在我国东北辽东半岛西部中段鞍山一带,在各种片岩、花岗岩、斜长角闪岩等里面,产生不少合磁铁矿和石英的岩石(图1)。由于是夹在变质岩系里面,所以就把它叫作“变质铁矿”;又由于磁铁矿和石英,都各成薄层互相重叠,于是又把它叫作“缟状铁矿或条带铁矿”。根据地质情况和岩石性质,又认为跟世界上前寒武纪含石英的磁铁(赤铁)矿床(Itabirite) In the middle part of western Liaodong Peninsula in northeastern China, there are many rocks that enclose magnetite and quartz in various schist, granite and amphibolite rocks (Fig. 1). Because it is caught in the metamorphic rock inside, so it is called “metamorphic iron ore”; and because the magnetite and quartz, all overlap each other in thin layers, so it is called “iron ore or strip Iron ore. ” Depending on the geological conditions and the nature of the rock, it is believed that the Itabirite deposit, which contains the Precambrian quartz-bearing magnetite,