广东大旗山钨锡矿床地质特征及控矿因素

Geological Characteristics and Ore-controlling Factors of The Daqishan Tungsten-tin Deposit,Guangdong Province

广东大旗山钨锡多金属矿赋存于侏罗系下统金鸡组下段地层内,属传统石英脉型钨锡矿。依据矿体形态、矿体产状等不同,分为断裂破碎带大脉型、断裂破碎带层状型和石英细脉型三种矿体。这三种矿体的空间分布具分带性,以东北角岩体为中心,自南西向北东依次为断裂破碎带大脉型→断裂破碎带层状型→石英细脉型。矿体受构造控制明显,北东向断裂是该区锡多金属矿控矿和容矿构造。

The Daqishan tungsten-tin polymetallic deposit in Guangdong Province is a traditional quartz vein type tungsten-tin deposit,which located in the lower strata of the Jinji Formation of the Lower Jurassic.According to the ore body shape and occurrence,the ore body can be divided into three types:large vein type of fault fracture zone,layered type of fault fracture zone and quartz vein type.The spatial distribution of these three ore bodies is zonal,with the northeast corner rock as the center,and from south-west to north-east,the order is:large vein type→layered type→quartz vein type.The orebody is obviously controlled by structure,and the NE-trending faults are the ore-controlling and host structures of tin polymetallic deposits in this area.