塞拉利昂区域成矿特征与找矿远景分析

塞拉利昂位于非洲大陆西北部的西非克拉通内,矿产资源丰富。其中具有世界著名的超大型金红石矿矿床、铁矿矿床及钻石矿床;再则在坎戈瑞山已经发现大型金矿,在绿岩带分布区有较多的冲积型砂金矿;另外沿大西洋沿岸局部地段形成质量较好的红土型铝土矿;还有大面积的金刚石砂矿尚未开发。本文根据非洲大陆地质构造纲要演化特点,将该国自北而南划分为5个成矿区带,并系统总结了几个成矿带的区域成矿特征,分析了其找矿潜力。最终认为"坎比亚-森贝洪"、"苏拉山-坎尕瑞山"、"尼密尼山-卡布衣山"三个区带是前景较好的找矿区。

Regional metallogenic characteristics and ore potential analysis of Sierra Leone

Sierra Leone, located at west Africa craton, is abundant in mineral resources. There are the famous super rutile ore deposits, iron ore deposits and diamond deposits in the world; large goldmine in Kange Rui Shan and more Alluvial gold sand in the greenstone belt distribution area; High purity lateritic bauxite along the Atlantic coast and large untapped diamond placer. The country is divided into five metallogenic belt from north to south in the paper based on the African continent tectonic evolution Platform Features. This paper systematically summarized the regional metallogenic characteristics of Sierra Leone, and analyzed its prospecting potential. Finally, three areas, Kambia-Sembehun, Sula-Kangari Mountains, and Nimini-Kambui Mountains were proposed, which have great ore potential.