Characteristic features of metasedimentary units in the Tabakoto deposit. (a) Drill core interval consisting of metagreywacke intersected by multiple hydrothermal V₂ vein events. (b) Drill core interval consisting of meta-argillite showing a folded V₁ veins with sub-vertical V₂ veins. (c) and (d) Photomicrographs of representative metagreywacke in thin section (c, cross-polarized light and d, plane-polarized light). (e) and (f) Representative photograph showing the precipitation of veins in more competent units (dikes) than less competent metasedimentary unit. Abbreviation: Ab: albite; Bt: biotite; Cb: carbonate; Chl: chlorite; Ma: matrix; Mt: metasediments; Qz: quartz; Ser: sericite; Sul: sulfide; V: vein.