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United States
Pogo Mine

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 Location:
60 km NE from Delta Junction, Alaska, United States

  Address:

P.O. Box 145
Delta Junction
Alaska, United States
99737
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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Cut & Fill
  • Longhole stoping
  • Paste backfill
Production Start...
Mine Life2024


Owners

Source: p. 150
CompanyInterestOwnership
Northern Star Resources Ltd. 100 % Indirect
Northern Star (Pogo) LLC. (operator) 100 % Direct
The Pogo operation is 100% owned by Northern Star Resources.

Contractors

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Deposit Type

  • Vein / narrow vein
  • Intrusion related


Summary:

The Pogo is in the Tintina Mineral Belt, which is a 200 km-wide, 1,200 km-long arc, broadly bounded by the Tintina-Kaltag fault systems to the north and the Denali-Fairwell fault systems to the south. The region contains numerous economic deposits of gold in addition to copper, lead, zinc, silver and tungsten deposits. The lithological units in the Pogo deposit area are dominantly high-grade metamorphic rocks intruded by later felsic to intermediate intrusive units. Key metamorphic rocks include biotite feldspar gneiss, augen gneiss and mafic schist derived from both sedimentary and igneous protoliths. Metamorphic mineral assemblages observed consist of quartz, feldspar, biotite, chlorite, muscovite, sillimanite, andalusite and garnet. The 50km long Goodpaster batholith (granite tonalite-diorite) is the dominant intrusive complex in the district. Locally small felsic to intermediate stocks and dykes are present. The principal mineralisation is hosted in biotite-quartz-feldspar paragneiss and orthogneiss, although all other lithologies are cut. Where the veins cross intrusives, they tend to split and become stockwork zones. Gold at Pogo is predominantly hosted within laminated quartz veins ranging in thickness from <0.5m to >10m. Mineralised veins contain around 3% sulphides (arsenopyrite, pyrite, pyrrhotite, loellingite, chalcopyrite, bismuthinite, sphalerite, galena, molybdenite, tetradymite, maldonite) and a variety of Bi-Pb-Ag sulphosalts. The Pogo gold deposit is an e ........


Mining Methods

  • Cut & Fill
  • Longhole stoping
  • Paste backfill


Summary:

Four portals are in use which provide access to the various underground mining block areas. Mining block areas are named Liese, East Deep, North Zone, X vein, South Pogo and Fun Zone. Portals are named by their approximate elevation on the topography.

The 1525 portal driven in 1996 is the original exploration drive that eventually provided access to the first Liese vein bulk sampling.

After planning and permitting processes were completed the 1875 portal and associated ore body ramp development was constructed in 2005. The 1875 provided access to Liese veins and was driven to connect with concurrent expanded development from the 1525 decline.

The 1650 portal is located a ½ mile down the drainage from 1875 and was driven to support waste haul and exhaust air routing out of mine during development. After major development in the 1650 area was completed in 2006, the 1650 decline was then outfitted with a conveyor to supply mill from a mine ore bin. The main paste backfill system supply pipe from mill to mine was also installed down the 1650 decline.

The 2150 portal and decline are located approximately 1/3 -mile northwest of the 1875 portal area. The 2150 decline was driven starting in 2013 and accessed the East Deep ore body that was defined after the original mine construction.

The mining methods at Northern Star’s Pogo Mine are varied due mainly to variability in vein thickness, dip, grade and continuity and the selectio ........


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits202220212020201920172016
Gold koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required271269
Silver oz
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics20222021202020192017
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required783,505 t
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required796,318 t884 kt
Annual processing capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required0.8 Mt
Daily ore mining rate  ......  Subscription required  ......  Subscription required  ......  Subscription required3,300 tons
Total tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at March 31, 2022:
The Mineral Resources have been reported at a diluted cut-off of 4.1g/t Au (0.12 oz/short ton) inside simulated Mineable Shape Optimiser (MSO) shape at a minimum width of 6ft.

Hill 4021 surface component is reported inside a Whittle floating cone shell at a cut-off of 1.7 g/t (0.05oz/short ton), the 4021 underground component is based on MSO run at 30ft x 30ft x 6 ft and 4.1 g/t (0.12oz/shot ton) reported below the Whittle shell.

CategoryTonnage CommodityGradeContained Metal
Probable 6,590 kt Gold 8.5 g/t 1,800 koz
Indicated 9,572 kt Gold 11 g/t 3,400 koz
Inferred 12,768 kt Gold 9.6 g/t 3,931 koz
Total Resource 22,340 kt Gold 10.2 g/t 7,338 koz

Commodity Production Costs:

Commodity2022202120202019
Credits (by-product) Gold  ......  Subscription required  ......  Subscription required
Cash costs (sold) Gold  ......  Subscription required†  ......  Subscription required†
All-in sustaining costs (sold) Gold  ......  Subscription required  ......  Subscription required
All-in sustaining costs (sold) Gold  ......  Subscription required†  ......  Subscription required†
All-in costs Gold  ......  Subscription required†  ......  Subscription required†
^ Guidance / Forecast.
† Net of By-Product.
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Financials:

Units202220212020201920172016
Growth Capital M AUD  ......  Subscription required  ......  Subscription required
Capital expenditures M 32  USD 20  USD
Revenue M  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Pre-tax Income M  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 102  USD 97  USD
After-tax Income M  ......  Subscription required  ......  Subscription required
EBITDA M  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Operating Cash Flow M  ......  Subscription required  ......  Subscription required
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Heavy Mobile Equipment as of September 1, 2019:
HME TypeSizeQuantity
Drill ....................... Subscription required
Drill (long hole) 76 mm ....................... Subscription required
Loader ....................... Subscription required
Truck (haul) ....................... Subscription required
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 31, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 31, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 11, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 31, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 31, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 31, 2022
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Staff:

EmployeesTotal WorkforceYear
Subscription required 2022
Subscription required 2021
Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required 2017
Subscription required 2016
Subscription required 2015
Subscription required 2014

Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Corporate Presentation 2022
Other 2022
Quarterly Report 2022
Sustainability Report 2022
Year-end Mineral Reserves 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Corporate Presentation 2018
Press Release 2018
Annual Report 2016
Project Description 2016
Annual Report 2015
Other 2015
Project Description 2015
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