Kiena

Kiena Deep A Zone

The Kiena Deep A Zone is localized within the Marbenite Fault deformation corridor. The Kiena Deep A Zone is divided into three main lenses: ZA, ZA1 and ZA2. A fourth smaller lens (H1ZA) is located in the hanging wall of the ZA at the contact between the basalt and the flow breccia units. The lenses occur along an isoclinal fold associated with the MF and a subsidiary fault. All lenses in the Kiena Deep A Zone are variably altered to chlorite, albite, carbonate and amphibole. Pyrite content is less than 2% with traces of pyrrhotite and chalcopyrite. Two styles of gold mineralization occur in the zone; the first style largely dominates Kiena Deep and the second style is seen occasionally: Laminated veins (shear veins) hosted within sheared ultramafic rocks (grade is up to several ounces of gold per ton). Folding is observed in shear zones. Veins are composed of vitreous to milky to grey quartz with carbonates. There is more than one gold bearing vein generation. Sulphides range from traces to 1% locally (pyrite, pyrrhotite, chalcopyrite, sphalerite and galena). Stockworks of quartz-carbonate veins and veinlets hosted in basalt (like the S50 style of gold mineralization) typically yielding less than 10 g/t Au. The 2020 underground development in the ZA at level 111, allowed to observe the geological complexity associated to ZA gold mineralization. A metric deformed corridor containing gold mineralization characterized the ZA. Intense folding of quartz veins is observed within a sheared corridor. An important amphibolization seen to be closely related to the folded laminated veins. It is probable that the protolith of the amphibolitized rock is an ultamafic rock. Mineralization also seems to have taken place during multiple veining events. Although visible gold is frequently seen in deformed quartz veins, it has also been possible to observe visible gold several times with the amphiboles corresponding to the amphibolitized corridor. Despite the geological complexity and the intense deformation observed, the ZA corridor shows good geological continuity over several tens of metres.

The main lenses ZA, ZA1 and ZA2 are coplanar to the MF to the SW, conforms to the fold hinge in the middle part and is sub-vertical to the NE. The axial plan of the isoclinal fold undulates and plunges abruptly to the ESE. Lens ZA is located at the contact of the basalt domain and the chlorite-carbonite schist. We generally observe a feldspar porphyry dyke in the hanging wall of the ZA, which is a guide for the interpretation. This dyke seems to have undergone the same deformation as the host schist. The ZA has a horizontal footprint of 150 m and a vertical extent of 460 m with thicknesses ranging from 3 m to 18 m. ZA1 and ZA2 lenses are sub-parallel to the ZA and are entirely in the chlorite-carbonate schist of the fault along with minor intermediate dykes. ZA1 shows a vertical extent of 550 m and a horizontal footprint of 120 m with thicknesses ranging from 3 m to 8 m. ZA2 is less drilled than ZA and ZA1 and is actually separated in two domains by a low-grade area. The lower part of the ZA2 has a much higher grade than the upper part and is also thicker with thicknesses of up to 15 m in the lower part. The overall vertical extent of the ZA2 is 590 m. The lenses ZA1 and ZA2 still have to be defined on the sub-vertical contact. Definition drilling is ongoing in this area.

Foot Wall Zone

To date, the Footwall Zone is defined by many new intersections of gold mineralization located within a 50 metre (‘m’) wide corridor adjacent to the footwall of A2 Zone. Gold mineralization is associated with quartz ± visible gold veins that are spatially associated with amphibolite altered komatiite and basaltic komatiite units. In some areas, gold mineralization is also observed in deformed basalt and/or flow breccias present within ultramafic units. Similar to the Kiena Deep A Zone, gold mineralization is deformed by subsequent folding, shearing, and faulting.