Silver Storm Drills 661 g/t Ag.Eq over 3.7 m and 328 g/t Ag.Eq over 15.4 m at San Marcos
TORONTO, ON / ACCESS Newswire / July 22, 2026 / Silver Storm Mining Ltd. ("Silver Storm" or the "Company") (TSXV:SVRS)(OTCQX:SVRSF)(FSE:SVR), is pleased to announce drill results from the diamond drilling program at the Company's 100%-owned La Parrilla Silver Mine Complex ("La Parrilla") located in Durango State, Mexico. Drill results in this release are from the mineralized oxide zones within the past-producing San Marcos underground mine.
Key highlights include:
Hole IDP-SM-26-003A returned 661 g/t Ag.Eq(1,2) over 3.70 meters ("m") (ETW(3) 3.48 m), including 1,231 g/t Ag.Eq over 1.60 m (ETW 1.50 m).
Hole EDP-SM-26-006 returned 328 g/t Ag.Eq over 15.35 m (ETW 11.76 m), including 1,461 g/t Ag.Eq over 2.00 m (ETW 1.53 m).
Hole IDP-SM-26-015 returned 617 g/t Ag.Eq over 3.90 m (ETW 2.24 m), including 969 g/t Ag.Eq over 1.90 m (ETW 0.75 m).
Hole IDP-SM-26-010 returned 366 g/t Ag.Eq over 5.05 m (ETW 4.97 m), including 554 g/t Ag.Eq over 1.70 m (ETW 1.67 m).
Hole IDP-SM-26-002 returned 221 g/t Ag.Eq over 8.05 m (ETW 7.56 m), including 744 g/t Ag.Eq over 1.50 m (ETW 1.41 m).
The infill and exploration drill results from San Marcos demonstrated the potential to extend the Indicated Resources by additional 100 m toward the surface over a strike length of 425 m, while the Inferred Resources have the potential to be extended by approximately 65 m toward the surface.
Greg McKenzie, President and CEO, stated: "We are impressed with the infill and exploration drill results at San Marcos that demonstrate the potential to grow the La Parrilla oxide Mineral Resource. We plan to follow up on these high-grade near-surface results with further drilling from our recently approved surface drill pads."
San Marcos Zone
The San Marcos zone is comprised of quartz-carbonate vein mineralization, striking north-northwest and dipping 60 degrees to the northeast, hosted within a fault zone marking the eastern contact of the granodiorite stock. The zone has a known strike length of approximately 650 m and a thickness of up to 17 m, with mineralization extending vertically for 450 m. While San Marcos is mainly characterized by oxide mineralization, the southern section of the zone below the 1875 m elevation is characterized by sulphide replacement mineralization (Figure 1).
Table 1 summarizes the results from the 20 infill and exploration holes drilled at San Marcos targeting the oxide mineralization.
Highlights from the near-surface drilling conducted within the central portion of the San Marcos oxide mineralization include:
Hole EDP-SM-26-006 returned 328 g/t Ag.Eq over 15.35 m (ETW 11.76 m), including 1,461 g/t Ag.Eq over 2.00 m (ETW 1.53 m).
Hole IDP-SM-26-015 returned 617 g/t Ag.Eq over 3.90 m (ETW 2.24 m), including 969 g/t Ag.Eq over 1.90 m (ETW 0.75 m).
Hole IDP-SM-26-010 returned 366 g/t Ag.Eq over 5.05 m (ETW 4.97 m), including 554 g/t Ag.Eq over 1.70 m (ETW 1.67 m).
Significant intersections from the drilling conducted within the northern portion of the San Marcos oxide mineralization include:
Hole IDP-SM-26-003A returned 661 g/t Ag.Eq over 3.70 m (ETW 3.48 m), including 1,231 g/t Ag.Eq over 1.60 m (ETW 1.50 m).
Hole IDP-SM-26-002 returned 221 g/t Ag.Eq over 8.05 m (ETW 7.56 m), including 744 g/t Ag.Eq over 1.50 m (ETW 1.41 m).
Notable intersections from the drilling conducted within the southern portion of the San Marcos oxide mineralization include:
Hole IDP-SM-26-017 returned 468 g/t Ag.Eq over 2.85 m (ETW 2.85 m), including 728 g/t Ag.Eq over 1.00 m (ETW 1.00 m).
Hole IDP-SM-26-018 returned 399 g/t Ag.Eq over 1.20 m (ETW 0.98 m) and 241 g/t Ag.Eq over 5.00 m (ETW 4.10 m).
The infill and exploration drill results from San Marcos have demonstrated the potential to extend the Indicated Resources by additional 100 m toward the surface along a strike length of 425 m, while Inferred Resources could potentially be extended by additional 65 m toward the surface.
Underground rehabilitation and development activities within the past-producing San Marcos mine are underway. All mineralized intersections reported in this release are proximal to existing development within the mine.
Silver Storm has secured permits authorizing the construction of drill pads and access roads to carry out drilling on 13 sites at San Marcos. The permits have been issued by the Mexican federal authority, Secretaría de Medio Ambiente y Recursos Naturales ("SEMARNAT"), and are valid for a period of five (5) years. These permits have been issued in addition to the ones announced in the June 18, 2026 news release titled "Silver Storm Receives La Parrilla Surface Drilling Permits". The Company plans to conduct follow-up drilling on the near-surface high-grade oxide mineralization encountered in the current underground drilling campaign to increase the Mineral Resources at San Marcos.
Silver Storm has two underground drill rigs and one surface drill rig in operation to advance the current drilling program. A total of 93 holes have been completed to date (~9,395 m).
For further information, the National Instrument 43-101 - Standards of Disclosure for Mineral Projects ("NI 43-101") Technical Report entitled "Independent Technical Report for the La Parrilla Silver Mine, Durango State, Mexico" with an effective date of March 24, 2025 is available for review on SEDAR (www.sedarplus.ca) and on the Company's website (www.silverstorm.ca).
Figure 1: Longitudinal section of the San Marcos zone (view to southwest)
Table 1(1) - Select assay intervals from the 2026 holes drilled at San Marcos; results from previous drilling conducted by Silver Storm and historic assay results
Zone | Hole | From | To | Length | ETW(3) (m) | Ag.Eq(2) | Ag | Au |
SM | EDP-SM-26-001 | 2.10 | 2.70 | 0.60 | 0.56 | 267 | 261 | 0.06 |
SM | EDP-SM-26-003 | 8.45 | 14.65 | 6.20 | 5.99 | 186 | 102 | 0.89 |
including | 8.45 | 10.95 | 2.50 | 2.41 | 286 | 102 | 1.96 | |
SM | EDP-SM-26-005 | 8.10 | 10.15 | 2.05 | 1.98 | 130 | 117 | 0.14 |
SM | EDP-SM-26-006 | 6.00 | 21.35 | 15.35 | 11.76 | 328 | 307 | 0.22 |
including | 7.00 | 9.00 | 2.00 | 1.53 | 1,461 | 1,460 | 0.01 | |
SM | EDP-SM-26-007 | 15.10 | 18.00 | 2.90 | 2.51 | 305 | 305 | 0.00 |
SM | EDP-SM-26-008 | 9.65 | 10.30 | 0.65 | 0.53 | 158 | 157 | 0.01 |
SM | IDP-SM-26-001 | 0.90 | 7.20 | 6.30 | 4.05 | 157 | 152 | 0.05 |
SM | IDP-SM-26-002 | 38.95 | 47.00 | 8.05 | 7.56 | 221 | 202 | 0.20 |
including | 38.95 | 40.45 | 1.50 | 1.41 | 744 | 686 | 0.61 | |
SM | IDP-SM-26-003A | 41.30 | 45.00 | 3.70 | 3.48 | 661 | 635 | 0.28 |
including | 41.30 | 42.90 | 1.60 | 1.50 | 1,231 | 1,195 | 0.38 | |
SM | IDP-SM-26-007 | 7.10 | 8.10 | 1.00 | 0.64 | 750 | 750 | 0.01 |
SM | IDP-SM-26-007 | 33.00 | 38.00 | 5.00 | 3.21 | 167 | 163 | 0.04 |
including | 33.00 | 36.00 | 3.00 | 0.96 | 348 | 337 | 0.12 | |
SM | IDP-SM-26-008 | 3.25 | 4.80 | 1.55 | 1.10 | 247 | 245 | 0.02 |
SM | IDP-SM-26-008 | 23.70 | 28.50 | 4.80 | 3.39 | 240 | 212 | 0.30 |
including | 25.30 | 26.10 | 0.80 | 0.57 | 725 | 720 | 0.05 | |
SM | IDP-SM-26-009 | 2.85 | 5.75 | 2.90 | 2.80 | 131 | 128 | 0.03 |
SM | IDP-SM-26-010 | 18.95 | 24.00 | 5.05 | 4.97 | 366 | 361 | 0.05 |
including | 22.30 | 24.00 | 1.70 | 1.67 | 554 | 546 | 0.09 | |
SM | IDP-SM-26-012 | 20.25 | 24.25 | 4.00 | 2.83 | 262 | 219 | 0.46 |
SM | IDP-SM-26-013 | 19.00 | 20.45 |