This work is aimed at interpreting the Aeromagnetic data over Malumfashi area of Northwestern, Nigeria to delineate structures responsible for emplacing mineral deposits in the area. The Aeromagnetic data was interpreted qualitatively and quantitatively using Oasis montaj version 6.4. First vertical derivative, Analytical signal, Source Parameter Imaging (SPI), Potent dyke analysis and Euler deconvolution interpretation techniques were applied in the study. Analytic signal map revealed The qualitative interpretation applied helps enhance linear features at the expense of deep intrusive bodies like lineaments and fault zones which trend Northeast Southwest (NE- SW) in the study area and also indicated distinct pattern of magnetic signatures independent of magnetization direction with amplitude ranging from 0.01 – 0.30 nT/m. The upward continuation performed at 2 Km sharpened clearly the edges of the anomalies of geological interest. Depth obtained by SPI ranged from 161.142 to 576.339 m, this gives approximate depth to source of magnetic signatures in the area. Deep-seated and shallow bodies are observed in the Western and Eastern parts respectively of the area. The depth obtained for the potent dyke analysis is approximately 1000 m with susceptibility value of 0.0100 SI signifying Marble. The relative strike angle of the Dyke Model is (-56.2 degrees), this depth value for potent Dyke analysis agrees considerably with the depth values obtained for Euler deconvolution having a depth range of 149.2 to 1155.5 m. Conclusively, it is suspected that those linear features trending northeast southwest in the area are the potential structures for the emplacement of mineral deposits such as marble.