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Comprehensive Geological Survey of Madagascar: Enhanced Tectonic and Geochemical Mapping

This report presents the results of an extensive geological survey in Madagascar, featuring strengthened fieldwork observations and tectonic measurements. Key analyses include 120 zircon mineral ages, 15 K/Ar ages, 500 chemical analyses of whole rocks, and 2,500 new thin sections. The project also involved 500 microprobe analyses and extensive study of 28,000 stream sediments. The renewed geological map is available at 1:500,000 scale, along with updated structural and geochemical maps. Additional thematic maps derived from satellite imagery enhance our understanding of the region’s hydrogeology, metamorphism, and tectonic domains.

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Comprehensive Geological Survey of Madagascar: Enhanced Tectonic and Geochemical Mapping

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  1. Regarding geological survey Geological fieldworks observations and tectonic measurements are strenghtened by - 120 ages by zircon mineral analysis • 15 ages by K/Ar method • 500 whole rocks chemical analysis • 1,300 whole rocks analysis for multi – elements assay • 2,500 new thin sections added to thin sections generated by former programs also studied • 500 mineral microprobe analysis • 28.000 stream sediments and panned heavy minerals

  2. The legend of the renewed geological map is better shaped than former

  3. Sample of renewed geological map at 1:500,000 scale

  4. Sample of renewed structural geology map at 1:100,000

  5. Sample of new geochemical Map at 1:200,000 scale

  6. Legend of geochemical Map for Mn element

  7. Are also available • Hydrogeology • Geomorphology, • Metamorphism • Distribution of ages Other thematic maps on Satellite imageries • JERS radar images • ASTER images

  8. Map of the Tectono-Metamorphic Domains of Madagascar (PGRM, 2008)

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