Outer Rim Exploration Launches Maiden Muon Imaging Survey for Copper Mineralisation with Transatlantic Mining
Transatlantic Mining Corp. | Suite 400 | 837 West Hastings Street | Vancouver | Canada
V6C 3N6 T 604-630 7296 | F 604-357 1139| www.transatlanticminingcorp.com
Outer Rim Exploration Launches Maiden Muon Imaging Survey for Copper
Mineralisation with Transatlantic Mining
Vancouver, B.C. December 15, 2025 - Transatlantic Mining Corp. (the “Company”)
(TCO:TSX.V) is pleased to announce the company has engaged a maiden technical trial with
Outer Rim Exploration (“ORE”) utilising a new Muon enhanced technique to identify voids
and new mineralisation association at its Monitor Copper Gold project in Idaho USA.
The campaign marks the first North American deployment of ORE’s portable muon
hodoscope for the mining industry. The survey will evaluate the continuity and potential
size of a chalcopyrite-rich copper ore zone and map unmapped historical mine workings
within the area.
The new muon-based tomography system aims to accelerate subsurface mapping and
reduce drilling costs in mineral exploration.
Business and Technical Impact
By imaging both mineralized and void zones, ORE’s data will provide Transatlantic with
valuable insights into orebody geometry and historical mine dimensions. This improved
understanding will support drill planning, future mine planning, cost optimization, and risk
reduction associated with drilling and mine excavation.
“Our goal is to replace guesswork with captured data,” said Jeremy Anderson, CEO and Co-
Founder of Outer Rim Exploration.
Bernie Sostak, CEO of Transatlantic Mining , said, “With a portable detector, we can image
historical underground cavities, and provide clarity that usually takes months of drilling to
achieve. We are also excited to partner with Outer Rim to evaluate the potential extensions
of the known and unknown copper-bearing chalcopyrite mineralization. This collaboration
represents a new frontier in mineral imaging, bringing particle physics to the service of
practical exploration.”
Transatlantic Mining Corp. | Suite 400 | 837 West Hastings Street | Vancouver | Canada
V6C 3N6 T 604-630 7296 | F 604-357 1139| www.transatlanticminingcorp.com
Survey Objectives
ORE’s muon hodoscope operates as a fully stand-alone, battery-powered, passive, and
environmentally friendly imaging platform that requires no active radiation source or
drilling. Compact and ruggedized, the system fits within narrow adits and underground
passages or can be deployed on the surface, enabling continuous autonomous scanning
over weeks of operation—even in remote or constrained environments.
The survey will determine whether the chalcopyrite-bearing copper mineralization,
previously observed at widths ranging from 0.3 m width, and looking to extend laterally
along strike and/or vertically. ORE’s detectors will also image subsurface voids to improve
geotechnical understanding and guide future exploration drilling.
Next Steps
Following the campaign, ORE will process the muon data through its proprietary AI-driven
density-mapping pipeline to generate 2D and 3D visualizations of subsurface density
variations. The findings will inform Transatlantic’s exploration strategy and guide future
deployments across additional sites in North America.
About Outer Rim Exploration (ORE)
Outer Rim Exploration Inc. is a deep-tech company pioneering portable muon tomography
systems for subsurface imaging in mining and infrastructure. ORE’s mission is to
revolutionize how humanity explores beneath the surface of the Earth.
https://www.ore.space/
About Transatlantic Mining Corp.
Transatlantic Mining (TSX -V: TCO) is an emerging precious and base metal explorer. The
Company has a focus on converting projects into mines within stable mining jurisdictions.
The Company currently holds property interests including an 80% Joint Venture position on
the Monitor Copper -Gold project in Montana -Idaho (USA) and 100% of the Golden Jubilee
Gold Project with its associated mining rights. The Company also has an extended lease, right
to mine, and purchase arrangement for the Miller Gold Mine in Mon tana, moving towards
100% ownership by way of a payment royalty.
Cautionary Statement Regarding Forward-Looking Statements
This news release contains "forward -looking statements" within the meaning of Canadian
securities legislation. These forward -looking statements include, but are not limited to,
Transatlantic Mining Corp. | Suite 400 | 837 West Hastings Street | Vancouver | Canada
V6C 3N6 T 604-630 7296 | F 604-357 1139| www.transatlanticminingcorp.com
statements regarding the Company's future exploration plans, geophysical programs, and
the potential for mineralization. Forward -looking statements are subject to known and
unknown risks, uncertainties, and other factors that may cause the actual results, level of
activity, performance, or achievements of the Company to be materially different from those
expressed or implied by such forward-looking statements. These factors include, but are not
limited to, risks associated with the exploration and development of mineral properties, the
Company's ability to obtain necessary permits, and the availability of financing. Readers are
cautioned not to place undue reliance on forward -looking statements. The Company
undertakes no obligation to update or revise any fo rward-looking statements, except as
required by law.
For further information, please contact: Bernie Sostak:
[email protected] , +61 (0) 439 904 044,
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.