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Additional metallurgical heap leach column tests were carried out as well as geotechnical, hydrological and environmental studies. An additional 8,600 metres of drilling was completed by year end bringing the total drilled in an 18-month period to 11,650 metres in 126 holes. In June 2018 five drill rigs embarked on a drilling programme to increase the oxide resources. Following mining, metallurgical, infrastructure and environmental studies a Preliminary Economic Assessment ("PEA") on an open pit heap leach solvent extraction and electro-winning ("SX-EW") copper project was also completed in April 2018.
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Then in April 2018 additional contiguous claims were staked to encompass three other old mine workings and the property was expanded to 7.18 km² (1,774.2 acres). In November 2017, an NI 43-101 compliant open pit copper oxide was completed. In 2017 additional drilling was completed on the oxides with the view to generating resources and reserves on which to develop a low capital and operating cost open pit heap leach copper operation to self-finance the exploration of the surrounding area. Other than this, no modern exploration had been carried out on the property or on the surrounding mineralised area. Since the mid-1960 drilling on the 3.31 km² (817.9 acres) property, consisting of patented and unpatented claims, had identified a near surface open pit mineable oxide deposit sitting above the old underground mine workings.
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Management with track record of taking TSX and AIM listed companies from IPO to Mine productionīetween 19 Empire produced direct smelting ore at grades of between 6% and 8% copper and up to 6.6 grammes per tonne gold.Significant exploration upside: less than 1% of potential ore system explored to date (Nigel Maund, consulting geologist, October 2019).Successful recovery of gold achieved from the Empire open pit ore using environmentally friendly ammonium thiosulphate.October 2020 updated resource of 22.9 million tonnes of Measured and Indicated and 10.6 million tonnes of Inferred, containing 129,641 tonnes of copper, 58,440 tonnes of zinc, 10,133,772 ounces of silver and 355,523 ounces of gold.Low-cost Empire oxide open pit mine at Feasibility Study stage to produce copper cathode, gold, silver and zinc.Phoenix completed its AIM IPO in mid-2017, exercised the option and acquired the 80% interest in Konnex. In 2015, Phoenix secured an option to acquire an 80% interest in Konnex Resources Inc, which owned the Empire Mine, Konnex’s only asset. The underground mine was in operation between 1901 to 1942 and was shipping ore at grades of 6% to 8% copper and 6.6 grammes/tonne gold. Phoenix Copper Limited is 80% owner of a past-producing copper, zinc, gold, silver mine - Empire Mine near Mackay in Idaho, USA.