,共6页Geology and Exploration

基　　金：矿产资源补偿项目"熊耳山西段多金属矿及深部成矿预测研究"(2007-262)资助

摘　　要：范庄银、铅矿床位于熊耳山变质核杂岩的北缘,区内拆离断层和北东—北北东的断裂发育,矿床主要是受上述两组断裂控,形成以构造蚀变岩型的银、铅矿。矿体均产于强烈蚀变的北东—北北东的构造蚀变带,或者是与拆离断层交汇处的蚀变带中,呈脉状、透镜状、似层状产出。矿石矿物以方铅矿,闪锌矿、黄铜矿、黄铁矿为主,脉石矿物为石英、绢云母、方解石等,围岩蚀变有硅化、绢云母化、黄铁矿化、绿泥石,强硅化与成矿关系较密切,蚀变的分带现象较为明显,从矿体中心向两侧有逐渐减弱的趋势。从目前已发现的构造蚀变带和矿(化)体已可构成矿床,从构造特征和物化探资料分析,矿区的找矿前景良好,可望能形成有一定规模的矿床。The Fanzhuang gold - silver - lead deposit is located in the northern margin of the Xiongershan metamorphic core complex, where detaching faults and NE - NNE faults developed well. These two sets of the faults exert a key control on the alteration - type Ag - Au ore bodies. The ore bodies mainly occur in the NE - NNE - trending structural alteration zones or that intersects with the detachment faults, with veined, lentoid or layer - like shape. The ore minerals are dominated by galena, sphalerite and pyrite, and the gangue minerals are quartz, sericite and calcite. The wall - rock alteration includes silieification, sericitization, pyritization and chloritization, and the strong silicification is associated with mineralization. The alteration exhibits a zoning characteristic which becomes weak from the zone center to the both sides. The tectonic characteristics and geophysical - geochemical data of the known structural alteration zones indicate that there is a great ore - search potential in this deposit district.

关 键 词：熊耳山变质核杂岩 范庄银铅矿床 控矿因素 拆离断层 构造蚀变岩 

分 类 号：P617[天文地球—矿床学]