山西堡子湾金矿床地质特征及成因

The geological characteristics and origin of Puziwan gold deposit of Shanxi Province

堡子湾金矿位于华北地台北缘、内蒙地轴天镇断拱的阳高凸起之上的阳高山前破碎带金、多金属成矿远景带上。矿床产出于堡子湾二长花岗斑岩、石英斑岩角砾岩体中 ,矿体主要赋存于角砾岩体内部及其与围岩的接触带 ,其产状与角砾岩筒产状一致。矿床地质、地球化学特征研究表明其成矿作用与岩浆活动、隐爆和次生富集作用密切相关 。

Puziwan gold deposit is situated in gold containg multimetal mineralizing prospective belt of Yanggao front crushing zone on the Yanggao prostrusion of Tianzhen breaking dome of Inner Mongolian earth axis in the fringe of north China platform .The ore deposit occurred in monzonitic granite porphyry and quartz porphyry of Puziwan. The orebody mainly occurred within the breccia mass and its contact zone with country rock. The occurrence state of the orebody is consistent with that of breccia chimney. It shows from studies of ore deposit geology and geochemistry that the mineralization is closely related to magmatic activity, concealed explosion and secondary concentration . The ore deposit belongs to hydrothermal deposit in medium low temperature which is related to the action of secondary concealed explosion.