Mexico’s Best Lead-Zinc Drilling Intercepts in 2025

In Mexico lead and zinc accumulations are usually tightly intertwined, although a strong zinc predominance is clear once the concentrations accrue. Lead results were presented for twenty-two drill campaigns by twenty companies, versus twenty-four drill campaigns with zinc results by  twenty-two companies. For lead the best drill intercept is by Southern Silver Exploration at Cerro Las Minitas in Durango, with 10.5 m averaging 11.2% Pb, while for zinc Endeavour Silver presented a best drill intercept of 247 m averaging 2.6% Zn.

Intermediate sulfidation epithermal deposits dominate the table, with thirteen properties: Pitarrilla (Durango), La Colorada (Zacatecas), Los Gatos, (Chihuahua), Alamos Silver (Sonora), Tahuehueto (Durango), El Tigre (Sonora), Don David (Oaxaca), Plomosas-San Marcial (Sinaloa), Cusi (Chihuahua), Columba (Chihuahua), Las Coloradas (Chihuahua), Zacualpan (Estado de México) and La Reyna (Nayarit). Two intermediate sulfidation deposits associated to distal parts of porphyry copper systems include Cristinas (Chihuahua) and Gran Pilar/El Pilar (Sonora). Deposits with both intermediate and low sulfidation epithermal mineralization include Panuco (Sinaloa) and Cruz de Plata (Durango).

Bolivar (Chihuahua) is the only skarn deposit present, but both Cerro Las Minitas (Durango) and La Parrilla (Durango) present both skarn and carbonate replacement deposits (CRD). mineralization. Furthermore, Camino Rojo (Zacatecas) is a complex deposit the presents skarn, CRD and intermediate sulfidation epithermal mineralization. Ana Maria (Durango) and Plomosas (Chihuahua) present both CRD mineralization.

Campo Morado (Guerrero) is the only volcanogenic massive sulfides (VMS) deposit that reported drilling during 2025, but made it to the best intercepts tables of gold, silver, copper and lead and zinc for the year, consistently within the top ten spots.

Mexico’s Best Copper Drilling Intercepts in 2025

During 2025 sixteen companies presented copper results from drilling programs in twenty deposits located in nine states.

By a fair margin the best drill intercept was presented by Torex Gold at its Media Luna East deposit within its Morelos Complex in Guerrero. Although most of copper production in Mexico comes from porphyry copper deposits, in the period only two companies presented results from drilling campaigns in the distal epithermal parts of that type of systems.

Intermediate sulfidation deposits are the most numerous in the table below, particularly in the bottom half, with nine deposits comprised by La Colorada (Zacatecas), Alamos Silver (Sonora), Tahuehueto (Durango), Don David (Oaxaca), Los Gatos (Chihuahua), Plomosas-San Marcial (Sinaloa), El Tigre (Sonora), Pitarrilla (Durango) and La Reyna (Nayarit). Gran Pilar/El Pilar (Sonora) and Cristina are the intermediate sulfidation deposits linked to distal parts of porphyry copper systems.

Skarns systems display the second most common mineralization copper bearing intercepts, comprised by Media Luna East (Guerrero), ELG Underground (Guerrero), Bolivar (Chihuahua, El Limon Sur (Guerrero), and Media Luna West (Guerrero). Cerro Las Minitas (Durango) presents skarn and carbonate replacement deposits (CRD) mineralization, while Camino Rojo displays skarn, CRD and intermediate sulfidation epithermal mineralization.

La Huerta (Jalisco) is the only iron-oxide-copper-gold (IOCG) deposit in the table, and Campo Morado (Guerrero) the only representative of the volcanogenic massive sulfides (VMS) category.

Mexico’s Best Silver Drilling Intercepts in 2025

During 2025 thirty-four companies presented silver results from drilling programs in forty-five deposits located in eleven states.

GoGold Resources tops the table below with a 21.25 m interval averaging 2,077 gpt Ag from Los Ricos South in Jalisco, followed by Palmarejo, Pitarrilla, Plomosas-San Marcial, La Colorada, Campo Morado, La Preciosa, and Don David, all with grade*meter results over 10,000 gpt*m.

Epithermal systems dominate the list, with 34 out of 45 deposits in the list belonging to this category. Intermediate sulfidation epithermal deposits, the most common, include Los Ricos South (Jalisco), Pitarrilla (Durango), Plomosas-San Marcial (Sinaloa), La Colorada (Zacatecas), La Preciosa (Durango), Don David (Oaxaca), Columba (Chihuahua), Alamos Silver (Sonora), Zacualpan (Estado de México), El Tigre (Sonora), Cusi (Chihuahua), Los Gatos (Chihuahua), Tahuehueto, (Durango), Los Reyes (Sinaloa), Las Coloradas (Chihuahua), La Reyna (Nayarit) and Plomosas (Chihuahua). Intermediate sulfidation epithermal deposits with some evidence of low sulfidation mineralization comprise Cruz de Plata (Durango) and Panuco (Sinaloa), while Cristina (Chihuahua) and Gran Pilar (Sonora) are likely intermediate sulfidation epithermal mineralization distal to porphyry copper systems.

Low sulfidation epithermal deposits include Copalquin (Durango), San Dimas (Durango), La Colorada (Sonora), Santa Elena-Navidad (Sonora), Las Chispas (Sonora), Coneto (Durango), Claudia (Durango), Bolañitos (Guanajuato), Santa Elena-Luna (Sonora), Santa Elena-Santo Niño (Sonora), San Ignacio (Guanajuato) and El Cubo (Guanajuato). Palmarejo (Chihuahua), which displays the second-best intercept in second in the table, present mainly low sulfidation mineralization with local intermediate sulfidation style input.

Five of six skarn deposits, Media Luna, EPO, El Limón, ELG Underground and Media Luna West are part of the Guerrero Gold Belt, and only one, Bolívar is in Chihuahua. Cerro Las Minitas in Durango presents skarn and carbonate replacement deposit (CRD) mineralization. La Parrilla in Durango and Camino Rojo in Zacatecas present skarn, CRD and intermediate sulfidation epithermal mineralization styles.

Campo Morado in Guerrero is the only project present in the table that belongs to the volcanogenic massive sulfide (VMS) deposit classification.

Seventy percent of the silver intercepts of the table are sourced in four states: Durango (10), Chihuahua (8), Sonora (8) and Guerrero (6).

#Mexico #Mining #Exploration #Minerals #Silver #Drilling

Mexico’s Best Gold Drilling Intercepts in 2025

During 2025 thirty-two companies presented gold results from drilling programs in forty-three deposits located in eleven states.

Heliostar Metals topped the list with an 83.2 m intercept at Ana Paula that averaged 17.30 gpt Au. Six of the first seven positions in the table below are from deposits located within the Guerrero Gold Belt. These are mostly skarn deposits and include Ana Paula (a complex deposit mineralization-wise), EPO, ELG Underground, El Limón Sur, Media Luna and Media Luna West. Other deposits with skarn affinities include Cerro Las Minitas and La Parrilla in Durango and Camino Rojo in Zacatecas, although also presenting carbonate replacement deposits (CRD) mineralization.

The most numerous deposit types in this table of gold drill intercepts are within the epithermal category, evenly split between the low and intermediate sulfidation divisions. Low sulfidation epithermal deposits include La Colorada (although some doubts remain on this one), Las Chispas, Santa Elena and Cecilia in Sonora; Palmarejo in Chihuahua (with minor local intermediate sulfidation input); Copalquin, Claudia, Coneto and San Dimas in Durango; San Ignacio, El Cubo, Bolañitos and Valenciana in Guanajuato; Panuco (also with intermediate sulfidation epithermal mineralization) and Los Reyes in Sinaloa and Los Ricos South (along with minor intermediate sulfidation mineralization) in Jalisco.

Intermediate sulfidation epithermal deposits in the list comprise Alamos Silver and El Tigre in Sonora; Columba, Cusi, Las Coloradas and Los Gatos in Chihuahua; Cruz de Plata (also with low sulfidation epithermal mineralization), Tahuehueto and La Preciosa in Durango; Plomosas-San Marcial in Sinaloa; La Colorada in Zacatecas; Zacualpan in Estado de México; Don David in Oaxaca and La Reyna in Nayarit. Other two deposits present intermediate sulfidation epithermal mineralization, but are probably distal parts porphyry copper systems: Gran Pilar in Sonora and Cristina in Chihuahua

Campo Morado in Guerrero is the only volcanogenic massive sulfide deposits drilled during 2025 with results published by the companies involved. Geographically, 53% of the deposits with gold results in drilling campaigns are in three states on the north of the country, Sonora, Chihuahua and Durango, while 16% are located in Guerrero.

#Mexico #Mining #Exploration #Minerals #Gold #Drilling

The Mining and Exploration News in Mexico: Highlights on the Third Week of August 2025

By Jorge Cirett

During the 34th week of the year (August 18th to August 24th, 2025), companies working in Mexico presented 33 press releases. One company presented exploration advances on its early-stage property. Five companies presented quarterly reports. Ten companies presented news on financing rounds and share-related issues. Three companies presented drilling results from their advanced properties. One company received a key acceptance of a surface rights agreement. Fifteen companies informed on deals and corporate issues. ON MEXICO ISSUES, The SGM has been given the first orders by the Economy Ministry to perform exploration activities in three projects.  ON EXPLORATION, In Sonora, Questcorp informed on its drill program at La Union. ON MINING, Starcore International Mines, Elemental Altus Royalties, Santacruz Silver Mining, Sailfish Royalty and Sierra Madre Gold and Silver released Q2 2025 results. ON FINANCING, six companies informed on financing rounds: Regency Silver (C$2.5 M, upsized to C$3.1 M), Mammoth Resources (C$980 K), Sonoro Gold (C$525 K), Goldgroup Mining (C$4 M), Pacifica Silver (C$10 M) and Guanajuato Silver Company (C$18 M). Sonoro Gold informed on the terms of a loan. Apollo Silver and Kootenay Silver granted stock options. ON RESOURCES AND DEVELOPMENT, Sonoro Gold received acceptance by the TSX for the surface rights agreement at Cerro Caliche. Avino Silver and Gold reported drilling results from La Preciosa. First Majestic Silver disclosed results from drilling at San Dimas. GR Silver Mining announced drilling results from its Plomosas project. ON DEALS AND CORPORATE ISSUES, Silver Dollar Resources and Canasil Resources informed on their AGMs. Pacifica Silver, United States Antimony, Kootenay Silver, Tocvan Ventures and Colibri Resource announced appointments to the board. Apollo Silver engaged a service provider. Mag Silver informed on its acquisition by Pan American Silver. Reyna Silver and Torex Gold updated on its acquisition by Torex. Xali Gold informed on its status under the TSX and on the cancellation of claims at El Oro. Capitan Silver acquired mining concessions from Fresnillo plc at Cruz de Plata. EV Resources signed an MOU with Wogen Resources and Xcelsior Capital Advisors. Galore Resources updated on its Los Gemelos and Duraznillo projects. ON SOCIAL RESPONSIBILITY, no relevant news

ON MEXICO ISSUES

  • The Economy Ministry (Secretaría de Economía) emitted three exploration orders to the Mexican Geological Survey (Servicio Geológico Mexicano, or SGM). The orders posted In the Official Gazette (Diario Oficial de la Federación) grant the SGM the initial exploration works at Las Granadas (Estado de México), La Soledad (in Durango) and Delia (in Sonora). (Note by the editor.- This is a feeble attempt by the government to try to make function an exploration system depicted in the new mining law that basically is unworkable in any meaningful way, other than that of plain demagogy).   

ON EXPLORATION

  • Questcorp Mining Inc. announced the completion of 25% of the planned 1,200 to 1,500 m drill program at La Union, in Sonora.

ON MINING

  • Starcore International Mines Ltd. announced production results for the first fiscal quarter ended July 2025. At its San Martin mine in Queretaro, the company milled 54.3 K tonnes averaging 1.47 gpt Au, 12.9 gpt Ag, recovering 77.4% Au, 54.8% Ag, to produce 2,130 gpt AuEq. “During the quarter, the CIL (carbon-in-leach) process for carbonaceous ore was fine-tuned and necessary adjustments were made to optimize the process”.
  • Elemental Altus Royalties Corp. announced its operating and financial results for Q2 2025. The company had revenue of US$9.1 M, adjusted revenue of US$105 M, operating cash flow plus Caserones dividend of US$14.4 M, attributable 3,184 Oz Au Eq and adjusted EBITDA of US$8.8 M, with guidance revenue increased to US$35 M to US$40 M (Royalty on Mercedes, Sonora).
  • Santacruz Silver Mining Ltd. reported its financial and operating results for Q2 2025. The company had revenue of US$73.3 M, gross profit of US$25.3 M, net income of US$21.0 M, adjusted EBITDA of US$26.8 M, working capital of US$60.3 M and cash and short and long term investments of US$57.8 M. The company produced 3.55 M Oz AgEq on its mines in Mexico and South America at an AISC of $22.95 per Oz AgEq (Zimapán, Hidalgo).
  • Sailfish Royalty Corp. announced operating and financial results for the second quarter of 2025. During the period Sailfish earned US$626 K in royalties, earning 8 Oz Au, 1,672 Oz Ag from stream interests. Total revenue was US$713.2 K, for a gross profit of US$687 K, net income of US$185.3 K, declaring a quarterly dividend of US$0.0125 per common share (royalty on Gavilanes, Durango).
  • Sierra Madre Gold and Silver Ltd. provided financial results for Q2 2025. During the period the company had net revenue of US$5.36 M, adjusted EBITDA of US$1.46 M and a gross profit of US$1.29 M. At La Guitarra in Estado de México, 41.2 K tonnes were milled, recovering 76.6% Ag, 78% Au, to produce 66 K Oz Ag, 1,001 Oz Au. Sierra Madre closed the first and second tranches of a C$19.5 M brokered private placement during the quarter.

ON FINANCING

  • Sonoro Gold Corp. announced the completion of cash payments of US$3.12 M to a lessor, satisfying the financial obligations in year 1 of the agreement. The company will issue 5 M common shares to the lessor at a deemed issue price of CAD $0.15 Common Share. “Funding for year-1 payment requirements under the Agreement was financed by unsecured shareholder loans aggregating to US $2,900,000 (the “Loans”) by Company directors, bearing annual interest of 10%, plus a 7% lending fee” (Cerro Caliche, Sonora).
  • Apollo Silver Corp. approved the annual grant of 4.41 M stock options, restricted share units and deferred share units to certain employees, officers, directors and consultants (Cinco de Mayo, Chihuahua).
  • Regency Silver Corp. upsized its previously announced best efforts brokered private placement led by Centurion One Capital Corp. for aggregate gross proceeds of up to C$2.5 M (Dios Padre, Sonora).
  • Mammoth Resources Corp. received approval from the TSX Venture Exchange for a final closing for gross proceeds of C$980 K (Tenoriba, Chihuahua).
  • Sonoro Gold Corp. announced a non-brokered private placement offering for gross proceeds of C$525 K (Cerro Caliche, Sonora).
  • Kootenay Silver Inc. announced stock purchase options have been granted to a consultant to purchase up to 250 K shares of Kootenay at a price of $1.19 per common share for a period of two years. (Columba, Chihuahua).
  • Pacifica Silver Corp. closed the first tranche of its previously announced C$10 M non-brokered private placement financing. Participants included Vizsla Silver Corp., First Majestic Silver Corp., Silver Corp. Metals Inc. and 2176423 Ontario Ltd. (Claudia, Durango).
  • Goldgroup Mining Inc. arranged a non-brokered private placement for gross proceeds of up to C$4 M (Cerro Prieto, Sonora).
  • Guanajuato Silver Company Ltd. announced the closing of its previously announced non-brokered listed issuer financing exemption (LIFE) private placement for aggregate gross proceeds of C$18 M. “In connection with the Offering, the Finders received a cash commission of $520,463.92, and 1,727,904 nontransferable finder’s warrants”. Certain directors and officers acquired an aggregate of 2.1 M units for gross proceeds of C$630 K (El Cubo, Guanajuato).
  • Regency Silver Corp. upsized its previously announced best efforts brokered private placement for aggregate gross proceeds of C$3.1 M (Dios padre, Sonora).

ON RESOURCES AND DEVELOPMENT

  • Sonoro Gold Corp. received the final acceptance from the TSX Venture Exchange for the surface rights lease agreement for the Company’s Cerro Caliche Gold Project in Sonora, Mexico.
  • Avino Silver & Gold Mines Ltd. reported results from 1,100 m of drilling in four twin holes at La Preciosa, Durango. The positive results are from La Abundancia and La Gloria veins. Highlighted true width intervals comprise 7.90 m @ 1.92 gpt Au, 1,638 gpt Ag (including 1.84  @ 0.61 gpt Au, 5,006 gpt Ag); 14.80  @ 0.38 gpt Au, 257 gpt Ag (including 5.04 m @ 0.72 gpt Au, 594 gpt Ag); 6.42 m @ 0.46 gpt Au, 544 gpt Ag; 3.45 m @ 0.44 gpt Au, 970 gpt Ag (including 1.17 m @ 0.64 gpt Au, 1,936 gpt Ag); 3.41 m @ 0.36 gpt Au, 398 gpt Ag. “Mineralization at the La Preciosa is hosted within multiple discrete poly-phase quartz veins, often displaying banded, smoky, drusy, and chalcedonic textures. Also, in each stage, there is variably crustiform banded fracture fill/breccia cement mineralogy”.
  • Colibri Resource Corp. congratulated its joint venture partner, Tocvan Ventures Corp., on receiving permit approval for a 50 K tonnes pilot mine facility located in close proximity to the Pilar project, a 49% Colibri – 51% Tocvan joint venture.
  • First Majestic Silver Corp. reported drilling results from its exploration program at the San Dimas mine in Durango. The drilling program is focused in exploring for new veins, expand and upgrade mineral resources, highlighted true width results comprise 0.75 m @ 9.94 gpt Au, 546 gpt Ag; 0.95 m @ 5.35 gpt Au, 302 gpt Ag; 0.89 m @ 7.77 gpt Au, 357 gpt Ag; 5.17 m @ 7.66 gpt Au, 357 gpt Ag; 1.59 m @ 13.07 gpt Au, 762 gpt Ag; 2.12 m @ 8.38 gpt Au, 282 gpt Ag; 3.57 m @ 15.93 gpt Au, 1,112 gpt Ag; 2.35 m @ 4.67 gpt Au, 289 gpt Ag; 1.06 m @ 23.70 gpt Au, 578 gpt Ag; 3.80 m @ 3.27 gpt Au,151 gpt Ag; 2.53 m @ 9.65 gpt Au, 121 gpt Ag.
  • GR Silver Mining Ltd. announced drilling results from its step-out drill program adjacent to the San Marcial deposit mineral resource area within the Plomosas project in Sinaloa. Highlighted core length intervals comprise 11.1 m @ 0.08 gpt Au, 64 gpt Ag; 22.9 m @ 0.06 gpt Au, 11 gpt Ag; 19.9 m @ 0.10 gpt Au, 206 gpt Ag (including 3.7 m @ 0.20 gpt Au, 511 gpt Ag and 4.2 m @ 0.10 gpt Au, 322 gpt Ag). All theses intervals contain between 0.1% to 0.8% Pb and between 0.1% to 0.9% Zn. “Drilling is ongoing with two diamond drill rigs, focusing on the SE Deep Extension target and the Parallel Breccia target.”.

ON DEALS AND CORPORATE ISSUES

  • Silver Dollar Resources Inc. informed that all resolutions put forth at the company’s annual general meeting (AGM), held on August 15, were approved by its shareholders (La Joya, Durango).
  • Pacifica Silver Corp. announced the appointment of Sophie Hsia to the board of directors and released results of its AGM (Claudia, Durango).
  • Apollo Silver Corp. engaged Creative Direct Marketing Group, Inc., an arm’s-length service provider, to provide marketing and advertising services for a total of US$1.62 M, payable in tranches (Cinco de Mayo, Chihuahua).
  • Colibri Resource Corp. announced thatJamie Lavigne has resigned from his position as director of the company. The company appointed Mark Smethurst, P. Geo, MSc, CFA-Level III Candidate, to the Board of Director (EP project, Sonora).
  • Canasil Resources Inc. announced shareholders voted in favor of all matters brought before its annual general meeting (AGM) held on August 7, 2025 (La Esperanza, Durango-Zacatecas).
  • Mag Silver Corp. announced today that, other than Mexican competition approval (COFECE), all required key approvals and authorizations to consummate the acquisition by Pan American Silver Corp. have been obtained. “If the COFECE Approval is obtained and all closing conditions are satisfied or waived, the Arrangement is expected to be completed in the third quarter of 2025. Following completion of the Arrangement, the MAG Shares are expected to be delisted from the Toronto Stock Exchange and NYSE American LLC” (Juanicipio, Zacatecas).
  • United States Antimony Corp. announced the addition of General John M. Keane, as an independent director to USAC’s board of directors (Juarez, Queretaro).
  • Kootenay Silver Inc. appointed Ron Miller as a director of the company (Columba).
  • Reyna Silver Corp. announced the completion of the previously announced plan of arrangement with Torex Gold Resources Inc.. pursuant to which Torex acquired all of the issued and outstanding shares of Reyna Silver (GuiGui, Chihuahua).
  • Torex Gold Resources Inc. announced the completion of the plan of arrangement with Reyna Silver Corp. (Morelos Complex, Guerrero).
  • Tocvan Ventures Corp. appointed Christopher Gordon as head of corporate development (Pilar, Sonora).
  • Xali Gold Corp. filed its audited annual financial statements. “The TSX Venture Exchange (“TSX.V”) is currently conducting a Listing Review of Xali Gold, which is a normal part of the review process after trading has been halted in a Company. The Company is working to resume trading as soon as possible”. The company is trying to overturn the cancellation of several mineral concessions at El Oro, Estado de México.
  • Capitan Silver Corp. executed a definitive agreement to acquire a strategic land package at its Cruz de Plata project in Durango. The property consists of 2,171.4 ha in seven mining concessions adjacent to and surrounding Cruz de Plata. The acquisition from Fresnillo plc involves the payment of an initial US$2 M (paid) and US$2 M payable on or before the second anniversary of the closing, with no royalties or share payments.
  • EV Resources Ltd. executed a try-party memorandum of understanding (MOU) with Wogen Resources Ltd. and Xcelsior Capital Advisors Ltd. Subject to a definitive agreement Wogen and XCLR will engage on a US$2–3 million secured debt facility to advance Los Lirios antimony project in Oaxaca towards production, and Wogen will be granted exclusive rights to offtake antimony products from Los Lirios, and Wogen and XCLR will provide EVR with technical input and market intelligence.
  • Galore Resources Inc. announced that it will host its annual and special general meeting of shareholders on October 23, 2025. The company has received interest in supporting development at Los Gemelos and Duraznillo in Zacatecas; however, recent proposals were not aligned with the long-term interests of shareholders. Discussions with other potential partners remain ongoing. “At Duraznillo, previously announced drilling was suspended due to delays in committed funding, following unforeseen circumstances with an investor group”.

ON SOCIAL RESPONSIBILITY

  • No relevant news.

On the image below: Chlorite-Epidote alteration in quartz monzonite on HQ core. Picture by Jorge Cirett.

Mexico’s Best Lead and Zinc Drilling Intercepts, Second Quarter 2025

Eight companies released lead and zinc results from their drilling programs in Mexico during the second quarter of 2025. The best results for both lead and zinc are from Endeavour Silver’s Pitarrilla project in Durango, with core length intervals of 72.30 m averaging 0.5% Pb and 247.05 m averaging 2.6% Zn.

Six of the eight properties present intermediate sulfidation epithermal mineralization: Pitarrilla in Durango, Don David in Oaxaca, Alamos Silver in Sonora, Columba in Chihuahua, La Reyna in Nayarit and Zacualpan in Estado de México. Cristina in Chihuahua also displays intermediate sulfidation epithermal mineralization, but probably distal to a porphyry copper system. Finally, Campo Morado in Guerrero is a volcanogenic massive sulfides (VMS) deposit, and the only one without epithermal mineralization.

Of note is that the properties are scattered from the northwest of the country in Sonora and Chihuahua to the south in Oaxaca and Guerrero.

Mexico’s Best Copper Drilling Intercepts, Second Quarter 2025

Nine companies released copper results from drilling programs in Mexico during the second quarter of 2025. The best copper intercept is from Axo Copper La Huerta project in Jalisco, with 15.40 m averaging 3.86% Cu. The company presented intervals drilled in in 2020 by another company and from its own 2023 campaign, for a total of 11,441 m. According with the technical report, mineralization is of iron oxide copper gold (IOCG) affinity: “Mineralization at the La Huerta Property is characterized by Cu-Fe sulphides (chalcopyrite and minor bornite), Cu oxides and abundant iron oxides (magnetite and specular hematite). Hydrothermal alteration is represented by sodic-calcic (albite, actinolite, epidote) and potassic (biotite, orthoclase) assemblages with minor chlorite, sericite and late calcite. These deposits occur closely associated with coeval Mesozoic intrusions as we observe in La Huerta …”.

Most copper produced in Mexico comes from porphyry copper deposits, but none of the properties in the table below display that style of mineralization. The El Limón Sur deposit is the second in the list and is part of a skarn system, while the third deposit is a volcanogenic massive sulfides (VMS) system at Campo Morado, both in Guerrero. There are four projects that display intermediate sulfidation epithermal mineralization: Alamos Silver in Sonora, Don David in Oaxaca, La Reyna in Nayarit and Pitarrilla in Durango.

The bottom two projects also present intermediate sulfidation epithermal mineralization, but in their case the mineralization seems to be distal to porphyry copper systems.

Mexico’s Best Silver Drilling Intercepts, Second Quarter 2025

Fifteen companies released silver results from drilling programs in Mexico during the second quarter of 2025. The highest silver intercept was from Endeavour Silver’s Pitarrila project in Durango, with 247 m averaging 129 gpt Ag. The Ag-Pb-Zn mineralization at Pitarrilla developed in at least four veins, two dikes and as matrix replacement in a conglomerate (Manto Pitarrilla) overlying marine sedimentary rocks. “Drilling has confirmed that all structures originate below the marine sediments, extend through Manto Pitarrilla, and into the upper volcanics. These feeder structures remain open at depth”. The drill program is focused in further defining the geometry of the multiple, sub-vertical, mineralized feeder structures and the mineralized manto.

Two other deposits, Columba in Chihuahua and Don David in Oaxaca presented drill intercepts with grade*meter values greater than 5,000. These three deposits, along with Zacualpan, La Reyna, and Alamos Silver are intermediate sulfidation epithermal systems. The Cristina and Gran Pilar projects are also of intermediate sulfidation affinity, but probably distal to porphyry copper centers. Panuco in Sinaloa and (tentatively) La Colorada in Sonora straddle from low to intermediate sulfidation epithermal mineralization, and Santa Elena, Copalquin and El Cubo present low sulfidation characteristics of epithermal mineralization.  Finally, Campo Morado is a volcanogenic massive sulfides (VMS) deposit and El Limón a skarn system. Please note that the projects in the table below are scattered through Mexico from Sonora in the northwest to Guerrero and Oaxaca in the south.  

Mexico’s Best Gold Drilling Intercepts, Second Quarter 2025

Thirteen companies released results from drilling programs in Mexico during the first quarter of 2025. The highest gold intercept was at El Limón-Guajes Underground Sur deposit in Guerrero, with 10.30 m averaging 43.31 gpt Au, including a 2.90 m subinterval over 78 gpt Au. The drilling program was focused on extending the mine life at ELG underground “by identifying new zones of higher-grade mineralization, expanding resources within known areas, and replacing mined reserves”.

Since Q3 of 2024, deposits in the Guerrero Gold Belt, like ELG Underground, characterized by skarn mineralization have shown the highest gold intercepts on each quarter. Campo Morado, also in Guerrero, is part of a volcanogenic massive sulfide (VMS) system, and the only other deposit in the table below that is not of epithermal origin.  

Epithermal deposits compose the rest of the table.  Santa Elena, Copalquin and El Cubo are low sulfidation epithermal systems, Don David, Columba, La Reyna and Alamos Silver belong to the intermediate sulfidation category, while La Colorada (Sonora) and Panuco straddle these two categories. Gran Pilar and Cristina are intermediate sulfidation epithermal systems that are probably distal part of porphyry copper centers.

Summarizing, one deposit shows skarn mineralization, one more belongs to the VMS category, while eleven display low and/or intermediate sulfidation epithermal mineralization.