Nineteen companies released silver results from eighteen drilling programs in Mexico during the first quarter of 2025. The highest silver intercept is from Mithril Silver and Gold’s Copalquin project in Durango, with 4.95 m averaging 1,833 gpt Ag, including a 0.55 m subinterval just over 7,500 gpt Ag. Mithril focused the drilling in Q1 2025 on Target1, intending to update the maiden resource on El Refugio/El Cometa and La Soledad areas, released in 2021. In April the company will start drilling on Target 2 with a second rig.
Although the silver results during this quarter are not as impressive as those achieved in 2024 (https://gambusinoprospector.com/2025/01/13/mexicos-best-silver-drilling-intercepts-in-2024/), they are still significant, with four projects yielding grade*meter values greater than 5,000.
A low sulfidation epithermal mineralization system is at the top of the table, and although that is not always the case, most times an epithermal system carries the highest silver values on any given period in Mexico. Of the eighteen projects, fourteen are thought to be of some variation of epithermal mineralization. Copalquin, San Dimas and Coneto in Durango, Santa Elena in Sonora and Bolañitos in Guanajuato display low sulfidation epithermal mineralization. La Colorada in Sonora is tentatively placed on this type of mineralization by now. Los Reyes in Sinaloa straddles the low and intermediate sulfidation categories. Alamos Silver and El Tigre in Sonora, Columba in Chihuahua, Tahuehueto in Durango and Zacualpan in Estado de Mexico show intermediate sulfidation mineralization. Two projects, Gran Pilar/El Pilar in Sonora and Cristina in Chihuahua are special cases where intermediate sulfidation epithermal mineralization might be distal to porphyry copper systems.
In the remaining four projects mineralization is intimately related to causative intrusions into sedimentary packages. La Parrilla in Durango displays carbonate replacement, skarn and intermediate sulfidation epithermal mineralization. At Media Luna in Guerrero silver is an accessory to gold-copper skarn mineralization in and around intrusive bodies and dikes. Skarn alteration and mineralization is developed around an intrusive plug at Cerro Las Minitas in Durango, and skarn mineralization probably related to a porphyry system is developed in a package of sedimentary rocks at Bolivar, deep in the Sierra Madre of Chihuahua.
