ABSTRACT

Ground magnetics and electromagnetic datasets were processed to interpret the subsurface geology and structure of the southwest of Ghana within the Tarkwain and Volcanics in the central part of the Ashanti belt. The study was aimed at mapping lithology, delineating structural lineaments and their trends as well as the trend of mineralization in the study areas. The data processing steps involved enhancement filters such as reduction to the pole, analytical signal, the first horizontal and vertical derivative, reduced to equator and upward continuation all of which helped delineate zones of mineralization and their geological, structures and lithology control within the Ashanti belt.

 The electromagnetic datasets displaying the conductivity information within the study area proved valuable in delineating mineralization and structural trends of both study areas. The upward continuation filter serves as a great tool in delineating deeper source and determining the extent of mineralization. The objective of this work was aimed at delineating the structural and mineralization zones of the sturdy area. Both the magnetic and EM images were instrumental in showing the structural orientation in the study area. The orientation of Asuogya was delineated as NW-SE and that of Nkwanta was found as a N-S. This orientation also indicates zones of mineralization.