Guardian ExploraƟon Concludes 2025 Field Work at Sundog Gold Project; Reports Preliminary High Grade Gold Results
GUARDIAN EXPLORATION INC.
NEWS RELEASE
Guardian Explora�on Concludes 2025 Field Work at Sundog Gold Project; Reports Preliminary High Grade Gold Results
For Immediate Release
Calgary, Alberta – November 12, 2025 — Guardian Explora�on Inc. (TSXV: GX) (OTCQB: GXUSF) (Frankfurt: R6B) (“Guardian” or the “Company”) is pleased to announce the successful comple�on of its 2025 field program at the Sundog Gold Project in the Kivalliq Region of Nunavut and to report significant gold assay results.
Guardian’s Sundog property spans 94.15 km² (23,265 acres) within the central Ennadai–Rankin Archean greenstone belt, a major Neoarchean supracrustal complex comprising volcaniclas�cs, mafic volcanic flows, and clas�c sedimentary units that were later deformed by Paleoproterozoic shear zones. Guardian’s Sundog and Esker Gold projects lie within the Central Hearne domain of the Hearne Craton, part of the Western Churchill Province of the Canadian Shield—an area that preserves one of the world’s largest and most prospec�ve Archean greenstone terranes.
The Ennadai–Rankin greenstone belt covers more than 100,000 km² (38,610 sq. miles) and represents both a regionally extensive stra�graphic package and a major gold metallotect. It hosts several significant deposits and gold-bearing systems, most notably the world-class Meliadine mine, which has produced more than 2 million ounces of gold and contains an addi�onal 7+ million ounces in reserves and resources (Agnico Eagle, 2024).
Addi�onally, the region includes the historic Cullaton Lake mine, located near the Shear Lake deposit. The Cullaton opera�on produced approximately 200,000 ounces of gold during its years of ac�vity in the early to mid-1980s (1981–1985), further underscoring the gold endowment of the Central Hearne domain.
Within this geological context, the Sundog Gold Project is underlain by Archean volcanic and sedimentary rocks of the Henik Group, which are unconformably overlain by Hurwitz Group sediments—an architecture typical of produc�ve gold-bearing greenstone terranes across the Canadian Shield.
The 2025 Sundog field program was conducted from September 1 to October 7, 2025, comprising geological mapping, structural interpreta�on, trenching, prospec�ng, and grid establishment across the northern por�on of the property. A total of 248 rock samples were collected within the Sundog project area for analysis, including 86 cut channel samples from
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historic trenches 8, 9B, 10, 17 and 29. The program successfully confirmed mul�ple gold-bearing structures and expanded the known footprint of mineraliza�on.
Guardian established a 10-12 person field camp at the Cullaton lake airstrip, adjacent to the historic Cullaton Lake mine, and located 18km SW of the Sundog explora�on area, which will be used for planned 2026 field work. The airstrip was used in 2025 for landing DC-3 fixed wing aircra�, and historically has served larger cargo planes.
(a) Guardian’s Cullaton Lake explora�on (b) Cullaton airstrip, capable of receiving camp. DC-3 aircra�.
The following reports the results of the Sundog field program. Guardian did not undertake work to establish the existence of any mineral resources or mineral reserves as defined by Na�onal Instrument 43-101 and none are reported herein. It is uncertain if future explora�on will result in defini�on of mineral resources or mineral reserves.
The Sundog gold occurrence was first discovered in 1962. Subsequent follow-up work by Abermin Corpora�on in the Fall of 1987 included a one-month field program of detailed geological mapping of a gridded area, Very Low-Frequency (“VLF”) ground geophysics, a humus geochemical survey and a program of excava�on and mapping of 38 hand trenches, 27 of which were sampled and assayed.
As part of Guardian’s 2025 field work program all historical trenches from 1987 Sundog work programs were relocated with the objec�ve of confirming historical work and observa�ons, as well as resampling of significant gold-bearing intervals within historical trenches. Three new trenches were excavated and sampled (9B, 40 and 41) and 9 historical trenches were reexcavated, enlarged, and sampled (8, 9, 10, 11, 12, 17, 29, 30 and 31). Numerous grab and channel samples returned >10 g/t Au, with peak values up to 34.45 g/t Au.
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(c) Sundog traverse, baseline, and sample sites. (d) Samples prepped for transport.
Two significant conclusions from a brief report produced by Sco� Anderson, Ph.D., P.Geo., following a site visit from Sept 18 – 22, include:
- Gold-bearing veins at Sundog are mainly hosted in competent mafic–intermediate intrusive sills with weak to negligible duc�le fabrics, indica�ng that competency contrast likely focused quartz veining and mineraliza�on. These sills form shallowly east- and northeast-dipping structural panels, sugges�ng explora�on poten�al at depth to the east or along strike to the north and south.
- Veins are primarily associated with steep NNE–SSW bri�le-dominant structures, but the presence of shallow, low-angle duc�le fabrics and high-strain zones indicates addi�onal poten�al for flat-lying mineralized zones, either within fractured favourable rock sheets or along flat-lying high-strain zones.
Broad zones of anomalous mineraliza�on (>0.5 g/t Au) have been iden�fied in quartz– carbonate–sulphide veining hosted within dominantly metavolcanic rocks and possible fine-
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grained gabbro sills, as reinterpreted from earlier mapping. Further work in 2026 will be required to confirm these lithological rela�onships.
Panning of soils and weathered bedrock from trench and historical sample sites confirmed the presence of coarse, recoverable gold, consistent with gold reported in prior explora�on by Abermin Corpora�on (1987) and subsequent programs by other operators.
(e) Gold grains recovered from Sundog Trenches
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(f) Visible gold in cut channel sample 291634. Pencil indicated loca�on of gold grain.
Ini�al grab sampling included 162 samples of quartz vein and mafic volcanic wall rock from float, outcrop and trenches. Significant grab/chip sample results are presented in Table 1 below. Note that grab/chip samples are selec�ve in nature and may not represent the overall grade or width of mineraliza�on.
Table 1: Significant Grab / Chip Sample Results
| Sample Number | LocaƟon | 2025 Result | Overlapping/Adjacent 1987 Chip/Grab Sampling Results | |
| by | ||||
| Photonassay | ||||
| (g/t Au) | ||||
| 29501 | South of Trench 29; Grab/ Float (source unknown) | 6.041 | ||
| 291579 | Trench 8; Discont. chip from 12cm vein | 2.339 | KR-SD-87207; 2.958 g/t Au from metallic screen assay. | |
| 291587 | Trench 9; Discont. chip from 10cm vein | 5.726 | ||
| 291590 | Trench 9: 20-25cm discont. chip of altered mafic volcanic | 1.242 | KR-SD-87293; 16.787 g/t Au from metallic screen assay. |
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| 291591 | Trench 10; Discont. chip from 35cm QV and altered mafic volcanic | 3.994 | KR-SD-87271; 7.996 g/t Au from metallic screen assay. |
| 291592 | Trench 10; Discont. chip from 15cm quartz vein | 20.177 | |
| 291593 | Trench 10; Discont. chip from 10-12cm quartz vein | 34.45 | KR-SD-87275; 4.12 g/t Au from metallic screen assay. |
| 291594 | Trench 10; Discont. chip; from 15cm quartz vein | 0.722 | |
| 291596 | Trench 10; Discont. chip; from 10cm quartz vein | 0.112 | KR-SD-87273; 38.54 g/t Au from metallic screen assay. |
| 291597 | Trench 10; Discont chip over 30cm x 30cm area of QV stockwork and mafic volcanic | 22.231 | |
| 291600 | Trench 10; Discont. chip; from 15cm quartz vein | 21.536 | KR-SD-87313; 4.37 g/t Au from metallic screen assay. |
| 291706 | Trench 17; Discont chip over 25cm x 25cm area; quartz vein and altered mafic volcanic | 1.767 | |
| 291708 | Trench 17; Discont chip over 35cm x 20cm area; quartz vein and altered mafic volcanic | 1.079 | |
| 291701 | Trench 31; Discont. chip from weathered outcrop; 20cm x 30cm area. | 6.687 | KR-SD-87248; 2.158 g/t Au from metallic screen assay. |
Subsequently, a program of saw-cut con�nuous channel sampling was undertaken in Trench 8, 9B, 10, 17 and 29 areas.
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Table 2: Trenches with Cut Channels
| Trench No. | Channel No. | Cut Length (m) | Trench No. | Channel No. | Cut Length (m) |
|---|---|---|---|---|---|
| 8 | 1 | 1.54 | 17 | 1 | 3.00 |
| 9B | 1 | 2.03 | 2 | 3.58 | |
| 2 | 2.91 | 3 | 1.80 | ||
| 10 | 1 | 2.43 | 4 | 1.60 | |
| 2 | 1.35 | 5 | 2.50 | ||
| 3 | 2.18 | 29 | 1 | 1.60 | |
| 4 | 1.75 | 2 | 1.16 | ||
| 5 | 4.97 | 3 | 1.30 | ||
| 6 | 1.06 | 4 | 1.02 | ||
| 7 | 2.59 | 5 | 2.98 | ||
| 8 | 2.08 | 6 | 1.35 | ||
| 9 | 1.11 | ||||
| 10 | 1.21 | ||||
| 11 | 2.44 |
Highlights of channel sampling include:
- Samples from Trenches 8 and 9B, located about 260m north of Trench 10, have returned results confirming analyses from previous workers and extending gold mineraliza�on to the south of excava�ons by previous workers, almost doubling the strike length from 8.8m to 15.4m.
- Trench 10, which is centered on the historic 1962 Selco discovery outcrop, was reexcavated and enlarged, and has been extended to the NE and North, compared with previous work. The strike length of vein-hosted gold mineraliza�on has been extended from 15.5m in 1987 to at least 40m following Guardian’s channel sampling program.
- Trench 17, located 240m southwest of Trench 10, has returned anomalous to low-grade gold in almost every sample collected. Fine gold has been panned by Guardian from weathered bedrock and soil from several loca�ons within Trench 17. The area is showing poten�al as a lower-grade larger target, supported by possible extensions of mineraliza�on eastward towards trench 30 and trench 31. This area will receive extensive follow-up inves�ga�on in the 2026 field season.
- Observa�ons and sampling from Trench 30 and 31 confirm that gold is present in narrow quartz veins crosscu�ng or parallel to shallow dipping folia�on in foliated fine grained mafic volcanic rocks, which has not previously been a focus of explora�on.
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(g) Exposure of Hurwitz Group (h) Guardian’s management and field crew. quartzite, iron forma�on and quartz veining.
Table 3: Significant Channel Sampling results
| Sample Number | Location | Interval (cm) | 2025 Result by Photonassay (g/t Au) | Overlapping/Adjacent 1987 Sampling Results | |
|---|---|---|---|---|---|
| 291731 | Trench 8 | 96 | 4.695 | KR-SD-87208 (grab sample); 9.566 g/t Au from metallic screen assay. | |
| 291733 | Trench 9b | 60 | 1.068 | ||
| 291738 | Trench 9b | 72 | 8.851 | ||
| 291676 | Trench 10; Channel 1 | 30 | 10.914 | ||
| 291677 | Trench 10; Channel 1 | 72 | 0.88 | ||
| 291678 | Trench 10; Channel 1 | 46 | 8.23 | ||
| 291682 | Trench 10; Channel 2 | 32 | 1.474 | KR-SD-87275 (grab sample); 4.12 g/t Au from metallic screen assay. | |
| 291687 | Trench 10; Channel 3 | 45 | 1.273 | ||
| 291696 | Trench 10; Channel 5 | 10 | 1.038 | ||
| 291622 | Trench 10; Channel 8 | 51 | 7.411 | ||
| 291624 | Trench 10; Channel 8 | 94 | 7.429 | ||
| 291627 | Trench 10; Channel 9 | 20 | 20.072 |
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| 291634 | Trench 10; Channel 10 | 63 | 6.451 |
| 291636 | Trench 10; Channel 11 | 17 | 0.813 |
| 291637 | Trench 10; Channel 11 | 11 | 2.98 |
All cut intervals were oriented across the strike of the veining. Although most of the sampled veins are near-ver�cal, the reported intervals represent apparent widths of mineraliza�on. True thicknesses are not known at this �me.
Addi�onal informa�on is available on the company website at guardianex.com.
Graydon Kowal, President and CEO, commented:
“Our 2025 field work at Sundog has delivered encouraging results in a highly fer�le gold field. The results confirm the presence of high-grade gold, and visible coarse gold observed in the field supports our interpreta�on of a nuggety system. These posi�ve results are providing the next level of confidence as we prepare to expand the explora�on area and for drill targe�ng in 2026.”
Explora�on plans for 2026 field work include expansion of the historically gridded area, addi�onal geological mapping, soil sampling, trenching, drone geophysics (magne�cs and radiometrics), and diamond drilling.
QA/QC Protocols
All rock and channel samples collected during the 2025 program were securely bagged, tagged, and shipped with numbered security seals to maintain full chain-of-custody compliance. The bags were shipped to Paragon Analy�cal Ltd. in Surrey, B.C., a facility accredited under ISO/IEC 17025 and ISO 9001 standards.
Guardian’s QA/QC program includes inser�on of cer�fied reference materials (standards), blanks, and field duplicates. Paragon Analy�cs Ltd. also follows a QA/QC program of inser�on of 350-500g aliquots (the quan�ty required for effec�ve Photonassay analysis) of standards, blanks and duplicate samples into the stream.
All QA/QC data were reviewed and verified by the Company’s Qualified Person prior to disclosure.
Historical Analy�cal Results
The historical 1987 analy�cal results contained in this news release were generated by previous operators (Abermin Corpora�on) prior to the implementa�on of NI 43-101 and have not been independently verified by the Company’s Qualified Person. These results are considered historical in nature. While the Company considers the historical data to be relevant to assessing
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the explora�on poten�al of the property, the Company has not completed sufficient work to classify the historical es�mates or analyses as current in accordance with NI 43-101. The Company is not trea�ng the historical results as current and they should not be relied upon. Future explora�on work, including verifica�on sampling, may produce results that differ materially from those reported herein. Further to that the analy�cal methodologies, sampling procedures, and QA/QC protocols used by previous operators may not meet current NI 43-101 standards. The Company’s Qualified Person has reviewed the informa�on to the extent possible but cannot confirm the reliability or accuracy of the historical analy�cal results.
Analy�cal Procedure
Guardian’s 2025 samples were analyzed at Paragon Analy�cal Ltd., an ISO-accredited geochemical laboratory based in Surrey, B.C. using the PhotonAssay™ method. All samples are also being submi�ed for mul�-element analysis (4-acid diges�on with ICP-MS 48 element analysis) by Paragon’s facili�es in Reno, Nevada.
PhotonAssay™ is par�cularly advantageous in coarse-gold systems such as Sundog, where smallscale variability in gold distribu�on (the nugget effect) can cause under- or over-repor�ng in conven�onal assays. To further assess this variability, Guardian has submi�ed selected highgrade samples for PhotonAssay-to-Ex�nc�on, in which mul�ple aliquots of each sample are analyzed independently and averaged to generate a sta�s�cally representa�ve gold value. Results are pending.
All samples returning >0.5 g/t Au are being re-analyzed using Screen Metallic Fire Assay with AAS finish (Paragon Method FAS-211) to confirm grade distribu�on and validate PhotonAssay™ results. Results are pending.
Qualified Person
The technical informa�on in this news release has been reviewed and approved by Steven Dudka, P.Geo., a Qualified Person as defined under Na�onal Instrument 43-101 – Standards of Disclosure for Mineral Projects.
About Guardian Explora�on Inc.
Guardian Explora�on Inc. is a TSXV-listed company (TSXV: GX) (OTCQB: GXUSF) (Frankfurt: R6B) engaged in oil, gas, and mineral explora�on and development. Guardian’s assets include the Sundog and Esker gold projects in Nunavut’s Kivalliq Region, the Mount Cameron Property in Yukon’s Mayo Mining District, and the Kaigani claims in Southeast Alaska.
FOR FURTHER INFORMATION PLEASE CONTACT:
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Graydon Kowal
President & Chief Execu�ve Officer Tel: (403) 730-6333
Neither the TSX Venture Exchange nor its Regula�on Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.
Forward Looking Statements
This press release contains certain forward-looking statements, including, without limita�on, statements containing the words "may", "plan", "will", "es�mate", "con�nue", "an�cipate", "intend", "expect", "in the process" and other similar expressions which cons�tute "forward looking informa�on" within the meaning of applicable securi�es laws. Forward-looking statements reflect the Company's current expecta�on and assump�ons, and are subject to a number of risks and uncertain�es that could cause actual results to differ materially from those an�cipated. These forward-looking statements involve risks and uncertain�es including, but not limited to, our expecta�ons regarding mineral explora�on. Such statements reflect the current views of the Company with respect to future events and are subject to certain risks and uncertain�es and other risks detailed from �me-to-�me in the Company's on-going filings with the securi�es regulatory authori�es, which filings can be found at www.sedar.com. Actual results, events, and performance may differ materially. Readers are cau�oned not to place undue reliance on these forward-looking statements. The Company undertakes no obliga�on to publicly update or revise any forward-looking statements either as a result of new informa�on, future events or otherwise, except as required by applicable securi�es laws.