地壳演化的早期阶段在全球范围内具有相同的表现形式,在有些情况下,在前寒武纪早期存在着一系列外克拉通凹陷构造,具有不同年龄的,含有一定地球化学专属性和含矿的地质建造特征,具有一定的含矿世代(含矿期)。这些含矿世代可分为:含有矿化科马提岩的太古宙表壳岩的绿岩带(阿比提比、巴伯顿、卡尔古利);含有金-铀砾岩的下元古的坳陷(莱德、瑞科比纳、纳拉加因)及覆盖它们的含铁石英岩的盆地(哈 The early stages of the crustal evolution have the same manifestations worldwide, and in some cases there were a series of outer cratonic sags in the early Precambrian, with different age, geochemistry-specific and ore-bearing Of the geological construction features, with a certain ore-bearing generation (ore-bearing period). These ore-bearing generations can be divided into: greenstone belts (Abitibi, Barberton, Kalgoorlie) with Archean crustal rocks containing mineralized komatiites; (Ryder, Rkobina, Nalagain) and the basins that contain them