Troilus Drills 3.38 G/T AuEq over 22 M Within 129.05 M at 0.95 G/T AuEq from Inferred Target IN the Z87 Reserve Pit *3.38 G/T AuEq (2.97 G/T Au, 1.80 G/T AG, 0.29 % Cu) over 22 M, 0.95 G/T AuEq (0.80 G/T Au, 1.11 G/T AG, 0.10 % Cu) over 129.05 M
TROILUS DRILLS 3.38 G/T AUEQ OVER 22 M WITHIN 129.05 M AT 0.95 G/T AUEQ FROM INFERRED
TARGET IN THE Z87 RESERVE PIT
*3.38 G/T AUEQ (2.97 G/T AU, 1.80 G/T AG, 0.29 % CU) OVER 22 M, 0.95 G/T AUEQ (0.80 G/T AU, 1.11
G/T AG, 0.10 % CU) OVER 129.05 M
Sept 17, 2026, Montreal, Quebec – Troilus Mining Corp. (“Troilus” or the “Company”) (TSX: TLG; OTCQX:
CHXMF; FSE: CM5), is pleased to announce the fourth batch of results from the Z87 optimization drill
program at its Troilus Gold-Copper Project located in north-central Quebec, Canada. The results reported
include nine drill holes totaling 4,728 metres, and form part of the 2026 exploration program outlined in
the Company’s March 31, 2026 press release.
The ongoing Z87 optimization program is is targeting Inferred material and historically unsampled
intervals within and around the current Z87 Reserve pit, with the objective of identifying opportunities to
improve the mine plan presented in the Company’s Technical Report on September 9th, 2026.
Importantly, the current Mineral Resource and Mineral Reserve estimates have an effective date of
December 31, 2025, and therefore exclude all drilling completed in 2026. The results reported today
continue to demonstrate mineralization in areas currently classified as Inferred or, in some cases, treated
as waste in the existing block model, creating potential opportunities for resource conversion, pit and
mining sequence optimization, strip ratio improvements and enhanced early-year mill feed.
Z87 Intercept Highlights:
▪ Hole 87-26-485 intersected 0.95 g/t gold equivalent (“ AuEq”) (0.80 g/t Au, 1.11 g/t Ag, 0. 10% Cu)
over 129.05 m, including 3.38 g/t AuEq (2.97g/t Au, 1.80 g/t Ag, 0.29 % Cu) over 22 m starting at 398
m downhole from an area of inferred material within the Z87 reserve pit (see Figures 1 and 2).
▪ Hole 87-26-531 intersected 0.99 g/t gold equivalent (“AuEq”) (0.84 g/t Au, 1.20 g/t Ag, 0.10 % Cu)
over 74.3 m, including 3.15 g/t AuEq (2.73 g/t Au, 1.88 g/t Ag, 0.30 % Cu) over 3.3m starting at 468
m downhole from an area of inferred material within the Z87 reserve pit (see Figures 1 and 2).
▪ Hole 87-26-529 intersected 1.15 g/t gold equivalent (“ AuEq”) (1.00 g/t Au, 0.84 g/t Ag, 0.11 % Cu)
over 45 m, including 5.42 g/t AuEq (4.73 g/t Au, 5.45 g/t Ag, 0.46 % Cu) over 2 m starting at 579 m
from an area of inferred material 70 m below the Z87 reserve pit(see Figures 1 and 3).
▪ Hole 87 -26-515 intersected several intervals of mineralization in the historically unsampled Z87
hangingwall where the current resource model does not contain mineralized blocks (see Figure 3 and
Table 1).
Justin Reid, CEO of Troilus, commented, “None of our 2026 drilling is included in the latest Resource and
Reserve estimates, and we continue to see impactful drill results from within and around the Z87 Reserve
pit. We are targeting Inferred material and historically unsampled intervals, and the drilling is showing
more extensive mineralization than is currently represented in the resource model. The results indicate
mineralization in an area that is currently modeled as waste. Subject to further drilling, geological
modelling, engineering evaluation and incorporation into future mine-plan updates, the mineralization
may have the potential to reduce waste movement and improve strip ratios in this portion of the
deposit.”.”
Z87 Optimization Program
Z87 was one of two zones previously mined by open pit during the former Troilus operation. Many of the
historical drill holes used to define the former mine reserve were not continuously sampled, leaving
intervals of core - in some cases extending for several hundred metres - without assay data.
For the purposes of resource estimation, these unsampled intervals are assigned values equal to one-half
of the laboratory detection limit, resulting in significant gaps within the current block model. The 2026
optimization program is systematically testing these areas to determine whether mineralization extends
through historically unsampled intervals that are presently modelled as waste.
The program is also targeting Inferred material within and around the current Z87 Reserve pit, with the
objective of collecting data to support potential conversion to the Indicated category and consideration
for possible incorporation into future Mineral Reserve and mine-plan updates.
The results announced today build on earlier 2026 drilling at Z87 that has demonstrated mineralization
beyond and within the current Reserve pit, including broad intervals encountered in historically
unsampled areas of the hangingwall (see press releases dated August 20, 2026, July 7, 2026 and June 25,
2026.)
All grades are uncut, and true thicknesses are approximately 75% to 90% of drilled length.
*The NI 43 -101 technical report associated with the mineral Resources and Reserves of the Troilus Project can be found on
SEDAR+ at www.sedarplus.ca under the Company’s issuer profile or on the Company’s website at www.troilusmining.com
Figure 1. Plan map with the reported drill hole locations from Z87
Figure 2. Cross section showing results for drillhole 87-26-485 and 87-26-531.
Figure 3. Cross section showing results for drillhole 87-26-515 and 87-26-529.
Z87 Drilling
Dillholes 87-26-485 was drilled to target inferred material within the Z87 reserve pit (see Figures 1 and 2).
The main zone returned 129.05 metres grading 0.95 g/t AuEq including 3.38 g/t AuEq over 22 metres,
which includes 4.34 g/t AuEq over 12.47 metres. This area of the reserve pit contains inferred blocks that
are not incorporated into the current mine plan. This drilling was planned with the goal of upgrading the
resource to the Indicated category for consideration in future production schedules.
On the same section, 120 metres down dip, drillhole 87-26-531 returned 125.5 metres grading 0.74 g/t
AuEq, including 74.3 metres grading 0.99 g/t AuEq from the main zone of Z87, where it was targeting
Inferred material. The hangingwall returned 20 metres grading 0.31 g/t AuEq and 41.4 metres grading
0.28 g/t AuEq where the current block model does not contain mineralization, as this area is informed by
historically unsampled drillholes.
On a section 50m south of 87-26-485 and 87-26 531 (Figure 1), drillhole 87-26-529 returned 1.15 g/t AuEq
over 45 metres within a broader zone of 0.51 g/t AuEq over 154 metres from the main zone of Z87
approximately 70 metres below the reserve pit (see Figure 3). This hole also returned 73 metres grading
0.35 g/t AuEq including 0.72 g/t AuEq over 13 metres from the Z87 hangingwall and 0.53 g/t AuEq over
40 metres including 1.54 g/t AuEq over 8 metres from the footwall. These intercepts present significantly
broader mineralization than is currently in the resource model.
87-26-515 was drilled to target an area of historically unsampled material approximately 50 metres up dip
of hole 87-26-529. This hole returned several intervals of mineralization where the current resource is
unmineralized due to the impacts of historically unsampled intervals being assigned half the lab analysis
detection limit for the purpose of resource estimation. These intercepts include 0.80 g/t AuEq over 8
metres including 1.48 g/t AuEq over 3 metres, 0.61 g/t AuEq over 12 metres including 1.52 g/t AuEq over
3.5 metres, 1.15 g/t AuEq over 7 metres including 5.04 g/t AuEq over 1 metres and 93 metres grading 0.46
g/t AuEq, which including intercepts of 1.07 g/t AuEq over 10 metres and 1.06 g/t AuEq over 10 metres.
To date, Troilus has released 39 drillholes totaling 14,521 metres of the approximately 24,000 metres
allocated to the Z87 pit optimization program, which includes the targeting of Inferred and unsampled
material within and around the reserve pit shell.
Table 1. Z87 Drill Results
Hole From (m) To (m) Interval
(m)
Au Grade
(g/t)
Cu Grade
(%)
Ag Grade
(g/t)
AuEq
Grade (g/t)
87-26-485 (-47° dip)
63 81 18 0.40 0.01 0.70 0.42
incl 68 69.38 1.38 2.95 0.04 5.00 3.07
173.5 175 1.5 0.75 0.01 0.50 0.77
214 221 7 0.20 0.02 0.38 0.23
233 237 4 0.39 0.03 0.31 0.44
257.77 273 15.23 0.22 0.03 0.47 0.27
348 390 42 0.31 0.02 0.32 0.33
398 527.05 129.05 0.80 0.10 1.11 0.95
incl 449 471 22 2.97 0.29 1.80 3.38
incl 456.18 468.65 12.47 3.91 0.30 1.82 4.34
incl 500 501 1 2.70 0.37 4.40 3.26
533 563 30 0.61 0.05 1.15 0.69
incl 540 545 5 1.48 0.13 4.08 1.72
incl 543 544 1 2.99 0.21 8.10 3.38
569 598 29 0.21 0.03 0.53 0.25
87-26-511 (-51° dip)
24 26 2 0.69 0.01 0.25 0.71
34 51 17 0.43 0.01 0.34 0.45
incl 46 47 1 2.02 0.00 0.25 2.03
58 67 9 0.17 0.02 0.35 0.21
80 94 14 0.22 0.00 0.25 0.22
115.5 117.5 2 0.65 0.00 0.25 0.66
180 188 8 0.34 0.03 0.47 0.39
236 240 4 0.52 0.00 0.25 0.53
87-26-515 (-62° dip)
32 38 6 0.28 0.01 0.25 0.30
50.45 56 5.55 0.80 0.03 1.38 0.86
incl 50.45 51.36 0.91 3.75 0.06 3.00 3.87
67 73 6 0.24 0.01 0.25 0.25
98 105 7 1.52 0.01 0.71 1.55
incl 104 105 1 9.57 0.08 3.50 9.73
141 149 8 0.77 0.02 0.51 0.80
incl 143 146 3 1.48 0.05 0.95 1.55
190 194 4 0.50 0.00 0.25 0.51
285 292 7 0.29 0.00 0.25 0.30
299 324 25 0.22 0.01 0.54 0.24
350 362.5 12.5 0.45 0.03 1.11 0.50
incl 362 362.5 0.5 7.08 0.00 0.25 7.09
371 383 12 0.58 0.02 0.60 0.61
incl 371 374.5 3.5 1.49 0.02 0.86 1.52
incl 371 372 1 3.94 0.01 0.25 3.96
388.5 396 7.5 0.22 0.01 0.25 0.23
405 412 7 1.11 0.03 0.35 1.15
incl 406 407 1 4.98 0.04 0.70 5.04
423 516 93 0.42 0.02 0.33 0.46
incl 447 457 10 0.96 0.07 0.69 1.07
incl 447 448 1 5.19 0.07 0.70 5.30
incl 456 457 1 1.77 0.31 2.10 2.21
incl 489 499 10 1.01 0.03 0.38 1.06
incl 490 491 1 3.79 0.08 1.50 3.92
87-26-529 (-60° dip)
130 148.15 18.15 0.47 0.02 0.76 0.52
incl 146 147 1 2.94 0.16 5.40 3.23
205 209 4 0.34 0.00 0.25 0.34
219 236 17 0.41 0.01 0.25 0.43
245 250 5 0.22 0.00 0.25 0.22
322.4 323 0.6 2.20 0.02 4.30 2.29
382 455 73 0.31 0.02 0.51 0.35
incl 387 388 1 3.47 0.30 9.60 3.99
incl 424 437 13 0.64 0.06 0.78 0.72
462 472 10 0.37 0.01 0.25 0.38
480 487 7 0.22 0.01 0.30 0.24
513 667 154 0.43 0.05 0.56 0.51
incl 579 624 45 1.00 0.11 0.84 1.15
incl 598 611 13 1.68 0.16 1.38 1.92
incl 598 600 2 4.73 0.46 5.45 5.42
incl 599 600 1 7.34 0.44 7.40 8.02
incl 610 611 1 5.81 0.09 1.10 5.94
674 714 40 0.45 0.05 1.36 0.53
incl 688 696 8 1.41 0.08 1.23 1.54
incl 691 692 1 6.75 0.19 3.30 7.05
87-26-531 (-60° dip)
15 24 9 0.52 0.01 1.96 0.56
incl 15 16 1 2.32 0.01 3.10 2.38
47 51 4 0.27 0.00 0.25 0.28
71 82 11 0.30 0.00 0.31 0.31
108 116 8 0.21 0.01 0.52 0.22
251 251.5 0.5 2.07 0.00 4.90 2.14
272 292 20 0.29 0.01 0.27 0.31
313 354.4 41.4 0.26 0.01 0.54 0.28
404 415 11 0.20 0.01 0.30 0.22
423 548.5 125.5 0.64 0.07 0.95 0.74
incl 440 446 6 0.92 0.07 0.65 1.02
incl 468 542.3 74.3 0.84 0.10 1.20 0.99
incl 491 499.3 8.3 1.83 0.17 1.96 2.09
incl 496 499.3 3.3 2.73 0.30 1.88 3.15
incl 516 517 1 3.69 0.00 0.25 3.70
560 586.5 26.5 0.44 0.06 1.45 0.54
incl 570 572 2 2.20 0.35 5.30 2.74
87-26-532 (-64° dip)
43 65 22 1.44 0.01 0.55 1.47
incl 48 61 13 2.25 0.01 0.61 2.27
incl 48 51 3 5.35 0.00 0.25 5.36
122 125 3 0.43 0.00 0.25 0.44
141 142 1 1.38 0.06 0.50 1.47
240 242 2 3.68 0.01 1.05 3.70
281 289 8 0.49 0.00 0.25 0.49
350 377 27 0.36 0.01 0.34 0.38
incl 350 353 3 1.04 0.05 0.68 1.12
393 408 15 0.49 0.03 0.32 0.53
incl 393 394 1 2.87 0.01 0.25 2.89
439 457 18 1.66 0.02 0.27 1.69
incl 442 443 1 26.50 0.02 0.60 26.53
464 542 78 0.64 0.09 1.04 0.78
incl 465 473 8 2.03 0.32 3.17 2.50
incl 468 473 5 2.64 0.42 4.42 3.26
incl 493 506 13 0.92 0.09 0.73 1.05
564 566 2 0.94 0.03 0.53 0.99
576 600 24 0.42 0.02 0.88 0.47
incl 591 592 1 2.74 0.02 2.70 2.80
incl 599 600 1 2.76 0.01 0.70 2.79
87-26-534 (-53° dip)
105 113 8 0.18 0.01 0.25 0.20
140 154 14 0.33 0.01 0.28 0.34