贵州猫场铝土矿成矿环境分析

Analysis on the Metallogenic Environment of Maochang Bauxite in Guizhou

黔中隆起后的碳酸盐岩及粘土岩类在长期物理、化学作用下,首先形成红粘土;红粘土进一步风化,而后分解成Al、Fe的氧化物、氢氧化物,在溶坑和溶蚀凹地内初步富集成零星分散的致密状和土状喀斯特型铝土矿,因地形改变再度进入分解破碎,为猫场最终铝土矿的形成提供物质来源—铝土矿碎屑。这些铝土矿碎屑和Al、Fe的氧化物、氢氧化物被地表和地下水以不同形式搬运到猫场十溶蚀湖中,按碎屑、化学、生物沉积规律形成猫场古溶蚀湖沉积铝土矿床。

By long time physical and chemical process,the carbonate rock after Central Guizhou uplidft, becomes red clay,after further weathering,the red clay decomposed into the oxide,hydroxide of Al and Fe, in the dissolution hole and depression,it concentrates primary fragmentary tight and earthy karst bauxite ore. Because the variation of landform,it decomposes and cracks again,affords the material source：bauxite fragment for the formation of Maochang bauxite deposit.These bauxite fragment and oxide of Al,Fe are transported in to the Maochang dissolution lakes by underground and surface water in different forms,forms Maochang ancient dissolution sedimentary bauxite deposit as the sedimentary regulation of fragment,chemistry and biology .