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Aeromagnetic and remote sensing characterization of structural elements influencing iron ore deposits and other mineralization in Kabba, southwestern Nigeria
Advances in Space Research ( IF 2.8 ) Pub Date : 2021-06-24 , DOI: 10.1016/j.asr.2021.06.024
Ajibola Richard Faruwa , Wei Qian , Akinniyi Akinsunmade , Adedibu Sunny Akingboye , Claire Dusabemariya

Remote sensing and aeromagnetic data analyses were conducted for the characterization of basement structural elements that influence iron ore deposits and other mineralization over kabba and its surroundings. Spectral analysis suggests depth to magnetic sources range from deep, intermediate, and shallow with depths (i.e., 2.8 km, 1.5 km, and 0.3 km respectively). Three lithological zones were revealed on the Analytic Signal (AS) image which includes Meta-Sedimentary Complex, migmatite-gneiss-quartzite complexes, and undifferentiated schist and metavolcanic rocks. Structures interpreted based on first vertical derivatives (FVD), total horizontal derivatives (THD), and AS of the aeromagnetic images enabled delineation of long, deep, regional, inter-terrain linear structural features that are different from shallow, relatively short local intra-terrain structures. Typical potential mineralized zones are regions where the delineated structures on the AS coincide with FVD anomalies vis-a-vis zones exhibiting THD peak anomalies and high magnetic susceptibility. These characterized zones also coincide with the location of known geologically deposits of iron - ore and marble. Mineral deposits tend to be dominated regionally by the dominant structural patterns (NE-SW to ENE-WSW, NW-SE to WNW-ESE, and E-W) delineated from SRTM and aeromagnetic analysis.



中文翻译:

影响尼日利亚西南部卡巴铁矿床和其他成矿结构元素的航空磁学和遥感表征

进行了遥感和航磁数据分析,以表征影响卡巴及其周围铁矿床和其他矿化的基底结构元素。频谱分析表明,磁源的深度范围从深、中和浅(即分别为 2.8 公里、1.5 公里和 0.3 公里)。分析信号(AS)图像显示了三个岩性带,包括变质沉积杂岩、混合岩-片麻岩-石英岩杂岩以及未分化的片岩和变质火山岩。基于航磁图像的一阶垂直导数 (FVD)、总水平导数 (THD) 和 AS 解释的结构能够描绘不同的长、深、区域、地形间线性结构特征From 较浅、相对较短的局部地形内结构。典型的潜在矿化带是 AS 上描绘的结构与 FVD 异常重合的区域,相对于显示 THD 峰值异常和高 磁化率的区域。这些特征区也与已知的铁矿石和大理石地质矿床的位置相吻合。矿床往往在区域上以 SRTM 和航磁分析描绘的主要构造模式(NE-SW 到 ENE-WSW、NW-SE 到 WNW-ESE 和 EW)为主。

更新日期:2021-08-24
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