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Fig. 18

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Textural features, shown in SEM-BSE (a, b, c, d) and reflected light thin sections (e, f) images of second ore trend minerals at Tabakoto. (a) Gold particles along deformation cracks in arsenopyrite in metadacite. (b) Gold particles along deformation cracks in pyrite in meta-andesite. (c) Gold particles along deformation cracks in arsenopyrite in metadacite. (d) Free gold grains within the gangue close to arsenopyrite and chlorite in metadacite. (e) and (f) Progressive replacement of pyrrhotite by arsenopyrite in metadacite. Abbreviation: Ab: albite; Ank: ankerite; Kfs: K-feldspar; Apy: arsenopyrite; Au: gold; Chl: chlorite; Ms: muscovite; Po: pyrrhotite; Py: pyrite; Qz: quartz.

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