山东平邑铜石金矿田成矿系列及成矿模式

铜石金矿田主要由隐爆角砾岩型 (归来庄式 )、碳酸盐岩层状微细浸染型 (磨坊沟式 )、夕卡岩叠加型、斑岩型和蚀变岩型等多种类型的矿床 (点 )组成 ,矿种以金为主 ,伴有银、铜、铁矿化 ,构成一个较完整的成矿亚系列。成矿作用与铜石富钾碱性次火山杂岩关系密切 ,岩浆活动为矿床的形成提供了热液和热源。泰山岩群为主要矿源层 ;寒武纪朱砂洞组上灰岩段之白云质灰岩、灰质白云岩为磨坊沟式金矿的有利含矿层位 ;寒武系上部—奥陶系下部的白云质灰岩、白云岩等是归来庄式金矿的有利围岩。杂岩体构成的次火山穹窿及伴生的环形放射状构造 ,控制着矿体的分布。

Ore-froming Series and Model of Tongshi Gold Field in Pingyi, Shandong Province

Tongshi gold field are mainly composed of cryptoexplosive rock type (Guilaizhuang type), stratified microdisseminated carbonate rock type (Mofanggou type), multiple scarn type, porphyry type and altered rock type deposits (spot); the major mineral is gold, companied with silver, cooper and iron mineralization which formed a completed ore-forming series. Ore-forming has a close relation with Tongshi rich-potash subvolcanic and magmatic movements provided hydrothermal solution and heat source for ore-forming. Taishan group is the main source bed; dolomite limestone in upper limestone section of Cambrian Zhushadong formation and lime-dolomite are good ore-bearing layers of Mofanggou type gold deposit. Dolomite limestone and dolomite in upper part of Cambrian and lower part of Ordovician are good wallrocks of Guilaizhuang gold deposit. Subvolcanic dome formed by complex and companied circle radiated faults controlled distribution of orebodies