Troilus Continues to Expand High-Grade WEST Rim Discovery with 19.06 G/T AuEq over 6.4 M and 6.81 G/T AuEq over 5 M at Surface
TROILUS CONTINUES TO EXPAND HIGH-GRADE WEST RIM DISCOVERY WITH 19.06 G/T AUEQ OVER 6.4
M AND 6.81 G/T AUEQ OVER 5 M AT SURFACE
JUNE 11, 2026, Montreal, Quebec – Troilus Mining Corp. (“Troilus” or the “Company”, TSX: TLG; OTCQX:
CHXMF; FSE: CM5R) is pleased to announce additional drill results from the West Rim Zone (“West Rim”)
as part of its ongoing 2026 Exploration Program (see March 31, 2026 press release) at its copper -gold
Troilus Project located in northcentral Quebec, Canada.
The now completed Phase 1 West Rim drill program focused on expanding the mineralized footprint of
the West Rim Zone, which was initially discovered in 2024 through near-mine exploration drilling west of
the North Reserve Pit (see May 30, 2024 press release). The latest results continue to demonstrate the
emergence of a significant high-grade mineralized zone located entirely outside the current mineral
resource estimate and within 200 metres of the reserve pit outlined in the Company’s 2024 Feasibility
Study (see May 14, 2024 press release).
Importantly, the intercepts reported from West Rim compare favourably to some of the highest -grade
near-surface intercepts associated with the current reserve pit areas at Troilus while remaining in close
proximity to planned mining and infrastructure area s. The results continue to support the potential for
both open pit and underground development scenarios at West Rim. All grades are uncut, and true
thicknesses are approximately 75% to 90% of drilled length.
West Rim Intercept Highlights (see Figure 1):
Hole WR-26-013 intersected 6.93 g/t gold equivalent (“AuEQ”) (6.91 g/t Au, 0.97g/t Ag, 0.00 % Cu)
over 18.5 m, including 19.06 g/t AuEQ (19.03 g/t Au, 1. 76 g/t Ag, 0. 00 % Cu) over 6.4 m, which
includes 53.90 g/t AuEQ ( 53.85 g/t Au, 4.29 g/t Ag, 0. 00 % Cu) over 2 m , starting at just 11.5 m
downhole.
Hole WR-26-014 intersected 1.80 g/t gold equivalent (“AuEQ”) (1.75 g/t Au, 2.64 g/t Ag, 0.01 % Cu)
over 23.85 m, including 3.82 g/t AuEQ (3.77 g/t Au, 4.09 g/t Ag, 0.00 % Cu) over 9.8 m, which includes
6.81 g/t AuEQ (6.71 g.t Au, 7.73 g/t Ag, 0.01 % Cu) over 5 m, starting at just 19.25 m downhole.
Hole WR-26-015 intersected 1.58 g/t gold equivalent (“AuEQ”) (1.56 g/t Au, 0.92 g/t Ag, 0.01 % Cu)
over 13.5 m, including 16.23 g/t AuEQ (16.20 g/t Au, 2.10 g/t Ag, 0.00 % Cu) over 0.6 m starting at
113.5 m downhole.
Justin Reid, CEO of Troilus, commented, “West Rim continues to deliver some of the strongest near-
surface drill results encountered to date at Troilus, immediately adjacent to our planned reserve pits and
entirely outside the current resource estimate. The consistency of high-grade mineralization we are seeing
across the trend is particularly encouraging and continues to demonstrate the potential for West Rim to
evolve into a meaningful near-mine zone within the broader Troilus Project. Importantly, these latest
intercepts continue to outperform the original discovery drilling completed in 2024 while reinforcing the
significant exploration upside that remains across the property. With only approximately half of the
planned drilling completed to date at West Rim, we believe there remains considerable opportunity for
further expansion.”
*The completed NI 43-101 technical report associated with the Troilus Project FS can be found on SEDAR+ at www.sedarplus.ca
under the Company’s issuer profile or on the Company’s website at www.troilusgold.com
West Rim Drilling
Drillhole WR-26-013 returned 6.93 g/t AuEQ over 18.5 metres, including 19.06 g/t AuEQ over 6.4 metres,
while drillhole WR-26-14 returned 1.80 g/t AuEQ over 23.85 metres, including 6.81 g/t over 5 metres from
the main West Rim trend. These intercepts begin at shallow downhole depths of just 11.5 metres and
19.25 metres, respectively, and are located approximately 100 metres apart along strike.
Together, these intercepts define a continuous high-grade corridor near surface and represent some of
the strongest near-pit grade-thickness results drilled to date at Troilus. The mineralization remains open
along strike and at depth.
The main West Rim trend extends an additional 170 metres to the north where drillhole WR-26-016
returned 2.92 g/t AuEQ over 19 metres including 7.82 g/t AuEQ over 5 metres (see May 19, 2026 press
release). Mineralization presents as layered bands of semi-massive pyrite and pyrrhotite with enrichment
in gold and silver. There is little to no copper contributing to the gold equivalent formula.
Further down dip, drillhole WR-26-015 returned 1.58 g/t AuEQ over 13.5 metres including 16.23 g/t AuEQ
over 0.6 metres beginning at 113.5 metres downhole. This intercept is located approximately 100 metres
down dip from the original discovery hole X22-24-080 (see May 30, 2024 press release), which returned
1.37 g/t AuEQ over 11 metres within a broader zone of 0.74 g/t AuEQ over 32 metres, and continues to
demonstrate the continuity of high-grade mineralization at depth within the system.
Next Steps
All results are being incorporated into the evolving geological and structural model for West Rim, with
planning underway for an expanded Phase 2 drill campaign.
The results released to date represent approximately half of the 3,000 metres budgeted for West Rim in
2026. Given the success of the initial drilling campaign, the Company expects to continue both infill and
expansion drilling along the known mineralized trend while also testing the broader West Rim corridor,
which remains largely underexplored along its interpreted five-kilometre prospective strike length.
Upcoming work is expected to include additional drilling, structural interpretation, and trial geophysical
techniques aimed at improving targeting within the highly deformed sulfide-rich mineralized system.
Figure 1. Plan map with the reported drill hole locations
Table 1. West Rim Drill Results
Hole From
(m) To (m) Interval
(m)
Au Grade
(g/t)
Cu Grade
(%)
Ag Grade
(g/t)
AuEq Grade
(g/t)
WR-26-013
11.5 30 18.5 6.91 0.00 0.97 6.93
incl 23.6 30 6.4 19.03 0.00 1.76 19.06
incl 24.1 26.1 2 53.85 0.00 4.29 53.90
incl 25 26.1 1.1 89.80 0.00 6.00 89.87
incl 26.1 30 3.9 3.33 0.00 0.42 3.34
WR-26-014
19.25 43.1 23.85 1.75 0.01 2.64 1.80
incl 24 33.8 9.8 3.77 0.00 4.09 3.82
incl 24 29 5 6.71 0.01 7.73 6.81
incl 24 26 2 12.58 0.01 16.10 12.78
WR-26-015
133.5 147 13.5 1.56 0.01 0.92 1.58
incl 141.3 142 0.6 16.20 0.00 2.10 16.23
WR-26-018
35 38 3 1.71 0.01 0.47 1.73
90 98 8 0.23 0.01 0.73 0.26
WR-26-021
71 81 10 0.69 0.01 0.47 0.71
149 152 3 3.03 0.03 5.05 3.14
* AuEq = Au grade + 1.5107 * Cu grade + 0.0119 * Ag grade
Quality Assurance and Control
During the drill program, one meter assay samples were taken from NQ core and sawed in half. One-half
was sent for assaying at ALS Laboratory, a certified commercial laboratory, and the other half was retained
for results, cross checks, and future reference. A strict QA/QC program was applied to all samples; which
included insertion of one certified mineralized standard and one blank sample in each batch of 25 samples.
Every sample was processed with standard crushing to 85% passing 75 microns on 500 g splits. Samples
were assayed by one-AT (30 g) fire assay with an AA finish and if results were higher than 3.5 g/t Au, assays
were redone with a gravimetric finish. For QA/QC samples, a 50 g fire assay was done. In addition to gold,
ALS laboratory carried out multi-element analysis for ME-ICP61 analysis of 33 elements four acid ICP-AES.
Qualified Person
The technical and scientific information in this press release has been reviewed and approved by Nicolas
Guest, P.Geo., Exploration Manager, who is a Qualified Person as defined by NI 43-101. Mr. Guest is an
employee of Troilus and is not independent of the Company under NI 43-101.
AuEq Disclosure
The formulas used to calculate equivalent values for resources are as follows, for 87 Pit AuEq = Au +
1.5628*Cu +0.0128 *Ag, for J Pit AuEq = Au + 1.5107*Cu +0.0119 *Ag, for SW Pit AuEq = Au + 1.6823*Cu
+0.0124 *Ag, for X22 Pit AuEq = Au + 1.5628*Cu +0.0128 *Ag. AuEq was calculated using metal prices of
$1,850/oz Au; $4.25/lb Cu and $23.00/oz Ag.
About Troilus Mining Corp.
Troilus Mining Corp. is a Canadian development -stage mining company focused on the systematic
advancement of the former gold and copper Troilus Mine towards production. Troilus is located in the
tier-one mining jurisdiction of Quebec, Canada, where it holds a large land position of 435 km² in the
Frôtet-Evans Greenstone Belt. A Feasibility Study completed in May 2024 supports a large-scale 22-year,
50ktpd open-pit mining operation, positioning it as a cornerstone project in North America.
For more information:
Caroline Arsenault
VP Corporate Communications
+1 (647) 407-7123
Cautionary Note Regarding Forward-Looking Statements and Information
This press release contains “forward- looking statements” within the meaning of applicable Canadian
securities legislation. Forward- looking statements include, but are not limited to, statements regarding
the impact of the drill results on the Company, their potential impact on mineral resource and reseve
estimates and open pit and underground development scenarios at West Rim and the likelihood that these
results will contribute to the expansion of a meaningful near-mine zone within the broader Troilus Project,
the results of the FS, including, without limitation various project economics, financial and operational
parameters such as the timing and amount of future production from the Project , expectations with
respect to the IRR, NPV, payback and costs of the Project, anticipated mining and processing methods of
the Project; proposed infrastructures, anticipated mine life of the Project, expected recoveries and grades,
development plans, opportunity to expand the scale of the project, the project becoming a cornerstone
mining project in Noth America; the development potential and timetable of the project; the estimation of
mineral resources and reserves; realization of mineral resource and re serve estimates; the timing and
amount of estimated future exploration; costs of future activities; capital and operating expenditures;
success of exploration activities; the anticipated ability of investors to continue benefiting from the
Company’s low discovery costs, technical expertise and support from local communities, the timing and
amount of estimated future exploration; and the anticipated results of the Company’s remaining 2026
drill program and their possible impact on the potential size of the mineral resource estimate. Generally,
forward-looking statements can be identified by the use of forward- looking terminology such as “plans”,
“expects” or “does not expect”, “is expected”, “budget”, “scheduled”, “estimates”, “forecasts”, “intends”,
“continue”, “anticipates” or “does not anticipate”, or “believes”, or variations of such words and phrases
or statements that certain actions, events or results “may”, “could”, “would”, “will”, “might” or “will be
taken”, “occur” or “be achieved”. Forward-looking statements are made based upon certain assumptions
and other important facts that, if untrue, could cause the actual results, performances or achievements of
Troilus to be materially different from future results, performances or achievements expressed or implied
by such statements. Such statements and information are based on numerous assumptions regarding
present and future business strategies and the environment in which Troilus will operate in the future .
Certain important factors that could cause actual results, performances or achievements to differ
materially from those in the forward -looking statements include, amongst others, currency fluctuations,
the global economic climate, dilution, share price volatility and competition. Forward-looking statements
are subject to known and unknown risks, uncertainties and other important factors that may cause the
actual results, level of activity, performance or achievements of Troilus to be materially different from
those expressed or implied by such forward-looking statements, including but not limited to: there being
no assurance that the exploration program or programs of the Company will result in expanded mineral
resources; risks and uncertainties inherent to mineral resource and reserve estimates; the high degree of
uncertainties inherent to feasibility studies and other mining and economic studies which are based to a
significant extent on various assumptions; variations in gold prices and other metals, ex change rate
fluctuations; variations in cost of supplies and labour; receipt of necessary approvals; availability of
financing for project development; uncertainties and risks with respect to developing mining projects;
general business, economic, competitive, political and social uncertainties; future gold and other metal
prices; accidents, labour disputes and shortages; environmental and other risks of the mining industry,
including without limitation, risks and uncertainties discussed in the Company’s latest Annual Information
Form, its technical reports and other continuous disclosure documents of the Company available under the
Company’s profile at www.sedarplus.ca. Although Troilus has attempted to identify important factors that
could cause actual results to differ materially from those contained in forward- looking statements, there
may be other factors that cause results not to be as anticipated, estimated or int ended. There can be no
assurance that such statements will prove to be accurate, as actual results and future events could differ
materially from those anticipated in such statements. Accordingly, readers should not place undue reliance
on forward-looking statements. Troilus does not undertake to update any forward- looking statements,
except in accordance with applicable securities laws.