Mercado Minerals intercepts 828 g/t Ag over 1.00 m at Campanillas vein, Zamora

Vancouver, British Columbia--(Newsfile Corp. - September 2, 2026) - Mercado Minerals Ltd. (CSE: MERC) (OTCQB: MRMNF) (" Mercado " or the " Company ") is pleased to announce initial surface sample results from the Company's first reconnaissance field program at its Zamora project in Sinaloa, Mexico. The ongoing program is focused on verifying historic high-grade results reported by previous operators at the Campanillas Vein and expanding the known zone of mineralization along strike. Surface chip sampling returned multiple high-grade intervals, including 1.00 metre of 828 g/t silver (760 g/t AgEq 1 ) and 1.00 metre of 410 g/t silver with 1.66 g/t gold (497 g/t AgEq).

Highlights:

To date, a 300 metre strike length of the Campanillas Vein has been mapped and sampled at surface

2026 surface sampling has returned 2.40 metres (true width) of 528 g/t silver and 0.75 g/t gold (536 g/t AgEq) including 1.00 metre of 828 g/t silver (760 g/t AgEq) – the highest grade surface composite result (samples G874286, 87 and 88) returned to date at the Campanillas Vein

Surface prospecting and mapping has doubled the known strike length of the Campanillas Vein and encountered wider true widths of mineralized vein and wallrock compared to the underground workings

Table 1. Campanillas Vein Surface Chip Sampling Results 1

1 Silver-equivalent values are calculated assuming typical recoveries based on metallurgical studies conducted on analogous epithermal vein deposits and are not necessarily reflective of metallurgy on the property. No metallurgical work has been reported on the property. The recoveries used are 91% silver, 94% gold, 70% lead, and 75% zinc. The silver – equivalent formula is: ((24 * silver (g/t)*0.91 / 31.1035) + (1900 * gold (g/t)*0.94 / 31.1035) + (0.90 * 2204 * lead %*0.7/100) + (1.10 * 2204 * zinc %*0.75