06:46 AM EDT, 08/26/2025 (MT Newswires) -- Marimaca Copper ( MARIF ) reported overnight Monday the results of a definitive feasibility study for the Marimaca oxide deposit in Chile.

The study outlined a posttax net present value of US$709 million based on an 8% discount rate, with a 31% internal rate of return and a 2.5-year payback period. Initial capital was estimated at US$587 million.

The project is expected to produce 43,000 tonnes per year of copper over the life of mine.

The study also outlined maiden proven and probable reserves for the project, estimating 178.6 million tonnes with an average grade of 0.42% total copper for 750,000 of contained copper.

"There are very few copper projects with lower capital intensity, and our competitive operating cost profile, positioned in the second quartile of Wood Mackenzie-benchmarked copper projects globally on an all-in-cost basis, drives superior return on invested capital metrics at virtually any copper price," President and CEO Hayden Locke said.

Marimaca said its debt financing workstreams are underway, aiming to identify preferred financing partners by year-end.