The Pogo mine is a gold mine in the state of Alaska.[2] By 31 December 2017 Pogo had produced 3.6 million ounces of gold at a grade of 13.6 g/t. Annual production for 2020 was 205,878 ounces.[1] At 31 December 2019 the mine had Proven and Probable Reserves of 1.5 million ounces of gold at a grade of 7.5 g/t (JORC).[3] It is located 30 miles (48 km) northeast of Delta Junction and 90 miles (145 km) east of Fairbanks.[4] Northern Star Resources Ltd announced in May 2020 that it had entered into an agreement with the Japan-based Sumitomo Metal Mining Co and Sumitomo Corp to acquire the Pogo Gold mine.
The orebody consists of numerous highly irregular quartz veins, ranging in thickness from 2 to 40 ft (0.61 to 12.19 m) with 8 to 20 ft (2.4 to 6.1 m) being typical, and ranging in dip from horizontal to vertical with 30-45 degrees being normal. A complex system of faulting offsets the veins both parallel and perpendicular to the strike, resulting in a "chopped-up" orebody. Until 2019 the mine utilized drift-and-fill and overhand cut-and-fill mining methods when, under new owner Northern Star Resources, the mining method was changed to longhole stoping. Access to the orebody is via decline and spiral ramp. After blasting, ore is trucked to the central underground "ore bin", where it is then fed to a conveyor that takes it out of the mine directly to the mill. Typical daily production is about 2,500 tons of ore yielding approximately 1,000 troy ounces of gold.[5]
Pogo uses a paste backfill system, where 20% of the mine's tailings from which gold has been extracted are mixed with cement and then pumped back underground to support subsequent further excavation. This has the additional environmental benefit of reducing the amount of tailings that need to be stored on surface, minimizing the footprint of the mine's dry-stack tailings storage facility.[6]
Moose incidentedit
On October 5, 2004, during construction of the mine, a large moose with 60-inch (1.5 m) antlers got entangled in newly laid power cables and inadvertently lifted into the air as the cables were tensioned. After retrieval, the moose was in distress and was shot.[7]
Referencesedit
^ ab"Production at top end of guidance, unaudited NPAT of ~A$75M-85M and debt cut by A$125M". Subiaco, WA: Northern Star Resources. 21 January 2021. Retrieved 5 December 2021.
^"Northern Star set for further production growth as Reserves and Resources jump +30%" (PDF). Subiaco, WA: Northern Star Resources. 1 August 2019. Retrieved 2 June 2020.
^"Northern Star acquires the Tier-1 Pogo Gold Mine in Alaska for US$260M" (PDF). Northern Star Resources. Subiaco, WA. 30 August 2018. Retrieved 29 April 2019.
^"Quarterly Activities Report – March 2019" (PDF). Subiaco, Western Australia: Northern Star Resources. 24 April 2019. Retrieved 2 June 2020.
^"Northern Star Pogo Operations Fact Sheet" (PDF). Northern Star Resources Limited. Subiaco, WA. December 2018. Retrieved 30 April 2019.
^"Moose Accidentally "Hangs Out" 50 Feet in the Air". www.montanaoutdoor.com. Retrieved 2021-12-02.
May 07, 2024
pogo, mine, gold, mine, state, alaska, december, 2017, pogo, produced, million, ounces, gold, grade, annual, production, 2020, ounces, december, 2019, mine, proven, probable, reserves, million, ounces, gold, grade, jorc, located, miles, northeast, delta, junct. The Pogo mine is a gold mine in the state of Alaska 2 By 31 December 2017 Pogo had produced 3 6 million ounces of gold at a grade of 13 6 g t Annual production for 2020 was 205 878 ounces 1 At 31 December 2019 the mine had Proven and Probable Reserves of 1 5 million ounces of gold at a grade of 7 5 g t JORC 3 It is located 30 miles 48 km northeast of Delta Junction and 90 miles 145 km east of Fairbanks 4 Northern Star Resources Ltd announced in May 2020 that it had entered into an agreement with the Japan based Sumitomo Metal Mining Co and Sumitomo Corp to acquire the Pogo Gold mine Pogo Gold MineLocationPogo Gold MineLocationDelta JunctionAlaskaCountryUnited StatesCoordinates64 27 0 N 144 54 44 W 64 45000 N 144 91222 W 64 45000 144 91222ProductionProductsGoldProduction205 878 troy ounces 1 Financial year2020HistoryDiscovered1995Opened2006OwnerCompanyNorthern Star ResourcesWebsitewww nsrltd comYear of acquisition2018Orebody and mining method editThe orebody consists of numerous highly irregular quartz veins ranging in thickness from 2 to 40 ft 0 61 to 12 19 m with 8 to 20 ft 2 4 to 6 1 m being typical and ranging in dip from horizontal to vertical with 30 45 degrees being normal A complex system of faulting offsets the veins both parallel and perpendicular to the strike resulting in a chopped up orebody Until 2019 the mine utilized drift and fill and overhand cut and fill mining methods when under new owner Northern Star Resources the mining method was changed to longhole stoping Access to the orebody is via decline and spiral ramp After blasting ore is trucked to the central underground ore bin where it is then fed to a conveyor that takes it out of the mine directly to the mill Typical daily production is about 2 500 tons of ore yielding approximately 1 000 troy ounces of gold 5 Pogo uses a paste backfill system where 20 of the mine s tailings from which gold has been extracted are mixed with cement and then pumped back underground to support subsequent further excavation This has the additional environmental benefit of reducing the amount of tailings that need to be stored on surface minimizing the footprint of the mine s dry stack tailings storage facility 6 Moose incident editOn October 5 2004 during construction of the mine a large moose with 60 inch 1 5 m antlers got entangled in newly laid power cables and inadvertently lifted into the air as the cables were tensioned After retrieval the moose was in distress and was shot 7 References edit a b Production at top end of guidance unaudited NPAT of A 75M 85M and debt cut by A 125M Subiaco WA Northern Star Resources 21 January 2021 Retrieved 5 December 2021 New Ore Deposit Identified in Pogo Gold Mine Alaska USA PDF sumitomocorp co jp 2012 Retrieved 2013 06 23 Northern Star set for further production growth as Reserves and Resources jump 30 PDF Subiaco WA Northern Star Resources 1 August 2019 Retrieved 2 June 2020 Northern Star acquires the Tier 1 Pogo Gold Mine in Alaska for US 260M PDF Northern Star Resources Subiaco WA 30 August 2018 Retrieved 29 April 2019 Quarterly Activities Report March 2019 PDF Subiaco Western Australia Northern Star Resources 24 April 2019 Retrieved 2 June 2020 Northern Star Pogo Operations Fact Sheet PDF Northern Star Resources Limited Subiaco WA December 2018 Retrieved 30 April 2019 Moose Accidentally Hangs Out 50 Feet in the Air www montanaoutdoor com Retrieved 2021 12 02 Retrieved from https en wikipedia org w index php title Pogo mine amp oldid 1189034816, wikipedia, wiki, book, books, library,
