| Core rilling | Level | Crossed old vein | Macroscopic description of the facies |
| IRBC16 | 19 to 23 m |
| Superior hanging wall (ROOF) Quartzite with quartz vein and chlorite |
GOLD STRUCTURE Smoky white quartz with traces of arsenopyrite, pyrite and presence of very fine visible gold | |||
Lower hanging wall (WALL) Quartzite rich in white quartz lodes, with pyrite, arsenopyrite and chalcopyrite filaments | |||
| 36 to 41 m |
| ROOF Mylonitized black metaplite very rich in smoky white quartz lode and veinlets, very rich in arsenopyrite, pyrite and chalcopyrite | |
| GOLD STRUCTURE Smoky white quartz lodes and veinlets with arsenopyrite, pyrite and chalcopyrite, hosted in metapelites | |||
| WALL Black metapelite with pyrite quartz lodes, chalcopyrite and traces of arsenopyrite | |||
| 47 to 50 m |
| ROOF Black metaplite with quartz veinlets, arsenopyrite and rich in pyrite | |
GOLD STRUCTURE Graphitized black metaplite rich in white quartz lodes with arsenopyrite, abundant pyrite and chalcopyrite | |||
| WALL Pelitic meta-sandstone | |||
| IRBC43 | 120 to 123 m |
| ROOF Meta-sandstone with frequent injections of quartz deformed and oxidized with pyrrhotite and pyrite. Presence of chlorite and traces of carbonates |
GOLD STRUCTURE Oxidized and brecciated white gray quartz gray in its cracks, with chlorite, sericite, pyrrhotite, pyrite. Presence of very fine gold difficult to observe | |||
| WALL Crushed and mylonitized meta-sandstone, with quartz injections in places | |||
| 127 to 129 m |
| ROOF Meta-sandstone with frequent injections of deformed white gray quartz,with chlorite, sericite, pyrrhotite, pyrite, carbonate in traces and oxidation of iron in quartz veinlets | |
GOLD STRUCTURE Highly silicified meta-sandstone with gray quartz and carbonates, oxides, sericite, chlorite, abundant arsenopyrite, pyrrhotite and pyrite | |||
| WALL Graphitized black metaplite, with brecciated quartz veins, pyrite, pyrrhotite and arsenopyrite |