Fireweed provides further details on new discovery at Boundary West, Macmillan Pass - Seite 2

Boundary West
The new discovery at Boundary West was made by drill testing a large gravity anomaly detected in August 2020 (see Map 1). Zinc mineralization at Boundary West is present in two sequences: the upper sequence; and the lower sequence. Each sequence broadly comprises an interval of stratiform zinc mineralization overprinted and underlain by an interval of vein-hosted zinc mineralization (see Table 1 and Cross section 1).

Upper sequence
The first drillhole into the gravity anomaly, NB20-004, intersected 25.6 metres of massive-sulphide mineralization from 130.6 m to 156.2 m, comprising mostly massive pyrite (>80% vol.) with some sphalerite and minor galena. Relict patches of black mudstone and mudstone fragments containing barite pseudomorphed by silica or pyrite are found within the massive-sulphide. This intersection is in the stratigraphy above Boundary Zone in rocks that are correlative with the host rocks to the Tom and Jason deposits. In subsequent drillholes NB20-007 and NB20-009, laminated sphalerite-galena-pyrite mineralization (similar in style to Tom and Jason) and semi-massive sulphides were intersected at the same stratigraphic interval as the massive-sulphide in NB20-004. Overprinting and underlying the stratiform interval, wide intervals of vein hosted pyrite-sphalerite mineralization were intersected: e.g. NB20-004 intersected 76.8 m of vein hosted and semi-massive pyrite-sphalerite mineralization below the massive-sulphide from 156.2 to 233.0 m (see Cross Section 1).

Dr. Jack Milton, Fireweed Chief Geologist, commented, “The upper interval in NB20-004 appears to represent a massive-sulphide cap to the system and the textures suggest that this layer may have originally been barite-rich and has been subsequently replaced by sulphide. There are strong textural parallels with other sediment-hosted massive-sulphide systems such as Red Dog, Alaska, and further parallels with the spatial relationship between the massive-sulphide and the underlying vein-hosted mineralization. This gives a compelling reason to step out the drilling next season and attempt to vector towards more feeder-proximal parts of the system where there is the potential for higher grade sections of massive-sulphide.”