First Mining Further Expands Aiguille Zone at the Duparquet Gold Project as Exploration Drilling Advances
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NEWS RELEASE
First Mining Further Expands Aiguille Zone at the
Duparquet Gold Project as Exploration Drilling Advances
• Aiguille Zone now delineated over 100 m strike length, highlighted by drill hole DUP25-058 returning
1.43 g/t Au over 24.1 m, including 4.56 g/t Au over 4.0 m
• Exploration drilling program continues through the month of September with ~16,000 m completed in
2025 to date
September 8, 2025 – Vancouver, Canada – First Mining Gold Corp. (“First Mining” or the “Company”) (TSX:
FF) (OTCQX: FFMGF) (FRANKFURT: FMG) is pleased to announce additional drilling results from the 202 5
exploration program at its Duparquet Gold Project (“ Duparquet Project” or the “ Project”) located in the
Abitibi region of Quebec, Canada. The Company has been actively drilling at the Duparquet Project and has
completed ~16,000 m of drilling since March 2025, with a focus on advancing key resource expansion targets.
Remaining assay results from the 2025 program are pending, and the Company will provide further updates
as results are received and interpreted.
Highlights from the latest drilling include the continued advancement of the Aiguille discovery zone. Drill hole
DUP25-058 returned 1.43 g/t Au over 24.1 m, including 4.56 g/t Au over 4 .0 m, further extending the target
eastward along strike. Originally discovered in 2024, the Aiguille Zone returned 8.99 g/t Au over 3.1 m in
DUP24-044 (see news release dated January 20, 2025). With the latest results, the Aiguille target has now
been delineated over an approximate strike length of 100 m. The zone remains open, and follow -up drilling
will focus on further defining both its vertical and strike extents.
“Our e xploration teams continue to build on our drilling success at Duparquet with the advancement of
priority target areas proximal to the existing mineral resource, aimed at bolstering continuity and endowment
in support of our development vision,” stated Dan Wilton, CEO of First Mining. “With a highly productive drill
program to date, we look forward to further strong results-driven updates on the Project.”
Drilling at the Valentre target has continued in 2025, with recent assay results returning 2.80 g/t Au over 3.25
m, including 4.93 g/t Au over 1.75 m in drill hole DUP25-057. Ongoing drilling at the Central Duparquet -
Valentre-Dumico (“CVD”) target, together with the adjacent Aiguille and Miroir targets, continues to reinforce
the area as a n emerging resource growth centre that could have synergies with mining development
scenarios. Furthermore, with the expansion of the Aiguille and Miroir targets, the Company has demonstrated
a favourable area with a concentration of gold mineralization spanning 1.5 km by 0.5 km (See Figure 1).
The latest completed holes total 1,053 metres of the 2025 program and assay highlights are shown in Table
1, with a full list of assays returned in Table 2 and collar details in Table 3.
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Table 1: Selected Significant Drill Intercepts, 2025 Program – Aiguille and Valentre Targets
Hole ID From
(m) To (m) Length (m) Grade (Au g/t) Target
DUP25-057 208.15 211.4 3.25 2.80 Valentre
DUP25-057 inc. 208.15 209.9 1.75 4.93 Valentre
DUP25-058 376.9 401.0 24.1 1.43 Aiguille
DUP25-058 inc. 395.0 399.0 4.0 4.56 Aiguille
Figure 1: Plan view of the CVD, Aiguille, and Miroir target areas.
Duparquet 2025 Exploration Program Updates
Exploration activities at the Duparquet Project continue to advance, with ~16,000 m drilled in 2025 to date.
Drilling has been strategically focused on key resource expansion targets including CVD, Miroir, Aiguille ,
North Zone, South Zone, and the newly discovered Minuit Zone, where programs are aimed at building on the
Project’s strong growth potential (Figure 2). In parallel, regional field programs are progressing to refine and
advance additional targets toward future drill readiness.
Figure 2: Plan view map of Duparquet geology and mineral resource with main targets around the Project core area.
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Additional Details on the Aiguille and CVD Targets
Aiguille
The 2025 Aiguille drilling program is focused on expanding the extent of mineralization along strike and plunge
of the two discovery holes completed in 2024. Recent drilling returned 1.43 g/t Au over 24.1 m, including 4.56
g/t Au over 4.0 m, in drill hole DUP25 -058 (Figure 3). Mineralization is hosted within alternating brecciated
and altered basalt, argillite, and syenite units , with up to 5% very fine -grained and medium -grained pyrite.
Mineralization is consistent along interpreted east-west trending D2 structures, which are characterized by
intense brecciation and shearing. Drilling to date has extended the mineralized strike length at Aiguille to
approximately 100 m, and the zone remains open both at depth and along strike, particularly toward surface
and eastward (Figure 4).
Figure 3: Cross section and plan view of the recently completed drilling at the Aiguille Zone, highlighting select drill holes and
significant intercepts downhole. The cross section is looking west.
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Figure 4: Aiguille plan view and north-looking long section, highlighting recent drill results and outlining future drill targets.
Central Duparquet – Valentre - Dumico
Drilling at the CVD target area has been further advanced with drill holes DUP25-055 and DUP25-057 (Table
2). Notably, DUP25-057 returned 2.80 g/t Au over 3.25 m , including 4.93 g/t Au over 1.75 m . Mineralized
intersections are hosted in brecciated silica-altered basalt or syenite, containing up to 5% very fine -grained
disseminated pyrite.
The exploration strategy at the CVD target is focused on expanding the mineralized footprint and
demonstrating continuity along strike and at depth . Results will be incorporated into an updated 3D
geological model to guide future drilling programs and support the potential inclusion of the CVD target in
future mineral resource estimates (Figure 5).
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Figure 5: Long section view of the CVD area highlighting the drill density and significant Au intercepts.
Table 2: Latest Assay Results from 2025 Drill Program
Hole ID From (m) To (m) Length (m) Grade (Au g/t) Target
DUP25-055 28.25 29.0 0.75 0.80 Dumico
DUP25-055 47.3 47.8 0.5 1.86 Dumico
DUP25-055 53.45 54.95 1.5 1.49 Dumico
DUP25-055 130.3 138.75 8.45 0.94 Valentre
DUP25-055 214.3 216.2 1.9 0.61 Valentre
DUP25-055 220.15 225.0 4.85 0.55 Valentre
DUP25-055 227.7 229.0 1.3 0.53 Valentre
DUP25-055 234.5 235.25 0.75 0.49 Valentre
DUP25-055 241.8 242.3 0.5 0.78 Valentre
DUP25-057 57.5 59.0 1.5 1.45 Valentre
DUP25-057 73.5 75.0 1.5 0.60 Valentre
DUP25-057 143.5 144.1 0.6 0.47 Valentre
DUP25-057 145.55 147.1 1.55 0.57 Valentre
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Hole ID From (m) To (m) Length (m) Grade (Au g/t) Target
DUP25-057 203.0 204.0 1.0 0.40 Valentre
DUP25-057 208.15 211.4 3.25 2.80 Valentre
DUP25-057 inc. 208.15 209.9 1.75 4.93 Valentre
DUP25-057 227.6 228.35 0.75 0.76 Valentre
DUP25-057 229.65 230.45 0.8 0.48 Valentre
DUP25-057 240.0 241.0 1.0 4.12 Valentre
DUP25-057 263.25 264.15 0.9 0.69 Valentre
DUP25-057 280.0 283.7 3.7 1.06 Valentre
DUP25-057 297.5 298.0 0.5 1.74 Valentre
DUP25-058 59.0 60.0 1.0 2.43 Central Duparquet
DUP25-058 94.6 95.3 0.7 0.59 Central Duparquet
DUP25-058 99.0 100.0 1.0 1.12 Central Duparquet
DUP25-058 106.5 108.0 1.5 1.39 Central Duparquet
DUP25-058 152.95 153.45 0.5 2.48 Central Duparquet
DUP25-058 160.0 164.55 4.55 0.63 Central Duparquet
DUP25-058 367.45 369.0 1.55 2.21 Aiguille
DUP25-058 376.9 401.0 24.1 1.43 Aiguille
DUP25-058 inc. 395.0 399.0 4.0 4.56 Aiguille
*Reported intervals are drilled core lengths (true widths are estimated at 75-85% of the core length interval; assay values
are uncut)
Table 3: 2025 Drill Hole Locations - Minuit, Aiguille, Valentre Zones
Hole ID Azimuth (°) Dip (°) Length (m) Easting Northing
DUP25-055 180 -53 276 633521 5373938
DUP25-057 175 -57 327 633411 5373966
DUP25-058 179 -57 450 633346 5373897
Note: Collar coordinates in UTM NAD 83 z17
About the Duparquet Gold Project
The Duparquet Project is geologically situated in the southern part of the Abitibi Greenstone Belt and is
geographically located approximately 50 km north of the city of Rouyn-Noranda. The Project benefits from
easy access and proximity to an existing workforce and infrastructure, including road, rail and hydroelectric
grid power. The Duparquet Project currently hosts a n NI 43-101 compliant gold resource of 3.4 4 million
ounces in the Measured & Indicated category, grading 1.55 g/t Au, and an additional 2.64 million ounces in
the Inferred category, grading 1.62 g/t Au. First Mining completed a Preliminary Economic Assessment 1
(“PEA”) on the Project in 2023.
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The Duparquet Project totals approximately 5,800 hectares focused on an area of 19 km of strike length along
the prolific Destor-Porcupine Fault Zone, along with numerous mineralized splays and influential secondary
lineaments. The Duparquet Project includes the past-producing Beattie, Donchester and Duquesne mines as
well as the Central Duparquet, Dumico and Pitt Gold deposits.
1 Further details on the Duparquet PEA can be found in the technical report entitled “NI 43 -101 Technical Report: Preliminary
Economic Assessment, Duparquet Gold Project, Quebec, Canada” dated October 20, 2023, which was prepared for First Mining by G
Mining Services Inc. in accordance with NI 43-101 and is available under First Mining’s SEDAR+ profile at www.sedarplus.ca
Analytical Laboratory and QA/QC Procedures
All sampling completed by First Mining within its exploration programs is subject to a Company standard of
internal quality control and quality assurance (QA/QC) programs which include the insertion of certified
reference materials, blank materials and a level of duplicate analysis. Core samples from the 2025 drilling
program at Duparquet were sent to AGAT Laboratories, with sample preparation in Val d’Or, Quebec and
analysis in Thunder Bay, Ontario, where they were processed for gold analysis by 50 gram fire assay with an
atomic absorption finish. Samples from selected holes were sent to AGAT Laboratories in Calgary, Alberta ,
for multi-element analysis (including silver) by inductively coupled plasma (ICP) method with a four acid
digest. AGAT Laboratories systems conform to requirements of ISO/IEC Standard 17025 guidelines and
meets assay requirements outlined for NI 43-101.
Qualified Person
James Maxwell, P.Geo., VP, Exploration and Project Operations for First Mining, is a “Qualified Person” for
the purposes of NI 43-101 Standards of Disclosure for Mineral Projects and has reviewed and approved the
scientific and technical disclosure contained in this news release.
About First Mining Gold Corp.
First Mining is a gold developer advancing two of the largest gold projects in Canada, the Springpole Gold
Project in northwestern Ontario, where we have commenced a Feasibility Study and permitting activities are
on-going with a final Environmental Impact Statement / Environmental Assessment for the project submitted
in November 2024, and the Duparquet Gold Project in Quebec, a PEA-stage development project located on
the Destor-Porcupine Fault Zone in the prolific Abitibi region. First Mining also owns the Cameron Gold Project
in Ontario and a 30% project interest in the Pickle Crow Gold Project.
First Mining was established in 2015 by Mr. Keith Neumeyer, founding President and CEO of First Majestic
Silver Corp.
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ON BEHALF OF FIRST MINING GOLD CORP.
Daniel W. Wilton
Chief Executive Officer and Director
For further information, please contact:
Toll Free: 1 844 306 8827 | Email: [email protected]
Paul Morris | Director, Investor Relations | Email: [email protected]
Cautionary Note Regarding Forward-Looking Statements
This news release includes certain “forward -looking information” and “forward -looking statements” (collectively
“forward-looking statements”) within the meaning of applicable Canadian and United States securities legislation
including the United States Private Securities Litigation Reform Act of 1995. These forward-looking statements are made
as of the date of this news release. Forward -looking statements are frequently, but not always, identified by words such
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Forward-looking statements in this news release relate to future events or future performance and reflect current
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Mining's or its co nsultants' current beliefs as well as various assumptions made by them and information currently
available to them. There can be no assurance that such statements will prove to be accurate, and actual results and
future events could differ materially from those anticipated in such statements. Forward -looking statements reflect the
beliefs, opinions and projections on the date the statements are made and are based upon a number of assumptions
and estimates that, while considered reasonable by the respective parties, are inherently subject to significant business,
economic, competitive, political and social uncertainties and contingencies. Such factors include, without limitation the
Company’s business, operations and financial condition potentially being mate rially adversely affected by the outbreak
of epidemics, pandemics or other health crises, and by reactions by government and private actors to such outbreaks;
risks to employee health and safety as a result of the outbreak of epidemics, pandemics or other health crises, that may
result in a slowdown or temporary suspension of operations at some or all of the Company's mineral properties as well
as its head office; fluctuations in the spot and forward price of gold, silver, base metals or certain other commo dities;
fluctuations in the currency markets (such as the Canadian dollar versus the U.S. dollar); changes in national and local
government, legislation, taxation, controls, regulations and political or economic developments; risks and hazards
associated w ith the business of mineral exploration, development and mining (including environmental hazards,
industrial accidents, unusual or unexpected formations, pressures, cave -ins and flooding); the presence of laws and
regulations that may impose restrictions o n mining; employee relations; relationships with and claims by local
communities, indigenous populations and other stakeholders; availability and increasing costs associated with mining
inputs and labour; the speculative nature of mineral exploration and development; title to properties.; and the additional
risks described in the Company’s Annual Information Form for the year ended December 31, 202 4 filed with the
Canadian securities regulatory authorities under the Company’s SEDAR+ profile at www.sedarplus .ca, and in the
Company’s Annual Report on Form 40-F filed with the SEC on EDGAR.
First Mining cautions that the foregoing list of factors that may affect future results is not exhaustive. When relying on our
forward-looking statements to make decisions with respect to First Mining, investors and others should carefully
consider the for egoing factors and other uncertainties and potential events. First Mining does not undertake to update
any forward-looking statement, whether written or oral, that may be made from time to time by the Company or on our
behalf, except as required by law.
Cautionary Note to United States Investors