云南武定钛铁砂矿成因及控矿因素分析

Genesis and Ore Control Factors of Wuding Ilmenite Placer in Yunnan

云南武定钛铁砂矿产于含钛铁辉长辉绿玢岩表层、矿体似层状产于辉长辉绿玢岩风化壳及附近地形有利部位。通过对该砂矿地质特征、成因、找矿标志等分析研究认为,钛铁砂矿体的厚度、品位与辉长辉绿玢岩的风化程度有关。基岩形成的风化壳越厚,钛铁砂矿体厚度越大、品位越高,越具有良好的开发利用前景。

The Wuding ilmenite placer in Yunnan is confined to gabbro-allgovite. The placer occurs as stratoid form in the weathering crust of the gabbro-allgovite. This paper has a discussion on geological features, ore genesis and ore criteria of the ilmenite placer. The study indicates that thickness of the orebody and ore grade are in close relation with weathering crust thickness.