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United States
Gilmore Expansion Mine

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 Location:
23 km NE from Fairbanks, Alaska, United States

  Address:
PO Box 73726
Fairbanks
Alaska, United States
99707-3726
Phone  ...  Subscription required
Fax(907)-490-2290
WebsiteWeb
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Overview

StatusArchived
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Mine Life6 years (as of Jan 1, 2018)
The Fort Knox Gilmore project continues to progress on schedule and on budget, with initial Gilmore ore encountered in the fourth quarter of 2019 and stacked on the existing Walter Creek heap leach pad. Stripping advanced as planned during the quarter and is expected to continue throughout 2020. Completion of the new Barnes Creek heap leach pad, where 95% of Gilmore ore is expected to be stacked, and related pumping and piping infrastructure, remains on target for completion in the fourth quarter of 2020.

First gold ounces were poured from the new Barnes Creek heap leach pad in January 2021, which is part of the Gilmore project.


Owners

 
CompanyInterestOwnership
Kinross Gold Corp. 100 % Indirect
Fairbanks Gold Mining, Inc 100 % Direct

Contractors

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Deposit Type

  • Mesothermal
  • Vein / narrow vein


Summary:

Gold mineralization at Fort Knox Mine is hosted entirely within the Late Cretaceous (~92 Ma), Fort Knox granite pluton. The contact with the Fairbanks Schist is abrupt. Drilling indicates that the pluton contacts plunge steeply to the north and south and moderately to the east and west. The surface exposure of the pluton is approximately 1,100 m (3,609 ft) in the east-west direction and 600 m (1,969 ft) northsouth.

The Fort Knox Pluton has been subdivided into three phases based on grain-size and textural differences. Intrusion of a biotite-rich fine-grained granodiorite was followed by medium- grained porphyritic granite. The youngest intrusive phase is coarse-grained, porphyritic granite (Bakke, 1995). The texture is dominantly porphyritic, with megacrysts of quartz and k- feldspar, which become more sporadic in the fine- grained phase. The pluton is granite-granodiorite in composition, and the mineralogy of all phases is generally sub-equal amounts of quartz (30%), plagioclase (30-40%), and k-feldspar (20 to 30%) (Bakke, 1995; Blum, 1983).

The major structural trends controlling shear vein orientation and mineralization at the deposit- scale are defined by NW-trending, moderately to shallowly SW-dipping fault zones. The fault zones are typically filled with granulated white quartz, and range in thickness from 0.3 to 1.5 m. The zones have mixed groundmass alteration, with a range of phyllic and argillic alteration assemblages. In the vicinity of the ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Fort Knox Gilmore expansion will be an extension of current operations from 2021 to 2027. The existing operation is a conventional hard-rock open pit using drilling, blasting, loading, hauling and support functions.

Two new pushbacks have been designed and scheduled for the Gilmore expansion area: Phase 9 and Phase 10. Phase 9 contains approximately 156 million tonnes of ore and waste, while Phase 10 contains approximately 230 million tonnes of ore and waste, for a total 386 million tonnes of additional mining.

Initial mining of Gilmore is planned for 2019 as surplus mining equipment capacity is released from the Phase 8 East mining areas. Mining rates increase significantly in 2021 and 2022 as tonnages mined from Phase 8 East decrease. The mining of ore from Phase 9 roughly corresponds to the commissioning of the new Barnes Creek heap leach facility, which is the planned processing destination for the majority of the ore mined from both Phase 9 and 10. Phase 9 contains significant quantities of ore at shallow depths. Some ore mined from Phase 9 in 2019 through 2021 will be processed at the Walter Creek heap leach facility as sufficient capacity would not yet be available at Barnes Creek. Mining of Phase 9 is planned for completion in 2024.

Phase 10 mining is planned to start in 2022 when space and vertical advance constraints restrict the development of the Phase 9 pushback. Phase 10 contains little ore in its higher elevations and ........


Crushing and Grinding


Processing

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Summary:

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Production:

CommodityUnitsLOM (Projected)
Gold M oz 1.5
All production numbers are expressed as metal in doré.


Reserves at December 31, 2017:

CategoryTonnage CommodityContained Metal
Proven & Probable kt Gold 2,072 koz



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 27, 2021
....................... Subscription required ....................... Subscription required Subscription required Oct 27, 2021
....................... Subscription required ....................... Subscription required Subscription required Oct 27, 2021
....................... Subscription required ....................... Subscription required Subscription required Oct 27, 2021
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Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
Feasibility Study Report 2018
Press Release 2018
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