中国金矿床主要工业类型及其分布特征

石英脉型、蚀变碎裂岩型及糜棱岩型目前仍然是我国金矿床的主要类型.金矿床的空间分布上具有丛聚性,在矿床类型及成矿时代方面,东、西部表现出明显差别.东间地区主要为石英脉型、蚀变碎裂岩型、冰长石一绢云母石英脉型、矽卡岩型、铁帽型及红土型等,成矿时代主要为燕山期,铁帽型及红土型主要形成于第四纪;西北部地区主要有蚀变碎裂岩型、冰长石一绢云母石英脉型和石英脉型等,成矿时代主要为海西期;西南部地区主要为微细浸染型、蚀变碎裂岩型、石英脉型及红土型等,成矿时代主要为印支一喜马拉雅期.砂砾层型在各矿化集中区均有不同程度分布,主要为现代地质作用的产物.

THE MAJOR COMMERCIAL TYPES AND DISTRIBUTING CHARCTERS OF GOLD DEPOSITS IN CHINA

The most important types of gold deposits in China are auriferous quartz vein,auriferous altered cataclasite and auriferous nylonite ones.The distribution of gold deposits shows much difference between east and west China in the aspects of types and metallogenetic times.There are auriferous quarta vein,altered cataclasite,mylonite,adular sericite quartz vein,breccia,skarn,gossan and laterite types in the east.where the metallogenetic epoch is mainly Yanshan period,only gossan and laterite types are formed in Quaternary period.In the northwest of China,auriferous altered cataclasite,adular sericite quartz vein and quarta reef types are present,and metallogenetic epoch is mainly Hercynian period.Fine impregnated mineralization,auriferous quartz vein,altered cataclasite and laterite types occur in southwest China,and the metallogenetic epoch is mainly Indosinian Himalayan period.Auriferous sandy gravel type is present in every metallogenic provinces in China.