厂坝-李家沟矿床规模巨大,是秦岭地区西成铅锌成矿带的重要矿床之一。矿体形态和规模明显受沉积洼地控制。矿石常显微莓球状、针状、他形隐晶质、显微球粒结构。可识别的矿石沉积-成矿作用构造有浸染-条带状、条纹-条带状、隐晶质条带、条块状、块状构造等。矿体中下部主要为块状矿石,富黄铁矿、闪锌矿、钠长石和石英;上部为条带状、浸染状和层纹状矿石,富闪锌矿、重晶石和方解石。条带状的石英钠长石岩和重晶石所含的典型喷气元素B和As的含量比正常沉积岩高出几倍到几十倍。闪锌矿中Zn/Cd>>500,黄铁矿中Co/Ni为0.2~0.8。另外,该矿主要形成于受裂谷控制的克拉通内部及其边缘的沉降盆地。结果表明,厂坝矿具有较典型的Sedex型矿床特征。 Dachangba - Lijiagou deposit is a huge deposit, which is one of the important deposits of the Xicheng lead-zinc metallogenic belt in the Qinling area. The morphology and size of the orebody are obviously controlled by the sedimentary depression. Ore often microspherical spherical, acicular, he-shaped cryptocrystalline microspheres structure. Identifiable ore deposits - metallogenic processes are disseminated - ribbons, stripes - ribbons, cryptocrystalline bands, bar-like, massive structure and so on. The lower part of the ore body is mainly massive ore, pyrite, sphalerite, albite and quartz; the upper part of the banded, disseminated and layered ore, zinc blende, barite and calcite. Striped quartz albite and barite contain typical jet elements B and As levels higher than normal sedimentary rock several times to several times. Zn / Cd >> 500 in sphalerite and 0.2 ~ 0.8 in pyrite. In addition, the mine is predominantly formed in settlement basins inside and near the craton controlled by rifts. The results show that the dam has more typical Sedex deposit characteristics.