含铁建造由各种不同的岩相所组成,而其沉积作用则同特定类型的构造体系有密切关系.尽管这些化学沉积岩石的生成并不限于任何的特定地质时代,然而厚层含铁建造仍以中前寒武纪的为多(克劳德,1973). 称为含铁建造的条带状硅铁沉积因其与(鱼面)绿泥石-菱铁矿-粘土铁岩不同,所以在过去几十年内,成了世界很多研究者的课题,并且对它在整个地质时期内的沉积、层位及构造等方面的研究,都获得了重要进展.而今,含铁建造已被公认为是一群重要的具有特殊成矿意义的化学沉积含铁沉积物,其重要性 The formation of iron is composed of a variety of lithofacies and its sedimentation is closely related to the particular type of structural system. Although the formation of these chemically-deposited rocks is not limited to any particular geologic age, the formation of thick iron Still dominated by the Middle Precambrian (Claude, 1973). Because of its different from the (fish surface) chlorite - siderite - clay rock, Therefore, in the past few decades, it has become a subject of many researchers in the world and significant progress has been made in its research on sedimentation, horizon and structure during the entire geologic period. Nowadays, iron-bearing construction has been recognized It is a group of important chemical deposition iron-bearing sediments with special significance of metallogenesis, and its importance