贵州修文县干坝铝土矿地质特征及成因

THE GEOLOGICAL FEATURE AND GENESIS OF GANBA BAUXITE DEPOSIT IN XIUWEN,GUIZHOU

贵州修文县干坝铝土矿区位于黔中铝土矿带,其矿体形态呈似层状,赋存于下石炭统九架炉组(C_(1)j j)中,铝土矿体的规模与铝土矿岩系的厚度成正比,含矿岩系厚度大,则矿体规模大。而含矿岩系的厚度则受古喀斯特侵蚀面起伏状态控制,低洼处厚度大,凸起处厚度薄。该矿床类型属沉积型铝土矿矿床。

Ganba bauxite orefield in Xiuwen,Guizhou is in Central Guizhou bauxite zone.The orebody is stratoid in Lower Carboniferous JiujialuFormation(C_(1)jj).The scale of bauxite deposit is in direct propotion to the thickness of bauxite rock series,which is controlled by the erosion state of karst,ie thick in the concave;thin on the convex.It is a sedimentary bauxite deposit.