Mr. Kenneth MacLeod reports
SONORO GOLD PROVIDES AN UPDATE ON THE ENVIRONMENTAL PERMIT (MIA) FOR THE CERRO CALICHE GOLD PROJECT
Sonoro Gold Corp. has provided an update on the status of the environmental impact statement, or manifestacion de impacto ambiental (MIA) for its Cerro Caliche gold project in Sonora, Mexico. The company has submitted a revised MIA to the Mexican federal permitting authority, Secretaria de Medio Ambiente y Recursos Naturales (Semarnat), to optimize the project's footprint and enhance social and environmental stewardship.
The revised MIA was initially submitted in February, 2025, and supersedes the prior MIA submitted in May, 2022. Revisions to the MIA, including enhancing the mine plan and undertaking additional environmental baseline studies and socio-economic assessments, reflect the company's commitment to bring Cerro Caliche into production while ensuring the project meets the highest social and environmental standards.
Kenneth MacLeod, Sonoro's president and chief executive officer, commented: "The MIA permitting process for the Cerro Caliche project has involved years of extensive technical and environmental studies. These ongoing assessments are carried out not only to ensure the project is meeting Mexico's strict environmental requirements, but they also reflect Sonoro's commitment to the local community."
The MIA details an open-pit, heap leach mining operation, including waste dumps, crushing facilities, heap leach pad, leach solution ponds, gold recovery facilities, haul roads, building structures and infrastructure, as proposed in the company's preliminary economic assessment dated Aug. 28, 2023.
Mining construction and operational activities in Mexico require an approved MIA, as well as ownership of concessions and surface rights. The company holds 100 per cent of the concession rights for the Cerro Caliche project, and, on July 4, 2025, the company announced that it had secured 100 per cent of the surface rights to the Cerro Caliche concessions and surrounding areas.
About the Cerro Caliche gold project
Exploration to date at the 1,400-hectare property confirms a broadly mineralized low-sulphidation epithermal vein structure and over 25 northwest-trending gold mineralized zones along trend and near surface. With only 30 per cent of the property's identified mineralized zones drilled and assayed, the company filed an updated mineral resource estimate (MRE) in March, 2023, based on a total 55,360 metres of drilled data, including 498 drill holes, 17 trenches and assays for 53,865 metres of the drilled data.
In October, 2023, the company filed a new preliminary economic assessment (PEA) demonstrating the potential viability of a nine-year open-pit, heap leach mining operation. Using a gold price of $1,800 (U.S.) per ounce, the project has an after-tax net present value (NPV) discounted at 5 per cent of $47.7-million (U.S.) and an internal rate of return (IRR) of 45 per cent. Using a gold price of $2,000 (U.S.) per ounce, the project has an after-tax NPV at 5 per cent of $77-million (U.S.) and an IRR of 63 per cent.
The PEA was prepared in accordance with the requirements of National Instrument 43-101 by D.E.N.M. Engineering Ltd. and Micon International Ltd., with confirmation of the applicable resource estimates prepared by SRK Consulting (U.S.) Inc.
Qualified person statement
Stephen Kenwood, PGeo, a director of Sonoro, is a qualified person within the context of NI 43-101, and has read and approved this news release.
About Sonoro Gold Corp.
Sonoro Gold is a publicly listed exploration and development company holding the development-stage Cerro Caliche project and the exploration-stage San Marcial project in Sonora state, Mexico. The company has highly experienced operational and management teams with proven records for the discovery and development of natural resource deposits.
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