内蒙古自治区胜利煤田锗矿地质及分布规律

Distribution and geological feature of the Coal-Ge deposit of Shengli coalfield in Inner Mongolia of China

介绍了胜利煤-锗矿床的地质背景,以及锗在矿层的分布情况.胜利煤田处于二连盆地东端乌尼特坳陷中,为一宽缓向斜,地层平缓.胜利煤田煤-锗矿床发育于早白垩世断陷盆地内,位于二连盆地群中胜利煤盆的西南一隅,富锗矿层的分布受两侧F1,F2断层影响,呈现南部埋藏浅厚度薄、北部埋藏深厚度大的倾斜状特点;锗品位变化为南、北部较高(>400×10-6),东、西部较低(200×10-6左右)的"鞍"状分布特点,而向盆地中心急剧降低.沿煤层纵向上可以出现多个聚锗高值,个别钻孔煤层下部夹矸锗含量超过工业品位而具有工业价值,而煤层顶、底板锗含量都很低(<10×10-6),不具有工业价值.锗的分布,与成矿古地质、环境变化有关,受沼泽微环境和水动力影响,锗在煤层中的富集出现波动.采用"地质块段法"估算锗煤的资源量,资源量估算面积1.097 5 km2,估算结果锗资源量1 805 t.

Introduced the geologic background of the Coal-Ge, and the distribution of Germanium in the coal seam. The Shengli coalfield is located in the Wunite depression in the west of Erlian basin, and belongs to a wide syncline, and the layer is smooth. This Coal-Ge grew in Early Crataceous fault depression. The distribution of high Germanic layer is controlled by two faults F1, F2, which are on both sides, and the layer is shallow and thin in the south, and is deep and thick in the north. The concentration of Germanium is high in both south and north（ 〉400 × 10 ^-6 ）, and is lower in both east and west（ about 200 × 10^ -6 ）, and likes a saddle. The concentration is declined quickly towards the centre of the basin. On the vertical, there can be several peak vales on the coal column. To few drill holes the concentration on the dirt band of the bottom of the coal column has the industrial value beyond the industrial grade. But on the top layer and backplane trial value. The distribution of Germanium is associated the concentration is very low（ 〈 10 × 10^-6） without induswith the mineralized palaeogeology, the change of palaeoenvironment, and affected by the swamp micro-milieu and hydrodynamic force. These make Germanium concentrated undulatory on the coal seam. Adopting the method of geologic block to estimate the reserves of Germanium, the estimated area is 1. 097 5 km^2, and the reserves of Germanium is about 1 805 t.