Mr. John Mirko reports

IP SURVEY ON MYSTERY PROPERTY OUTLINES PORPHYRY TARGETS

Rokmaster Resources Corp. has provided an update on exploration activities on the Mystery property.

In June, SJ Geophysics completed an induced polarization survey over several porphyry copper-(molybdenum plus or minus gold) targets on the Mystery property. The IP survey was a pole-dipole active array capable of investigating chargeability and resistivity down to depths of 300 to 500 metres with the purpose of refining targets planned for drill testing during the fall.

The southern IP survey profile, Line 1000, was completed over the B2 and B3 zones. This area features limited outcrop exposures of strongly potassic-altered andesite hosting a dense stockwork of pyrite-chalcopyrite-biotite-magnetite veinlets that have returned elevated copper, molybdenum and gold in rock sample assays. The IP response shows a strong high-chargeability anomaly cored by a strong high-resistivity anomaly below and southeast of the B2 zone.

Approximately 2.5 kilometres to the northeast, IP Line 2000 investigated a coincident soil and magnetic anomaly in the northern portion of the Ford anomaly area. This area is underlain by rhyolite belonging to the Kasalka group, which displays strong phyllic alteration over a broad area, including intense sericite replacement and disseminated pyrite. Hyperspectral work completed in the previous years indicates that higher-temperature paragonite occurs below a certain elevation in the Ford anomaly area, indicating good potential remains at depth. IP Line 2000 outlined a large and broad high-chargeability anomaly approximately 200 metres below the western portion of the profile, and a deeper highly resistive feature on the eastern end of the profile.

Another approximately 1.1 kilometres to the north of the Ford anomaly, IP Line 3000 tested an area of stockwork quartz veining in sericite- and potassic-altered porphyritic monzonite. This area was discovered last year and rhenium-osmium age dating on the molybdenite mineralization confirmed that it belongs to the productive late Cretaceous Bulkley intrusive suite, which is related to porphyry systems in the region such as the Huckleberry, Ox, Seel and Poplar deposits. IP Line 3000 shows a west-dipping coincident high-chargeability and high-resistivity anomaly, which comes to surface near where the molybdenite mineralization outcrops. Possibly related to Line 2000, there is also a deeper highly resistive feature in the eastern portion of the Line 3000 profile.

Diamond drilling of several of these targets, now refined at depth with the IP survey, is being planned for September to October, 2026. The Mystery property holds an active three-year exploration permit and Rokmaster is fully financed to complete the drilling as planned.

John Mirko, president and chief executive officer, commented: "The IP survey will certainly improve the efficiency of the planned drilling with the specific drill targets now resolved at depth. The Mystery property and the region in general does not offer much outcrop exposure, so we are fortunate to have discovered several occurrences of significant porphyry-style alteration and mineralization. Now the IP survey has detected multiple very encouraging features at the drill targeting scale. The whole team is thrilled with these results, especially on Line 1000, and is excited to get a drill turning on them later this year."

Nechako project

The Mystery property is a part of the company's Nechako project, which totals 28,238 hectares (282 square kilometres) across four properties located in west-central British Columbia. The Nechako project features multiple exploration targets for significant porphyry copper-(molybdenum plus or minus gold) mineralization and high-grade gold-silver vein systems in the southern portion of the productive Stikine terrane. Rokmaster has nurtured the Nechako project for several years, efficiently vectoring toward robust drill targets on the properties, three of which hold active exploration drill permits.

The technical information in this news release has been prepared in accordance with Canadian regulatory requirements as set out in National Instrument 43-101 and reviewed and approved by Ross Polutnik, PGeo, who is independent of Rokmaster and was involved in the survey data collection and geophysical inversions.

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