Integration of geophysics and remote sensing techniques in mapping zones mineralised with disseminated gold and sulphide minerals in Lolgorien, Narok County, Kenya

  • Sammy O Ombiro Pan African University, Life and Earth Sciences Institute, University of Ibadan, Ibadan, Nigeria.
  • Akinade S Olatunji Department of Geology, University of Ibadan, Ibadan, Nigeria.
  • Eliud M Mathu Department Geology and Meteorology, South Eastern Kenya University, Kitui, Kenya
  • Taiwo R Ajayi Department of Geology, University of Ibadan, Ibadan Nigeria
Keywords: hydrothermal alteration, chargeability, resistivity, band ratio, lineament density

Abstract

Even though ground geophysical surveys (especially Induced polarization and resistivity) are applied in mineral exploration, their effectiveness in identification of mineralised zones is often enhanced by integrating other mineral exploration techniques such as remote sensing and geological investigations. Integrating different techniques helps in reducing uncertainty that is often associated with mineral exploration. The methods being integrated also depend on characteristics of mineralisation and those of host rock. In this study, geophysical survey methods (induced polarization and resistivity) were integrated with remote sensing and geological methods to delineate mineralised zones in Lolgorien beyond reasonable doubt. By integrating these methods, it was found that Lolgorien’s gold and sulphide minerals (disseminated minerals) are hosted in massive quartz veins and auriferous quartz veins hosted in Banded Iron Formations. It was also found that this mineralisation was controlled by faults which mainly trend in two directions (NW-SE) and (NE-SW).

Keywords: hydrothermal alteration, chargeability, resistivity, band ratio, lineament density

Author Biography

Sammy O Ombiro, Pan African University, Life and Earth Sciences Institute, University of Ibadan, Ibadan, Nigeria.

Even though ground geophysical surveys (especially Induced polarization and resistivity) are applied in mineral exploration, their effectiveness in identification of mineralised zones is often enhanced by integrating other mineral exploration techniques such as remote sensing and geological investigations. Integrating different techniques helps in reducing uncertainty that is often associated with mineral exploration. The methods being integrated also depend on characteristics of mineralisation and those of host rock. In this study, geophysical survey methods (induced polarization and resistivity) were integrated with remote sensing and geological methods to delineate mineralised zones in Lolgorien beyond reasonable doubt. By integrating these methods, it was found that Lolgorien’s gold and sulphide minerals (disseminated minerals) are hosted in massive quartz veins and auriferous quartz veins hosted in Banded Iron Formations. It was also found that this mineralisation was controlled by faults which mainly trend in two directions (NW-SE) and (NE-SW).

Keywords: hydrothermal alteration, chargeability, resistivity, band ratio, lineament density

Published
2021-05-22
Section
Articles

Journal Identifiers


eISSN: 2507-7961
print ISSN: 0856-1761