The Company is currently undertaking a PEA for the Project, which is anticipated to be completed in July 2020. This represents an increase of almost 100% from the MRE released in April 2018 and makes the Project one of the most significant copper oxide discoveries in Chile in the last decade. ![]() Marimaca Copper released an updated Mineral Resource Estimate (“MRE”) for Marimaca of 70 million tonnes, with an average grade of 0.60% total copper, within the Measured & Indicated Categories (approximately 420Kt of contained copper) and 40 million tonnes, with an average grade of 0.52% total copper, within the Inferred Category (approximately 224kt of contained copper) ( refer release on 2 December 2019). Phase 5, which is expected to commence in the 3 rd quarter of this year, will allow us to focus on optimizing a very exciting copper project, as we move into the next phases of study.” ![]() This will provide the Company with a robust geometallurgical model which, in turn, will allow a detailed life of mine analysis of metallurgical recoveries for future studies. The Phase 4 metallurgical program, which is due to be completed later this month and released during the third quarter, will significantly advance our knowledge and provide additional data across many parts of the deposit. “It is also clear that, with the amount of technical work and de-risking milestones achieved already, we are well ahead of a typical PEA stage of development. This means that some of the minor copper bearing minerals, which weren’t initially identified as acid soluble, are also amenable to acid leaching and gives us great optimism for the potential for higher recoveries in an eventual heap leaching operation. Perhaps most importantly, these results exceeded the expected acid solubility ratio of the ore samples tested. The results show recoveries of over 84% of total copper, on average, in laboratory scale testing. “The results have been very pleasing, especially with respect to the materials which approximately comprise the first five years of the potential mine life, which is the all important payback period. For Marimaca, we have already completed multiple phases of test work to assess the deposit’s metallurgical characteristics. “Metallurgy is one of the key de-risking milestones to address in the development of any mining project. Michael Haworth, Executive Chairman of Marimaca Copper commented: Phase 5 test work will commence in Q3 to further refine results from first four phases and address variability across the deposit Tests will include acid leaching with seawater, with and without added chloride ions, conducted in bottle rolls 30cm mini-columns 1.5m columns and in a ROM le ach characterisation for low grade material Includes material from La Atomica and Atahualpa which were outside of the original mine plan Phase 4 test work is underway and expected to be completed later this month with results to be released during Q3 ![]() Indicates leaching recovery, in a heap leach operation, is likely to exceed the acid soluble copper percentage for the mineral sub-zones of Marimaca Average recoveries were 4.8% higher than average acid soluble copper across all samples Average 84% recovery of the total copper was obtained in bottle roll testing completed on ore samples taken from mineral zones comprising the expected early years of mine life The three phases of column and bottle roll test work already completed indicated fast leaching and favourable recoveries, especially in the dominant oxide mineral zones which comprise the majority of the deposit (“Marimaca Copper” or the “Company”) ( MARI.TO) is pleased to provide a summary of the metallurgical test work which has been completed for its flagship Marimaca Copper Project (“Marimaca” or “the Project”), as well as an outline of the current detailed metallurgical work, which is ongoing and is expected to be completed in the current quarter. VANCOUVER, British Columbia, J(GLOBE NEWSWIRE) - Marimaca Copper Corp.
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