一、前 言湘南位于南岭构造带中段偏北地区，区内地层较齐全，岩浆岩活动频繁，褶皱、断裂发育，矿产十分丰富，大型—特大型内生多金属矿田比较集中，为华南重要的找矿远景区之一。经过近几年的工作，我们发现湘南一些大型、特大型内生多金属矿田，不但具有明显的特殊地质条件，并且在区域重、磁场上也有明显的异常反映，这就引起了我们研究这些大型 I. Foreword Shonan is located in the north of the middle part of the Nanling tectonic belt. The strata in the area are relatively complete with frequent magmatic rocks, folds and fractures. The mineral resources are very rich. The large-large endogeneous polymetallic ore fields are more concentrated and more important in southern China Prospecting area. After several years of work, we have found that some large and extra-large endogenous polymetallic orefields in southern Hunan not only have obvious special geological conditions but also have obvious abnormalities in regional heavy and magnetic fields. This has caused us to study these Large