几内亚金迪亚地区红土型铝土矿遥感矿化信息与找矿预测

Mineralized Information and Metallogenetic Prospect of Remote Sensing for the Lateritic Bauxite in Kindia of Guinea

位于几内亚西部的金迪亚地区铝土矿资源十分丰富,本文应用ETM、SPOT卫星多光谱数据,采用信息增强、三维显示及地质分析方法,建立了该区已知红土型铝土矿的波谱及影像标志。运用遥感-地貌学方法研究了侵蚀地形与矿化关系,指出了铝土矿的空间展布规律,提出了20个遥感找矿预测区。在成矿条件良好的某一地区进一步筛选出的遥感找矿靶区中工程见矿率达60%。

Kindia is located at the western of Guinea where is abundant in lateritic resources.Based on data of ETM and SPOT,multi-spectrum information enhancement of remote sensing 、the three-dimensional display and means of geological analyses,this paper established the signs of spectrum and image of the lateritic bauxite orebody in this area.Applying of remote sensing and geomorphology,studied the relationship between erosion terrain and mineralization,then the authors pointed out 20 prospect-areas of remote sensing methods.In one of the areas further sieved out a target area,in which ore-conversion probability of project reached 60%.