上一讲我们介绍了有关铁矿物和铁矿石的一些基本知识.下面,打算简单谈一下关于铁元素在地壳中怎样富集成矿和富铁矿床的主要类型.一、铁元素在地壳中怎样富集成矿上一讲中提到,地球和地壳是不断运动和变化着的.地壳中的铁元素也在不断运动和迁移,并在适当条件下富集成矿.铁元素在地壳中的平均含量约为5%,仅次于氧、硅和铝,居于第四位.在金属元素中,铁(还有铝)在地壳中的含量,可以说是“得天独厚”.再加 Previously, we introduced some basic knowledge of iron ore and iron ore. Now, we intend briefly to talk about how iron is enriched in the earth’s crust, the main types of ore-forming and iron-rich deposits. In the last lecture, it was mentioned that the Earth and the crust are constantly moving and changing, and the iron elements in the crust are also constantly moving and migrating, and are enriched for mineralization under appropriate conditions. The average content of about 5%, second only to oxygen, silicon and aluminum, in fourth place in the metal elements, iron (and aluminum) in the crust of the content, can be said to be “blessed.” Plus