An updated preliminary economic assessment (PEA) for Rockhaven Resources\u2019 wholly owned Klaza project in the Dawson Range gold belt in Canada’s Yukon Territory outlines a 12-year, combined open-pit and underground operation producing gold and silver dor\u00e9 as well as lead and zinc concentrates.<\/p>\n
With total payable metals production of 750,000 oz. of gold and 13.8 million oz. of silver over 12 years at all-in sustaining costs of $875 per gold-equivalent oz., the after-tax net present value for the project comes in at C$378 million, at a 5% discount rate.<\/p>\n Indicated resources at Klaza stand at 4.5 million tonnes grading 4.8 g\/t gold, 98 g\/t silver, 0.7% lead and 0.9% zinc, containing a total of 907,000 gold-equivalent oz<\/p>\n<\/blockquote>\n<\/figure>\n Based on an average plant throughput of 1,900 t\/d, open pit mining at the site would start in the first year of operations for a three-year period whereas the underground portion would operate over the 12-year life of the combined mine. The initial capital cost figure stands at C$244 million.<\/p>\n \u201cThis study demonstrates that Rockhaven\u2019s Klaza deposit could support a mine with a long life and robust economics,\u201d Matt Turner, the company\u2019s president and CEO, said in a release. <\/p>\n \u201cSince the last economic study was completed in 2016, closer spaced drilling has better defined the upper portions of the deposit, resulting in higher average grades in a superior resource category.\u201d<\/p>\n Turner added that based on the results of this PEA, Rockhaven is now looking to advance Klaza towards a pre-feasibility level alongside continued drilling targeting new discoveries.<\/p>\n The proposed processing flowsheet includes crushing, grinding and milling of the mineralized material, followed by a conventional flotation process to generate lead, zinc and arsenopyrite concentrates. <\/p>\n The arsenopyrite concentrate would be treated with an on-site, 250 t\/d pressure oxidation (Pox) circuit. Precious metals would also be leached from the zinc and lead concentrates.<\/p>\n In the release, Rockhaven highlights the exploration upside at Klaza \u2013 the PEA evaluates the mining of three (out of eleven) known zones of mineralization.<\/p>\n PEA evaluates the mining of three (out of eleven) known zones of mineralization<\/p>\n<\/blockquote>\n<\/figure>\n Indicated resources at Klaza stand at 4.5 million tonnes grading 4.8 g\/t gold, 98 g\/t silver, 0.7% lead and 0.9% zinc, containing a total of 907,000 gold-equivalent oz. Additional inferred resources total 5.7 million tonnes at 2.8 g\/t gold, 76 g\/t silver, 0.6% lead and 0.7% zinc, for a further 725,000 oz. of gold-equivalent. The pit-constrained portion is based on a 1 g\/t gold-equivalent cut-off whereas the underground component is derived using a 2.3 g\/t gold gold-equivalent cut-off.<\/p>\n The 11 known zones of mineralization at the road-accessible Klaza property cover a combined strike length of over 10 km. These are within a 1.8-km wide corridor where low to intermediate sulphidation veins feature gold, silver, zinc and lead mineralization.<\/p>\n Rockhaven\u2019s stock was trading down 10.5% at Tuesday’s close on the TSXV. The company has a C$31.8 million market capitalization.<\/p>\n\n
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