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晋北前寒武系变质铁矿主要分布于五台山及吕粱山两山区,即山西台背斜的五台隆起及吕粱凸起中.其他地区,如恒山、云中山虽有零星分布,但不重要.前寒武系地层从中太古界至下元古界,比较齐全,同位素年龄在24～13亿年之间.目前已发现的主要变质铁矿类型是鞍山式条带状磁(赤)铁矿石英岩.它们在区内呈纵向集中分布于五台群、吕梁山群地层中,而以五台群的文溪段、吕梁山群的袁家
The Precambrian metamorphic iron mines in northern Shanxi are mainly distributed in Wutai Mountain and Lvliang Mountain, ie, the Wutai uplift and Luoliang bulge in the Shanxi platform anticline.Other areas such as Hengshan and Yunzhong have sporadic distributions, Not important.Pre-Cambrian strata from the Middle Archean to the Lower Proterozoic, relatively complete, isotope age between 24 to 1.3 billion years.Currently found the main type of metamorphic iron ore is Anshan strip magnetic (red) Iron ore quartzite in the region they were longitudinally concentrated in Wutai Group, Lvliangshan group strata, and Wutai Group of Wenxiu, Lvliangshan group of Yuan