22:10:14 EDT Wed 14 Oct 2026
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Atomic Minerals Corp (3)
Symbol ATOM
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Atomic detects radon at South Lisbon Valley East

2026-10-14 16:39 ET - News Release

Mr. Clive Massey reports

ATOMIC MINERALS DETECTS RADON ALONG FAULTS AT LISBON VALLEY

Atomic Minerals Corp. has released the results of a radon cup survey at its 1,516.5-acre (614-hectare) South Lisbon Valley East property located within the Colorado Plateau uranium district, approximately 35 kilometres northeast of Monticello, Utah.

The survey was designed to detect elevated radon gas emanating from the base of the Moss Back member of the Triassic Chinle formation. Survey highlights:

  • The radon survey found elevated radon counts to the southwest on all five survey lines, associated with a mapped fault acting as a conduit for sources at depth.
  • The radon survey found elevated radon counts to the northeast on lines 1 through 3, again associated with a mapped fault acting as a conduit for sources at depth.
  • The radon results from the southeastern-most line, significantly lower in elevations (75 to 100 metres), produced relatively higher radon values than the other four lines, reflecting either jointing perpendicular to the northwest-southeast-trending fault or the significant decrease in elevation bringing the potential source closer to surface.
  • Spot anomalies in the middle of some of the lines may point toward a source higher in the stratigraphic section, likely the Morrison formation.

"The radon cup survey successfully located elevated counts along known faults, strongly supporting sources at depth, adding to our geological database and geological model, as we continue to derisk our upcoming Lisbon Valley East drill program," commented Atomic Minerals' chief executive officer Clive Massey. "Our drilling permit has been approved and only requires posting of the bond to allow us to commence drilling as we chase a NE analogue to the previously producing uranium belt to the SE of the Lisbon Valley fault, where 78 million pounds was previously produced," he continued.

"Atomic Minerals also owns three additional Chinle projects in the Colorado Plateau. Harts Point, lying to the northeast of Lisbon Valley, where 2024 drilling by previous joint venture partner Kraken Energy confirmed elevated gamma ray counts in the Moss Back member, is approved for drilling subject to bonding. Ten Mile lies northwest of Moab and hosts elevated gamma ray readings in the Moss Back member in historic oil and gas drill holes. Dolores, the site of historic drilling by Hunt Oil and Newmont, lies along trend from Lisbon Valley over the state line in Colorado, again hosting elevated gamma ray readings in the Moss Back member," Mr. Massey concluded.

Radon survey

The survey was completed by Stephen McKay of McKay Mineral Exploration LLC of South Ogden, Utah. The description of the survey is taken directly from his report, with metric measurements added.

Five equally spaced lines at half-mile (817-metre) intervals along the length of the property were sampled at 150-foot (45.7-metre) intervals across the full width of the property. Radon measurements were collected using the E-perm system, which consists of an electret (the device that measures the radon), S-chamber (ion chamber) that holds the electret while it is measuring the radon and the SPER-1 reader, which reads the electret after data collection is completed.

Twenty detectors were deployed each day. This included setting the ion chamber into the ground and then screwing the electret (the radon detector) into the chamber. Each detector was placed at 150-foot (45.7-metre) intervals along the sample line. Each electret starts off with an initial voltage (surface potential). The initial voltage of the electret is measured before it is placed in the field, and then it is measured at the end of each day. The detector is in the field from six to eight hours. As the electret ion chamber is exposed to radon, the surface voltage is reduced on the electret. This reduction in surface voltage is a measure of the time-generated concentration of radon within the environment. Sample points were downloaded into a Garmin 64sr GPS unit and were used to locate the sample sites. At the end of each day, each electret's voltage was measured, and the difference in voltage from the beginning of the day was calculated and entered into a program to process each reading.

Colorado Plateau and Lisbon Valley uranium

The roughly 130,000-square-mile (336,700-square-kilometre) Colorado Plateau hosts the largest uranium province in the United States and one of the largest in the world, having previously produced 597 million pounds to date. Most of the Colorado Plateau uranium deposits are hosted in the Triassic Chinle and Jurassic Morrison formations that formed in mostly arid environments. These deposits are exposed today along cliffs and drainages that transect the plateau, and have been mined for vanadium since 1909 and for uranium since 1946. The two main areas of uranium production were Morrison formation Grants mineral belt in New Mexico and the Chinle formation Lisbon Valley in Utah.

The Chinle formation deposits are located in arcuate belts associated with a series of northwest-southeast-trending anti-clines developed as a result of salt movement in the underlying strata within the Paradox basin. Paleo rivers flowed along each side of these anti-clines with uranium mineralization found within these paleochannels along the lengths of the anti-clines. Lisbon Valley is the type location for Chinle deposits.

Lisbon Valley produced approximately 78 million pounds of triuranium octoxide between 1952 and 1982 from an arcuate belt about 16 miles long by one mile wide with approximately one-third of the belt eroded away postmineral. Individual orebodies ranged from a few hundred pounds to 20 million pounds of U3O8, hosted in the basal Moss Back member of the Triassic Chinle formation along the southwestern flank of the Lisbon Valley anti-cline. A northwest-trending, postmineral normal fault, the Lisbon Valley fault, abruptly cut off and displaced the uranium mineralization associated with the northeastern flank, speculatively dropping it 2,500 feet on the northeastern side of the fault.

The Rio Algom mine produced 13 million pounds at an average grade of 0.25 per cent U3O8 at a depth 2,550 feet on the downfaulted side of the fault, supporting the presence of an arcuate belt on the northeast side of the fault. Oil and gas drilling, largely between 2006 and 2014, on the northeastern down-faulted side of the Lisbon Valley anti-cline located anomalous to extremely anomalous gamma ray readings in the suspected Moss Back member in 28 of 51 holes drilled throughout a northwestern-trending belt 20 kilometres in length by 750 metres in width, outlining the suspected eastern arcuate belt.

Within Atomic Minerals' SLVE property nine widely spaced historic oil and gas wells appear to define the southern end of this 20-kilometre-by-750-metre belt as off-scale radioactivity was recorded within the favourable Chinle formation host rock over widths of 1.8 to 4.5 m (six to 15 feet) from depths of 760 to 880 m (2,495 to 2,890 feet).

The data disclosed in this news release relate to historical drilling. Atomic Minerals has not undertaken any independent investigation of the sampling, nor has it independently analyzed the results of the historical exploration work to verify the results. Atomic Minerals considers these historical drill results relevant as the company will use these data as a guide to plan exploration programs. The company's current and future exploration work includes verification of the historical data through drilling.

R. Tim Henneberry, PGeo (British Columbia) and an advisar to Atomic Minerals, a qualified person under National Instrument 43-101, has reviewed and approved the technical content of the news release.

About Atomic Minerals Corp.

Atomic Minerals is a publicly listed exploration company on the TSX Venture Exchange, trading under the symbol ATOM, led by a highly skilled management and technical team with a proven record in the junior mining sector. Atomic Minerals' objective is to identify exploration opportunities in regions that have been previously overlooked but are geologically similar to those with previous uranium discoveries. These underexplored areas hold immense potential and are in stable geopolitical and economic environments.

Currently, the company's property portfolio contains uranium projects with significant technical merit in three locations known for hosting uranium production in the past. The company has four on the Colorado Plateau, within the continental United States. The plateau has previously produced 597 million pounds of U3O8. The other two recently acquired properties are located in the prolific Athabasca region in Saskatchewan, Canada, and the Mount Laurier property located in Quebec, Canada.

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