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霍丘县西部地层暂定为下元古界的霍丘群,在地表全无露头,被不同厚度的震旦系、寒武系、第三系和第四系覆盖。它由低—中级变质的大理岩、片岩、角闪岩、片麻岩和混合岩组成,并受到多期变形和混合岩化作用的影响。铁矿层分布于大理岩和片岩中,呈似层状、层状、透镜状产出,并因褶皱作用而变形,构成大型矿床。含铁岩系的重磁异常等值线长达20余公里,呈向西微微凸出的南北向狭窄带状(图1)。
The western Huoqiu County is tentatively hosted by the Huoqiu heron in the Lower Proterozoic, with no outcrop on the surface and covered by Sinian, Cambrian, Tertiary and Quaternary systems with different thicknesses. It consists of low-intermediate metamorphic marble, schist, amphibolite, gneiss and mixed rock composition, and by the multi-stage deformation and the role of mixed rocks. The iron ore deposits are distributed in marble and schist. They are layered, layered and lenticular. They are deformed by the folds to form a large deposit. The gravity and magnetic anomaly contours of iron-bearing rock series are more than 20 km long and show a slightly north-south narrow strip protruding westwards (Figure 1).