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Issue No:1 Vol.4 |
January -2011 |
ISSN: 0974-5645 |
| RESEARCH ARTICLES |
Reders.....Save |
| 12. Remote sensing analysis of a dextral discontinuity along Ifewara-Zungeru area, Nigeria, West Africa. F. Kolawole and A. Y. B. Anifowose. , Indian J.Sci.Technol. Vol. , Issue , pp: 46-51. |
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- Abstract
The Ifewara-Zungeru megastructure is an over 550-km long NNE-SSW trending fault stretching from the south just
east of Ijebu Ode, through Ifewara and Okemesi to the southwestern edge of the River Niger around Lafiagi. It
reappears beneath the sediments of the Nupe Basin and extends northeastwards for over 300 km, through Zungeru to
Kalangai. Detailed remote-sensing mapping of the lateral extent of this suspected shear zone using satellite imagery
field mapping ground-truthing survey was carried out. Structural analysis of the fault system was done across the entire
area that was traversed.The results obtained from this investigation revealed that satellite imagery study of a segment
of the megastructure shows a ductile dextral fault zone with a drag towards the NNW direction in Zungeru area. Highlevel
folding of meta-sediments exist within the area with directions almost perpendicular to the general NNE-SSW
trend of the host rocks. This faulting caused a measure of morphostructural reorientation of the mylonites and
enclosing schistose rocks.
- Keywords: Ifewara-Zungeru, remote sensing, field mapping, structural analysis, metasediments.
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