河北承德庞家沟银多金属矿床地质特征及找矿潜力分析

Analysis of the geological characteristics and prospecting potential of silver polymetallic deposits in Chengde Pangjiagou,Hebei Province

庞家沟银多金属矿床位于丰宁—隆化深大断裂带的东段,区域成矿地质条件良好。矿床主要赋存在长城系团山子组白云质灰岩及近东西向断裂破碎带中,属于似层状火山热液矿床,矿体在垂向上具有“上部膨大,下部逐渐尖灭”的变化特征;矿体受后期逆冲断层破坏较为严重,使得矿体被逆冲断层抬升至地浅表,因此,在逆冲断层抬升的长城系团山子组白云质灰岩中寻找相似成因的银多金属矿是有潜力的。

The silver polymetallic deposits of Pangjiagou are located in the eastern section of fengning-Longhua deep fault zone,and the geological conditions of mineralization in the region are good.The deposit mainly exists in the white cloud ash rock and the near east-west fracture fracture zone of the Great Wall system,which belongs to the hydrothermal deposit of the volcano,and the mineral body has the change characteristic of"upper expansion and gradual sharpness of the lower part"in the vertical uplift;The damage of the ore body by the late reverse fault is more serious,so that the ore body is raised to the shallow surface by the reverse fault,therefore,there is potential to find similar causes in the white cloud graystone of the Great Wall group mountain group raised by the reverse break.