冀北金矿的地质特征及找矿方向

冀北金矿按其成因类型可划分为层控热液型、热液型、火山型和外生金矿。近东西向深大断裂控制了金矿的空间展布。太古宇迁西群和单塔子群角闪质岩石是金矿的重要矿源层。区域变质作用对金活化、迁移及富集具有决定性作用。海西期超镁铁质及偏碱性侵入杂岩和燕山期火山－侵入岩是金最终富集成矿的重要条件。尚义－赤城－平泉大断裂以南的太古宙表壳岩及其断裂两侧的岩浆岩带是进一步找矿的重点区。中生代火山盆地周边是寻找金矿的新区

GEOLOGIC FEATURES AND PROSPECTING GUIDELINES FOR GOLD DEPOSITS IN NORTHERN HEBEI

According to the genetic types,gold deposits in northern Hebei can be divided into four types:Shydrothermal, hydrothermal,volcanic and exogenetic gold deposits.Nearly WEtrending deep fault controlled the spatial extension of gold deposit .Hornblendites of Archaeozoic Qianxi and Dantazi groups are important source beds .Regional metamorphism plays a decisive role in the activation,migration and enrichment of gold Hercynian ultramafie and subalkalic instrusive complex and Yanshanian volcanicinstrusive rocks are important conditions in which gold will be finally enriched to be ore deposit .Archaeoic surficial rocks in the south of ShangyiChicheng Pingquan major fault and its bilateral magmatic rock zone are favoriable for further prospecting gold .The periphery of Mesozoic volcanic basin is a new area for prospecting gold deposit.