Jalisco

Mexico’s Best Silver Drilling Intercepts, Second Quarter 2026

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Nineteen companies released silver results from twenty drilling programs in Mexico during the second quarter of 2026. The highest silver intercept is from GRSilver Mining at the San Marcial deposit within its extensive Plomosas project in Sinaloa, with an impressive 45 m intercept averaging over 1,600 gpt Ag. The interval includes an 8.6 m subinterval over 8,600 gpt Ag on this step-out hole that intercepted the chlorite-hematite rich breccia in the contact between a Jurassic volcanosedimentary unit and Oligocene volcanic rocks. The multi-stage hydrothermal breccias present are overprinted by polymetallic intermediate sulfidation epithermal mineralization.

Over sixty percent of the projects in this table correspond either to intermediate or low sulfidation epithermal mineralization systems. The more numerous are those of intermediate sulfidation affinity, including San Marcial, Cruz de Plata, Zacualpan, Gavilanes, Coplaito, Alamos Silver, Zacatecas Silver, Tahuehueto,  Low sulfidation epithermal systems in the list comprise Copalquín, Terronera and Claudia, while La Colorada (Sonora) adscription remains debatable. Gran Pilar presents characteristics of intermediate sulfidation epithermal affinity, distal to a porphyry copper system.  

The rest of the properties display some of the variety of silver mineralization in the country. Cosalá and Cerro Las Minitas present skarn and carbonate replacement (CRD) mineralization styles, while La Parrill adds intermediate sulfidation epithermal mineralization to that mix and Adelita is a skarn distal to porphyry copper style intrusions. Campo Morado is the only volcanogenic massive sulfides (VMS) property in the table and Santo Tomás is the only porphyry copper deposit. Dios Padre is a strongly zoned breccia associated with porphyry copper style intrusions.

By State, Durango has seven entries in the table, Sonora five and Sinaloa four, while Estado de México, Guerrero, Jalisco and Zacatecas have one each.

Mexico’s Best Gold Drilling Intercepts, Second Quarter 2026

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Companies working in Mexico released results from drilling campaigns in twenty properties during the second quarter of 2026. The highest gold intercept was, again, at Heliostar’s Ana Paula project in Guerrero, with almost 100 m averaging 10.90 gpt Au. Ana Paula is part of the Guerrero Gold Belt, presenting skarn and replacement mineralization with significant gold in sulfide rich breccias, with an uncommon late epithermal overprint. Other projects displaying skarn/replacement mineralization include Adelita (considered as distal to a porphyry copper system) in Sonora and Cosalá in Sinaloa. The only volcanogenic massive sulfides (VMS) deposit in the list, Campo Morado, in Guerrero, attained again the second place with its long multigram gold intervals. The third property in the list, Dios Padre, is characterized by strongly zoned breccias related to porphyry copper style intrusions in the Santa Rosa de Yecora district in Sonora.

Epithermal systems represent over 60 percent of the entries in the table below. Intermediate sulfidation epithermal deposits are the most numerous, although more common in the lower part of the table as these tend to display lower grades. Included in this category are Zacualpan, Copalito, Tahuehueto, Zacatecas Silver, Cruz de Plata, Alamos Silver, San Marcial and Gavilanes. Low sulfidation epithermal deposits include La Colorada? (Sonora), Copalquín, Claudia and Terronera. The question mark on La Colorada arises from some of its characteristics not being that clear (Heliostar geologists disagree on the question mark).

Santo Tomás is a porphyry copper system and San Antonio a clear example of an iron oxide copper gold (ICOG) mineralization system.

Summarizing, thirteen of the twenty properties on the list are epithermal systems, three present some type of skarn mineralization, one is a breccia related to a porphyry copper system, another one a volcanogenic massive sulfides (VMS) deposit, other one a porphyry copper system and one more an IOCG system.

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

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Seven companies announced results from diamond drilling campaigns in Mexico during the week. Since September of 2022 not that many companies had released such number of drilling results on any given week.

Regency Silver returned the highest gold intercept at its Dios Padre project in Sonora. The company is doing step-out holes to define the shape of the mineralized bodies. Dios Padre sits within the Santa Rosa de Yecora district, known for multiple occurrences of breccia bodies related to a Cretaceous-Eocene granodioritic batholith intruding andesitic rocks of the Lower Volcanic Group. The batholith contacts are ragged, with a rough circular shape 20 km across when all its outcrops are accounted for. Mineralization in the district is mainly within breccia bodies (often tourmaline bearing) developed at the contacts or within the intrusive rocks, some of which present porphyry copper style mineralization. At Dios Padre the breccias are strongly zoned with Ag-Cu mineralization in the shallower levels that turn into Cu-Au with depth reflecting the increase of temperature within the system.

Heliostar Metals presented results from drilling the Veta Madre pit area at its La Colorada mine in Sonora. The aim of the program is to expand mineralization to allow for a pit cutback intended to commence on Q3 2026. The company completed a technical report with good although scant descriptions of the mineralization, on which the following paragraphs are included: “The deposit type is not well constrained, and a number of deposit types have been suggested. The El Crestón deposit appears to be situated between possible deeper copper porphyry mineralization and a near-surface epithermal environment. Veta Madre is characterized by the presence of breccias and multi-stage quartz veins, developing crustiform textures, banding, and blade textures. Veta Madre is mostly in an advanced state of oxidation, with occasional fresh pyrite and traces of galena and sphalerite observed. The mineralization is mainly associated with quartz veining that occurs in multiple stages …. Occasionally barite and magnetite are identified …. Silver-rich mineralization is associated with polymetallic veinlets of galena, sphalerite, argentite, and occasionally traces of chalcopyrite.”

Endeavour Silver has completed since 2025 forty-three drill holes totaling 7,015 m on the La Luz system and ten drill holes totaling 1,904 m on the Terrenora vein at its Terronera mine in Jalisco. The program focuses on adding resources and helping with mine development plans. As set on the technical report: “…silver and gold mineralization represents the upper portion of an epithermal vein system. Illite, sericite and adularia are characteristic alteration assemblages that typically occur in the veins and in the vein wall rocks… Metallic minerals include galena, argentite, and sphalerite associated with gangue constituents of quartz, calcite and pyrite … comprises classic, high grade silver- gold, epithermal vein deposits, characterized by low-sulphidation mineralization and adularia-sericite alteration”.

Mercado Minerals released results from its 3,000 m inaugural drill program at its Copalito project in Sinaloa. The present news report on holes extending the mineralization footprint of the 5 Señores vein, and the first holes on El Agua vein. Mineralization has been described as of intermediate sulfidation epithermal character.

Impact Silver announced new drill results on the north extension of the Carlos Pacheco vein system at its Nochebuena mine in Estado de México. “Surface drill results reported in this news release are additional holes on the north extension of the Carlos Pacheco Vein and its splay veins for 150m north of the active mine workings …” According to the 2005 technical report, “Silver mineralization at Zacualpan is of the class known as silver-rich intermediate sulphidation epithermal vein deposits.”

Capitan Silver reported additional results from eight holes of the 60,000 m drill program at its Cruz de Plata project in Durango. Current drilling is extending mineralization downdip on the Jesús María trend. Mineralization on the Jesús María trend presents characteristics of intermediate sulfidation epithermal systems, whereas the Capitan Hill zone mineralization is more akin to low sulfidation epithermal systems.

Oroco Resource reported assay results from its phase 2 resource definition drilling program, focused on the South Zone of its Santo Tomás project in Sinaloa. “Phase 2 is designed primarily to convert Inferred resources to the Indicated resource classification in the South Zone and to collect geotechnical, hydrogeological, and additional metallurgical data required for Pre-Feasibility Study (“PFS”) level mine-planning”. Santo Tomás is a porphyry coppery system with gold and molybdenum credits.

#Mexico #Exploration #Drilling #Gold #Silver #Copper #Lead #Zinc

The Mining and Exploration News in Mexico; Highlights on the Second Week of June 2026

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By Jorge Cirett

During the 24th week of the year (June 8th to June 14th, 2026), 26 companies working in Mexico posted press releases. Three companies informed about early-stage property work and one company poured its first doré. Two companies joined an additional Index, one company announced a normal course issuer bid, one more announced a dividend, and another the closing of a private placement. One company secured construction permits for an underground mine, one more announced the arrival of another drilling rig, two companies released drill results on their advanced projects, and another one announced a fatality on an advanced project. Nine companies presented deals and corporate issues. ON MEXICO ISSUES, LitioMx was obliged to present information on its budget and exploration activities after the institution had reject to do so on grounds of National Security (the preferred method applied by the actual and past federal administrations to evade the obligation to disclose information). The US$0.81 M annual budget was 97% applied on salaries for 17 employees, and no budget was allocated to any specific project. EXPLORATION, in Sonora, Questcorp Mining and Riverside Resources are to commence a phase 2 drilling campaign at La Unión. In Oaxaca, EV Resources informed on geophysical targeting at Los Lirios. ON MINING, Silver Storm Mining conducted the first doré production at La Parrilla. ON FINANCING. Altius Minerals is to join the S&P/TSX Composite Index, and Coeur Mining the S&P MidCap 400 Index. Elemental Royalty announced an issuer bid. Salifish Royalty declared a dividend. Sonoro Gold closed an oversubscribed private placement. ON RESOURCES AND DEVELOPMENT, GoGold Resources obtained the final permits for construction of the Los Ricos South underground mine. Capitan Silver announced the arrival of an additional rig at its Cruz de Plata project. Mithril Silver and Gold released drilling results from its Copalquín project. Kootenay Silver announced a fatality at its Columba project. Pacifica Silver reported drilling results from its Claudia project. ON DEALS AND CORPORATE ISSUES, Avino Silver & Gold Mines announced key appointments. Heliostar Metals and Zacatecas Silver announced the closing of the definitive option agreement on non-core Heliostar properties. Silver Spruce Resources announced management changes and the grant of options. Americas Gold and Silver closed on an agreement to settle silver and gold delivery obligations. Luca Mining provided an operations and corporate update. First Majestic reported on its AGM. Galore Resources provided an update on the Dos Santos project. Capitan Silver informed on its AGM results. ON SOCIAL RESPONSIBILITY, Santacruz Silver published its 2025 sustainability report for its Mexican operations (Zimapán, Hidalgo).

ON MEXICO ISSUES

  • LitioMx was forced to provide information on exploration, budget and activities. Most (97%) of the 0.81 M annual budget was applied on salaries, while no budget was allocated to any specific project: News on Mexico  

ON EXPLORATION

  • Questcorp Commences Fully Funded Phase 2 Drill Campaign at La Union Targeting Gold-Silver Carbonate Replacement District Potential: Questcorp Mining  (La Unión, Sonora)
  • Riverside Resources and Questcorp Announce Commencement of Phase 2 Drilling at Union Project, Sonora, Mexico Riverside Resources (La Unión, Sonora)
  • EV Resources: Geophysics Reveals New Targets and Increased Scale Potential at Lirios 1 EV Resources (Los Lirios, Oaxaca)

ON MINING

  • Silver Storm Conducts First Pour of Silver-Gold doré at La Parrilla: Silver Storm Mining (La Parrilla, Durango)

ON FINANCING

  • Altius Minerals Corporation to Join the S&P/TSX Composite Index: Altius Minerals (royalty on Cuale, Jalisco)
  • Coeur Mining to Join S&P MidCap 400 Index: Coeur Mining (Las Chispas, Sonora)
  • Elemental Royalty Announces Normal Course Issuer Bid Elemental Royalty (royalty on Mercedes, Sonora)
  • Sailfish Royalty Declares Q2 2026 Dividend: Sailfish Royalty (Royalty on Gavilanes, Durango)
  • Sonoro Gold Announces Closing of Oversubscribed $15.5 M Private Placement: Sonoro Gold (Cerro Caliche, Sonora)

ON RESOURCES AND DEVELOPMENT

  • GoGold Achieves Major Milestone: Final Remaining Permits Secured and Construction Approved for Los Ricos South Underground Mine: GoGold Resources (Los Ricos South, Jalisco)
  • Capitan Silver Announces Arrival of 4th Drill Rig at the Cruz De Plata Project Capitan Silver (Cruz de Plata, Durango)
  • Mithril Drills 4.01 g/t Gold, 225 g/t Silver Over 7.25 M Including 15.25 g/t Gold, 533 g/t Silver Over 0.5 m at Target 1, Copalquin Mithril Silver and Gold (Copalquín, Durango)
  • Kootenay Reports Incident at Columba Silver Project: Kootenay Silver (Columba, Chihuahua)
  • Pacifica Silver Reports Strong Gold-Silver Intercepts at Claudia Project and Extends Justina Vein to 600 Metres in Strike Length: Pacifica Silver  (Claudia, Durango)   

ON DEALS AND CORPORATE ISSUES

  • Avino Announces Key Senior Executive Appointments: Avino Silver & Gold Mines  (Avino and La Preciosa, Durango)
  • Heliostar Announces Closing of Option Agreement with Zacatecas Silver for Non-Core Properties Heliostar Metals (Ana Paula, Guerrero)
  • Zacatecas Silver Enters into Definitive Option Agreement to Acquire MultiAsset Exploration Portfolio from Heliostar Metals Zacatecas Silver (Esperanza, Morelos)
  • Silver Spruce Resources, Inc. Announces Management Changes and Option Grants Silver Spruce Resources (Pino de Plata, Chihuahua)
  • Americas Gold and Silver Closes Previously announced Agreements to Settle Silver and Gold Delivery Obligations Americas Gold and Silver (Cosalá, Sinaloa)
  • Luca Mining Provides Operations and Corporate Update: Luca Mining (Campo Morado, Guerrero)
  • First Majestic Announces Voting Results from 2026 Annual General Meeting First Majestic Silver (San Dimas, Durango)
  • Galore Provides Corporate Update on Dos Santos Project, Concessions, Legal Developments, Concession Regularization and Shareholder Financing: Galore Resources (Dos Santos, Zacatecas)
  • Capitan Silver Announces Results of Annual General and Special Meeting of Shareholders: Capitan Silver (Cruz de Plata, Durango)

ON SOCIAL RESPONSIBILITY

  • Santacruz Silver Announces Publication of 2025 Sustainability Report for Mexican Operations Santacruz Silver Mining  (Zimapán, Hidalgo)

On the image below: Epithermal quartz veining and pyrite in volcanosedimentary rocks, HQ core. Picture by Jorge Cirett.