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Viva Gold Provides Update on Tonopah Gold Project and Filing of NI43-101 Technical Report
VANCOUVER, British Columbia, March 28, 2018 (GLOBE NEWSWIRE) -- Viva Gold Corp. (TSX-Venture:VAU) (the “Company” or “Viva”) is pleased to provide an update on t
About this update from Viva Gold Corp
[{"type":"text","content":" VANCOUVER, British Columbia, March 28, 2018 (GLOBE NEWSWIRE) -- Viva Gold Corp. (TSX-Venture:VAU) (the “Company” or “Viva”) is pleased to provide an update on the Tonopah Gold Project and the filing of a NI43-101 Technical Report and Mineral Resource estimate for the project, located on the prolific Walker Lane Trend of Western Nevada, about 20 miles north and east of the town of Tonopah, Nevada. Metallurgical Test WorkA series of initial metallurgical tests were conducted at Resource Development Inc.’s lab in Lakewood, Colorado, an independent metallurgical testing laboratory. The results of this work demonstrate that good gold recoveries can be achieved through leaching, potentially providing a much larger tonnage potential for the project. Additional testing will be required to optimize crush/grind size versus recovery. Testing was conducted on two mineralized composite samples representing the major argillite (“OPA”) and tertiary volcanic (“TV’) rock types at the Tonopah project. These rock-type samples represent the lower grade halo around the higher grade mineralized zones. “These results are very positive, demonstrate leachability and provides a solid direction for future analysis. Cost-benefit studies will be required to analyze the best economic process options for the project by looking at the trade-off between an increased gold recovery at a faster recovery rate as a revenue driver versus reducing capital and operating costs by accepting a lower gold recovery over a longer period of time as a result of using a larger particle crush/grind size. The presence of free gold at Tonopah, which has been shown to be amenable to gravity recovery methods in past test work, will also need to be considered in the analysis”, stated James Hesketh, President & CEO. The samples tested were assembled from a number of core intercepts from the Company’s core inventory, averaging between 0.5 and 1.0 gram per tonne (“g/t”) grade. Assayed head grade for the TV sample was 0.88 g/t gold and 0.72 g/t for the OPA sample. The samples were subject to static bucket leach tests for a nominal 1-inch crush material size and bottle roll tests for material ground to nominal 6-mesh and 200-mesh sizes. Results from this work are shown in the following table: Composite Particle Size Leach Time Gold Extr...