摘要
同多数金属矿床一样，金矿床的分布在时间上呈规律性的变化，长期的构造演化和构造旋回明显影响金矿床的时间分布。地质演化过程中的３期重要金矿化分别为新太古代（２７００～２６００Ｍａ）绿岩型金矿化、晚古生代（４５０～３４０Ｍａ）后生金矿化和中生代中温金矿化—新生代浅成低温热液型金矿化。中国金矿床最重要的成矿时代为中生代（侏罗—白垩纪），缺乏国外广泛出现的新太古代绿岩型金矿化和新生代金矿化。
Gold deposits temporally show the regular distribution like the most of metallic deposits. The temporal distribution of gold deposits is obviously controlled by long period tectonic cycle and evolution. Three major metallogenetic epochs in the evolution are late Archean (2 700￣2 600 Ma) greenstone, late Palezoic (450￣340 Ma) epigenetic and Mesozoic mesothermal—Cenozoic epithermal types gold mineralization epoch, respectively. The most important metallogenetic epoch is Mesozoic (Jurassic—Cretaceous) gold mineralization, whereas the Archean greenstone and Cenozoic epithermal types gold deposits are minor in China.
出处
《黄金地质》
1998年第4期54-57,共4页
Gold Geology
关键词
金矿床
地质演化
成矿时代
矿化
gold deposit, geological evolution, metallogenetic epoch
