河南北岭金矿床地质特征及深部找矿远景

Geological characteristics of the Beiling gold deposit and prospecting targets at the depth,Henan

北岭金矿床属构造蚀变岩型矿床,为河南省金矿的主要类型。该矿床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;其形成是在燕山期断裂构造活动、岩浆活动及热液成矿作用下,成矿物质在有利的构造部位富集而成。金矿化与黄铁矿化、高岭土化、绢云母化、硅化等关系较为密切。在矿区勘探期间,由于受规范及勘探技术的限制,故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。

The Beiling gold deposit is an altered type gold deposit, the main deposit type in the Henan Province. The ore - forming materials are originated from the volcanic rocks of Jidanping formation of Xionger Group, and the overlying meta - ultramafic rocks and meta - basic voleanics of Taihua Group. The gold deposit was formed through the enrichment of the ore - forming materials in the favorable structure by the jointly process of Yanshanian rift structural and magmatic activities, and hydrothermal fluid process. Gold mineralization is closely associated hydrothermal alteration such as pyritization, kaolinite aheration, sericitization and silicification etc.. Based on the forming depth of the hydrothermal fluid, it is predicted that the gold ore bodies extend to the depth, therefore, there is great potential for prospecting gold resources at the depth.