闽北香炉坪银金矿床地质特征及成因探讨

On Discussion of Geologic Characteristics and Genesis of Xiangluping Electrum Deposit in Northern Fujian

香炉坪银金矿是独立银 (金 )矿床 ,达中型规模。该矿床产在上侏罗统南园组火山岩中 ,矿区内已发现两个矿体 ,呈脉状、透镜状 ,受北北东向或近南北向断裂的控制。通过对矿体特征、矿石矿物及矿石组构的分析 ,认为该矿床属中 -低温热液交代、充填型银金矿 ,成矿过程与构造活动密切相关 ,主要成矿物质来源于火山热液及火山期后热液。

The Xiangluping electrum deposit with a medium scale is one of individual silver (gold )deposits in Fujian Province.The deposit exists in the Upper Jurassic volcanic rock. The two ore bodies discovered in the minefield are controlled by the faults of the north-northeast or near north-south trend, with occurrence in veins and lentiform. Based on the analysis results of orebody characters, ore minerals and ore fabric, it is inferred that the deposit belongs to the electrum of` the mesothermal and hypothermal metasomatic and filling type, that the ore-forming process of the deposit has a close relation with the tectonic activities in the surveyed area and that the major mineral substances of the deposit are derived from volcanic hydrothermal solution and post-volcanic hydrothermal fluid.