Selkirk Copper Intersects High-Grade Copper-Gold-Silver at the Minto East Zone, and Continues to Expand the Minto North West Zone
Selkirk Copper Intersects High-Grade Copper-Gold-Silver at the Minto East Zone, and
Continues to Expand the Minto North West Zone
Highlights
Drilling Results
Initial drilling at Minto East validates the previous resource model and better delineates a zone of high-grade
mineralization within the zone:
• 3.37% Cu, 1.88 g/t Au, and 14.96 g/t Ag over 6.5 m, within a broader zone of 2.50% Cu, 1.16 g/t Au
and 9.90 g/t Ag over 15.2 m from 101.3 m in drill hole 25SCM042.
Drilling at Minto North west continues to delineate high-grade mineralization, which remains open to the
north and south:
• 3.52% Cu, 3.51 g/t Au and 17.04 g/t Ag over 16.7 m, within a broader zone of 2.09% Cu, 1.84 g/t Au
and 9.48 g/t Ag over 32.9 m from 195.9 m in drill hole 25SCM043.
Drilling within and south of Ridgetop 2025 Mineral Resource Estimate (MRE) open pit resource indicates
near-surface mineralization continues to the south and west beyond the limits of the previous resource
estimation.
Drilling Program Update
• Four diamond drill rigs are active a t the Minto mine site delivering a high daily production of up to 100
metres per rig per day.
• As of February 12, 39,315 metres of drilling in 144 drill holes have been completed, or 78% of the planned
50,000 metre Phase 1 drill program. The Phase 1 drill program is expected to be completed by mid-March.
February 19, 2026 - Vancouver, BC and Pelly Crossing, YT – Selkirk Copper Mines Inc. (TSX-V:SCMI |
FRA:IO20 | OTCQB:SKRKF) (“Selkirk Copper ” or the “ Company”) is pleased to announce new assay
results from the on going 50,000 m drill program at the Minto Mine in Yukon, Canada.
M. Colin Joudrie, President & CEO, commented: “These latest results, combined with results announced in
December and January, continues to grow our confidence that the Minto property, including the Mine North
west zone, the Minto East zone, and the Ridgetop zones, has sufficient good grade and continuity to support our
target 12-15 year mine life and restart plan . After the holiday break, the exploration and development team
successfully mobilized to site to restart the program and with four drill rigs turning we expect to see the
conclusion of the first phase of drilling by mid-March. The Engineering Trade-Off Study and permit amendment
planning activities are progressing well, informing our Preliminary Economic Assessment (PEA) targeted for
completion mid-2026. We look forward to sharing additional drill results over the next two months as assay
results are received.”
2026 Drill Program Update
Drilling re -commenced on January 22 and quickly ramped up to full production in late January. Resource
expansion drilling continues to be the major focus of the Pha se 1 drill program, which was started in August
2025. Table 1 summarizes the drilling that has been completed thus far by zone. The current 50,000 metre Phase
1 drilling program is on track to be completed by mid -March. Drilling in the coming weeks will continue to
target the Minto East, Minto North, Minto Main Extension, and Ridgetop zones (Figure 1).
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Table 1: Drilling by Zone
Zone Holes
completed Metres drilled
Minto North 36 11,130
Ridgetop 65 13,439
Minto East 19 7,933
Copper Keel 7 1,990
118 13 3,740
Minto Main 7 3,083
Total 147 41,315
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Figure 1: Plan view of the Minto Mine showing surface projections of mineralization zones (Ridgetop, Copper Keel, 118, Minto East
and Minto North), relative to 2025 drill collars (yellow circles). Drill hole results released highlighted in orange circles.
Minto Main Ext
Minto North
Minto East
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Drill Results
Minto East
Initial drilling at the Minto East zone validates the previous resource model and better delineates high -grade
mineralization within a portion of the model that was previously based on wide spaced drilling. Reported here
are three holes from Minto East drilled in October, two of which returned significant intercepts.
Within the Minto East zone, multiple stacked lenses with significant mineralization, starting as shallow as 78
metres below surface and extending to depths of 450 metres, have been intersected by previo us drilling. These
lenses are sub -parallel to each other, dipping gently to the north with periodic open folding, resulting in an
undulating geometry. This geometry of stacked lenses and open folding at Minto East is similar to the Ridgetop
zone, located 1 .5 kilometres to the south. Minto East is bound to the north by the DEF fault, a relatively
significant post-mineral fault that separates Minto Main and Minto East zones from the Minto North zone.
Drill hole 25SCM042 tested an area of inferred resources w ithin the uppermost lenses at Minto East , infilling
an approximate 90- metre gap between historical drill holes . Results confirm the continuity of high- grade
mineralization through this gap. Mineralization in this lens is characterized by disseminated to fo lioform
chalcopyrite and minor bornite returning 3.37% Cu, 1.88 g/t Au, and 14.96 g/t Ag over 6.5 m, within a broader
zone of 2.50% Cu, 1.16 g/t Au and 9.90 g/t Ag over 15.2 m from 101.3 m equating to a copper equivalent of
3.45% (Figure 2).
As part of the 2026 drilling program, Selkirk Copper is also targeting expansions to the north of three known
lenses in proximity to the DEF fault while exploring for additional lenses at depth. Drill holes 25SCM082 and
25SCM110 tested approximately 80 and 1 75 metres north of previously drilled mineralization and intersected
visually observed mineralization consistent with the current geological model (Figure 2). Assay results are still
pending. The deepest lens, targeted by 25SCM082, which carries an average grade of 2. 10% copper (plus
associated gold and silver credits), represents a particularly compelling opportunity to expand the size of this
zone as it remains open in all directions and demonstrates strong vertical and lateral continuity.
Beyond resource validation and expansion, a key objective of the drill program is the systematic collection of
oriented core structural measurements, which will be integrated into an improved geological model to better
constrain fault offsets and lens geometry. Importantly, this structural data collection and drilling will investigate
the DEF fault to better understand the direction of fault movement and the potential to discover offset portions
of Minto Main and Minto East zones.
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Figure 2: Plan view and cross Section of Minto East, showing Phase 1 drilling targeting northern and deep extensions of
lenses 154, 156 and 203.
Minto North
Drilling at the Minto North w est zone continues to delineate the extents of high-grade mineralization within
the most recently discovered lens that remains open the south and to the north. Reported here are three holes
from Minto North west zone drilled in October, all of which returned significant mineralization.
Drill hole 25SCM043 intersected exceptional high-grade copper-gold-silver mineralization, including up to
16.2% Cu, 17.3 g/t Au, and 85.3 g/t Ag over 0.7 metre, within a broad 32.9-metre intercept averaging 3.54%
CuEq or 2.09% Cu, 1. 84 g/t Au and 9.48 g/t Ag. The high-grades within this hole are associated with net-
textured to massive bornite-chalcopyrite mineralization (Figure 3). Similar mineralization intersected in holes
30-50 m away to the west and south indicates a locally continuous high-grade zone. Preliminary modelling of
the Minto North west lens indicates high-grade mineralization is focused along a north-northwest trend within
a gently north-dipping lens. Similar geometry of shallowly dipping lenses and high-grade trends are observed
in other areas within Minto Mine , suggesting a consistent structural model that can be applied to guide drill
targeting and support improved resource estimation.
Notably, the Minto North west zone continues to demonstrate high concentrations of gold and silver associated
with copper mineralization. The gold and silver endowment represents significant value that Selkirk Copper is
now positioned to fully benefit from as a result of the removal of a gold-silver stream that was in place prior
to May 2023. The removal of the gold-silver stream incentivizes improved modelling of the precious metal
contained within the Minto North west zone which is creating a more complete understanding of the copper -
gold-silver mineralization and the architecture of the mineralized system overall.
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Figure 3: Drill core photographs showing net-texture to massive bornite-chalcopyrite-magnetite mineralization. This
mineral assemblage characterizes the highest-grade mineralization within the Minto North west zone
Ridgetop
Drilling at the Ridgetop zone continues to expand the extents of near -surface mineralization to the south and
southwest. The Phase 1 drill program at Ridgetop initially targeted under-drilled areas within the 2025 resource
but evolved based upon positive results to focus on extending the shallow mineralization south of the current
MRE open pit. Drilling in this area, which is still ongoing, includes 42 holes that have been completed to date.
Reported here are five holes from Ridgetop drilled in October, all of which intersected mineralization
significantly above the 2025 MRE open pit cutoff-grade of 0.30% CuEq.
Assay results from 25SCM045 are representative of the near -surface mineralization that continues to be
intersected to the south of Ridgetop zone, with an intercept grading 0.83% CuEq at shallow depths 35m below
surface. Assay results from 25SCM 031 are representative of higher -grade mineralization that occurs at
moderate depths, with an intercept of 9.6 m grading 1.82% CuEq.
Core logging at Ridgetop has identified intervals of primary sulphides (chalcopyrite and bornite), secondary
sulphides (chalcocite) and copper oxides (malachite and azurite). Selkirk Copper has initiated a sequential
leach analysis, mineralogical study, and metallurgical test program to better characterize mineral speciation
and copper recovery to concentrate. This work will support ongoing and future metallurgical studies and help
refine assumptions related to recovery characteristics in shallow and partially oxidized portions of the deposit
area.
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Figure 4: Plan view and Cross section view of the Ridgetop drilling
The location, azimuth, dip and depth of hole of this new drilling is summarized in Table 2 and significant
intervals are summarized in Table 3.
Table 2: Collar Locations and Header Information
Hole ID Easting Northing Azi Dip EOH (m) Zones
25SCM030 385801 6943499 340 -79 327.7 Copper Keel
25SCM031 385277 6943848 177 -67 357 Ridgetop
25SCM032 386041 6945029 225 -80 477 Minto East
25SCM033 384011 6945992 305 -76 300 Minto North
25SCM034 385804 6943499 235 -82 321 Copper Keel
25SCM035 385805 6943500 160 -75 309 Copper Keel
25SCM037 385276 6943845 217 -71 261 Ridgetop
25SCM038 384009 6945994 0 -76 300 Minto North
25SCM039 385843 6943624 262 -80 303 Copper Keel
25SCM040 384948 6943595 0 -90 105 Ridgetop
25SCM042 385434 6945048 0 -90 180 Minto East
25SCM043 384013 6945993 270 -70 267 Minto North
25SCM044 385845 6943626 322 -65 264 Copper Keel
25SCM045 384928 6943546 0 -90 150 Ridgetop
25SCM046 384979 6943515 0 -90 129 Ridgetop
25SCM048 385358 6944990 0 -90 180 Minto East
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Table 3: Significant Interval Table
Hole ID From To Length
(m)
Cu % Au g/t Ag g/t CuEq % Zone
25SCM030 123.7 136.0 12.3 0.45 0.12 1.06 0.55%
Copper
25SCM031 134.0 138.0 4.0 1.15 0.09 1.17 1.23% Ridgetop
151.3 161.0 9.7 1.36 0.55 6.59 1.82%
219.0 230.1 11.1 0.65 0.10 3.33 0.76%
265.0 271.6 6.6 0.55 0.10 2.34 0.65%
25SCM032 No Significant intercept
Minto East
25SCM033 199.0 239.0 40.0 0.83 0.34 3.69 1.11% Minto North
Incl. 228.0 239.0 11.0 1.93 0.95 9.10 2.57%
25SCM034 No Significant intercept
Copper Keel
25SCM035 No Significant intercept
Copper Keel
25SCM036 Lost Hole Ridgetop
25SCM037 153.00 159.1 6.1 1.08 0.22 1.95 1.26% Ridgetop
25SCM038 210.0 218.0 8.0 0.37 0.08 1.59 0.44% Minto North
232.0 251.0 19.0 0.44 0.19 2.01 0.60%
25SCM039 80.6 85.5 4.95 0.53 0.20 1.48 0.69% Copper Keel
184. 5 188.4 3.95 1.20 0.24 1.60 1.39%
216.0 222.0 6.0 0.69 0.21 1.82 0.86%
25SCM040 16.7 25.2 8.49 0.40 0.05 1.16 0.45%
Ridgetop
63.36 69.00 5.64 0.58 0.29 2.66 0.82%
25SCM041 Assays Pending
Ridgetop
25SCM042 76.00 87.08 11.08 0.92 0.30 2.52 1.16% Minto East
101.3 116.47 15.16 2.50 1.16 9.90 3.45%
Incl. 105.0 111.50 6.50 3.37 1.88 14.96 4.90%
25SCM043 195.95 228.8 32.93 2.09 1.00 9.48 2.92% Minto North
Incl. 212.1 228.8 16.7 3.52 3.51 17.04 6.28%
25SCM044 No Significant Intercept
25SCM045 35.3 40.9 5.6 0.70 0.14 2.48 0.83% Ridgetop
53.1 63.0 9.9 0.35 0.08 1.66 0.42%
25SCM046 42.2 59.1 16.9 0.35 0.08 1.08 0.42% Ridgetop
25SCM047 Assays Pending
Ridgetop
25SCM048 88.5 100.0 11.5 0.76 0.22 2.39 0.95% Minto East
At the Minto North and Minto East zones, the flat laying to shallowly dipping nature of the mineralized zones suggest that true widths are
typically >90% of the reported drill intersection length. At Ridgetop, true widths are approximate 85-90% of reported drill intersection
CuEq Calculation:
CuEq = ((Cu% × CuP × RCu × 2204.62)+(Au g/t ÷ 31.1035 × AuP × RAu) + (Ag g/t ÷ 31.1035 × AgP × RAg ))/(CuP × RCu × 2204.62)
Where:
CuP/AuP/AgP = US$ commodity prices of $4.25/lb Cu, $2500/oz Au, $29/oz Ag; RCu = Cu Recovery = 98%; RAu = Au Recovery = 85%; RAg= Ag
Recovery = 85%
Recoveries as estimated from historical mineral processing results.