High resolution airborne magnetic data acquired between 2005 and 2010 were used to determine depth to shallow and deep magnetic sources in some parts of Southeastern Nigeria. Various depth estimation methods such as standard Euler deconvolution (SED), source parameter imaging (SPI), spectral depth analysis (SDA) and two dimensional (2-D) forward modeling were applied. Results obtained from SED, SPI and models of profiles 1 and 2 indicate that the Abakaliki Anticlinorium (AA) and Ikom-Mamfe Rift (IMR) regions are dominated by short wavelength magnetic anomalies caused by extensive tectonic events. The SED map showed depth to shallow and deep magnetic sources ranging from ~ 16.6 to ~ 338.3 m and ~ 394.3 to ~ 5748.1 m respectively. Likewise, depth estimates from the SPI map varies from ~ 147.1 to ~ 554.2 m (shallow magnetic sources) and ~ 644.2 to ~ 6141.6 m (deep magnetic sources). The result obtained from SDA revealed depths to deep magnetic basement in the range of ~ 769 to ~ 6666 m with an average of ~ 3449 m. Also, it showed that depth to shallow magnetic sources vary between ~ 119 and ~ 434 m with mean of ~ 269 m. The 2-D forward modelling showed maximum depth values of ~ 4700, ~4600 and ~ 6500 m in the models of profiles 1, 2 and 3 within the Anambra Basin (AB), Afikpo Syncline (AS) and Calabar Flank (CF) respectively. Generally, from all the various methods applied the results indicate that AB, AS and CF are dominated by long wavelength anomalies. The 2-D models indicated that the basement framework is undulant. Also, depth estimates involving the various methods used in this study correlate strongly with each other in the AB, AS and CF geological regions.

在2005年至2010年之间获取的高分辨率机载磁数据被用于确定尼日利亚东南部某些地区深浅磁源的深度。各种深度估算方法，例如标准的Euler反卷积（SED），源参数成像（SPI），光谱深度分析（SDA）和二维（2-D）正向建模。从SED，SPI以及剖面1和2的模型获得的结果表明，Abakaliki反clinorium（AA）和Ikom-Mamfe Rift（IMR）地区主要是由广泛的构造事件引起的短波长磁异常。SED图显示深度到浅层和深层磁源的范围分别为〜16.6至〜338.3 m和〜394.3至〜5748.1 m。同样，SPI映射的深度估计值从〜147.1至〜554.2 m（浅磁源）和〜644.2至〜6141.6 m（深磁源）不等。从SDA获得的结果表明，深层磁性基底的深度在〜769至〜6666 m的范围内，平均〜3449 m。还，结果表明，浅磁源的深度在〜119和〜434 m之间变化，平均值为〜269 m。在Anambra盆地（AB），Afikpo Syncline（AS）和Calabar Flank（CF）的剖面1、2和3中，二维正演模型显示的最大深度分别为〜4700，〜4600和〜6500 m 。通常，从所有应用的各种方法中，结果表明AB，AS和CF由长波长异常所控制。二维模型表明地下室框架是不可靠的。同样，涉及本研究中使用的各种方法的深度估计在AB，AS和CF地质区域中也具有很强的相关性。Afikpo Syncline（AS）和Calabar Flank（CF）。通常，从所有应用的各种方法中，结果表明AB，AS和CF受长波长异常的支配。二维模型表明地下室框架是不可靠的。同样，涉及本研究中使用的各种方法的深度估计在AB，AS和CF地质区域中也具有很强的相关性。Afikpo Syncline（AS）和Calabar Flank（CF）。通常，从所有应用的各种方法中，结果表明AB，AS和CF受长波长异常的支配。二维模型表明地下室框架是不可靠的。同样，涉及本研究中使用的各种方法的深度估计在AB，AS和CF地质区域中也具有很强的相关性。