Minaurum Alamos silver resource in Mexico: key tonnage and grade notes for mine planners
Reviewed by Joe Ashwell

First reported on MINING.com
30 Second Briefing
Minaurum Silver has reported an inferred mineral resource at its 100%-owned Alamos project in Sonora of 5.37 million tonnes grading 202 g/t silver, 0.21 g/t gold, 0.43% copper, 0.97% lead and 2.01% zinc, equivalent to 320 g/t AgEq and containing 55.2 million oz AgEq. The estimate, which incorporates smelter and processing deductions more typical of advanced studies, is based on 104 drillholes totalling 35,888 m and 10,194 samples across the Promontorio, Travesia and Europa veins. Mineralisation remains open along strike and at depth, with a 50,000 m Phase II drilling campaign under way to expand the resource beyond three of the 26 identified vein zones.
Technical Brief
- Contained metals total 34.8 Moz Ag, 35,640 oz Au, 51 Mlb Cu, 115 Mlb Pb, 238 Mlb Zn.
- Silver-equivalent inventory is reported as 55.2 million ounces AgEq contained.
- Smelter and processing deductions were explicitly applied, aligning inputs with assumptions typical of advanced economic studies.
- Sensitivity analysis shows the resource remains robust at cut-off grades higher than 150 g/t AgEq.
- Database comprises 104 drillholes totalling 35,888.15 m and 10,194 individual samples.
- Current MRE only covers parts of Promontorio, Travesia and Europa, three of 26 mapped vein zones.
- All three modelled vein zones are described as remaining open both along strike and down-dip.
- Phase II drilling (50,000 m planned) is explicitly framed as a resource expansion programme rather than pure exploration.
Our Take
With inferred silver-equivalent of about 55 Moz at Alamos and spot silver recently trading near or above $100/oz in our recent price coverage, even a modest conversion of this resource to reserves could materially re-rate Minaurum Silver relative to single-asset juniors in Mexico.
The polymetallic mix at Alamos (notably copper, lead and zinc alongside silver and gold) provides some hedge against the copper demand softness flagged in Goldman’s survey of a 10–30% decline in fabricator order books, as project economics will not be solely copper-price dependent.
Among the 781 Mining stories in our database, relatively few Mexico and Central America ‘Projects’ pieces report 100% ownership of a multi-vein system like Alamos, which gives Minaurum Silver more flexibility on future financing structures and potential JV or streaming negotiations.
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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