Quantum reports zinc at Prophecy Property

Zinc Assays Return up to 22,000ppm Vancouver, BC – TheNewswire - May 28, 2026 – Quantum Critical Metals Corp. (TSX.V: LEAP | OTCQB: ATOXF | FSE: 86A1 ) (“Quantum” or the “Company”) is pleased to report the assay results of a site visit undertaken by the Quantum exploration team on its wholly owned Prophecy zinc prospect.   The Prophecy claims consist of seven mineral tenures totalling 4,349 hectares. All claims are located approximately 240 km northwest of Fort St. John, British Columbia. The Prophecy property region has been explored since the early 1970’s and was optioned by Cominco 1972-73 who completed geological mapping, soil geochemistry, geophysics and drilling.

Historic drillhole logs are available which show several intersections of lead and zinc mineralization; however, assays are not available.   The mineralization of the Prophecy claim region is associated with Mississippi-valley type (“MVT”) vein systems. In late 2025, an airborne site visit was undertaken by Quantum, and sixteen samples were collected from rock outcrop and float locations. Eight samples returned anomalous zinc results from assays as per Table 1 which indicates the samples associated with anomalous zinc results, (ranging from 1,820 ppm to 22,000 ppm Zn).

Anomalous lead ranged from 63 ppm to 5,930 ppm Pb in the same samples with elevated zinc. As per Table 1, barium (Ba) assays returned 27 to 26,900 ppm and strontium (Sr) returned elevated levels from 58 to 5,910 ppm.   Elevated barium and strontium values associated with anomalous zinc and lead assays are consistent with Mississippi Valley-Type (MVT) mineralization. The strong Ba–Sr association possibly reflects barite-bearing hydrothermal fluids and interaction with carbonate host rocks, supporting the interpretation of a basin-brine sourced mineralizing system.

The associ