平果沉积型铝土矿地质特征及其控矿因素研究

Study on Geological Characteristics and Ore-Controlling Factors of Pingguo Sedimentary Bauxite

本文主要研究平果地区上二叠统合山组下段沉积型铝土矿矿床的矿石结构、矿石构造等地质特征及其控矿因素。其中矿体主要为似层状产出,矿物组成主要为一水硬铝石、粘土矿物等,矿石结构主要呈碎屑结构、交代结构、细粒黄铁矿结构和自型–半自型特征,矿石构造有豆状、鲕状、土状或半土状、砂屑状和致密块状特征。含矿岩系主要的控矿因素有构造控矿、基地岩类控矿和古地形对矿体的分布控制。

The geological characteristics and ore-controlling factors of sedimentary bauxite deposit, ore structure and ore structure in lower members of the Upper Permian Unified Heshan Formation in the Pingguo area are studied in this paper. The ore bodies are mainly stratified, and the mineral composition is mainly diaspore and clay minerals, etc. The ore structures are mainly a clastic structure, metasomatic structure, fine pyrite structure and autotype-semi-autotype, and the ore structures are tetragonal, oolitic, earthy or semi-earthy, sand-like and dense massive. The main ore-controlling factors of ore-bearing rock series are structure ore-controlling, base rock ore-controlling and pale topography controlling ore-body distribution.