Hydrothermal AlterationMapping inIjio, Oyo State, Nigeria Using Satellite Imagery & Remote Sensing Technique

International Journal of Geoinformatics and Geological Science

© 2015 by SSRG - IJGGS Journal

Volume 2 Issue 1

Year of Publication : 2015

Authors : Sadiya T.B, Halilu A.S, Asmah T.F., Agu N.V., Nsofor C.J., Sanusi M., Aliyu I., Ibrahim I.

10.14445/23939206/IJGGS-V2I1P101

How to Cite?

Sadiya T.B, Halilu A.S, Asmah T.F., Agu N.V., Nsofor C.J., Sanusi M., Aliyu I., Ibrahim I., "Hydrothermal AlterationMapping inIjio, Oyo State, Nigeria Using Satellite Imagery & Remote Sensing Technique," SSRG International Journal of Geoinformatics and Geological Science, vol. 2,  no. 1, pp. 1-8, 2015. Crossref, https://doi.org/10.14445/23939206/IJGGS-V2I1P101

Abstract:

Landsat ETM+ imagery were used in the analysis and identification of zones of hydrothermal mineralization in and around Ijio town, Oyo state, Nigeria. Three transformation methods were applied for mineral detection i.e. false colour composite, band ratioing and Crosta Technique. False colour composite of bands 4:7:2 was applied on ETM+ to delineate a generalized location of hydrothermal alteration zones in purple hues. Then band rationing technique was applied in order to obtain a more specific location of mineralized areas by spectral signatures of iron oxide, hydroxyl and clay minerals in the alteration zones. Alteration map was produced based on the band ratio techniques produced from Sabin’s band ratio colour

Keywords:

Crosta technique, Band Ratio, alteration zone, Oyo state, mineral deposit, Nigeria.

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