Eagle Plains’ Partner Sun Summit Approves 2026 Exploration for the Theory Project, Toodoggone District, BC
Eagle Plains’ Partner Sun Summit Approves 2026 Exploration for the
Theory Project, Toodoggone District, BC
Cranbrook, B.C., May 26, 2026: Eagle Plains Resources Ltd. (TSX-V:EPL) (OTCQB:
EGPLF) (“EPL” or “Eagle Plains”) is pleased to announce that partner Sun Summit Minerals
Corp. (TSX-V: SMN; OTCQB: SMREF) (“Sun Summit”) has approved the 2026 exploration
plan at Eagle Plains’ Theory copper -gold project (the "Theory Project"), Toodoggone Mining
District, north-central British Columbia. The property is owned 100% by Eagle Plains, with 122
hectares of the property subject to an underlying 0.5% Net Smelter Royalty held by a third party.
The 9677 ha Theory Project borders Thesis Gold’s Ranch Project to the north and is located within
10 km to the northwest of Sun Summit’s JD Project. Sun Summit has an exclusive option
agreement with Eagle Plains to earn up to a 100% interest in the project, located in the highly
prospective Toodoggone Mining District. (see press release dated March 17, 2025)
Theory Project 2026 Exploration Program
The 2026 work program will build on the success from the 2025 field season, the first significant
fieldwork on the property in over 30 years. (see press release dated January 21, 2026)
The 2026 program will be executed in three phases. Phase 1 work will consist of a property scale,
250m line spaced, airborne magnetotelluric survey to image subsurface resistivity and help locate
causative intrusions and possible conduits for mineralization. The MobileMT survey will be
completed by Expert Geophysics Surveys Inc. of Newmarket, ON, under the guidance of
geophysicist, Andrei Bagrianski, P.Geo.
Phase 2 fieldwork will include mapping/prospecting and rock, soil, silt geochemical sampling with
crews based out of temporary, helicopter supported, camps. Work will focus on the detailed
evaluation of targets identified by 2025 fieldwork, assessment of areas of interest generated by the
MobileMT survey, and ongoing target generation and assessment in underexplored areas of the
property.
Phase 3 will include Induced Polarization (IP) surveys conducted by Peter E. Walcott and
Associates Ltd. over high priority target areas.
The results from the 2026 work program will be analysed and modelled to identify and prioritize
targets for 2027 drill testing. The proposed work program will have a budget of approximately
$700,000.
Fieldwork will be managed by TerraLogic Exploration Inc. and is anticipated to begin in early -
June and continue into September. Eagle Plains is the project operator.
Highlights from 2025 Field Program
2025 work included:
• Data Compilation with rectification and analysis of historical surface sampling and reconnaissance
mapping.
• Remote Sensing Acquisition of district-and property-scale datasets, focusing on VNIR and SWIR
bands to identify mineral groups diagnostic of epithermal and porphyry alteration.
• Field Program consisting of prospecting, detailed geological mapping, and systematic rock, soil,
and silt geochemical sampling on targets identified through data analyses.
Saboteur Zone: New high grade copper discovery
• 3km length zone of copper mineralization associated with coincident magnetic high transition zone
and strong radiometric potassic alteration anomaly
• 15 of the rock samples collected returned over 1% Cu
• Grab sample LSTHR040: 4.78% copper, 0.635 g/t gold, 49 g/t silver;
BEV Zone:
• Broad copper soil and silt geochemical anomaly associated with multiphase alteration
• Grab sample BLTHR029: 1.44% copper, 0.043 g/t gold, 12.8g/t silver;
Fred-DM-DMR Zone:
• 1.6 km x 3km zone of copper mineralization associated with barite veining
• Grab sample BLTHR051: 6.42% copper, 0.088 g/t gold, 99 g/t silver;
• Grab sample JBTHR008: 0.65% copper, 12.6 g/t gold, 3150 g/t silver;
Petrographic analyses of 2025 samples identified strong epidote -chlorite-carbonate alteration
directly with hypogene copper mineralization (chalcopyrite – bornite – chalcocite). This type of
mineralization and alteration assemblage is interpreted to represent the inner shell of a porphyry
system, which may indicate a proximal source for some of the Theory mineralization.
About the Theory Project
The 9676ha Theory Project is located in northern BC within the Toodoggone Mining District. The
district is endowed with both epithermal gold and porphyry copper -gold deposits, most notably
the past producing Kemess Mine owned by Centerra Gold. The Omineca Resource Road provides
access to the region from Mackenzie, BC. Recent road upgrades completed in 2023 by Thesis Gold
on their Lawyers-Ranch Project brought road access to within 8 kms of the Theory Project.
Geology in the Theory region is primarily comprised of lower Jurassic Hazelton Group volcanics
which unconformably overlie late Triassic Takla Group volcanics. The entire package of rocks i s
intruded by late Triassic and early Jurassic stocks. The majority of the Theory property encompasses
the highly prospective Jurassic -Triassic unconformity (~200 Ma), termed by the BC Geologic
Survey as the ‘Red-Line’, which is known to have a high spatial correlation to many of the known
deposits throughout the Golden Triangle and Toodoggone.
Exploration by previous operators has been intermittent since the mid- 1960’s and regional
government surveys are sparse, however encouraging mineralization and alteration commonly
associated with both epithermal and porphyry systems has been documented. The most
significant documented work was completed in 1988 in the north and west areas of the Theory
project area. Work consisted primarily of alpine ridge and subalpine prospecting traverses as well
as reconnaissance soil sample lines in areas where no outcrop was present. This work
documented occurrences of low-sulphidation epithermal-related mineralization including quartz-
barite veins with up to 8.2 g/t Au, 195 g/t Ag, and 6.2% Cu at the DM occurrence (BC Minfile
094E 231)*; and a quartz carbonate vein system with up to 6.8 g/t Au and 1,480 g/t Ag at the
Fred-1 occurrence (BC Minfile 094E 402)*. The BEV occurrences (BC Minfile 094E 259)*,
interpreted as a Cu-Au porphyry target, returned select historical rock results up to 0.47% Cu,
10.5 g/t Ag, and 0.13 g/t Au. Detailed soils revealed a 1.6 by 2 kilometre copper-in-soil anomaly
with peak soil results to 920 ppm Cu . Very little work is documented in the south and eastern
parts of the property.
Recent exploration success in the area has been highlighted by Thesis Gold’s announcement at their
Lawyers-Ranch Project of a combined Measured and Indicated Mineral Resource of 4.564 Moz
grading 1.21 g/t AuEq and Inferred Resources of 643 koz grading 1.23 g/t AuEq (Lawyers - Ranch
Project NI 43 - 101 Technical Report and Pre - feasibility Study British Columbia, Canada Effective
Date: December 1, 2025) and by Amarc Resources’ new high- grade copper-gold-silver discovery
at the AuRORA zone of the Joy Project (Amarc Resources, January 17, 2025 News Release).
In late 2023 Eagle Plains acquired the property through staking and third-party agreements. After
undertaking initial compilation and interpretation of historical data on the project, Eagle Plains
completed a property wide, high resolution airborne magnetic and radiometric survey in July 2024,
followed by fieldwork in 2025.
Management cautions that historical results were collected and reported by past operators and
have not been verified nor confirmed by a Qualified Person but form a basis for ongoing work on
the subject properties. Management cautions that past results or discoveries on proximate land
are not necessarily indicative of the results that may be achieved on the subject properties.
Qualified Person
Technical information in this News Release has been reviewed and approved by C.C. Downie,
P.Geo., a director and officer of Eagle Plains, hereby identified as the “Qualified Person” under
N.I. 43-101.
About Eagle Plains Resources
Based in Cranbrook, B.C., Eagle Plains is a well -funded, prolific project generator that
continues to conduct research, acquire and explore mineral projects throughout western Canada,
with a focus on critical metals integral to an increasingly electrified, decarbonized economy.
The Company was formed in 1992 and is the fourth-oldest listed issuer on the TSX-V (and the
only one of these four that has not seen a roll -back or restructuring of its shares). Eagle Plains
has continued to deliver shareholder value over the years and thr ough numerous spin outs has
transferred over $115,000,000 in value directly to its shareholders, with Copper Canyon
Resources and Taiga Gold Corp. being notable examples. Eagle Plains latest spinout, Eagle
Royalties Ltd. (CSE:“ER”) was listed on May 24, 2023, and on October 30, 2025, ER
shareholders overwhelmingly approved a three -cornered amalgamation that resulted in a
reverse takeover of Eagle Royalties by Summit Royalty Corp. The resulting issuer is named
Summit Royalties Ltd. and trades under the symbol SUM on the TSX Venture Exchange with
a market capitalization of over $100M.
On October 2, 2024, Eagle Plains announced the formation of a separate division within the
Company that will give Eagle Plains’ shareholders direct exposure to strategic opportunities in
Canadian green energy transition. As a wholly owned subsidiary of Eagle Plains, Osprey
Power Inc. (“OP”) will focus on identifying and advancing innovative and diverse clean
energy project portfolios in target markets throughout Canada, with an initial focus on Western
Canada.
Eagle Plains’ core business is acquiring grassroots critical - and precious -metal exploration
properties. The Company is committed to steadily enhancing shareholder value by advancing
our diverse portfolio of projects toward discovery through collaborative partnerships and
development of a highly experienced technical team.
Expenditures from 2010- 2025 on Eagle Plains -related projects exceed $ 41M, the majority of
which was funded by third- party partners. This exploration work resulted in approximately
50,000m of diamond- drilling and extensive ground- based exploration work facilitating the
advancement of numerous projects at various stages of development.
Throughout the exploration process, our mission is to help maintain prosperous communities
by exploring for and discovering resource opportunities while building lasting relationships
through honest and respectful business practices.
On behalf of the Board of Directors of Eagle Plains
“C.C. (Chuck) Downie, P.Geo”
President and CEO
For further information on EPL, please contact Andrew Wilson at 1 866 HUNT ORE (486 8673)
Email: [email protected] or visit our website at https://www.eagleplains.com
Cautionary Note Regarding 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 release. This news release may contain forward-looking statements including but not limited
to comments regarding the timing and content of upcoming work programs, geological
interpretations, receipt of property titles, potential mineral recovery processes, etc. Forward-
looking statements address future events and conditions and therefore, involve inherent risks and
uncertainties. Actual results may differ materially from those currently anticipated in such
statements.