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• TITLE: Integrated Geophysical Study to Delineate Mineralised Zones in Southwest Ashanti Belt of Ghana

  AUTHORS: A. Ewusi, E. Adatsi, J. Seidu

  KEYWORDS: Frequency Domain, Electromagnetic Survey, Magnetic Survey, Southwest Ashanti Belt, Ghana

  JOURNAL NAME: Journal of Geoscience and Environment Protection, Vol.6 No.7, July 20, 2018

  ABSTRACT: Ground Frequency Domain Electromagnetic (FDEM) and Magnetic surveys were conducted in Southwest of the Ashanti belt in the Western Region of Ghana. The aim was to delineate potential gold mineralisation zones that may occur within the area. The magnetic data processing steps involved analytic signal, first vertical derivative, upward continuation, CET grid analysis as well as depth to basement model (Werner deconvolution). For the electromagnetic survey using the two coil separations (100 m and 150 m) and the multi frequencies (222 Hz, 888 Hz, 3555 Hz), the data in-phase component was processed to produce EM component maps showing the potential mineralisation zones. Lineament analysis using the rose diagram showed that the area is dominated by N-S and NNW-SSE lineaments. The upward continuation and depth to the magnetic source bodies indicated that the magnetic bodies in the study area can be located at depth less than 200 m.