FIG. 3. A. Photomicrograph of the primary sedimentary bedding that has been bent around a chalcopyrite (cpy) nodule and is continuous with discordant veins containing chalcopyrite (plane-polarized light, 384/141.50 m). B. Photomicrograph of a set of discordant and concordant chlorite + chalcopyrite veins crosscutting the sedimentary bedding (plane-polarized light, 384/141.20 m). C. Photomicrograph of a mineralized Fe chlorite breccia with a fragment of laminated sedimentary rock from the hanging wall in a chlorite ± magnetite ± chalcopyrite matrix (plane-polarized light, 353/168.70 m). D. Magnetite breccia with abundant chalcopyrite (cpy), crosscut by carbonate veins (BHMAG-003/407.25 m). E. Photomicrograph of the matrix of a magnetite breccia with abundant biotite (bi) showing pleochroic halos due to uraninite inclusions (plane-polarized light, BHMAG-003/407.25 m). F. Photomicrograph of the matrix of a magnetite breccia showing the textural relationship between chalcopyrite (cpy), bornite (bn), and magnetite (mgt; reflected light, BHMAG-001/476.00 m). All drill core is stored by Companhia Vale do Rio Doce at Igarapé Bahia.