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众所周知,鞍山式铁矿赋存在前寒武纪变质岩系地层里。前寒武纪变质铁矿和富铁矿的储量大约都占世界总储量的70％。在我国,这类铁矿也占有很重要的比例。因而,依靠地表工作查明前寒武纪变质岩系的褶皱形迹,从而确定这类沉积或火山沉积变质铁矿体的空间分布规律,是地质工作者的一个重要课题。这对恢复和建立前寒武纪地层层序以及快速扩大已知矿区的储量并进一步指出找矿方向,都有比较重要的意义。
As we all know, Anshan-type iron ore is hosted Precambrian metamorphic rock strata. Precambrian metamorphic iron ore and iron ore rich reserves account for about 70% of the world total reserves. In our country, such iron ore also occupies a very important proportion. Therefore, it is an important issue for geologists to rely on the surface work to ascertain the folds of Precambrian metamorphic rocks and determine the spatial distribution of these deposits or volcanic sedimentary iron ore bodies. This is of great significance to the restoration and establishment of the Precambrian stratigraphic sequence and the rapid expansion of the reserves of known mines and the further exploration of prospecting directions.