Adelphi Metals Reports Positive Initial Geological Observations at Brady Sudbury Project

Vancouver, BC – August 27, 2026 – Leads & Copy – Adelphi Metals Inc. (CSE: ADP) announced that initial geological observations from its 2026 summer field program at the Brady Sudbury Project in Ontario are consistent with the company's interpretation of an interconnected, fault-driven IOCG-style mineral system. The project is located on the northeast edge of the Sudbury Basin.

Field crews completed prospecting and sampling across the Marble Mountain, Golden Pine, Black Creek and North River target areas. A total of 215 rock samples have been submitted for gold, copper, platinum, palladium and multi-element analysis, with assay results still pending. Observations from the program suggest that iron-rich rocks, copper minerals, and consistent alteration and structural patterns were found repeatedly across the property, indicating a single interconnected system.

Chalcopyrite, a copper mineral, was identified at eight separate locations on the property. These findings occurred in various settings, including with copper staining in historical trenches, within massive sulphide boulders, and in altered rock along granite contacts. The recurring presence of copper in different rock types and geological contexts was noted as the program's strongest single observation.

Widespread iron-rich geology was also observed, with iron formation found in zones up to four metres wide at multiple locations. Iron sulphide gossans were present in multiple areas and recorded in 40 samples. Altered rock, sulphides along shear zones, and quartz veins with consistent orientations were documented throughout the property.

The company also noted the observation of large units of albite-rich rock across the property. This albite-rich rock may represent sodic alteration, a characteristic feature of IOCG-style systems. The extent and origin of this potential alteration will be evaluated once multi-element assay results are received.

The mineralized areas range from approximately 100 metres across to a corridor measuring about 1.1 by 2.4 kilometres. The nearest copper-bearing zones are located 1.4 kilometres apart. Much of this area is already exposed by historical trenching and stripping, and road access is in place.

Following the completion of surface prospecting and sampling at North River, Adelphi Metals is planning a ground gravity survey. This survey aims to test for dense bodies at depth along the northern extension of the Wanapitei Fault.

“The fieldwork so far has given us exactly what we were looking for at this stage,” said Michael England, CEO of Adelphi Metals. “We went in to test whether the showings at Brady were isolated occurrences or part of something larger. Copper in eight places across different rock types, iron-rich rock in multiple areas and the same structures tying it all together point to a system. The albite-rich units are the ones we're watching most closely; if they turn out to be sodic alteration, that's one of the more diagnostic features an IOCG-style system can show at surface. We look forward to receiving the assay results and to following up this fieldwork with the gravity survey at North River, which will give us our first look at what lies beneath the showings.”

The 2026 field program was designed to test if the showings at Brady are isolated or part of one connected, fault-driven system. The observations are consistent with the latter, showing iron-rich rocks, copper found repeatedly in different rock types, consistent alteration and structural features, and kilometre-scale mineralized ground. The large albite-rich units are a potential indicator of sodic alteration, which typically forms beneath and around copper-gold mineralization in IOCG systems. Assay results are expected to provide grade and metal-association data to further evaluate the model, and the planned gravity survey will test for dense, iron-rich bodies at depth.

Assay results for the 215 rock samples are pending and will be reported and integrated with geological observations. The ground gravity survey at North River will look for dense bodies at depth and help refine priority areas for exploration. Any coherent, structurally controlled gravity anomaly would become a priority drill target. An airborne electromagnetic (VTEM) survey over Marble Mountain, designed to detect buried sulphides along the marble contact, is planned to follow the gravity survey.

The Wanapitei Fault is central to the Brady Sudbury Project, running through the property on the same trend as the fault controlling the past-producing Scadding gold mine. Adelphi views the showings across Brady as the surface expression of one interconnected, fault-driven system. The ground exhibits characteristics of systems forming IOCG and affiliated deposits, including district-scale fault corridors, a breccia mass at Marble Mountain, a specific metal signature, and possible sodic alteration. Iron-rich alteration is associated with gold at Scadding and with copper-gold along the Alwyn trend. Similar systems elsewhere in Canada include the NICO gold-cobalt-bismuth and Sue Dianne copper-gold deposits in the Northwest Territories.

The technical elements of this news release were reviewed and approved by Mr. François Gagnon, P.Geo., a Qualified Person under National Instrument 43-101. Mr. Gagnon is a Geologist with NVNIO, a consulting firm engaged by Adelphi Metals.

Source: Adelphi Metals Inc.