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小秦岭高山河地区金矿受太古界太华群变质基底与中元古界蓟县系高山河组碎屑岩盖层之间的区域不整合面及其叠加断裂构造控制。矿床形成于中低温中浅成环境,成矿流体作为低盐度低密度,成分以Na+、K+、Cl-、Ca2+为主,金矿形成于中性-弱碱性还原条件。热液上升到浅部,由于温度压力和二氧化碳逸度降低,并与围岩交代反应促使金在不整合面附近的断裂中充填成矿。
The gold deposits in the Gaoshanhe area of the Xiaoqinling Mountains are controlled by the regional unconformity and its superimposed fault structure between the metamorphic Taihe Group metamorphic basement and the Mesozoic Jixian Member of the Gaoshanhe Formation clastic caprocks. The ore deposit is formed in medium to low temperature and epicenvironment. The ore-forming fluid is characterized by low salinity and low density with Na +, K +, Cl- and Ca2 + as the main constituents. The gold deposit is formed under neutral-weak alkaline conditions. As the hydrothermal solution rises to shallow depth, due to the decrease of temperature and pressure and the fugacity of carbon dioxide, the reaction with the surrounding rock encourages gold to fill in the mineralization in the fault near the unconformity.