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Vista Gold Corp. Announces Final Leach Test Results at Mt Todd with Average Gold Recoveries Above 90%
DENVER, Aug. 13, 2019 /CNW/ -- Vista Gold Corp. (NYSE American andTSX: VGZ) ("Vista" or the "Company") today announced the completion of its metallurgical testi
About this update from Vista Gold Corp
[{"type":"text","content":"DENVER, Aug. 13, 2019 /CNW/ -- Vista Gold Corp. (NYSE American andTSX: VGZ) (\"Vista\" or the \"Company\") today announced the completion of its metallurgical testing program and reported final leach test results for its Mt Todd gold project located in Northern Territory, Australia. Results of this comprehensive metallurgical program are based on testing completed on 71 samples of material from the Batman deposit, representing various head grades and a wide range of grind sizes. Results confirm: Average gold recoveries are in the low-90% range, compared to 86.4% in the Preliminary Feasibility Study dated effective January 24, 2018 (as defined below); Grinding to 80% passing (P80) 40 microns results in higher gold recoveries across all grade ranges; and Additional higher gold recoveries correlate to higher grade feed material. Frederick H. Earnest, President and Chief Executive Officer, commented, \"We are pleased with the results of the comprehensive metallurgical testing program. The average gold recoveries at a finer grind size continue to reflect the predictable nature of the deposit observed in previous programs. We expect these results to positively impact the economics of the Mt Todd gold project. Our analysis indicates that each 1% improvement in gold recovery results in approximately a 0.6% increase in IRR and a US$27 million increase in the NPV5%. In addition to the improvement in gold recovery, this metallurgical program provides us with the engineering information to make modest changes in the process flowsheet to reflect the finer grind size. We are now focused on completing an updated preliminary feasibility study that will also incorporate current equipment prices, consumable supply costs, and foreign exchange rates. We have hired an independent engineering firm to complete a benchmarking study for our internal use in the review of the preliminary feasibility study results due to be announced later this quarter.\" Metallurgical Testing Program Description and Results The metallurgical testing program was conducted on bulk samples from the Batman deposit with gold grades in the following ranges: greater than 1.5 grams gold per tonne (\"g Au/t\"), 1.0 to 1.5 g Au/t, 0.8 to 1.0 g Au/t, 0.6 to 0.8 g Au/t, 0.4 to 0.6 g Au/t, and less than 0.4 g Au/t (lower than cut-off grade). All samples were HPGR crushed, screene...