豫西前河金矿床控矿因素及深部找矿远景分析  

Ore-Control Factors and Prospect of Ore Search toward Depth in the Qianhe Gold Deposit in Western Henan Province

作　　者：郑松森[1] 张云政[1] 瓮纪昌[1,2] 陈雷[2] 巴安民[1] 李振华[1] 殷建峰[1] 

机构地区：[1]河南省地矿局第二地质勘查院,河南许昌461000 [2]河南省地质调查院,河南郑州450007

出　　处：《地质与勘探》2011年第2期204-208,共5页Geology and Exploration

摘　　要：前河金矿床属构造蚀变岩型矿床,为河南省金矿的主要类型,其成矿物质来源于熊耳群鸡蛋坪组火山岩及其下伏太华群变质的超铁镁质岩、变基性火山岩。在燕山期断裂构造活动、岩浆活动及成矿热液作用下,成矿物质在构造的有利部位富集成矿,在构造的转折部位、分支复合部位及构造交汇部位矿体变厚,品位变高。金矿化与硅化、黄铁矿化、黄铁绢英岩化、钾长石化及铅锌矿化等关系较为密切,尤其是细粒黄铁绢英岩化蚀变岩金的品位较高。在矿区勘探期间由于受规范及勘探技术的限制,矿体深部未尖灭,但没有施工深部远景钻孔,对矿体深部延伸特征研究不够。按照热液矿床成矿流体的产生深度,矿体向深部有较大的延伸空间,资源潜力较大,具有较好的找矿前景。对该区深部实施勘查工作,进行矿床远景控制,将会有新的突破。The Qianhe gold deposit is of structural altered-rock type deposits that dominate the gold mines in Henan Province.Its ore-forming materials are originated from the volcanic rocks in Jidanping Formation of the Xiong’er Group and the underlying metamorphic ultra-mafic rocks and metabasic volcanic rocks of the Taihua Group.They were accumulated at favorable sites by the effects of fault activity,magmatism and ore-forming hydrothermal process during the Yanshanian period.The ore body was thickened and its grade became higher at structural transition areas,composite parts of branches and structural intersections.Gold mineralization is related with silication,pyritization,phyllic mineralization,K-feldspar mineralization,and lead mineralization.Especially the grade of the gold in fine pyrite phyllic mineralization altered rock is relatively high.The extension of ore bodies toward depth is not clear during the exploration of mining area due to limitations of the regulations and exploration technology and lack of deep drilling.In theory,according to the depth where ore-forming fluids are produced in hydrothermal deposits,the ore body should have a great extension downward,implying a large resource potential and a good prospect of ore search.It is expected that the exploration toward depth and prospect control of the deposit in this area will lead a new breakthrough.

关 键 词：金矿床 控矿因素 深部找矿 豫西前河 

分 类 号：P619.14[天文地球—矿床学]