
Barite crystals
By Miguel A Heredia
During the 29th week of the year (July 13th to July 20th 2025), at least 38 press releases were announced by companies working in Mexico, with fifteen disclosing deals and corporate issues, fifteen announcing financing rounds, three reporting resources and developments of their properties, two communicating production results, two informing on exploration results, and one commenting on Mexican issues. ON MEXICO ISSUES, Torex Gold and Minaurum Gold reported the best drilling intercepts in Mexico on the third week of July, 2025. ON EXPLORATION, In Sonora, Minaurum Gold reported drill results from a new vein zone target at the Promontorio Sur within its Alamos project. In Zacatecas and San Luis Potosi, Silver Valley Metals re-initiated exploration at the Mexi-Can Potash-Lithium project. ON MINING, Altius reported Q2, 2025 expected attributable royalty revenue of CAD $12M (Llano de Nogal project, Sonora). Bear Creek reported Q2, 2025 production results from its Mercedes mine in Sonora. ON FINANCING, Vizsla Silver announced that after it completed bought deal offering of 33,334,000 common shares at a price of USD $3 per share, the underwriters have purchased an additional 5,000,100 common shares for gross proceeds of USD $15,000,300 (Panuco project, Sinaloa). Pinnacle arranged a non-brokered private placement for gross proceeds of USD $1.2M (El Potrero project, Durango). Sierra Madre entered into a best offer private placement for gross proceeds of up to USD $10M, which later on it upsized of up to USD $16.5M (La Guitarra mine, Estado de Mexico). Southern Silver announced bought deal LIFE private placement for gross proceeds of CAD $8M, the same that later on it upsized to CAD $13M (Cerro Las Minitas project, Durango). Mammoth upsized its previously announced non-brokered private placement to up to CAD $980K (Tenoriba project, Chihuahua). Roberto Resources announced a non-brokered private placement for gross proceeds of CAD $1M (Claudia project, Durango). Aura Minerals published that it priced and closed its US initial public offering of 8,100,510 common shares at a price of USD $24.25 per share (Aranzazu mine, Zacatecas). Colibri announced that it intends to amend terms of outstanding debentures, warrants, and finder’s options issued in 2023 (Gran Pilar project, Sonora). Capitan Silver generated CAD $6.6M through the accelerated exercise of warrants (Cruz de Plata project, Durango). Garibaldi closed a non-brokered private placement for gross proceeds of CAD $1M (Tonichi project, Sonora). Goldgroup announced a non-brokered private placement for gross proceeds of up to 15,000,000 units at a price of CAD $0.80 per unit for gross proceeds of up to CAD $12M (Pinos project, Zacatecas). Prismo Metals upsized and closed its previously announced private placement for gross proceeds of CAD $575K (Palos Verdes project, Sinaloa). ON RESOURCES AND DEVELOPMENT, Starcore shared an update on its San Juan Nepomuceno or Tortilla project in Queretaro. Orla filed an updated NI 43-101 technical report on Camino Rojo mine in Zacatecas. Torex Gold reported drill results from its EPO deposit within the El Limon Guajes and Media Luna mine complex in Guerrero. ON DEALS AND CORPORATE ISSUES, Apollo Silver entered into an investor relations agreement with Matthews Investments (Cinco de Mayo project, Chihuahua). Vizsla Royalties announced its participation at the Emerging Growth Conference (Panuco project, Sinaloa). US Antimony provided an update on its antimony supply effort for its Madero smelter in Coahuila. GR Silver announced incentive plan grants to eligible persons in accordance with the Omnibus Long-Term Incentive Plan (Plomosas project, Sinaloa). Defiance Silver signed a definitive agreement to acquire all issued and outstanding common shares of Green Earth Metals (San Acacio project, Zacatecas). Almaden announces intention to migrate Canadian stock exchange listing from TSX to TSX Venture Exchange (Ixtaca project, Puebla). Candelaria Mining reported voting results from its annual general meeting of shareholders. Roberto Resources completed the acquisition of the Claudia project in Durango and announced change of its name to Pacific Silver. Pinnacle declared that it has engaged the services of an independent trading group to provide market-making services (Potrero project, Durango). Oroco entered into an option agreement to acquire a 100% interest in the Vainilla mineral concession located in the Choix mining district in Sinaloa. Starcore announced significant corporate developments (San Martin mine, Queretaro). Minera Alamos reported voting results from its annual general meeting of shareholders (Santana mine, Sonora). Almadex announced completion of gold loan repayment by Almaden (El Cobre project, Veracruz). ( ON SOCIAL RESPONSIBILITY, no relevant news.
ON MEXICO ISSUES
- Torex Gold Resources Inc., and Minaurum Gold Inc., reported the best drilling intercepts in Mexico on the third week of July, 2025. Details are shown in the table below:

ON EXPLORATION
- Silver Valley Metals Corp., re-initiated exploration at the Mexi-Can Potash-Lithium project in Zacatecas and San Luis Potosi. The company will be conducting metallurgical studies on potash extraction, focusing on the extraction of sulphate of potash from surface sediments across all salars within the project area; will undertake auger drilling to assess the depth and extents of sedimentary basins across the project´s salars; will initiate hydrological testing to gain a clear understanding of the geochemical and physical properties of near-surface brines across all salars; and will carry out a geophysical program to map subsurface structures and identify high-potential zones for deeper brine targets.
- Minaurum Gold Inc., reported drill results from a new vein zone target at the Promontorio Sur within its Alamos project in Sonora. The 1.5 km-long vein zone is an unmined extension of a 3.5km long Promontorio-Quintera structural-grade vein system trend, with significant historical silver production nearby, which has produced over 70M Oz Ag at Promontorio mine and over 100M Oz Ag at La Quintera mine. Promontorio and Promontorio Sur also indicate a significant skarn/carbonate replacement (CRD) mineralization hosted by limestone in the footwall of the vein zones. The lead-zinc (gold) skarn/CRD event appears to have occurred later than the epithermal silver-copper mineralization and represents a large target. Drilling results are shown in the table below:

ON MINING
- Altius Minerals Corporation reported Q2, 2025 expected attributable royalty revenue of CAD $12M (Llano de Nogal project, Sonora).
- Bear Creek Mining Corporation reported Q2, 2025 production results from its Mercedes mine in Sonora. The company mined 91.945 tonnes and processed 89,488 tonnes of 2.88 g/t Au with a metallurgical recovery of 96% to produce 7,973 Oz Au and 33,932 Oz Ag.
ON FINANCING
- Vizsla Silver Corp., announced that after it completed bought deal offering of 33,334,000 common shares at a price of USD $3 per share, the underwriters have purchased an additional 5,000,100 common shares for gross proceeds of USD $15,000,300. Gross proceeds will be used to advance the exploration and development of the Panuco project in Sinaloa, exploration of the Santa Fe project, which is adjacent to Panuco project, potential future acquisitions, as well as for working capital and general corporate purposes.
- Pinnacle Silver and Gold Corp., arranged a non-brokered private placement of up to 20,000,000 units at a price of USD $0.06 per unit for gross proceeds of USD $1.2M. Net proceeds will be used to advance El Potrero project in Durango, and for general working capital.
- Sierra Madre Gold and Silver Ltd., entered into a best offer private placement of up to 14,290,000 units at a price of USD $0.70 per unit for gross proceeds of up to USD $10M. Later on, the company upsized the previously announced private placement to up to 23,572,000 units at a price of usd $0.70 for gross proceeds of up to USD $16,500,400 Gross proceeds will be used to expand the capacity of the La Guitarra mine, Estado de Mexico, and for working capital and general corporate purposes.
- Southern Silver Exploration Corp., announced bought deal LIFE private placement with a sole underwriter and bookrunner which has agreed to purchase for resale 29,629,630 units at a price of CAD $0.27 for gross proceeds of CAD $8M. Later on, Southern Silver upsized the previously announced bought deal private placement to 48,148,149 units at a price of CAD $0.27 for gross proceeds of CAD $13M. The company plans to use the net proceeds for the advancement of the Cerro Las Minitas project in Durango, as well as for working capital and general corporate purposes.
- Mammoth Resources Corp., upsized its previously announced non-brokered private placement of up to 30,000,000 units at an offering price of CAD $0.025 per unit for gross proceeds of up to CAD $750K to up to 39,000,000 units for gross proceeds of up to CAD $980K. Gross proceeds will be used to advance the Tenoriba project in Chihuahua, to evaluate potential project acquisitions and support working capital needs.
- Roberto Resources Inc., announced a non-brokered private placement of 2,500,000 units at a price of CAD $0.40 per unit for gross proceeds of CAD $1M. Gross proceeds will be used for general working capital and future payables related to the acquisition of the Claudia project in Durango.
- Aura Minerals Inc., published that it priced and closed its US initial public offering of 8,100,510 common shares at a price of USD $24.25 per share. The principal purposes of this offering are to transfer Aura’s principal listing venue to a stock exchange in the US equity market, which the Company believes will increase the liquidity of its common shares, as well as strengthen and diversify its shareholder base through broader access to global capital markets. Aura plans to use the gross proceeds to continue strengthening its business, to provide incremental liquidity and financial flexibility to support the execution of its current strategic growth initiatives, to provide exploration initiatives to expand mineral reserves and resources of its portfolio, and for general corporate purposes (Aranzazu mine, Zacatecas).
- Colibri Resource Corporation announced that it intends to amend terms of outstanding debentures, warrants, and finder’s options issued in 2023. The amendments include extending maturity dates for two years and reducing conversion/exercise prices from CAD $0.50 to CAD $0.25, with an alternative option to convert at CAD $0.15. The amendments include an accelerated expiry clause if the company’s stock price exceeds CAD $0.30 for ten consecutive days, and insider holdings are exempt from certain regulatory requirements. These changes aim to strengthen Colibri’s balance sheet and support its Pilar project development in Sonora.
- Capitan Silver Corp., generated CAD $6.6M through the accelerated exercise of 13,250,000 warrants, with an exercise price of CAD $0.50 (Cruz de Plata project, Durango).
- Garibaldi Resources Corp., closed a non-brokered private placement of 14,401,988 units at a price of CAD $0.07 per unit for gross proceeds of CAD $1M. Gross proceeds will be used for exploration and working capital purposes.
- Goldgroup Mining Inc., announced a non-brokered private placement for gross proceeds of up to 15,000,000 units at a price of CAD $0.80 per unit for gross proceeds of up to CAD $12M. Net proceeds will be primarily dedicated to the diligent assessment and strategic pursuit of acquisition opportunities (Pinos project, Zacatecas).
- Prismo Metals Inc., upsized and closed its previously announced private placement of 5,000,000 to 11,500,000 units at an issue price of CAD $0.05 per unit for gross proceeds of CAD $575K. Prismo intends to use the gross proceeds for general corporate purposes (Palos Verdes project, Sinaloa).
ON RESOURCES AND DEVELOPMENT
- Starcore International Mines Ltd., shared an update on its San Juan Nepomuceno or Tortilla project in Queretaro. The project comprises six mineral claims covering a historical mine with exploration potential. During the due diligence process, Starcore conducted cyanidation tests on samples that averaged 2.15 g/t Au, 968 g/t Ag, 0.01% Cu, 0.4% Pb, and 0.1% Zn, showing gold and silver metallurgical recoveries of 79.85% and 84.75% respectively using the carbon-in-leach (CIL) process, demonstrating effective processing of the mineralized ore. The project with historical mining activity remains open at-depth with substantial lateral extension potential.
- Orla Mining Ltd., filed an updated NI 43-101 technical report on Camino Rojo mine in Zacatecas to include the initial Underground Mineral Resource Estimate.
- Torex Gold Resources Inc., reported drill results from its EPO deposit within the El Limon Guajes and Media Luna mine complex in Guerrero. “Drilling in the northern area of EPO to date in 2025 has been focused on the northern block of the west-northwest La Avispa fault, which controls a dike swarm of an estimated width of 150 to 200 m that represents a discontinuity between the main EPO mineralized zone to the south and its northern extension within the hanging wall of the fault. The current mineralization footprint in the north extends approximately 500 x 200 m with a west-northwest strike that has a significant vertical continuity ranging between 15 m to over 100 m between the interpreted boundaries of the favourable alteration zone that vertically extends for ~200 m. The lateral continuity of the mineralization is defined by the spacing between the dikes that varies from approximately 5 to 35 m, defining several mineralized blocks. Mineralization remains open to the north following the favourable alteration zone “. Drilling highlight are shown in the table below:

ON DEALS AND CORPORATE ISSUES
- Apollo Silver Corp., entered into an investor relations agreement with Matthews Investments to provide Investor Relations services to the company. In consideration, Matthews will receive CAD $7K per month, payable monthly in arrears, for an initial term of three months, with the option for the Company to renew on a quarterly basis thereafter (Cinco de Mayo project, Chihuahua)
- Vizsla Royalties Corp., announced its participation at the Emerging Growth Conference on July 16, 2025, a live interactive online event which will give existing shareholders and the investment community the opportunity to interact with the company´s President and CEO (Panuco project, Sinaloa).
- US Antimony Corporation (USAC) provided an update on its antimony supply effort for its Madero smelter in Coahuila. Last March, 2024, USAC decided to stop their own mining operations in Mexico due to economic and regulatory challenges but continues to build strategic relationships with other companies seeking access to Mexican antimony deposits. Recently, USAC restarted the Madero Smelter in April 2025, following a substantial increase in antimony prices (over 500%). The company is actively negotiating new supplies and contracts, including a definitive agreement with Bolivian suppliers for initial shipments of approximately 10 tonnes, ramping up to 150 tonnes per month by early 2026. Additionally, USAC is exploring other potential sources in Mexico and attracting foreign interest, particularly from Chinese entities, amid limited new concessions from the Mexican government. USAC owns significant assets, including a flotation facility and the only operating smelter in Mexico, which provide strong negotiating leverage.
- GR Silver Mining Ltd., announced incentive plan grants to eligible persons in accordance with the Omnibus Long-Term Incentive Plan. GR Silver granted an aggregate 3,837,205 Performance Share Units (PSU) to certain executive officers of the company (Plomosas project, Sinaloa).
- Defiance Silver Corp., signed a definitive agreement to acquire all issued and outstanding common shares of Green Earth Metals Inc (GEMS). GEMS is a privately held company based on British Columbia with a portfolio of three copper-silver projects in Sonora. Defiance issued an aggregate of 4,954,613 common shares to the shareholders of GEMS at a deemed price of CAD $0.255 per Defiance share in exchange for all issued and outstanding GEMS shares, based on an exchange ratio of one Defiance share for every 4.52 GEMS shares, for a total consideration of CAD $1,263,426 (San Acacio project, Zacatecas).
- Almaden Minerals Ltd., announces intention to migrate Canadian stock exchange listing from TSX to TSX Venture Exchange. In order to complete this migration, the company has applied to voluntarily delist its shares from the TSX, and has received conditional approval from the TSXV to list its shares as a Tier 2 Mining Issuer. Almaden expects the delisting from the TSX to occur at the close of business on August 12, and the listing on the TSXV to commence at the open of business on August 13, 2025 (Ixtaca project, Puebla).
- Candelaria Mining Corp., reported voting results from its annual general meeting of shareholders.
- Roberto Resources Inc., completed the acquisition of the Claudia project in Durango, pursuant to the binding letter agreement previously announced on June 30, 2025. Roberto Resources also announced that it changed its name to Pacifica Silver Corp., “to better reflect its overall business strategy to acquire and advance highly prospective precious metals projects in the Americas”. It also plans to change the symbol of its common shares to “PSIL”.
- Pinnacle Silver and Gold Corp., declared that it has engaged the services of an independent trading group (ITG) to provide market-making services. Under the agreement, ITG will receive compensation of CAD $5K per month, payable monthly in advance. The agreement is for an initial term of one month and will renew for additional one-month terms unless terminated (Potrero project, Durango).
- Oroco Resources Corp., entered into an option agreement through its wholly-owned Mexican subsidiary Minera Xochipala S.A. de C.V., to acquire a 100% interest in the Vainilla mineral concession which surrounds their Santo Tomas Project in Sinaloa by paying an initial USD $75K and 100,000 common shares to Aztec Zinc de Mexico S.A. de C.V., with semi-annual payments of USD $25K and 100,000 common shares thereafter. To exercise the option, Oroco must pay USD $500K and issue 2,000,000 shares. Upon completion, a 1.5% Net Smelter Returns royalty will be granted to third parties, and Xochipala will be responsible for concession duties during the option period. Vainilla covers about 2,974 hectares and hosts multiple mineralized zones, including skarns and breccia pipes, situated along a promising porphyry copper belt. The acquisition enhances Oroco’s control over the region, offering immediate exploration opportunities for copper and related metals, and complements their existing Santo Tomás project both geologically and strategically, supported by local government initiatives.
- Starcore International Mines Ltd., announced significant corporate developments. On July 8, 2025, shareholders will receive one share of EU Gold Mining Inc. for every two shares of Starcore upon approval of the spin-out of exploration interests in Côte d’Ivoire. On July 10, 2025, Starcore secured a ten-year lease for San Juan Nepomuceno, a historical silver mine in Queretaro, gaining access to minerals and surrounding claims in a promising area. On July 14, 2025, the company confirmed its use of carbon-in-leach (CIL) processing technology at the San Martin mine in Queretaro, enhancing mineral recovery, aiming to increase shareholders value, as shown by recent metallurgical tests.
- Silver Storm Mining Ltd., completed its acquisition of Till Capital through a court-approved plan of arrangement, resulting in Till shareholders receiving 16.36 Silver Storm units, with each unit comprising a common share, a warrant, and a contingent value rights (CVRs) tied to a potential sale of a stake in IG Far East LLC (the CVR contingent event). Silver Storm issued 52,211,558 unit shares, 13,052,890 warrants, and 52,211,558 CVRs to former Till shareholders, resulting in a new total of outstanding shares and warrants for Silver Storm. Following the deal, Silver Storm now holds a significantly expanded share structure, and Till’s previous directors and officers have resigned. This arrangement positions Silver Storm to potentially benefit from future asset sales and operational developments.
- Minera Alamos Inc., reported voting results from its annual general meeting of shareholders (Santana mine, Sonora).
- Almadex Minerals Ltd., announced completion of gold loan repayment by Almaden Minerals Ltd. The repayment involves the return to Almadex of 397 Oz Au plus the payment of USD $5,194,354 (El Cobre project, Veracruz).
ON SOCIAL RESPONSIBILITY
- No relevant news.
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, large barite crystals in an intermediate sulphidation epithermal vein system in a project in Chihuahua, Mexico. Photo taken by Miguel A Heredia.











