Abstract:

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This study investigates radioactive mineralization through a detailed analysis of aeromagnetic and aero-radiometric data in Ganjuwa area, Bauchi State, Northeastern Nigeria. According to sheet-129, the study area is between latitudes 10°30'N and 11°00'N and longitudes 10°00'E and 10°30'E. Magnetic data analysis, including regional-residual separation and reduction to the equator, revealed a diverse magnetic landscape with intensities ranging from -201.97nT to 360.07nT. Structural enhancement techniques, such as analytic signal, First Vertical Derivative (FVD), Horizontal Gradient Magnitude (HGM), and Tilt Derivative (TDR), identified northeast-southwest (NE-SW) trending linear features. Euler deconvolution provided depth estimates between 122.47m and 1102.75m. High levels of potassium (K), equivalent thorium (eTh), and equivalent uranium (eU) were found in airborne radiometric data; these values ranged from 0.04% to 6.67% for K, 7.6 ppm to 124 ppm for eTh, and 2.07 ppm to 14.38 ppm for eU. These levels, though above global averages, remain within safe limits, suggesting localized zones of mineralization. The 𝐾 𝑓𝑇ℎ⁄ ratio map highlighted significant hydrothermal activity in the southern and southwestern regions. Areas of potassium mineralization are located between latitudes 10°30'N to 10°47'N and longitudes 10°03'E to 10°22'E, with depths from 250m to 800m. Thorium and uranium mineralization zones are located between latitudes 10°30'N to 10°43'N and longitudes 10°00'E to 10°18'E, with depths from 130m to 750m. Hydrothermal alteration zones are between latitudes 10°32'N to 11°00'N and longitudes 10°04'E to 10°24'E, with depths from 250m to 800m. These findings highlight potential targets for further exploration and resource development, particularly for potassium, uranium, thorium, and valuable ores like gold, silver, and copper.

Keyward(s): Aeromagnetic Data, Composite, Dip, Euler, Inclination, Lineament, Radiometric Data, Source Parameter Imaging, Ternary

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