GR Silver Mining Receives a 5-Year Milestone Drill Permit for the San Marcial Area of the Plomosas Silver Project
GR Silver Mining Receives a 5-Year Milestone Drill
Permit for the San Marcial Area of the Plomosas
Silver Project
VANCOUVER, BC
,
Sept. 9, 2025
/CNW/ -
GR Silver Mining Ltd.
("
GR Silver Mining
" or the "
Company
") (TSXV:
GRSL) (OTCQB: GRSLF) (FRANKFURT: GPE) is pleased to announce that it has received a key 5-year drill permit
for the San Marcial Area authorizing additional step-out and exploration drilling in an extensive area surrounding the
current NI 43-101 Resource Area. The five-year Informe Preventivo ("
IP
") issued by the Secretaría de Medio
Ambiente y Recursos Naturales ("
SEMARNAT
"),
Mexico
will allow for the drilling of step-out and exploration holes
at 46 new drill sites in the San Marcial Area.
The IP does not limit the total metreage, nor number of drill holes, that can be drilled in the 46 newly approved drill
sites. This provides the Company with flexibility for multiple drill hole orientations within the three defined target
areas shown in Figure 1, as well as the ability to explore new targets along the edges of the chargeability
geophysical anomaly.
This is the first time that the Company has been granted such a long-term drill permit, which bodes well for its
initiatives to expand known mineralization and support resource growth, in addition to exploring the recently
discovered silver-rich epithermal system sitting on the edge of a regional-scale porphyry intrusive related geological
setting. Receipt of the drill permit is also evidence that GR Silver Mining's persistent and patient efforts, as well as
constructive engagement with Mexican authorities, has been effective in successfully advancing the Plomosas Silver
Project.
The receipt of the permit allows the Company to proceed with the following activities in the coming months:
1
.
Complete the final 3 drill holes of the 2025 summer drilling program as outlined in the
September 3
press release.
Upon completion and receipt of all assays, incorporate all drilling data into the 3D model,
including recent discoveries such as SMS25-09 (
75m
at 293 g/t AgEq)
1
. This will guide the planning of future
step-out drilling in the San Marcial Area.
2
.
Conduct additional geophysical investigations
, including potential down-hole geophysical surveys in key drill
holes within the Resource Area. These surveys will assist in modeling and targeting high-grade silver
mineralized hydrothermal breccias beneath the existing Resource Area. Modern down-hole geophysics will
serve as an alternative to support directional drilling, increasing the likelihood of intersecting the epithermal
system down-dip from the Resource Area boundaries.
3
.
Post-completion of the above activities
, the Company will proceed with further steps in the negotiations with
third-party drilling companies for follow-up drilling programs at the San Marcial Area.
4
.
Advance additional drilling
under the new drill permit, using the updated 3D model and geophysical surveys
scheduled for the summer of 2025 and continuing throughout the rest of the year.
The drilling results in the summer 2025 drilling phase have expanded the San Marcial mineralized footprint,
extending high-grade mineralization a further 100 metres below the previous resource outline. Within these broad
zones of silver-dominant, high-grade mineralization, a transition with depth has been observed, marked by changes
in alteration and lithology, which supports our interpretation of a robust epithermal system hosted along the northern
margin of a large regional-scale porphyry intrusive complex. These results validate our exploration model and
highlight the significant potential for future resource growth.
__________________________
1
https://www.newswire.ca/news-releases/gr-silver-mining-intersects-extensive-high-grade-epithermal-silver-system-sms25-09-returns-75-m-at-293-g-t-ageq-including-6-4-m-at-1-915-g-t-ageq-826058411.html
Figure 1 Location Map – Current Step-Out Drilling Program and Intrusive Related Chargeability Anomaly with Target
Areas (CNW Group/GR Silver Mining Ltd.)
Qualified Person
The Qualified Person under National Instrument 43-101 Standards of Disclosure for Mineral Projects for this news
release is
Marcio Fonseca
, P. Geo., President & CEO for GR Silver Mining, who has reviewed and approved its
contents.
About the Plomosas Project
The Plomosas Project, including the recent high-grade silver discovery in the San Marcial SE Area, is progressing in
2025 as an emerging high-grade silver district located in southwestern edge of the Sierra Madre Occidental,
Sinaloa, Mexico
. The Plomosas Project, covering 7,823 ha, including the historical Plomosas Underground mine.
benefits from mine infrastructure, road access and existing permits associated with past-producing mining sites. The
district contains intermediate to low-sulfidation epithermal silver and gold mineralization, hosted in hydrothermal
breccias and veins. Recent success in exploration and drilling has delineated wide, high-grade, shallow hydrothermal
breccias in the San Marcial Area, including the SE Area discovery, where step-out drilling is underway in 2025,
aiming for continuous resource growth. At the historical Plomosas Mine, where Grupo Mexico operated the
underground mine from 1985 to 2000, exploration, underground sampling and metallurgical programs are being
conducted to support future decisions regarding the implementation of a Bulk Sampling Test Mining Program
About GR Silver Mining Ltd
.
GR Silver Mining is a Canadian-based,
Mexico
-focused mineral exploration company engaged in cost-effective
silver-gold resource expansion on its 100%-owned assets, located on the eastern edge of the Rosario Mining
District, in the southeast of Sinaloa State,
Mexico
. GR Silver Mining controls 100% of the Plomosas Project,
including the former Plomosas underground mine and wide, high-grade silver mineralized zones at the San Marcial
Area. Recent discoveries in the 78 km² of highly prospective, advanced-stage exploration concessions position the
Company well for resource expansion at the Plomosas Project.
GR Silver Mining Ltd.
Márcio Fonseca, President & CEO
Cautionary Statement Regarding Forward-Looking Information
This press release contains "forward-looking statements" within the meaning of applicable Canadian securities
legislation and information that are based on the beliefs of management and reflect the Company's current
expectations. When used in this press release, the words "estimate", "project", "belief", "anticipate", "intend",
"expect", "plan", "predict", "may" or "should" and the negative of these words or such variations thereon or
comparable terminology are intended to identify forward-looking statements and information.
Such statements and information reflect the current view of the Company. Risks and uncertainties may cause
actual results to differ materially from those contemplated in those forward-looking statements and information. By
their nature, forward-looking statements involve known and unknown risks, uncertainties and other factors which
may cause our actual results, performance or achievements, or other future events, to be materially different from
any future results, performance or achievements expressed or implied by such forward-looking statements.
Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the
policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this press
release.
SOURCE
GR Silver Mining Ltd.
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For further information:
For further information, please contact: Telephone: +1 236-270-2057, Email:
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CNW 05:00e 09-SEP-25