Marimaca Hosts Mejillones Open House; Achieves “A” Rating in 2023 Digbee Sustainability Assessment and Provides Corporate Update

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VANCOUVER, British Columbia, May 22, 2024 (GLOBE NEWSWIRE) -- Marimaca Copper Corp. (“Marimaca Copper” or the “Company”) (TSX: MARI) is pleased to provide project and corporate updates regarding it’s ongoing development strategy to accelerate the Marimaca Oxide Deposit (the “MOD”) toward first production.

Mejillones Community Day

• Successful initial Open House in the community of Mejillones to present the Marimaca Copper Project
• Open-forum format with interactive Q&A with Marimaca management and core team members
• Close to 80 attendees from across the Community
  • Opportunity for Marimaca to present the project development plan and key milestones ahead for 2024 including the planned project permitting submission in Q3 and ongoing Definitive Feasibility Study (“DFS”)
  • Positive initial response from the Community to the Marimaca Copper Project
• Marimaca will continue it’s participatory approach to project development and permitting and looks forward to the next Open House planned for July 2024

2023 Digbee Assessment

• Completion of Marimaca’s third independent ESG performance assessment continues to highlight it’s unique ESG position via the Digbee ESG reporting framework
  • The Digbee framework is designed specifically for the mining sector and endorsed by leading sector and financial stakeholders
• Overall score of “A” awarded for the Company and Marimaca Project, an improvement from the “BBB” score assessed in 2022
• Assessment continues to highlight the significant ESG credential of the Marimaca Project development plan
  • Water – ability to utilize recycled seawater for life-of-mine operations, mitigating any potential groundwater use
  • Leaching operation – no wet tailings discharge required from expected SX-EW processing operation
  • Carbon intensity - No ‘Scope 3’ emissions generated given expected production of copper cathode which does not require smelting and refining of concentrates
  • Simple and transparent land and ownership structure
  • Very favourable access to existing regional infrastructure given the Project’s unique location