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大厂锡矿田位于环太平洋锡矿带的西部,南岭纬向构造带的西端与广西山字型构造前弧西翼的复合部位。矿区内岩浆岩与褶皱、断裂均很发育,矿体主要赋存在中上泥盆统富含碳质的碳酸盐、硅质岩、及礁灰岩中。矿区中部有龙箱盖黑云母花岗岩产出,岩体西侧接触带有夕卡岩锌铜矿床,岩体东侧有钨锑脉状矿分布。锡石—硫化物矿床多集中于岩体400～200米以外的东西两侧(见图1)。水平方向显示近铜锌远锡的矿化分带,垂直方向矿化分带也明显(图2),215队称之为“上锡下铜中间锌”。
The Dachang tin field is located in the western part of the Pacific Rim tin belt and the western part of the Nanling weft tectonic belt and the composite part of the western front part of the Guangxi Shanxi structure. The magmatic rocks, folds and faults in the mining area are well developed. The ore bodies are mainly found in the carbonate rocks rich in carboniferous, silicalite and reef limestone in the middle and upper Devonian. The middle part of the mining area has the Longteigai biotite granite output. The west side of the rock mass is in contact with the skarn Zn-Cu deposit, and the eastern side of the rock mass is provided with tungsten-antimony vein ore distribution. Cassiterite-sulphide deposits are mostly concentrated on both east and west sides of the rock masses (see Fig. 1). The horizontal direction shows the mineralization zoning near copper zinc far tin, vertical mineralization zoning is obvious (Figure 2), 215 teams called “the middle of the copper under the tin”.