Vihywuseh Desmond, Tabod Charles T, Ndikum Eric N, Khan Awa Rostand, Fuen Djam Ann-Marie
Department of Physics, Faculty of Science, The University of Bamenda, Bamenda, Cameroon.
Department of Physics, Higher Teacher Training College (HTTC) Bambili, The University of Bamenda, Bamenda, Cameroon.
Sci Rep. 2025 Sep 26;15(1):33296. doi: 10.1038/s41598-025-08077-0.
This study made use of aeromagnetic data analysis to identify potential geological structures in the magnetic field and map subsurface geological structure, which could serve as potential resources in the Centre Region of Cameroon. The satellite aeromagnetic dataset used was acquired from the Earth Magnetic Anomaly Grid 2 (EMAG2). The application of Reduction to Magnetic Equator (RTE) filter was to remove asymmetries in the data and position the peaks of magnetic anomalies directly over their sources. Low magnetic zones indicated by blue colours from the total magnetic fields possibly reveal the sedimentary intrusions into the area, moderate magnetic regions having green, yellow and red colourations suggest metamorphic rocks and the Northeastern portion of the maps indicated with pink colours correlate to the basement rocks in the study area. Derivative filters and Euler deconvolution technique were applied as enhancement techniques to accentuate the inferred linear subsurface structures interpreted as contacts, fractures, lineaments, as well as their depths using a structural index of N = 0. These structures served as predicted mineral entrapments or contact/fault lines whose NE-SW orientation conforms to the Pan African Orogeny with depths of around 2.0 km.
本研究利用航磁数据分析来识别磁场中的潜在地质结构并绘制地下地质结构地图，这些结构可能成为喀麦隆中部地区的潜在资源。所使用的卫星航磁数据集来自地球磁异常网格2（EMAG2）。应用化到磁赤道（RTE）滤波器是为了消除数据中的不对称性，并将磁异常峰值直接定位在其源上方。总磁场中蓝色表示的低磁区可能揭示了该区域的沉积侵入体，绿色、黄色和红色表示的中等磁区表明存在变质岩，地图东北部粉色区域与研究区域的基底岩石相关。应用导数滤波器和欧拉反褶积技术作为增强技术，以突出推断的线性地下结构，这些结构被解释为接触带、断裂、线性构造及其深度，使用结构指数N = 0。这些结构被视为预测的矿物圈闭或接触/断层线，其东北 - 西南走向与泛非造山运动一致，深度约为2.0千米。
