Mexico’s Best Drilling Intercepts, Third Week of September 2026

Four companies released results from drilling projects in Mexico during the week.

Axo Metals announced results from 29 holes representing approximately 5,000 m of drilling. These are the first resource growth and step out drilling done in the property since its acquisition by the company. The project is within the San Javier mining district in Sonora, displaying clear iron oxide copper gold (IOCG) mineralization.

Capitan Silver reported results from 35 drill holes from its 60,000 m diamond and reverse circulation drill programs at its Cruz de Plata project in Durango. The results are from the three major target areas of the Jesús María Silver Trend, expanding known mineralization to 2.8 km. “The remainder of the 60,000 m program for this area is focused on drilling the strike length of the Jesus Maria Silver Trend to a depth of 500 m vertically from surface with down-dip step outs increasing to 80 to 175 m with diamond drilling. The RC rig is now fully dedicated to drilling newly-permitted targets”. The Jesús María zone presents intermediate sulfidation epithermal mineralization, while the gold resource at Capitan Hill is in a low sulfidation epithermal system.

Kootenay Silver reported assay results from  expansion drilling along the D vein at its Columba project in Chihuahua. “The current exploration work comprises a phased 60,000-metre drill program focused on expanding the resource detailed in the Company’s recent NI 43-101 Mineral Resource Estimate”. Columba contains mineralization with intermediate sulfidation epithermal characteristics.

Americas Gold and Silver announced drill results from the ongoing resource conversion drilling program at the Coslá Complex in Sinaloa. “The assays released are a result of infill and step-out drilling conducted in 1H 2026 at the San Rafael Upper, 120 Upper and 120 Lower deposit”. Mineralization at the property includes exoskarn, endoskarn, carbonate replacement (CRD), mantos and chimneys.

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The Mining and Exploration News in Mexico: Highlights on the Second Week of September, 2026

Brochantite

By Miguel A Heredia

During the 37th week of the year (September 07 to September 13, 2026), at least 32 press releases were issued by companies operating in Mexico, and 1 news published by the media. Of these, twelve related to deals and corporate matters, ten covered resource and development updates, seven presented exploration results, two announced financial activities, one addressed Mexican-related issues, and one reported social issues. ON MEXICO ISSUES, Two alleged members of Los Chapitos arrested for the kidnapping of 10 miners in Sinaloa. ON EXPLORATION, In Sonora, Riverside and its JV Partner Questcorp released assay results from the Phase 2A 2026 core drilling program at the Union project, Zacatecas Silver reported assay results from the second phase of rock chip sampling at its Oso Negro project, Algo Grande announced drill results from its Adelita project, and Tocvan confirmed gold mineralization along El Mezquite trend at its Gran Pilar project. In Nayarit, Miravalles Gold filed an independent technical report for its Fairfield project. In Durango, Pinnacle announced that its ongoing drilling program at El Potrero project has confirmed and extended the previously announced high-grade gold-silver mineralization at the historic Pinos Cuates mine.    ON MINING, No relevant news. ON FINANCING, DynaResource received USD $4M in IVA tax refund.  Goldgroup announced a non-brokered private placement for gross proceeds of up to USD $75M. ON RESOURCES AND DEVELOPMENT, Luca Mining released new assay results from its ongoing drill program at the Tahuehueto project, Durango. Zacatecas Silver announced drill assays from El Cristo drill program in Zacatecas. GR Silver reported that its ongoing 20,000m drill program at San Marcial project, Sinaloa continues to deliver significant drill intercepts confirming extension of mineralization beyond the current mineral resource estimate area. Goldgroup reported strong assay results of the six first drillholes from its ongoing 26,000m drill campaign at its San Francisco mine, Sonora. First Majestic announced positive results from its ongoing 2026 drilling program and expands exploration footprint at San Dimas project Durango. Defiance Silver provided the results on the drilling campaign on the San Acacio resource drilling program on the Zacatecas project. Oroco reported the fourth batch of assay results from its Phase 2 resource drilling program at its Santo Tomas project in Sinaloa. Sierra Madre announced that the twin diesel electric generators have been installed at La Guitarra mine in the State of Mexico. Silver Tiger reported exploration results for the 2026 summer program at its El Tigre project in Sonora. Goldgroup provided an overview of its Oaxaca mining operations and regional land package. ON DEALS AND CORPORATE ISSUES, Starlo Ventures entered into a binding letter of intent to acquire a 100% interest in and to the Margarita project, Chihuahua. Discovery Mining announced the appointment of William Shaver to the Board of Directors, as well as a number of senior appointments and executive promotions. Santacruz received conditional approval from the Toronto Stock Exchange to list its common shares. Americas Gold and Silver, Avino, and Discovery Mining announced that they have been named to the 2026 TSX30™, the Toronto Stock Exchange’s annual ranking of the 30 top-performing companies based on dividend-adjusted share price performance over a three-year period.  Elemental Royalty received approval from Mexico´s antitrust agency with respect to the acquisition of Vizsla Royalties. Guanajuato Silver appointed Colin Bower as Chief Operating Officer. Regency Silver agreed to acquire a 100% interest in the past producing Jabali Gold project, Sonora. GR Silver granted stock options to certain directors, officers, employees, and consultants. Apollo Silver announced a community assembly at which members of the Ejido are expected to vote on lifting the moratorium on mineral exploration and development affecting lands which include the Cinco de Mayo project, which is expected to be held on September 20, 2026. Mining Americas changed its auditor from McGovern Hurley LLP to Ernst & Young LLP. ON SOCIAL RESPONSIBILITY, Algo Grand received a BB rating in its first Digbee ESG assessment, covering both the Company and its 100%-owned Adelita Project in Sonora, Mexico.

ON MEXICO ISSUE

ON EXPLORATION  

  • Riverside Resources Intersects Near-Surface Gold and Base Metal Mineralization at Union Norte and Advances Multiple Targets for Phase 2B Drilling: Riverside Resources Inc
  • Questcorp Defines Near-Surface Gold Discovery Corridor at Union Norte Expanding District-Scale Potential at La Union: Questcorp Mining Inc
  • Zacatecas Silver Expands Oso Negro to Over 3 Kilometres of Mapped Gold-Silver Veins; Phase Two Rock Chip Sampling Returns up to 20.3 g/t Gold and 3,480 g/t Silver: Zacatecas Silver Corp
  • Algo Grande Copper Intersects 30.23 Metres Grading 1.5% CuEq, including 3.55 Metres at 9.4% CuEq and 1.2-Metre Interval at 15.8% CuEq, 100 metres vertical step-out from historical intersects: Algo Grande Copper Corp
  • Tocvan Confirms Gold Mineralization Along Entire 1,300-Metre El Mezquite Trend at Gran Pilar: Tocvan Ventures Corp
  • Miravalles Gold Corp Files NI 43-101 Technical Report for Fairfield Gold Project, Nayarit, Mexico: Miravalles Gold Corp
  • Pinnacle Confirms High-Grade Mineralization in Underground Drilling at El Potrero with up to 58.2 g/t Au and 631 g/t Ag: Pinnacle Silver and Gold Corp

ON MINING

  • No relevant news

ON FINANCING

  • DynaResource Receives US$4.0 Million in IVA Tax Refund: DynaResource Inc
  • Goldgroup Announces US$75 Million Private Placement with US$60 Million already Committed by Leading Natural Resource Investors: Goldgroup Mining Inc

ON RESOURCES AND DEVELOPMENT

  • Luca Intersects 9.9 Metres of 5.39 g/t Gold Equivalent from the Catorce Zone at Tahuehueto Mine: Luca Mining Corp
  • Zacatecas Silver Announces Multiple Silver Assays from El Cristo Drill Program: Zacatecas Silver Corp
  • GR Silver Confirms Extension of Mineralization at San Marcial, Including 16.1 m at 162 g/t Ag and11.7 m at 147 g/t Ag in the SE Area: GR Silver Mining Ltd
  • Goldgroup Reports Strong First Results from 26,000 Metre San Francisco Drill Program: Goldgroup Mining Inc
  • First Majestic Reports High-Grade Drill Results and Expands Exploration Footprint at San Dimas: First Majestic Silver Corp
  • Defiance Silver San Acacio Drilling Returns High Grade Silver; Additional Holes Pending from Lucita Drilling: Defiance Silver Corp
  • Oroco Continues South Zone Success: Oroco Resource Corp
  • Sierra Madre Onsite Power Generation Fully Functional at La Guitarra: Sierra Madre Gold and Silver Ltd
  • Silver Tiger Intersects 2.1 Metres of 7.72 Kilograms Per Tonne Silver Equivalent in the Caleigh Vein Including 0.53Metres of 29.62 Kilograms: Silver Tiger Metals Inc
  • Goldgroup Highlights its Two Producing Mines and Significant Growth Potential Across the Don David Gold Complex in Mexico: Goldgroup Mining Inc

ON DEALS AND CORPORATE ISSUES

ON SOCIAL RESPONSIBILITY

  • Algo Grande Copper Achieves BB Rating in First Digbee ESG Assessment at the Adelita Project: Algo Grande Copper Corp

Content like what you have just read can be seen at https://gambusinoprospector.com/ and at LinkedIn’s Mexico Mineral Exploration Group.

On the picture below, brochantite in a Cu-Au project in Sonora Mexico. Photo taken by Miguel A Heredia.