鲁西铜石地区镁质碳酸盐岩微细浸染型金矿成矿地质特征  

GEOLOGY OF MICRO-DISSEMINATED MAGNESIUM CARBONATE ROCK TYPE GOLD DEPOSIT IN THE TONGSHI AREA,WESTERN SHANDONG

作　　者：于学峰[1] 韩作振[1] 

机构地区：[1]山东科技大学

出　　处：《地质与勘探》2008年第4期39-44,共6页Geology and Exploration

摘　　要：镁质碳酸盐岩微细浸染型金矿是鲁西地区继归来庄隐爆角砾岩型金矿以后,发现的又一新类型金矿。该类金矿赋存于早寒武世朱砂洞组白云岩和白云质灰岩等镁质碳酸盐岩中。矿体产出层位稳定,矿石类型简单,矿化较连续,找矿前景广阔。矿床形成与中生代燕山早期中偏碱性潜火山杂岩密切相关,表现为"二长斑岩-断裂裂隙-镁质碳酸盐岩"三位一体的控矿机制。该类金矿最早在平邑县磨坊沟被发现和评价,因此,笔者将其称为"磨坊沟式"金矿。Micro - disseminated type magnesium carbonate rock gold deposit in the western Shandong is a newly found gold deposit type after founding of crypto -explosive breccias type Guilaizhuang gold deposit. This type gold deposit occurs in magnesium carbonate rock, such as dolomitite and dolomific limestone in early Cambrian Zhushadong formation. Layer orebodies are stable occurrence with simple types. Mineralization is continuous with good ore ex- ploration future. Ore formation are closely related with medium -alkali cryptovolcanic complex in the early Mesozoic Yanshanian. It is shown that ore - controUing mechanism is combination of monzonitic porphyry, fault and magnesium carbonate rock. This type gold deposit was first found and evaluated at Mofanggou, Thus, it is called “Mofanggou type gold deposit”.

关 键 词：微细浸柒型金矿 镁质碳酸盐岩 成矿特征 鲁西铜石 

分 类 号：P618.51[天文地球—矿床学]