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THE Zijinshan-Bitian Cu-Au-Mo orefield is spread to north of the Shanghang County, SW Fujian.In geological structure it is located at the plunging end of NE-trending Xuanhe anticlinorium, in the NE rim ofthe NW trending Shanghang volcano-sedimentary basin. Orefield basement is composed of the Archean-Middle Proterozoic low-grade metamorphic rock formations, containing marine basic metavolcanic sequenses. Lower Cretaceous subaerial volcanic rocks of andesite-trachy andesite-rhyolite composition fill inthe volcano-sedimentary basin. Pre-mineralization granitic batholith dated 145Ma(Rb-Sr)and 157Ma(U-Pb) occupies the axial part of the plunging anticlinorium, which was regarded as crust-remelting typegranitoids. Mineralization-affiliated subvolcanic dacite porphyrite, co-volcanic granodiorite and quartzdiorite porphyrite (102.2 Ma(Rb-Sr), Sr_1 = 0.708 9) belong to syntactic type in genesis and puncture
THE Zijinshan-Bitian Cu-Au-Mo orefield is spread to north of the Shanghang County, SW Fujian.In geological structure it is located at the plunging end of NE-trending Xuanhe anticlinorium, in the NE rim of the NW trending Shanghang volcano-sedimentary Orefield basement is composed of the Archean-Middle Proterozoic low-grade metamorphic rock formations, containing marine basic metavolcanic sequences. Lower Cretaceous subaerial volcanic rocks of andesite-trachy andesite-rhyolite composition fill inthe volcano-sedimentary basin. Pre-mineralization granitic batholith dated 145Ma (Rb-Sr) and 157Ma (U-Pb) occupies the axial part of the plunging anticlinorium, which was regarded as crust-remelting type granitoids. Mineralization-affiliated subvolcanic dacite porphyrite, co-volcanic granodiorite and quartz diorite porphyrite (102.2 Ma Rb-Sr), Sr_1 = 0.708 9) belong to syntactic type in genesis and puncture