Gateway’s first Cowza fresh-rock hit: geometry and mine planning notes
Reviewed by Tom Sullivan

First reported on Australian Mining
30 Second Briefing
Gateway Mining has reported a fresh-rock gold discovery at its Cowza prospect in Western Australia, with the first effective reverse circulation hole CZRC057 returning 41m at 2.0g/t gold from 104m depth. The intercept includes a higher-grade interval of 9m at 7.5g/t from 105m, indicating a potentially robust mineralised zone below previously tested oxide material. For resource modellers and mine planners, the thickness and grade of this initial fresh-rock hit will drive follow-up drilling to define geometry, continuity and potential underground or deeper open-pit scenarios.
Technical Brief
- First “effective” RC hole wording implies earlier holes were either mispositioned, shallow or geologically ineffective.
- Fresh-rock intercept sits beneath previously drilled oxide material, implying a vertical zonation of mineralisation.
- Geometry suggests potential for transitioning from shallow oxide open pit to deeper fresh-rock extraction.
- RC drilling into fresh rock indicates competent ground conditions suitable for high-quality chip logging and sampling.
- Fresh-rock grades provide a basis for initial underground versus deepening-pit trade-off studies at Cowza.
- Follow-up drilling will need tighter spacing around CZRC057 to constrain dip, plunge and true thickness.
- Similar Archaean lode systems in WA commonly require oriented diamond tails after RC to resolve structure.
Our Take
Within our 414 gold‑tagged pieces, shallow to mid‑depth intercepts above 2g/t in Western Australia often underpin scoping or resource upgrade work, so the Cowza prospect numbers are in the range that typically justifies follow‑up step‑out drilling rather than isolated infill holes.
The 9m @ 7.5g/t interval starting around 105m depth sits in the grade range that, in our database, has supported underground ‘sweet spot’ targeting at several WA gold projects, even where broader envelopes are closer to 2g/t.
Gateway Mining’s Cowza prospect adds to a dense cluster of WA project stories in our 1290 Mining items, where operators increasingly pair early high‑grade hits with digital geoscience workflows like those highlighted in the 27 August 2026 piece on integrated AI and automation in Australian mining operations.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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