贵州修文大豆厂铝土矿矿床地质、矿石特征及成矿因素研究

Study on Geology,Ore Characteristics and Metallogenic Factors of Bauxite Deposit in Guizhou Xiuwen Soybean Plant

贵州修文大豆厂铝土矿为古风化壳沉积型一水硬铝石矿床。古地理环境是区内铝土矿成矿的充分必要条件,寒武系娄山关组与石炭系间古侵蚀间断及相对稳定的大地构造环境有利于铝土矿的形成。古喀斯特地貌是直接控制区内铝土矿保存的重要空间,主要表现为溶坑、溶凹、溶槽和溶蚀盆地控制的分布格局。在野外找矿工作中,含铝岩系石炭系下统九架炉组中上部是区内铝土矿的直接找矿标志,区内各向斜核部、背斜两翼及娄山关组顶部古侵蚀面是区内铝土矿的间接找矿标志。

The soybean factory bauxite deposit in Xiuwen County,Guizhou Province is a sedimentary diaspore deposit with ancient weathering crust.The paleogeographic environment is the Necessity and sufficiency of bauxite mineralization in the area,and the paleoerosion discontinuity and relatively stable tectonic environment between the Cambrian Loushan Pass formation and carboniferous system are favorable to the formation of Bauxite.The ancient karst is an important space for the preservation of bauxite deposits in the area under direct control,mainly showing the distribution pattern controlled by solution pits,solution depressions,solution troughs and solution basins,the middle and upper part of the lower carboniferous Jiujialu formation in the aluminous rock series is the direct prospecting indicator of the bauxite in the area,and the indirect prospecting indicator of the bauxite in the area is the synclinal core,anticlinal two wings and the paleoerosion surface at the top of the Loushan Pass formation.