Abstract
In this research the lineaments of the Kafanchan area in North-central Nigeria were investigated in order to explore the mineralization zones of the area. Aeromagnetic data over Kafanchan and environs within the Younger Granite Province, in the North-Central Nigeria were collated and analyzed. The aeromagnetic map of the area was interpreted both qualitatively and quantitatively so as to identify the nature of the magnetic sources and the trends direction in the study area. The trend of the Total Magnetic Intensity (TMI) map is predominantly in NE-SW. The First Vertical Derivative (FVD) Lineaments Map was also correlated with LADSAT lineaments map and both maps agreed in most areas. The study area is characterized by predominant magnetic lineament trend in NE-SW direction and subordinate E-W direction. The result also shows that the most significant structural trends affecting the distribution of these magnetic anomalies in the study area is in NE-SW direction. The TMI map indicates that there are three major mineralization zones in the study area. The high magnetization contrast in the NE and SE parts of the study area correlates with the migmatite-gneiss, biotite-granites, granites and basalts which are associated with high magnetic contrasts. Also, the high magnetization contrast in the NW part of the area correlates with basalt and the biotite-granite. However, the predominant low magnetization contrast observed in the western half does not correlate with the basic igneous rock
Highlights
Geophysics, as its name indicates has to do with Physics of the Earth and its surrounding atmosphere
5.0 CONCLUSION The Total Magnetic Intensity (TMI) map produced by Oasis Montaj (Version 7.01) software was used to determine the trend of the anomalies
The magnetic fields have dominant NE – SW with minor E –W directions which conform with the lineament trend directions within the Nigerian basement complex
Summary
Geophysics, as its name indicates has to do with Physics of the Earth and its surrounding atmosphere. The initial work in applying geophysics to the search for minerals probably was taken in 1843, when Von Wrede pointed out that the magnetic theodolite, used by Lamont to measure variations in the Earth’s magnetic field might be employed to discover bodies of magnetic ore. This idea was not acted on until the publication in 1979 of Professor Robert Thalen’s book on the Examination of Iron Ore Deposits by Magnetic Method (Telford et al, 1976). Mapping the patterns of magnetic anomalies attributable to rock magnetism
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