Mineral Feature of Bauxite Mine in Sanhe Town of Jingxi County and Its Analysis of Genesis Mechanism

The mineral feature and its genesis mechanism of diaspore and gibbsite in Sanhe mine of Jingxi County are studied with observation of polished thin section,X-ray diffraction in the paper.The analysis shows that the bauxite ores are composed of the aluminium、clay、iron、titanium and quartz,and the occurrence of those mineral is particle or aggregate in the orebody.The diaspore and gibbsite are the major mineral.The diaspore exists in the ore of sedimentary and accumulation bauxite.The gibbsite exists in the laterite soil of accumulation bauxite bed.It shows that gibbsite in the area is formed from matrices containing alumina through laterization weathering under hypergene conditions and diaspore is mainly formed from degenerated and dewatered gibbsite.