安徽省大别山南部超高压变质岩带脉石英成矿区带划分及找矿模型构建OACHSSCD

Quartz veins are widely developed in the southern segment of the Dabie Mountains Ultrahigh-pressure(UHP)Metamorphic Belt,Anhui province.The ore is characterized by low impurity content and high purity,making it an ideal raw material for high-purity quartz.However,due to the generally small scale of individual veins,complex geological structures,unclear ore-controlling conditions,and the lack of systematic exploration theories,prospecting efforts in this area have historically yielded limited breakthroughs.This study systematically analyzed the metallogenic conditions and summarized the key ore-forming factors and genetic mechanisms through field investigations and detailed studies of typical deposits.Furthermore,the metallogenic belts of vein quartz were delineated,and the prospecting criteria were synthesized to establish a prospecting and exploration model.The results indicate that vein quartz mineralization in the Dabie Mountains area is closely associated with regional high-pressure metamorphism,multi-stage magmatic intrusion,and secondary tensional fault structures.It also exhibits a genetic linkage with specific stratigraphic units(or lithostratigraphic horizons).The mineralization is characterized by diverse combinations of ore-forming elements,multi-stage superposition,and complex geological processes.This study has delineated 7 vein quartz metallogenic belts and achieved significant prospecting progress in practical applications,thereby providing a theoretical basis for the exploration of high-purity quartz raw materials in the Dabie Mountains area.