中国火山岩地区金的成矿环境及分布规律  

GEOLOGICAL SETTING AND TEMPORAL SPATIAL DISTRIBUTION OF GOLD DEPOSITS IN VOLCANIC TERRAINS OF CHINA

作　　者：王碧香[1,2] 杨岳清 史仁灯[1,2] 银剑钊 石森 

机构地区：[1]中国地质科学院地质研究所矿床地质研究所 [2]地质矿产部地质调查局

出　　处：《矿床地质》1997年第1期11-20,共10页Mineral Deposits

基　　金：国家"八五"重点黄金科技攻关项目

摘　　要：中国是一个火山岩广泛分布的国家，火山岩区的金矿不论其数量和储量在全国均占有重要地位。根据金和火山活动的关系，可划分出６种金矿类型，它们主要分布在６个火山岩区中。不同地区金的成矿作用各有其特色，总体可概括出７条成矿特征。Volcanic rocks of various ages and their intrusive equivalents are widespread in China,with the existence of a great variety of rock associations. The distribution of various types of gold deposits is generally associated with the features of volcanic rock associations,i.e.,a particular type of gold deposit is related to a specific rock association. Large and supergiant gold deposits have been found in volcanic terrains. Through an intensive study of six genetic types of gold geposits in volcanic terrains,the authors have come to the conclusion that the principal metallogenic epoch of gold deposits in volcanic terrains of China is Mesozoic. Meso zoic gold deposits account for 61.3% of the total gold deposits in volcanic terrains and contribute 73% of the reserves. Late Paleozoic gold deposits are next in number and reserves. In terms of geographic distribution,Mesozoic gold deposits are dominant in eastern China(in volcanic terrains with metamorphosed basement),while Paleozoic ones predominate in western China.The most important gold deposits in China's volcanic terrains are of epithermal type. In comparison with the other five types,this type accounts for 47% of the total number and 44.3% of the total reserves. On the basis of the relations of the distribution of gold deposits to rock associations and structures in volcanic terrains,the authors advance the viewpoint of multifactor mineralization,i.e.,gold deposits are formed by circulation of hydrothermal fluids together with auriferous substances at the intersection of two sets of faults(or terranes).

关 键 词：火山岩 金矿床 成矿环境 分布规律 

分 类 号：P618.510.5[天文地球—矿床学] P618.510.6[天文地球—地质学]