甘肃北山公婆泉铜矿一矿区地质特征及找矿标志

Geological characteristics and prospecting criteria of no.1 mining area of gongpoquan copper mine, beishan, gansu

公婆泉铜矿区域上位于极为重要的公婆泉～白山堂铜多金属五级成矿带公婆泉铜矿矿集区内,属于北山斑岩型铜矿成矿带。矿体主要赋存于花岗闪长斑岩、闪长玢岩、英安斑岩等,其中花岗闪长斑岩是最主要的含矿斑岩,矿体多受断裂构造影响。硅化、绢英岩化、黑云母化蚀变、钾化多与成矿相关,具有斑岩型铜矿蚀变分带特征。地表次生氧化带、硅化、绢英岩化、黑云母化、钾化及含矿斑岩体是矿床的直接找矿标志,激电异常、化探异常、磁异常、钾能谱异常是矿床的间接找矿标志。

Gongpoquan Copper Mine is located in Gongpoquan Copper Mineralization Concentration Area of Gongpoquan-Baishantang Copper Polymetallic Grade 5 Metallogenic Belt, which belongs to Beishan Porphyry Copper Mineralization Belt. Ore bodies mainly occur in granodiorite porphyry, diorite porphyry, dacite porphyry and so on. Granodiorite porphyry is the main ore-bearing porphyry, and ore bodies are mostly affected by fracture structures. Silicification, sericitization, biotite alteration and potassium alteration are mostly related to Metallogenesis and have alteration zoning characteristics of porphyry copper deposits. Surface secondary oxidation zone, silicification, sericitization, biotitization, potassium transformation and ore-bearing porphyry are the direct prospecting indicators of the deposit. IP anomaly, geochemical anomaly, magnetic anomaly and potassium spectrum anomaly are indirect prospecting indicators of the deposit.