广东省德庆县某金矿矿石特征及金赋存状态

Ore Characteristics and Au Occurrence State of a Gold Mine of Deqing County,Guangdong Province

某金矿是位于广东省德庆县境内的一个中型构造蚀变岩型金矿,是继河台大型金矿床之后在广宁—罗定成矿带上的又一重大金矿找矿突破。为研究该矿床矿石特征及金赋存状态,对矿区矿石进行了大量系统采样,并进行了化学多元素分析、矿物组分分析、矿物扫描电镜分析以及岩石矿物显微镜鉴定。研究表明:该矿床金以自然金为主,少量黑铋金矿,微量Jonassonite;矿床中金主要以金铋固熔体、以硫铋络合物为载体的形式随还原性的硅质成矿流体运移,而后叠加于韧性断裂带上的脆性断裂空隙中分离沉淀成矿。

A gold mine in Deqing County in Guangdong Province is a medium-scale tectonic altered rock gold deposit,it is another major gold deposit prospecting breakthrough in Guangning- Luoding met- allogenic belt after Hetai large scale gold deposit is found. In order to study the ore characteristics and Au occurrence state of the deposit, systematic smapling work of the ores in minnig area is conducted and a lot of samples of ores are obtained, chemical multielement analysis, mineral component analysis, mineral scan- ning electron microscopy analysis and mineral microscopic identification or rock mass are done. The study results show that minerals of gold deposit is mainly for native gold, a small amount of black bismuth-gold ore and trace Jonassonite;the gold element in the deposit moves with reduced siliceous metallogenic fluid with the form of gold and bismuth solid solution and takes sulfur-bismuth complex as the canqer,then, the gold element is superimposed on brittle fracture interstices in ductile fault zone to separate sedimentary mineralization.