福建古田西朝钼矿床成矿构造特征及找矿方向

The Metallotectonic Characteristics and the Ore-finding Target of the Xichao Molybdenum Deposit in Gutian County,Fujian Province

福建古田西朝钼矿产于似斑状黑云母二长花岗岩顶托作用所产生的穹窿状滑脱裂隙构造中,贮矿围岩为复式岩体及南园组火山碎屑岩。矿体呈似层状、透镜状,多层重叠,以辉钼矿石英脉、辉钼矿硅化脉带为主,脉带旁有硅化、绢英岩化、钾化、云英岩化等。复式岩体属高硅富钾花岗岩,可以与赤路、三保等钼矿床成矿花岗岩对比。

The Xichao molybdenum deposit in Gutian County, Fujian Province exists in the domeshaped slip fault structures arose by the lockup action of quasi-porphyritic biotite monzonitic granite. The country rocks of storing ores are the complex massif and Nanyuan Formation volcanoclastic rocks. The orebody presents a multilayer overlaying with a parabedded or lenticular shape and gives priority to molybdenite-quartz veins and molybdenite silicification veins. There occur silication, sericite quartzitization, potassization and greisenization near the veins. The complex massif belongs to the high silicon karlsteinite, which can contrast with the ore--forming granites of the Chilu and Sanbao molybdenum deposits.