Structural analysis using aeromagnetic data over parts of southern Bida (Nupe) basin, Nigeria and the surrounding basement rocks was carried out to highlight linear structures and infer the effects of such features on the tectonic events in the survey area. The basin consists of the basal Lokoja Formation, overlain by the Patti Formation and capped by the Agbaja Formation. The basal Lokoja Formation is a sequence of matrix supported conglomerates and sandstones overlying the Pre-Cambrian to lower Palaeozoic basement. Magnetic rocks (iron ore) occur at the central, north eastern and south southern sections of the study area. Trend characteristics of magnetic lineaments were highlighted using the Euler deconvolution method. Werner and Euler deconvolution of aeromagnetic data profiles were utilized to determine the depth to magnetic sources. Depth to magnetic sources along aeromagnetic data profiles ranges from 0.01 km to 0.51 km with an average value of 0.128 km. Deductions made from the research are; mineralization is structurally controlled in parts of the survey area with kaolin occurring along a lineament around Share, western part of the survey area. The occurrence of subsurface linear structures may be due to discontinuities caused by faulting of country rock. Lineaments' trends inferred include the east-west, north-south, northeast-southwest, north northeast-south southwest and northwest-southeast directions, with the north northeast-south southwest trend being dominant. Werner deconvolution plots for profiles ZZ and HH located at the central and southern sections of the survey area respectively; are inferred to be basement rock fractures beneath the sedimentary rock.

Trend analysis using aeromagnetic data was carried out over parts of the southern Bida basin, Nigeria and the surrounding basement rocks. Qualitative analysis of the total magnetic intensity map was carried out. Magnetic lineaments were inferred using the Euler deconvolution and analytic signal techniques. Deductions made from the study are; the Romanche fracture zone passed through the study area and the prominent trends of lineaments are the northsouth, northeast-southwest and northwest-southeast directions.

Aeromagnetic and aeroradiometric data covering parts of southern Bida basin, Nigeria and the surrounding basement rocks were processed and interpreted. The research covered both basin and basement rock sections, and was aimed at determining the geothermal heat flow and radioactive heat characteristics of the survey area. The number of data points used for analysis were 2,937, obtained from the digitization of eleven ½ degrees by ½ degrees contour maps. Data processing methods used in the study include determination of heat from radiometric data, regional-residual separation of the total magnetic intensity data, determination of depth-to-top and depth-to-bottom of magnetic sources and estimation of field scaling exponent using the Fractal technique. The research results gave geothermal heat flow values ranging from 69.167 mWm -2 to 124.821 mWm -2 with an average value of 90.959 mWm -2 and radioactive heat values ranging from 0.91 to 4.53 µW/m 3 with an average value of 2.28 µW/m 3 . Deductions made from the survey are, the field scaling exponent varies linearly with depth of downward continuation and Katakwa is a prospect area for geothermal heat.