Mining Americas begins underground development at Copperstone gold project

• Mining Americas has begun underground rehabilitation and development at Arizona’s Copperstone gold project, following a positive construction decision in May 2026.
• Updated Gold Rock resources and an initial Copperstone open-pit resource estimate are planned for the fourth quarter of 2026.
• Gold Rock early works are advancing toward the planned start of stacking and heap leaching later in 2027.
• Cerro de Oro targets updated resources in early 2027 and a pre-feasibility study in the second half, ahead of a potential construction decision.
• Santana has secured new water rights, reducing restart risks, while applications to expand its heap-leach area remain pending.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Mining Americas Inc. published the original content used to generate this news brief on November 09, 2026, and is solely responsible for the information contained therein.