广东五华白石嶂钼矿区矿床地质特征

Geological characteristics of molybdenum mineralized area in Baishizhang,Wuhua County,Guangdong Province

白石嶂钼矿区归属于环太平洋钼成矿带华南褶皱系钨-铜-钼成矿省,成矿于中生代燕山期。矿床赋存于燕山二期细粒二云母花岗岩株南东端西侧与上三叠-下侏罗统地层的接触带,白石嶂断裂(F19)与杨塘断裂的交汇部位。本文从区域地质背景入手,着重研究了地层、构造、岩浆岩与成矿的关系;并对矿床的成矿专属性作了初步探讨。文章对围岩及其蚀变特征与矿体/矿石赋存特征、矿体规模之间的关系作了较深入的分析;并在分析成矿物质来源、总结矿化富集规律的基础上,结合粤东地区钼矿成矿特征,总结出本区控矿地质条件与成矿规律,为粤东地区该类矿床的寻找提供理论上的参考。

Baishizhang molybdenum mineralized area,distributed mainly within wolfram-copper-molybdenum metallogenic province in the South China folding system of the circum-Pacific molybdenum metallogenic belt,is the product of magmatism during the Yanshanian of Mesozoic.The molybdenum deposit is occurred at the intersection part of Baishizhang fracture（F19）with Yangtang fracture and in the contact zone at west side of southeast tip of a two-mica granite stock formed in the second period of the Yanshanian magmatism.Starting from regional geological background,this paper mainly studies the relationship of strata,tectonics and magmatic rocks with mineralization,in addition,some preliminary approach to the metallogenic specialization of the deposit was carried out.The relationship of wall rocks and their alteration features with occurrence features and scales of ore bodies/ores is analyzed.On the basis of analyzing the ore-forming material source of deposit and summarizing mineralization enrichment regularity and in combination with molybdenum mineralization characteristics in eastern Guangdong,a theoretical reference for ore-prospecting of this kind of deposits in eastern Guangdong province is provided by summing up metallogenic regularity and ore-control geological setting of the area.