河南省渑池县青阳沟煤下铝矿床地质特征及储量分析

青阳沟铝土矿位于豫西铝土矿矿集区内，属渑池县曹窑以西煤下铝土矿。青阳沟铝土矿与小龙庙铝土矿相邻，是小龙庙铝土矿的延伸，矿区内共圈定铝土矿体2个，呈似层状或透镜状分布于石炭系上统本溪组中，属厚度较稳定型矿体，钻孔见矿率在82%以上。目前，估算(332)+(333)类铝土矿资源量546.65万t,矿体平均厚度2.74 m,平均品位Al₂O₃为62.49%、铝硅比4.6,属低铁型、高硫型矿石，矿山开采技术条件简单。铝土矿受地层及断裂控制明显，其中郭家岭断层切穿铝土矿体，对铝土矿体有一定的破坏作用。矿石化学分析，矿石中Al₂O₃与SiO₂、Fe₂O₃、S含量总体上呈负相关性，与铝硅比呈正相关关系，铝硅比值越大，矿石品位越高，可作为明显的找矿标志，为渑池县煤下铝找矿工作提供理论指导依据。

Geological characteristics and reserve analysis of Qingyanggou coal-bearing aluminum deposit in Mianchi County,Henan Province

Qingyanggou Bauxite is located in the bauxite ore concentration area in western Henan, belonging to the bauxite under the coal west of Caoyao, Mianchi County. Qingyanggou Bauxite is adjacent to Xiaolongmiao Bauxite and is the extension of Xiaolongmiao Bauxite. A total of 2 bauxite ore bodies have been delineated in the mining area, which are distributed in the Benxi Formation of the Upper Carboniferous System in a layered or lenticular shape, belonging to a relatively stable thickness ore body, and the ore occurrence rate in the borehole is more than 82%. At present, it is estimated that the resource of (332)+(333) bauxite is 5.4665 million tons, the average thickness of the ore body is 2.74 m, the average grade is Al₂O₃62.49%, A/S 4.6, which belongs to low-iron and high-sulfur ores, and the mining technical conditions are simple. Bauxite is obviously controlled by strata and faults, and the Guojialing fault cuts through the bauxite ore body, which has a certain destructive effect on the bauxite orebody. According to the ore chemical analysis, the content of Al₂O₃ in the ore is negatively correlated with SiO₂, Fe₂O₃ and S, and positively correlated with the ratio of aluminum to silicon (A/S). The higher the A/S value is, the higher the ore grade is, which can be used as an obvious prospecting indicator and provide theoretical guidance for the prospecting work of aluminum under the coal in Mianchi County.