First Mining Confirms Mineralization Expansion Opportunity within Existing Springpole Gold Project Pit Design at its East Extension Target
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NEWS RELEASE
First Mining Confirms Mineralization Expansion Opportunity within Existing
Springpole Gold Project Pit Design at its East Extension Target
February 12, 2025 – Vancouver, Canada – First Mining Gold Corp. (“First Mining” or the “Company”) (T SX:
FF) (OTCQX: FFMGF) (FRANKFURT: FMG) is pleased to announce final drilling results from the 2024 East
Extension Phase 1 diamond drilling program at its Springpole Gold Project (“Springpole Project ” or the
“Project ”) located in northwestern Ontario, Canada. In the fall of 2024, First Mining completed a five-hol e,
2,293 m exploration drilling campaign targeting resource growth opportunities with continuity towards the
east of the main Springpole Project mineral resource.
Highlights from the East Extension Phase 1 drilling campaign include drill holes SP24-011, SP24-009, and
previously reported SP24-007, all of which returned favourable gold and silver grades that are representative
of the established resource grade profile. The most northerly hole of the program, SP24 -011, returned two
broad mineralization intervals including 0.75 g/t Au and 3.30 g/t Ag over 134.2 m, and 0.67 g/t Au and 12.79
g/t Ag over 105.4 m. These results confirm an opportunity for direct mineralization expansion in continuity to
the current open pit profile which remains open for further exploration.
The East Extension Phase 1 drilling program was successful in returning significant widths of continuous
mineralization in an underexplored area of the Springpole Project located within the current Pre-Feasibility
Study (“PFS”) open-pit development footprint. The highlights from the drill program demonstrate significant
upside potential to further extend mineralization with continuity and provide the opportunity to reclassify
material that is currently classified as “waste” into “ore” in the proposed run of mine (“ROM”) pit design. This
could potentially reduce the strip ratio and increase processed ore tonnes.
“Our advancements continue to demonstrate the Springpole Project as a robust gold and silver resource
development opportunity within an important mining region of Ontario.” stated Dan Wilton, CEO of First
Mining. “The results from the East Extension are especially encouraging as they demonstrate the presence of
additional gold and silver mineralization inside the existing mine footprint, potentially converting waste to
ore. As we continue to advance through the Environmental Assessment proce ss, we believe that the
Springpole Project will be a major economic and sustainable infrastructure driver for Northwestern Ontar io
communities.”
The focus of upcoming exploration activities will be centred around integrating the latest drill hole results into
an updated 3D model and delineating further plans to unlock opportunities for the East Extension target as
well as near open pit brownfields exploration targets. The East Extension target is located at the southeaster n
boundary of the current mineral resource and proposed open pit wall design. A plan map of the East Extension
Phase 1 drill holes and target area is presented in Figure 1, and corresponding assay highlights are presented
in Table 1, with full assay results listed in Table 2 and drill hole locations in Table 3.
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Figure 1: Plan View of the East Extension Target Phase 1 Drill Program
Table 1: Significant Drill Intercepts , 2024 Phase 1 Drill Program – East Extension Target, Springpole
Project
Hole ID From (m) To (m) Length
(m) Grade (Au g/t) Grade (Ag g/t)
SP24-009 74.2 94.0 19.8 0.38 1.69
SP24-009 118.5 136.0 17.5 1.01 10.41
SP24-009 inc. 121.6 122.25 0.65 9.30 184.00
SP24-009 273.0 297.7 24.7 0.89 6.95
SP24-009 inc. 280.95 287.8 6.85 1.66 13.45
SP24-009 315.2 337.0 21.8 0.44 4.34
SP24-011 23.5 157.7 134.2 0.75 3.30
SP24-011 inc. 108.0 120.4 12.4 1.01 6.24
SP24-011 170.65 185.7 15.05 0.51 2.68
SP24-011 189.1 213.3 24.2 0.79 7.41
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Hole ID From (m) To (m) Length
(m) Grade (Au g/t) Grade (Ag g/t)
SP24-011 217.5 256.3 38.8 0.44 3.91
SP24-011 265.1 370.5 105.4 0.67 12.79
SP24-011 inc. 265.1 278.0 12.9 1.00 21.18
SP24-011 and inc. 352.2 370.5 18.3 1.12 16.33
SP24-011 411.5 416.0 4.5 1.84 60.90
SP24-011 inc. 411.5 412.2 0.7 7.22 263.00
*Reported intervals are drilled core lengths (true widths are estimated at 75-85% of the core length interval, assay va lue s
are uncut)
Additional Details on the Springpole East Extension Phase 1 Drilling Program
The East Extension Phase 1 drilling was focused on a 150 m strike area along the southeastern edge of the
current mineral resource (Figure 1). First Mining identified the East Extension target through advanced 3D
target modelling, which highlighted a theorized easterly curve to the southern end of the main Portage Zone.
Data supporting the updated target model includes Televiewer foliation data, geophysical data, historical dril l
hole data, geological mapping, as well as data from an advanced structural mapping campaign. Advanced
modelling identified key stratigraphical features at the Springpole resource that include d megacrystic
trachyte units that strike parallel to subparallel along the main Springpole resource. Further defining the key
stratigraphic units that are parallel with the main Springpole resource will aid in defining follow -up East
Extension drill hole targets for additional resource growth potential.
Drill holes SP24-007 (see November 19, 2024 news release ), SP24-009, and SP24-011 tested the Phase 1
target shape . Drill holes SP24 -008 and SP24 -010 were designed to test a potential extension of the
mineralization and key stratigraphic units towards the northeast of the Phase 1 target shape.
Mineralization in drill holes SP24-007, SP24-009, and SP24-011 is hosted within a silicified and sericitized
intermediate volcanic/breccia unit, and medium to coarse-grained trachyte units. Mineralization consists of
2-5% disseminated and fracture-controlled pyrite occurring coincident with sheared and brecciated
structural zones. Minor amounts of galena, sphalerite, chalcopyrite, and tellurides are hosted within quartz
carbonate veining that comprise s 1-5% of the core. Higher grade intervals (>3 g/t Au) are associated with
mineralized brecciated quartz carbonate veining with up to 10% fine -grained disseminated pyrite.
Drill holes SP24-008 and SP24-010 intersected key stratigraphic units consisting of megacrystic trachyte and
heterolithic breccia. Mineralization intersected in these holes is hosted within carbonate- and silica-altered
andesite, trachyte, and heterolithic breccia units , with up to 2% disseminated fine -grained pyrite
mineralization.
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Figure 2: East Extension drill hole SP24-009 targeting the potential mineralization continuity along the southeastern a re a
of the current mineral resource. Assay results are highlighted downhole . The long section is looking northwest .
Figure 3: East Extension drill hole SP24-011 targeting the potential mineralization continuity along the southeastern a re a
of the current mineral resource. Assay results are highlighted downhole. The long section is looking northwest .
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The Springpole East Extension Phase 1 drilling campaign intersected significant widths of continuous
mineralization in all holes and validated the exploration target model with further delineation of key
stratigraphical units defin ing forward exploration opportunities. The East Extension Target remains open
along strike towards the south and southeast of the main Portage Zone and has the potential to add
meaningful mineralization extension or additional zones within or near the current PFS proposed open pit
shell, as illustrated in Figure 4.
Figure 4: Left: Plan view of Springpole East Extension Target area overlain with First Vertical Derivative airborne magne tic s
survey. Right: Plan view of the Springpole East Extension Target area showing new drilling, historical drilling, and follow-
up exploration drill hole target locations .
Springpole Project – Future Exploration Programs
A portion of the 2025 Springpole exploration program will be focused o n reviewing, integrating and
interpreting the results returned from the 2024 Springpole East Extension Phase 1 drilling program. Next steps
include incorporating the results into a 3D model update and the proposal of definition drilling that supports
a potential for resource conversion. Further work will be completed in advancing future additional brownfield
exploration opportunities for the Project.
Table 2: Remaining 2024 Phase 1 Drill Results - East Extension, Springpole Project
Hole ID From
(m) To (m) Length (m) Grade (Au g/t) Grade (Ag g/t)
SP24 -008 349.0 350.0 1.0 0.35 2.17
SP24 -008 371.0 373.0 2.0 0.33 2.85
SP24 -008 392.0 393.0 1.0 0.32 2.18
SP24 -009 8.0 8.75 0.75 0.57 4.66
SP24 -009 38.3 45.1 6.8 0.44 3.49
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Hole ID From
(m) To (m) Length (m) Grade (Au g/t) Grade (Ag g/t)
SP24 -009 inc. 42.6 43.1 0.5 2.41 28.50
SP24 -009 56.0 57.0 1.0 0.67 5.88
SP24 -009 64.4 69.4 5.0 0.42 1.89
SP24-009 74.2 94.0 19.8 0.38 1.69
SP24 -009 105.0 114.5 9.5 0.33 1.72
SP24-009 118.5 136.0 17.5 1.01 10.41
SP24-009 inc. 121.6 122.25 0.65 9.30 184.00
SP24 -009 139.7 150.0 10.3 0.48 1.79
SP24 -009 165.8 166.8 1.0 0.32 1.56
SP24 -009 172.8 174.8 2.0 0.43 1.24
SP24 -009 186.0 187.0 1.0 0.56 0.50
SP24 -009 207.0 211.0 4.0 0.22 0.83
SP24 -009 216.0 221.0 5.0 0.31 1.53
SP24 -009 226.0 228.0 2.0 0.33 2.16
SP24 -009 231.0 232.0 1.0 0.44 2.21
SP24 -009 234.7 235.7 1.0 0.36 1.10
SP24 -009 238.7 240.7 2.0 0.41 6.75
SP24-009 273.0 297.7 24.7 0.89 6.95
SP24-009 inc. 280.95 287.8 6.85 1.66 13.45
SP24 -009 301.7 305.7 4.0 0.51 3.12
SP24 -009 308.7 310.7 2.0 0.45 4.28
SP24-009 315.2 337.0 21.8 0.44 4.34
SP24 -009 342.0 344.0 2.0 0.68 6.88
SP24 -009 354.4 355.4 1.0 0.30 4.62
SP24 -009 374.9 375.45 0.55 0.47 0.30
SP24 -010 4.1 5.0 0.9 0.31 0.32
SP24 -010 61.5 62.3 0.8 0.40 1.90
SP24 -010 75.6 77.0 1.4 0.57 6.72
SP24 -010 141.5 142.5 1.0 0.55 2.55
SP24 -010 150.7 151.35 0.65 0.43 8.62
SP24 -010 204.0 205.0 1.0 0.30 3.10
SP24 -010 337.9 339.0 1.1 1.72 37.77
SP24 -010 371.9 374.0 2.1 0.55 1.51
SP24-011 23.5 157.7 134.2 0.75 3.30
SP24-011 inc. 108.0 120.4 12.4 1.01 6.24
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Hole ID From
(m) To (m) Length (m) Grade (Au g/t) Grade (Ag g/t)
SP24-011 170.65 185.7 15.05 0.51 2.68
SP24-011 189.1 213.3 24.2 0.79 7.41
SP24-011 217.5 256.3 38.8 0.44 3.91
SP24 -011 261.9 262.75 0.85 0.38 6.98
SP24-011 265.1 370.5 105.4 0.67 12.79
SP24-011 inc. 265.1 278.0 12.9 1.00 21.18
SP24-011 and inc. 352.2 370.5 18.3 1.12 16.33
SP24-011 411.5 416.0 4.5 1.84 60.90
SP24-011 inc. 411.5 412.2 0.7 7.22 263.00
SP24-011 422.0 423.0 1.0 0.32 0.73
*Reported intervals are drilled core lengths (true widths are estimated at 75-85% of the core length interval, assay va lue s
are uncut)
Table 3: Remaining Phase 1 Drill Hole Locations, Springpole East Extension Target
Hole ID Azimuth (°) Dip (°) Length (m) Easting Northing
SP24-008 220 -70 499.7 549993 5693643
SP24-009 220 -70 443 549956 5693571
SP24-010 150 -70 449 549976 5693662
SP24-011 220 -70 452 549883 5693649
Note: Collar coordinates in UTM NAD 83 z15
Springpole Gold Project
The Springpole Project hosts a significant gold and silver resource in a bulk tonnage, low-grade porphyry to
epithermal-style deposit that is associated with the emplacement of an alkali trachyte intrusive complex.
Mineralization styles include disseminated gold -silver-sulphide mineralization that is related to multiple
phases of a trachyte porphyry complex and a number of associated breccias dykes and sills. The current
mineral resource for the Springpole Project comprises an Indicated Resource of 151 Mt at 0.94 g/t Au and 5.0
g/t Ag, totalling 4.6 million ounces of gold and 24.3 million ounces of silver, and an Inferred Resource of 16
Mt at 0.54 g/t Au and 2.8 g/t Ag, totalling 0.3 million ounces of gold and 1.4 million ounces of silver, including
Probable Mineral Reserves of 121.6 Mt at 0.97 g/t Au and 5.23 g/t Ag totalling 3.8 million ounces gold and 20.5
million ounces of silver.
Further details on the Springpole Project mineral resource and reserves can be found in the technical report
entitled “NI 43 -101 Technical Report and Pre -Feasibility Study on the Springpole Gold Project, Ontario,
Canada”, which was prepared for First Mining by AGP Mining Consultants Inc. (“ AGP”) in accordance with
National Instrument 43-101 Standards of Disclosure for Mineral Projects (“NI 43-101”) and has an effective
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date of January 20, 2021. First Mining has now commenced activities to support a Feasibility Study on the
Project.
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 2024 drilling
program at the Springpole Project were sent to AGAT Laboratories, with sample preparation and analysis in
Thunder Bay , Ontario, where they were processed for gold analysis by 50 gram fire assay with an atomic
absorption finish . Samples were also sent to AGAT Laboratories in Calgary, Alberta , for multi-element
analysis (including silver) by inductively coupled plasma (ICP) method with an aqua regia digest. AGAT
Laboratories systems conform to requirements of ISO/IEC Standard 17025 guidelines and meets assay
requirements outlined for NI 43-101.
Qualified Person
Hazel Mullin, P.Geo., Director, Data Management and Technical Services of First Mining, is a “Qualified
Person” for the purposes of NI 43-101 Standards of Disclosure for Mineral Projects, and she 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 ar e
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 portfolio of gold project interests including the Pickle Crow Gold Project (being advanced in
partnership with Firefly Metals Ltd.) and the Hope Brook Gold Project (being advanced in partnership with Big
Ridge Gold Corp.).
First Mining was established in 2015 by Mr. Keith Neumeyer, founding President and CEO of First Majestic
Silver Corp.
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” (collective ly
“forward-looking statements”) within the meaning of applicable Canadian and United States securities legisla tion