南川大佛岩铝土矿区钛、硫含量与铝土矿成矿的关系

通过南川大佛岩铝土矿矿床特征的分析及对铝土矿体中Al_2O_3与Ti、S含量关系的研究发现,铝土矿体中TiO_2与Al_2O_3含量成正相关关系。在含矿岩系中若无连续成片的TiO_2含量大于2. 0%的地段,说明原生沉积阶段红土化程度低,初始铝土矿形成条件差,难以形成铝土矿工业矿体,TiO_2含量可作为初始铝土矿含矿岩系质量(红土化程度)优劣的指示元素。铝土矿中硫含量的高低,受后期改造影响明显,可以将S作为铝土矿区后生改造程度强弱的指示元素。

Relation between Ti, S Content and Bauxite Mineralization in Dafoyan Bauxite Mining Area, Nanchuan

By analyzing the characteristics of bauxite deposits in Dafoyan, Nanchuan, and studying the relationship between Al2O3, TiO₂ and S content in bauxite bodies, it is found that there is a positive correlation between TiO₂ and Al2O3 contents in bauxite bodies. If the content of TiO₂ is more than 2.0% in the ore-bearing rock series, it indicates that the lateritization is low in the primary sedimentary stage, and the formation conditions of the bauxite are poor, which can be used as an indicator of the degree of lateritization in the early stage. The content of sulfur in bauxite is obviously affected by the later transformation, so S can be regarded as the indicator element of the degree of epigenetic transformation in bauxite mining area.