Mammoth Resources Announces Positive Gold-Silver Recoveries at Tenoriba Project
Toronto, Canada — February 5, 2026 — Leads & Copy —
Mammoth Resources Corp. (TSX-V: MTH) has announced positive results from bottle roll tests on oxidized gold-silver mineralized material from its Tenoriba project in Chihuahua State, Mexico. The tests, conducted on a coarser fraction composite sample, showed gold recoveries of 87% and silver recoveries of 67%.
The material was collected from assay reject samples of drill holes from the 2021-22 drill campaign within the Carneritos area.
The gold recoveries compare favorably to previous finer fraction bottle roll testing, which yielded gold recoveries ranging from 75% to 90% and silver recoveries around 65%, according to a November 9, 2023, press release.
According to the company, the majority of the gold and silver leaches within the first 12 hours of a total 96-hour test. The company said that moving to a coarser fraction, 20 times coarser than prior testing, bodes well for what the company can expect from further testing as it advances to small-scale, pilot mineral extraction and heap leach testing as a step towards a future full-scale operation.
Mammoth Resources President and CEO Thomas Atkins said the team is encouraged by the results. He added that such recoveries bode well for the ability to recover gold and silver through heap leach processing in the near-surface, shallow oxidized horizon at Tenoriba.
The company said gold-silver recoveries from the step-up in grain size are ten times coarser than the material previously tested, and the company achieved the same elevated gold-silver recoveries from initial testing. The company believes such recoveries are a good indication of the potential for similar elevated gold and silver recoveries in this material as confirmation tests continue towards pilot and commercial scale production.
The company said that they had similar gold-silver recoveries in initial fine-fraction leach testing from material collected from historical drilling in the large 1,200 by 250 metre Masuparia area at Tenoriba and that the Carneritos area measures approximately 1,500 by 500 metres.
Mammoth is advancing activities at Tenoriba, including confirming locations of higher-than-average grade material in the near-surface oxidized zones for potential extraction and processing in a small, pilot plant-scale operation, column testing of even coarser fraction material from Carneritos as a lead-up to the pilot plant, and seeking an updated quote on a phase one, shallow oxidized horizon drilling to define a maiden mineral resource at Carneritos.
All cyanide bottle roll tests were performed at the SGS Laboratory in Durango, Mexico, supervised by German Alarcon, SGS de Mexico S.A de C.V metallurgist.
Mammoth Resources personnel performed the sample selection under the supervision of Richard Simpson, Vice President of Exploration for Mammoth Resources.
Recommendations for future work include additional metallurgical testing on even coarser-grained, near-surface oxidized and oxidized-transition zone material, possibly in bottle roll tests, or column tests.
The company intends to post a technical report detailing the coarser fraction oxidized material and preliminary sulfide, metallurgical study to its website in the coming days.
Richard Simpson, P.Geo., Vice-President Exploration for Mammoth Resources Corp. is Mammoth’s Qualified Person under National Instrument 43-101 and reviewed all technical data in the release.
German Alarcon, Metallurgist for SGS de Mexico S.A de C.V. is also an experienced metallurgist and a Qualified Person under NI 43-101.
Dr. Efren Perez, PhD Geology, is a consulting geologist and a Qualified Person under NI 43-101.
Mammoth Resources (TSX-V: MTH) is focused on acquiring and defining precious metal resources in Mexico and other mining-friendly jurisdictions in the Americas. The Company holds a 100% interest in the 5,333-hectare Tenoriba gold property in Chihuahua State, Mexico.
Mammoth recently entered into a strategic alliance with RM Mineria S de RL de CV of Mexico in pursuit of additional project development opportunities.
Source: Mammoth Resources
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