Journal of
Geology and Mining Research

  • Abbreviation: J. Geol. Min. Res.
  • Language: English
  • ISSN: 2006-9766
  • DOI: 10.5897/JGMR
  • Start Year: 2009
  • Published Articles: 169

Full Length Research Paper

Estimation of gold mineralization using remote sensing techniques based on index calculation: Case of Betsiriry region, western Madagascar

Rakotondramano H
  • Rakotondramano H
  • Engineering and Geosciences, University of Antananarivo, Madagascar.
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Razafindrakoto B
  • Razafindrakoto B
  • Polytechnic School of Antananarivo, University of Antananarivo, Madagascar., Institute and Observatory of Geophysics of Antananarivo, Madagascar.
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Randriamiarantsoa T
  • Randriamiarantsoa T
  • Office of National Mines and Strategic Industries, Lalana Razanakombana Antananarivo 101, Madagascar.
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  •  Received: 22 April 2021
  •  Accepted: 14 June 2021
  •  Published: 31 July 2021

Abstract

It is undoubtedly true that the development of a country depends on the exploitation of these resources. In the case of Madagascar’s Island, it is home to countless natural biological and mineral resources. Yet the island is underexplored, with most of the country's geological data dating from the 1950s. The use of modern technologies in mineral exploration and research facilitates and gives us many advantages. The time and investment cost will be less, but the results are reliable depending on the procedures to be followed in the processing, analysis and interpretation of the data acquired. By using ENVI software for ASTER and Landsat8 images, Index  calculation of certain minerals, color composite and band ratio of the different spectral bands are the methods adopted to see the spatial distribution of gold deposits available in the study area located in the Betsiriry region in the western part of Madagascar. Field survey for verification is always recommended after software treatment, data analyses and interpretation.

Key words: Geographic information system (GIS), remote sensing, gold, betsiriry, index calculation.