Thunder Gold Phase Three Drill Results Demonstrate Broad, Consistent Mineralization at Tower Mountain
Thunder Gold Phase Three Drill Results
Demonstrate Broad, Consistent Mineralization
at Tower Mountain
Thunder Bay, Ontario--(Newsfile Corp. - December 8, 2025) - Thunder Gold Corp. (TSXV: TGOL) (FSE:
Z25) (OTCQB: TGOLF) ("
Thunder Gold
" or the "
Company
") is pleased to announce complete results
for the Phase Three drill program at its 100%-owned, 2,500-hectare, Tower Mountain Gold Property,
located 40 kilometres west of the port city of Thunder Bay, Ontario. Phase Three drilling clearly
demonstrates the opportunity to rapidly increase the mineralization footprint west of the Tower Mountain
Intrusive Complex ("
TMIC
") and demonstrate that this area offers standalone potential for defining a
consistent and scalable gold system. Phase Three results mark another step forward in unlocking the
potential of this project.
Highlights:
All seven holes testing the 800-metre-long Bench-3738-Ellen breccia channel (west of the
TMIC contact) intersected broad, consistent intervals of gold mineralization as predicted.
The initial hole testing the South Bench Target extended the previously identified
mineralization and identified a new zone of near surface gold mineralization.
A shallow hole, testing a new target identified by soil and rock sampling this summer,
intersected significant gold mineralization from the collar to a depth of 30 metres.
Results at the 3738 Target indicate the target breccia channel measures 150 to 200
metres (true width), returns steady, consistent gold grades and remains open along strike
and down dip.
The Bench-3738-Ellen trend measures 800 metres x 200 metres x 300 metres, and only
30% of this volume is drill-tested representing a compelling, immediately accessible, fully-
permitted, low-cost drill target.
Significant gaps remain untested along the breccia channel offering immediate, low-cost
opportunities to expand the near surface resource potential west of the TMIC.
Additional resource upside lies around the remaining 6,000-metre circumference of the
TMIC.
All necessary exploration permits are valid through 2028.
Wes Hanson, President and CEO, states,
"Phase Three drilling at the 3738 Target delivered exactly
what we set out to demonstrate - precision testing of key gaps in our exploration model delivering
tangible results that reinforce our confidence in the scale and continuity of mineralization west of the
TMIC contact. We completed seven drill holes at the 3738 Target (1,633 metres). All seven holes
intersected mineralization, at expected grades, exactly where predicted by our exploration model.
These latest results will be included in the Mineral Resource Estimate being prepared by Micon
International Ltd.
"We believe Tower Mountain can be advanced more efficiently than any other project in the
Shebandowan Greenstone Belt. Our recent drill results confirm ample opportunities to increase the
resource potential. Our proximity to Thunder Bay and built infrastructure results in one of the lowest
discovery costs in Canada. Internal modeling indicates that the current, drill-defined mineralization
west of the TMIC can be extracted without impacting existing or planned infrastructure routes.
"Our 2025 drilling has delivered on all our objectives. We demonstrated near term resource growth
potential west of the TMIC, within the historical drill pattern, offering immediate, short-term, low-cost
resource growth opportunity. We demonstrated long-term resource growth potential elsewhere around
the 6,000-metre TMIC circumference. We maintained capital efficiency, directing two thirds of every
dollar raised to exploration at our cornerstone project. Our 2025 results validate the strength and
predictability of our exploration model - providing investors with increasing confidence in the
scalability of the Tower Mountain project."
Highlights
At the
3738-Target
, drilling expanded the mineralized footprint with all seven (7) holes returning
significant intercepts. Standout results include:
1.83 g/t Au over 18.0 metres within 0.47 g/t Au over
333.0 metres (TM25-180 extension)
,
0.53 g/t Au over 181.5 metres (TM25-181 extension), 1.05 g/t
Au over 25.5 metres (TM25-186), 1.98 g/t Au over 13.5 metres (TM25-187), 0.42 g/t over 271.5
metres (TM25-188), 0.698 g/t Au over 37.5 metres (TM25-189)
.
At the
H Target
(northern TMIC contact) three (3) of three (3) holes intersected mineralization including
0.51 g/t Au over 6.00 metres (TM25-185)
.
A single, shallow hole testing the southwest extension of the
A-Target
, intersected
1.293 g/t Au over
10.5 metres (TM25-190)
. This hole tested a soil geochemistry anomaly and surface prospecting
samples that returned anomalous gold results from the summer field program.
The first hole targeting the
South Bench Target
intersected
0.666 g/t Au over 25.5 metres
, 21.0
metres from the collar.
Phase Three drilling commenced October 1, 2025, and continued through November 7, 2025. Twelve
(12) holes (2,164 metres) were completed at an estimated all-in drilling cost of less than C$300 per
metre.
Figure 1.0 is a plan view of the Phase Three drilling showing the location of the completed holes.
3738-Target
Seven (7) holes (1,632 metres) were completed at the 3738 Target during Phase 3. The holes tested an
interpreted 400 metres of strike length from hole TM25-189 through to hole TM25-191. Results suggest
continuous mineralization persists between the Bench and Ellen Targets. The positive drill results shall
be incorporated into the drill database that informs on the Mineral Resource Estimate being prepared by
Micon International.
Table 1.0 summarizes the results of the 3738 drill holes. The Table includes the previously reported
portions of holes TM25-180 and TM25-181, from 0 to 252.0 metres. The extension of both holes
intersected significant mineralization producing results that vary from the those reported for the Phase
Two drill program.
Figure 2.0 is a cross-section of holes TM25-180, TM25-181 and TM25-186 drill holes. The location of
the section is identified on Figure 1.0 as SECTION 5377650 N.
FIGURE 1.0 -Phase Three 2025 Drill Hole Location Plan
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TABLE 1.0 - 3738-Target Results - Phase Three Drill Program, Dec. 2025
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FIGURE 2.0 - 3738-Target - Section 5377650 N (Looking North; 25-metre projection window)
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H Target
Three (3) holes, (249 metres) were completed at the H-Target, 25 metres east, west and below hole
TM25-182 (Phase Two) that intersected
0.73 g/t Au over 6.0 metres
. All three holes intersected
mineralization above a 0.10 g/t Au cut-off grade.
TM25-185,
25 metres northwest of TM25-182,
intersected 0.505 g/t Au over 6.00 metres
suggesting a relative flat lying target.
TABLE 3.0 - H-Target Results - Tower Mountain Property, Phase Three Drill Program, Dec. 2025
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Intervals in Table 3.0 are reported as core length not True Width. True Width cannot be estimated at this time due to insufficient data.
NEW West Contact Targets
TM25-190 was a shallow hole testing a cluster of elevated rock samples collected 150 metres south of
the A Target (Reference Figure 1.0). The hole collared in mineralization, intersecting
0.661 g/t Au over
30.0 metres including 1.293 g/t Au over 10.5 metres
.
TM25-192, the final hole of Phase Three, was drilled at the south end of the Bench Target, approximately
25 metres south and 50 metres below hole
TM11-82 (0.718 g/t Au over 22.0 metres)
, targeting another
gap in the Company's exploration model.
TM25-192 intersected 0.641 g/t Au over 12.0 metres
vertically below the TM11-82 intersection. It also intersected
0.666 g/t Au over 25.5 metres
near
surface, a previously unrecognized zone of mineralization that is open to the southeast and down-dip.
(Reference Figures 1.0 & 3.0).
TABLE 3.0 - New Target Results - Tower Mountain Property, Phase Three Drill Program, Dec.
2025
HOLE ID
CUT-OFF GRADE
(Au g/t)
FROM
(m)
TO
(m)
INTERVAL
(m)
TRUE WIDTH
(m)
Au
g/t
TM25-190
0.10
7.50
30.00
22.50
UNKNOWN
0.661
includes
0.30
7.50
18.00
10.50
UNKNOWN
1.293
TM25-192
0.10
3.00
252.00
249.00
174.30
0.311
includes
0.30
21.00
46.50
25.50
17.85
0.666
and
0.30
93.00
100.50
7.50
5.25
0.571
and
0.30
124.50
186.00
61.50
43.05
0.476
includes
0.30
139.50
151.50
12.00
8.40
0.641
and
0.30
175.50
184.50
9.00
6.30
1.075
Intervals for TM25-190 in Table 3.0 are reported as core length not True Width. True Width cannot be estimated at this time due to insufficient
data.
Overall, Phase Three successfully demonstrated ample opportunities to increase the mineralization
footprint exist within the historical drill pattern as postulated. Drilling around the perimeter of the TMIC is
fully permitted through 2028. The western contact area is immediately accessible and offers over 40,000
metres of drilling soon to be quantified in a current, independent, Mineral Resource Estimate. At current
gold prices, the Company considers the west contact, consisting of the UV, Bench, Ellen, A and 3738
Targets, to be a compelling exploration target that offers opportunity for rapid resource growth. This,
combined with the unmatched access to fully built, publicly maintained infrastructure, allows for more
rapid project advancement than many other large-tonnage, low-grade projects.
FIGURE 3.0 - South Bench-Target - Section 1000 (Looking SE
25-metre projection limit)
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Care and Control Procedures
Diamond drilling is conducted by qualified contractors independent of the Company. NQ diameter drill
core is recovered by the independent contractor and placed in core boxes. The end of each drilled
interval is recorded on wooden blocks and placed at the end of each drilled interval in the core box.
Once the core box is full, the Hole ID and box number are recorded on each box. A lid is positioned over
each box by the independent contractor. The hole number and box number are recorded on the lid. The
lid is sealed to the core box using packing tape to prevent core spillage. The boxes, with lids, are
stacked at the drill until the end of the shift. At shift change, all boxes are transported from the drill site to
a marshalling area where they are transferred into the custody of the drill foreman. The drill foreman
delivers the shift production to the Company's core logging facility where it is received by the Company's
geological team. Here the core lids are removed, the boxes are organized by hole number and box
number. The core is logged by a Technician, under the supervision of the Company's QP. The
Technician rotates the core, washes the core, measures the core into 1.0 metre intervals recording the
downhole depth physically on the drill core.
The Technician then logs the core for recovery and rock
quality, and completes magnetic susceptibility readings at the previously recorded metre intervals. The
Technician records the hole number and starting and ending meterage of each box. All information
collected by the Technician is recorded digitally in the Company's database.
A contract geologist, under the supervision of the Company's QP, completes a geological log of each
hole recording lithology, alteration, mineralization, veining and structure. The geologist identifies the
individual samples for each hole. A standard 1.5 metre sample interval is used. The geologist marks the
core with start, stop and cut lines for the sample technician. The geologist places a sample tag at the
start of each sample interval. The geologist records the interval start and stop depth in the tag book and
determines where to insert Certified Reference Materials ("
CRM
") into the sample stream. CRM
includes both Standards and Blanks. Typically, both are inserted alternately every tenth sample, at a
number ending in (0). Multiple standards are utilized, each at different grades between from 0.20 to
10.00 g/t Au.
The geologist transfers each hole to the sample Technician on completion of logging and sampling. The
Technician physically attaches each tag to the core box prior to sampling. The Technician labels 6-mil
plastic sample bags with sequential core numbers from the tag book using a black felt marker. The
sample Technician removes CRM sample bags and delivers those to the geologist. The geologist
inserts the CRMs according to the sample tag book and returns the CRMs, bagged and sealed, to the
sample Technician.
The sample Technician cuts the core along the marked cut line provided by the geologist. The cut core is
placed in the pre-designated plastic sample bag. The corresponding sample tag is added to the bag.
The bag is sealed and set aside. The remaining half-core is returned to the original core box. Once a
box is completed, it is placed into a temporary storage rack until the entire hole is cut. The sample
Technician typically completes twenty (20) sequential samples before taking the individually bagged,
tagged and sealed samples and placing them into a rice bag. The starting and ending sample numbers
for each rice bag are recorded on the exterior of each rice bag in felt marker. Each rice bag is sealed
and stored for transportation to the lab only when the entire drill hole has been completed.
On completion of core cutting, the core is transferred back to the core Technician who then creates
permanent metal tags for each core box with the hole number, box number, starting and ending depth of
each box. The Technician then takes the core to the core photography area, where the core is
photographed, dry and wet, for its entirety. On completion of the photography, photos are uploaded to the
digital database for each hole. The half-core is then placed into permanent storage racks and its location
is noted in the core storage area.
The rice bags for each hole are transferred to the Company's Logistics Manager. The geologist
prepares a sample submission form identifying the analytical suite requested. This is provided to the
Logistic Manager in physical form and communicated to the selected analytical lab electronically by
email. The Company's QP is copied on all sample submission forms.
The Logistics Manager delivers the rice bags for each completed drill hole to the selected analytical
facility.
Quality Assurance and Quality Control
All samples are currently delivered to Activation Laboratories Ltd. ("
Actlabs
") facility in Thunder Bay,
Ontario. Actlabs is independent from the Company and is fully accredited by the Standards Council of
Canada ("SCC") as per SCC-15308 ISO/IEC 17025:2017 General requirements for the competence of
testing and calibration laboratories. Actlabs current certification expires February 27, 2030.
The Company typically utilizes two primary analytical procedures offered by Actlabs. The majority of
samples are prepared according to Actlabs RX1 procedure; dried, crushed to 80% passing 2.0 mm. A
250-gram sample is split and pulverized to 95% passing 105 microns. The crushed reject is stored for
return to the client. The 250-gram pulverized sample is split to obtain an approximate 30-gram sample
for assay. The reject portion of the 250-gram pulverized sample is stored for return to the client.
The 30-gram sample aliquot is analyzed using Actlabs 1A2 procedure, lead collection fire assay fusion
(FA) with an atomic absorption (AAS) finish. All assay results greater than 5.0 g/t Au are re-assayed
using Actlabs 1A3-30 method which uses a gravimetric finish for higher accuracy. All assays greater
than 30.0 g/t Au are re-assayed using Actlabs 1A4-1000 screen metallics method where a
representative 1000-gram sample is split from the crushed reject fraction, pulverized to 95% passing
149 micron and sieved and analyzed by size fraction. Assays are performed on the entire +149 µm
fraction and two splits of the -149 µm fraction. A final assay is calculated based on the weight of each
size fraction. All the above is completed at Actlabs Thunder Bay facility.
The Company requested Actlabs PhotonAssay procedure for the final 535 samples of the Phase Three
drill program (approximately 30% of the submitted samples). Prior to requesting this method change, the
Company completed dual analyses comparing PhotonAssay to the 1A2-1A3-30 procedures used to this
point. No material change in results were observed.
The PhotonAssay method requires each sample to be crushed to 80% passing 2.0 mm. A 500-gram
sample is split and placed into unique, barcoded plastic jars. The barcoded jars are automatically
logged into the system. Samples are weighed and photographed automatically. The sample is placed on
a conveyor and transported to the analysis chamber where it is bombarded with high energy x-rays. The
x-rays cause the atomic nuclei (in this case gold) to enter an excited state. As the nuclei return to their
ground state, they emit characteristic gamma rays which are detected and measured by semiconductor
detectors, allowing the element's concentration to be calculated for each jar. Under this process, sample
preparation is completed at Actlabs' Thunder Bay facility. The sample containers are then shipped to
Actlabs' Ancaster facility for PhotonAssay.
Actlabs reports the results to the Company's QP and Logistics Manager. The QP is responsible for
monitoring CRM results, flagging and investigating any failures and if necessary, requesting any re-
assaying. Typically, five samples preceding and following an unexplained failure are re-assayed using
the original sample pulp. Occasionally, re-assaying is requested for a new pulp generated from the
crushed reject.
Qualified Person
Technical information in this news release has been reviewed and approved by Wes Hanson, P.Geo.,
President and CEO of Thunder Gold Corp., who is a Qualified Person under the definitions established
by National Instrument 43-101.
About the Tower Mountain Gold Property
The 100%-owned Tower Mountain Gold Property is located adjacent to the Trans-Canada highway,