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Canstar Trenching Reveals up to 5% Copper, +30% Zinc in Early Bedrock Spot Analysis, Reveals Semi-Massive Sulphide in Footwall Mineralization
Toronto, Ontario--(Newsfile Corp. - October 16, 2025) - Canstar Resources Inc. (TSXV: ROX) ("Ca...
About this update from Canstar Resources Inc.
[{"type":"text","content":"Canstar Trenching Reveals up to 5% Copper, +30% Zinc in Early Bedrock Spot Analysis, Reveals Semi-Massive Sulphide in Footwall MineralizationToronto, Ontario--(Newsfile Corp. - October 16, 2025) - Canstar Resources Inc. (TSXV: ROX) (\"Canstar\" or the \"Company\") reports that the 2025 trenching program at Canstar's Mary March project, located in Newfoundland's historic Buchans Mining District, has advanced to the final stages. Trenching exposed more than 20 metres of footwall mineralization, containing thin lenses of high-grade base metal mineralization in bedrock. Identification of copper-, lead- and zinc-rich zones is encouraging as they potentially represent the up-dip extension of mineralization first identified in 1999/2000 in drill hole MM-294-03, extending it 130 metres to the surface and 80 metres to the northeast. This discovery further confirms the project's potential to host very high-grade volcanogenic massive sulphide (\"VMS\") mineralization.HighlightsBedrock samples from two trenches4, 125m apart, exposed a strongly mineralized zone containing semi-massive pyrite-sphalerite-galena-chalcopyrite lenses. The presence of these sulphide minerals has been confirmed by various portable X-ray fluorescence device (\"pXRF\") spot analyses, which returned maximum yields up to +30% zinc, 3% lead and 4% copper.1 Analysis of one sample providing readings ranging from 16.9% to 31.57% zinc and 0.17% to 3.08% lead. A separate sample had readings ranging from 0.81% to 4.28% copper.High-grade lenses, containing pyrite-sphalerite-galena-chalcopyrite stringers, occur in a zone of lower-grade footwall mineralization, at least 20 m thick.This style of mineralization closely resembles mineralization intercepted in drill hole MM-294-03, which intercepted 20.6 m grading 3.02% zinc and 1.08% lead.The trenching program produced 130 samples in total, sent for whole rock geochemistry and assaying, the results of which the Company will release when available. This prospect is located 590m west of the Mary March intercept (9.63 metres grading 4.2 g/t gold, 122 g/t silver, 10.1% zinc, 1.8% lead, and 0.64% copper2) and is believed to be part of the same mineralizing system. Mineralized zones occur in proximity to newly mapped chargeability anomalies, strengthening confidence in chargeability surveys for defining drill targets. The Mary March proj...