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Minaurum Resource Step-Out Drilling Returns: 3.40 m of 397 g/t AgEq at Europa Sur, 1.90 m of 323 g/t AgEq at Quintera, and 0.90 m of 1469 g/t AgEq at San Jose in Alamos Silver Project

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Minaurum Resource Step-Out Drilling Returns: 3.40 m of 397 g/t AgEq at Europa Sur, 1.90 m of 323 g/t AgEq at Quintera, and 0.90 m of 1469 g/t AgEq at San Jose in Alamos Silver Project

Minaurum Silver Inc. (TSX-V: MGG) (OTCQX: MMRGF) is pleased to report high-grade silver drill results from the Europa, Quintera, San Jose, and Promontorio Sur Vein Zones, as part of its ongoing Phase II, 50,000-metre resource-expansion drilling program at the Alamos Silver Project in Sonora, Mexico.

Highlights include:

Europa Sur Vein Zone 

  • 1.60 m of 412 g/t silver equivalent
    (314 g/t Ag, 0.41 g/t Au, 0.42% Cu, 0.41% Pb, 0.78% Zn)
    including 0.40 m of 708 g/t AgEq
    (409 g/t Ag, 1.51 g/t Au, 1.27% Cu, 0.82% Pb, 1.66% Zn) (Hole AL26-233)
  • 3.40 m of 397 g/t AgEq
    (237 g/t Ag, 0.20 g/t Au, 0.95% Cu, 0.80% Pb, 1.87% Zn)
    including 0.30 m of 1,433 g/t AgEq
    (1,135 g/t Ag, 0.23 g/t Au, 2.26% Cu, 1.42% Pb, 2.36% Zn) (Hole AL26-246)

Quintera Vein Zone

  • 1.90 m of 323 g/t AgEq
    (263 g/t Ag, 0.02 g/t Au, 0.44% Cu, 0.27% Pb, 0.63% Zn) (Hole AL26-243)
  • 0.50 m of 1,559 g/t AgEq
    (1,460 g/t Ag,     0.04 g/t Au, 1.11% Cu, 0.01% Pb, 0.01% Zn)(Hole AL26-250)

San Jose Vein Zone

  • 0.90 m of 1,469 g/t AgEq
    (1,103 g/t Ag, 0.26 g/t Au, 2.42% Cu, 2.80% Pb, 3.35% Zn)
    including 0.50 m of 2,425 g/t AgEq
    (1,910 g/t Ag, 0.43 g/t Au, 3.90% Cu, 1.60% Pb, 4.71% Zn) (Hole AL26-249)

“Resource-expansion drilling continues to demonstrate the strong continuity of our high-grade silver vein zones-including Quintera and Europa Sur-while the San Jose vein delivered impressive results with silver grades exceeding 1 kg/t,” stated Darrell Rader, President and CEO. “Additionally, Promontorio Sur received its first round of step-out drilling, yielding encouraging initial results, with further assays to be released as they become available.”

Figure 1.  Plan view showing locations of Quintera, Promontorio, Europa, and San Jose vein zones. Click to enlarge.

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3455/315333_aee7c413b4619b6e_003full.jpg

Quintera – Travesia Vein Zones
Drilling at Quintera is successfully defining the vertical and horizontal extent of the high-grade silver shoot both below and along strike of the historical workings.  Positioned 100 to 150 metres in the hanging wall (western side) of the Quintera vein zone, the Travesia vein zone allows a single drill hole to intersect both systems.  Although Quintera was excluded from Minaurum’s initial resource estimate (see news release dated January 28, 2026), it will be incorporated into the upcoming resource update.

In the Travesia vein zone, hole AL26-243 intersected 1.90 m of 323 g/t AgEq, including 0.50 m of 715 g/t AgEq (637 g/t Ag, 0.69% Cu, 0.30% Pb, 0.53% Zn). Hole AL26-236 and hole AL25-250 cut 0.65 m of 318 g/t AgEq (236 g/t Ag, 0.01 g/t Au, 0.84% Cu, 0.31% Pb, 0.10% Zn) and 0.50 m of 1,559 g/t AgEq, respectively in the Quintera vein zone. Hole AL26-250 cuts Quintera approximately 100 m down-dip from the 5.95 m of 1,117 g/t AgEq intersection (Hole AL26-215) (see news release dated July 8, 2026), while hole AL26-236 cut the Quintera zone about 80 m to the north and 20 m higher than the AL26-250 intercept (Table 1, Figures 2, 3, and 4).

Table 1. Assay highlights for Quintera and Travesia vein zones.  True widths are based on current interpretation of mineralized structures. Weight-averaged silver-equivalent grades (AgEq g/t) are based on the October 1, 2025 Long-term CIBC Global Mining Group Analyst Consensus Commodity Price Forecast: Ag $29.73/tr oz, Au $2,646/tr oz, Cu $4.34/lb, Pb $0.92/lb, Zn $1.21/lb. Metallurgical recovery assumption: 88.3% for Ag, 88.5% for Au, 75.5% for Cu, 83% for Pb, 75% for Zn. 

Hole From
(m)		 To
(m)		 Interval
(m)		 True Width
(m)		 Ag 
g/t		 Au 
g/t		 Cu 
%		 Pb 
%		 Zn 
%		 AgEq
g/t
AL26-236 341.70 342.00 0.30 0.25 162 0.00 0.45 0.11 0.02 203
465.15 465.80 0.65 0.50 236 0.01 0.84 0.31 0.10 318
491.00 491.60 0.60 0.45 70 0.11 0.25 0.27 1.33 138
AL26-243 227.80 229.70 1.90 1.35 263 0.02 0.44 0.27 0.63 323
including
227.80 228.30 0.50 0.35 637 0.00 0.69 0.30 0.53 715
AL26-250 473.35 473.65 0.30 0.25 112 0.00 0.26 0.71 0.38 157
565.05 565.55 0.50 0.40 1460 0.04 1.11 0.01 0.01 1559

Figure 2.  Longitudinal section of Travesia vein zone, showing position of drill intercepts. Click to enlarge.

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3455/315333_aee7c413b4619b6e_004full.jpg

Figure 3. Longitudinal section of Quintera vein zone, showing drill intercepts and historical workings.
Click to enlarge.

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3455/315333_aee7c413b4619b6e_005full.jpg

Figure 4. Cross section of Travesia and Quintera vein zones, showing relationship of hole AL26-250 to holes AL26-215 and historical workings. Click to enlarge.

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3455/315333_aee7c413b4619b6e_006full.jpg

Promontorio Sur Vein Zone
South of the Promontorio mine, quartz-calcite veinlets with anomalous values of silver and copper cut andesitic volcanic rocks and can be traced for more than 1 km. Previous drilling reported high grades in the northern part of the Promontorio Sur vein zone adjacent to the NW-trending fault that separates it from the Promontorio zone in fault-controlled veining as well as in carbonate-replacement in limestone beneath the volcanics (see news releases dated August 22, 2019; September 24, 2024; February 13 and 27, 2025).

Step-out drilling about 200 m to the south of the NW-trending fault in Hole AL26-248 intersected 0.45 m of 386 g/t AgEq (177 g/t Ag, 0.86 g/t Au, 1.18% Cu, 0.30% Pb, 1.04% Zn) within a 6 m-wide vein zone (Table 2, Figure 2). Drilling continues at Promontorio Sur with assays pending.

 

Table 2. Assay highlights for Promontorio Sur vein zone.  True widths are based on current interpretation of mineralized structures. Weight-averaged silver-equivalent grades (AgEq g/t) are based on the October 1, 2025 Long-term CIBC Global Mining Group Analyst Consensus Commodity Price Forecast: Ag $29.73/tr oz, Au $2,646/tr oz, Cu $4.34/lb, Pb $0.92/lb, Zn $1.21/lb. Metallurgical recovery assumption: 88.3% for Ag, 88.5% for Au, 75.5% for Cu, 83% for Pb, 75% for Zn

Hole From
(m)		 To
(m)		 Interval
(m)		 True Width
(m)		 Ag 
g/t		 Au 
g/t		 Cu 
%		 Pb 
%		 Zn 
%		 AgEq 
g/t
AL26-248 83.50 85.60 2.10 1.90 41 0.51 0.28 0.17 0.30 121
including
83.50 83.95 0.45 0.40 177 0.86 1.18 0.30 1.04 386
and
85.10 85.60 0.50 0.45 2 0.93 0.04 0.33 0.26 101

Europa – Europa Sur Vein Zones
Europa Sur was not included in Minaurum’s initial resource (see news release dated January 28, 2026). Recent drilling at Europa Sur includes holes designed to intersect the upper 150-200 metres (from surface) of the structure.

Drill results to date from Europa Sur, including those in this news release show significant potential for resource expansion outside of the central Europa vein zone (see news releases dated March 31, May 27, and July 8, 2026). Furthermore, the zone is distinct from the central part of the Europa zone for its locally higher grades of gold and copper (see news release dated May 27, 2026).

Several high-grade silver, gold and copper intercepts were returned in addition to the headline holes AL26-233 (0.40 m of 409 g/t Ag, 1.51 g/t Au, 1.27% Cu) and AL26-246 (0.30 m of 1,135 g/t Ag, 0.23 g/t Au, 2.26% Cu). AL26-253 intersected a 3.15 m interval of mineralization including 0.55 m of 298 g/t AgEg (185 g/t Ag, 0.02 g/t Au, 0.80% Cu, 0.82% Pb, 1.14% Zn). Hole AL26-232 intersected 1.80 m of mineralization which included 0.30 m of 341 g/t AgEq (261 g/t Ag, 0.01 g/t Au, 0.80% Cu, 0.31% Pb, 0.18% Zn) (Table 3, Figures 5 and 6).

Both are step-out holes approximately 80 m below and above, respectively, intersecting the pinch of the vein as indicated by the previously drilled higher grade intercept in hole AL26-225 returning 5.15 m of 392 g/t AgEq (198 g/t Ag, 0.27 g/t Au, 1.10% Cu, 1.69% Pb, 1.75% Zn) (see news release dated August 25, 2026).

Hole AL26-239 cut 2.70 m of 179 g/t AgEq (79 g/t Ag, 0.36 g/t Au, 0.27% Cu, 0.57% Pb, 1.40% Zn) including 0.30 m of 734 g/t AgEq (343 g/t Ag, 1.31 g/t Au, 1.58% Cu, 1.28% Pb, 4.80% Zn) demonstrating the potential for additional high-grade gold and copper.

Figure 5. Longitudinal section of Europa-Europa Sur vein zone, showing locations of highlighted mineralized intersections. Click to enlarge.

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3455/315333_aee7c413b4619b6e_007full.jpg

Figure 6. Cross section of Europa-Europa Sur vein zone, showing locations of highlighted mineralized intersections n hole AL26-253 above and AL26-232 below AL26-225. Click to enlarge

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3455/315333_aee7c413b4619b6e_008full.jpg

 

Table 3. Assay highlights for Europa Sur vein zone.  True widths are based on current interpretation of mineralized structures.Weight-averaged silver-equivalent grades (AgEq g/t) are based on the October 1, 2025 Long-term CIBC Global Mining Group Analyst Consensus Commodity Price Forecast: Ag $29.73/tr oz, Au $2,646/tr oz, Cu $4.34/lb, Pb $0.92/lb, Zn $1.21/lb. Metallurgical recovery assumption: 88.3% for Ag, 88.5% for Au, 75.5% for Cu, 83% for Pb, 75% for Zn. 

Hole From
(m)		 To
(m)		 Interval
(m)		 True Width
(m)		 Ag 
g/t		 Au 
g/t		 Cu 
%		 Pb 
%		 Zn 
%		 AgEq 
g/t
AL26-232 173.30 173.65 0.35 0.32 162 0.05 0.36 0.45 0.75 224
439.45 441.25 1.80 1.62 87 0.00 0.38 0.32 0.29 133
including
439.45 439.75 0.30 0.27 261 0.01 0.80 0.31 0.18 341
and
440.65 441.25 0.60 0.54 88 0.01 0.50 0.44 0.42 150
444.60 444.90 0.30 0.27 190 0.01 0.37 1.07 0.24 249
AL26-233 135.20 136.80 1.60 1.36 314 0.41 0.42 0.41 0.77 412
including
135.20 135.60 0.40 0.34 409 1.51 1.27 0.82 1.66 708
170.95 171.40 0.45 0.40 274 0.06 0.43 0.29 0.57 335
176.80 177.70 0.90 0.75 144 0.02 0.20 0.21 0.43 177
including
177.40 177.70 0.30 0.25 340 0.04 0.38 0.49 1.00 409
238.75 239.05 0.30 0.25 444 0.08 0.76 0.45 0.12 528
283.20 283.50 0.30 0.25 620 0.07 0.52 0.58 0.17 686
289.90 290.20 0.30 0.25 166 0.05 0.19 0.21 0.14 194
309.05 309.35 0.30 0.25 471 0.13 0.63 0.97 0.44 566
AL26-234 458.65 459.35 0.70 0.65 114 0.01 0.13 0.12 0.54 141
AL26-235 264.10 264.40 0.30 0.28 141 0.05 0.53 0.32 1.19 226
AL26-237 413.85 414.15 0.30 0.28 143 0.01 0.27 0.13 0.15 173
AL26-239 257.35 257.65 0.30 0.25 801 0.18 0.39 0.39 0.79 877
268.40 269.00 0.60 0.50 547 0.12 0.81 0.57 0.31 646
412.60 415.30 2.70 2.30 79 0.36 0.27 0.57 1.40 179
including 
412.60 413.80 1.20 1.05 134 0.68 0.56 0.97 2.44 320
which includes
412.90 413.20 0.30 0.25 343 1.31 1.58 1.28 4.80 734
418.30 418.90 0.60 0.50 400 0.33 0.24 0.63 1.43 496
AL26-240 459.40 459.70 0.30 0.25 57.8 0.03 0.09 1.00 2.41 145
AL26-242 295.00 298.20 3.20 2.75 159 0.07 0.15 0.29 0.61 198
including
296.45 298.20 1.75 1.50 231 0.11 0.18 0.43 0.89 286
which includes
297.70 298.20 0.50 0.43 355 0.16 0.16 0.46 0.62 406
AL26-245 289.95 290.50 0.55 0.45 99 0.02 0.25 0.39 1.84 174
AL26-246 143.05 144.80 1.75 1.25 180 0.03 0.22 0.40 0.60 223
including
143.05 143.45 0.40 0.30 303 0.05 0.35 0.50 1.20 375
394.10 397.50 3.40 2.50 237 0.20 0.95 0.80 1.87 397
including
394.85 395.15 0.30 0.20 1135 0.23 2.26 1.42 2.36 1433
and
396.20 397.50 1.30 1.00 262 0.33 1.63 1.43 3.02 530
AL26-247 160.85 161.15 0.30 0.28 120 0.03 0.18 0.30 0.64 160
211.10 211.75 0.65 0.60 621 0.18 0.92 1.63 3.72 837
296.20 297.70 1.50 1.35 223 0.01 0.14 0.16 0.16 243
including
296.20 296.60 0.40 0.35 443 0.02 0.25 0.16 0.06 471
342.05 342.40 0.35 0.30 284 0.01 0.30 0.62 1.59 361
385.20 386.00 0.80 0.75 375 0.09 0.78 0.25 0.95 477
including
385.65 386.00 0.35 0.32 752 0.18 1.56 0.42 1.80 952
411.00 416.05 5.05 4.55 181 0.03 0.35 0.57 1.00 248
including
412.30 414.00 1.70 1.55 336 0.04 0.69 0.80 2.06 464
and
415.55 416.05 0.50 0.45 311 0.06 0.47 1.24 0.37 390
AL26-252 135.80 137.15 1.35 0.95 84 0.30 0.31 0.50 1.23 176
AL26-253 352.85 356.00 3.15 2.80 112 0.04 0.34 0.74 0.86 180
including
353.75 354.30 0.55 0.50 185 0.02 0.80 0.82 1.14 298
and
355.70 356.00 0.30 0.27 104 0.27 0.45 4.20 3.05 324
371.80 373.70 1.90 1.70 75 0.06 0.47 0.41 0.29 136
including
373.30 373.70 0.40 0.37 184 0.11 1.32 0.66 0.72 337
AL26-255 167.65 168.60 0.95 0.75 235 0.00 0.20 0.11 0.07 256
including
167.65 168.10 0.45 0.35 374 0.00 0.30 0.18 0.10 406

San Jose Vein Zone
Hole AL26-249 demonstrated the high-grade potential of the San Jose vein zone, intersecting 0.90 m of 1,469 g/t AgEq (1,103 g/t Ag, 0.26 g/t Au, 2.42 % Cu, 2.80% Pb, 3.35% Zn), including 0.50 m of 2,425 g/t AgEq (1,910 g/t Ag, 0.43 g/t Au, 3.90% Cu, 1.59% Pb, 4.71% Zn) (Table 4, Figure 7).

Figure 7. Longitudinal section of the San Jose vein zone, showing positions of drill intercepts.

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3455/315333_aee7c413b4619b6e_009full.jpg

 

Table 4. Assay highlights for San Jose vein zone.  True widths are based on current interpretation of mineralized structures.Weight-averaged silver-equivalent grades (AgEq g/t) are based on the October 1, 2025 Long-term CIBC Global Mining Group Analyst Consensus Commodity Price Forecast: Ag $29.73/tr oz, Au $2,646/tr oz, Cu $4.34/lb, Pb $0.92/lb, Zn $1.21/lb. Metallurgical recovery assumption: 88.3% for Ag, 88.5% for Au, 75.5% for Cu, 83% for Pb, 75% for Zn. 

Hole From
(m)		 To
(m)		 Interval
(m)		 True Width
(m)		 Ag 
g/t		 Au 
g/t		 Cu 
%		 Pb 
%		 Zn 
%		 AgEq 
g/t
AL26-231 310.40 311.50 1.10 0.95 74 0.03 0.34 0.12 0.03 109
AL26-238 150.15 150.75 0.60 0.56 93.4 0.00 0.10 0.07 0.08 106
AL26-241 210.50 215.50 5.00 4.00 142 0.02 0.16 0.39 0.26 171
including
211.10 211.50 0.40 0.33 284 0.02 0.51 0.50 0.15 343
AL26-244 191.65 192.00 0.35 0.30 68.3 0.02 0.06 0.10 0.04 79
AL26-249 162.80 163.70 0.90 0.85 1103 0.26 2.42 2.80 3.35 1469
including
163.20 163.70 0.50 0.48 1910 0.43 3.90 1.59 4.71 2425
AL26-251 146.90 147.55 0.65 0.50 18 0.00 0.14 0.00 0.01 30
AL26-254 162.45 163.20 0.75 0.68 133 0.02 0.36 0.03 0.07 167
275.65 277.45 1.80 1.65 83 0.01 0.06 2.18 1.15 160
including
275.65 276.10 0.45 0.40 165 0.03 0.05 3.58 0.91 265

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Minaurum Silver Inc. (TSX-V: MGG) (OTCQX: MMRGF) (FSE: 78M0) is an Americas-focused explorer concentrating on the high-grade 100% owned, production-permitted Alamos silver project in southern Sonora, Mexico and the Lone Mountain CRD Project in Nevada, USA. Minaurum is managed by one of the strongest technical and finance teams and will continue its founders’ legacy of creating shareholder value by acquiring and developing a pipeline of Tier-One precious-and base metal projects.

ON BEHALF OF THE BOARD

“Darrell A. Rader“

Darrell A. Rader
President and CEO

For more information, please contact:
Sunny Pannu – Investor Relations and Corporate Development Manager

The TSX Venture Exchange does not accept responsibility for the adequacy or accuracy of this news release.

___________________________________________________________________________
1570- 200 Burrard Street
Vancouver, BC V6C 3L6

Telephone: 1 778 330-0994
www.minaurum.com
info@minaurum.com

Posted September 24, 2026
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