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Grande Portage Announces Gold Recoveries of up to 98.2%
Vancouver, British Columbia--(Newsfile Corp. - November 19, 2019) - Grande Portage Resources...
About this update from Grande Portage Resources Ltd.
[{"type":"text","content":"Grande Portage Announces Gold Recoveries of up to 98.2%Vancouver, British Columbia--(Newsfile Corp. - November 19, 2019) - Grande Portage Resources Ltd. (TSXV: GPG) (OTCQB: GPTRF) (FSE: GPB) (\"Grande Portage\" or the \"Company\") is pleased to announce the results of metallurgical testing recently conducted on samples collected in August, 2019 from the Herbert Gold Project located in southeast Alaska.Highlights include:The combined gravity+flotation gold recoveries on samples #54543 and #54546 were 98.2% and 96.9%, respectively.The grade of sample #54543 averaged 5.04 gpt/gold (0.147 ounces per ton) and 5.0 gpt/silver and sample #54546 averaged 18.09 gpt/gold (0.528 ounces per ton) and 10 gpt/silver (0.292 ounces per ton). Combined gravity+flotation silver recovery (average of two tests each) was 91.7% on sample #54543 and 93% on sample #54546.These two samples were collected from two different veins on the Herbert property and submitted to Bureau Veritas Minerals, Richmond, B.C. for metallurgical testing. Bureau Veritas is independent of the Company. Sample #54543 was taken from a 1.59 meter channel cut perpendicular across the Main Vein outcropping in its west-central portion. The second sample (#54546) was taken from a surface exposure of the Deep Trench Vein near the western end. It consisted of a 1.65 meter channel sample taken with a rock saw perpendicular to the vein. Two process options were tested for each sample, one being the combination of gravity+flotation and the other being gravity+flotation plus cyanidation of the flotation concentrate. Samples for flotation concentrate cyanidation test were ground to a target size P80 105 µm and the gravity+flotation test samples were ground to two sizes-P80 105 and 150 µm. Results showed that both test samples responded extremely well to the cyanidation and the gravity+flotation processes at both grind sizes. Significantly, the simpler gravity+flotation tests (as opposed to the tests with addition of cyanidation of the flotation concentrates) returned better recovery percentages for gold-98.2% vs. 91% and 96.9% vs. 92.6% for samples #54543 and 54546 respectively.Ian Klassen, Grande Portage's CEO remarked, \"These metallurgical results are a very important development for our project. The combined gravity & flotation recovery of gold averaging >99% of the highe...