广东龙门盆地平陵径石英脉型钨矿地质特征及成矿预测

Geological Characteristics and Metallogenic Prediction of Pinglingjing Quartz Vein Type Tungsten Deposit in Longmen Basin,Guangdong Province

平陵径钨矿区处于佛冈—丰良东西向断裂和北东向河源断裂带在龙门盆地边缘的交接部位,龙门Fe-Pb-Zn-W成矿亚带的中部。通过在矿区开展不同程度的地质调查、分析测试等工作,表明矿区黑钨矿的形成与新丰江岩体上侵关系密切,岩浆岩中成矿流体与小坪组地层接触发生渗透、交代作用,在接触带外带小坪组地层的石英脉中富集成黑钨矿体。开展的地球化学工作圈定了异常浓集中心,验证为黑钨矿化异常,预测在矿区的铅、锌异常浓集中心处以及浅地表至中部具有寻找裂隙充填型铅、锌矿脉的可能,而深部的岩体是寻找石英大脉型钨钼矿的有利部位。

Pinglingjing tungsten deposit is located in the junction of Fogang-Fengliang east-west fault and northeast Heyuan fault zone at the edge of Longmen basin,and the middle of Longmen Fe-Pb-Zn-W metallogenic subzone.Through different degrees of geological survey,analysis and testing in the mining area,it is shown that the formation of wolframite in the mining area is closely related to the intrusion of Xinfengjiang rock mass.The ore-forming fluid in the magmatic rock contacted with the Xiaoping Formation to undergo infiltration and metasomatism,and enriched into wolframite ore bodies in the quartz veins of the Xiaoping Formation in the outer zone of the contact zone.The geochemical work carried out delineated the anomaly concentration center and verified it to be a wolframite mineralization anomaly.It is predicted that there is a possibility of searching for fissure-filled lead and zinc veins in the abnormal concentration center of lead and zinc in the mining area and from the shallow surface to the middle,and the deep rock mass is a favorable part for searching for quartz vein type tungsten molybdenum ore.