塞拉利昂马邦托地区铁矿地质特征及找矿预测

马邦托地区位于塞拉利昂北方省,苏拉山—坎格瑞丘陵弧形构造带由北北东向北北西的转折部位、新太古代绿岩带内,铁矿、金矿资源丰富,成矿地质条件优越。文章在论述巴伐亚铁矿床地质特征的基础上分析了区域铁矿成矿规律,总结了铁矿控矿因素,建立了区域沉积变质型铁矿成矿模式和预测模型。结合马邦托地区1∶5万航磁异常特征,进行了矿产预测,指明了找矿方向,总结了找矿标志。结果表明:马邦托地区铁矿找矿潜力仍然巨大,Y2异常区为寻找富铁矿的有利地段。

Geological characteristics and prediction of iron deposits in Mabonto area, Sierra Leone

Mabonto area of Sierra Leone is located in the alternating part of Sula mountain to Kangari hills arc tectonic zone which take a turn from NNE into NNW, the gold and iron resources are abundant, the ore-forming geological conditions are superior. Based on the geological characteristics of the Gpafaya iron deposit, the metallogenic regularities of the regional iron deposits are analyzed, the controlling factors of iron deposits are summarized, the metallogenic model and prediction model of sedimentary metamorphic iron deposits in this area are established. Combined with the characteristics of 1:50000 aeromagnetic anomaly, mineral prediction is carried out, and prospecting indicators are summarized. This study results show that the iron ore prospecting in Mabonto is good and Y2 aeromagnetic anomaly area is a favorable area for finding rich ore deposits.