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Canada
Coffee Project

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 Location:
130 km S from Dawson, Yukon, Canada

  Project Contacts:
1020 800 Pender St W
Vancouver
British Columbia, Canada
V6C 2V6
Phone  ...  Subscription required
Fax604-646-4526
EmailEmail
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  • Fleet
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  • Filings & News

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Overview

StagePermitting
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Processing
  • Heap leach
  • Carbon in column (CIC)
  • Carbon adsorption-desorption-recovery (ADR)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
Mine Life10 years (as of Jan 1, 2016)
Newmont continues to work cooperatively with the Yukon Government, Canada and First Nations to progress development of the Coffee Mine Project. Newmont’s Coffee Mine Project is a proposed open-pit and heap leach gold development project located in west-central Yukon, and it currently going through the Yukon Environmental and Socio-economic Assessment Board’s screening process.
Latest NewsGoldcorp Achieves Significant Project Milestones     September 5, 2018


Owners

 
CompanyInterestOwnership
Newmont Corp. 100 % Indirect

Deposit Type

  • Orogenic
  • Breccia pipe / Stockwork
  • Vein / narrow vein
  • Hydrothermal


Summary:

Coffee is interpreted to represent a shallow-level (epizonal) structurally controlled orogenic gold deposit (Buitenhuis et al., 2015; Allan et al., 2013). Mineralization textures are described below for the four deposits which comprise the Coffee resources and reserves, namely Supremo, Latte, Double Double, and Kona.

Supremo.
Narrow gold-bearing brittle fault structures with gold hosted in intense fracture zones, immature clast supported breccia and in zones of most intense deformation matrixsupported breccia. Mineralization commonly on the margin of and within dacite dykes which intruded along the fracture zones premineralization. Gold mineralization and accompanying quartz-sericite-pyrite alteration associated with later reactivation of structures. Complete oxidation up to 250m below surface.

Latte.
Gold is hosted in zones of brecciation and strong fracturing as well as areas with pervasive sericite alteration and strongly disseminated sulphides. Some high-grade zones associated with quartz vein breccias. Dolomite-illite/sericite-arsenian pyrite sulphidizes foliaform biotite laths. Potential remobilization of gold to other structures. Complete oxidation up to 75m below surface.

Double Double.
Narrow gold-bearing brittle structures hosted in matrix-supported breccia including dacite porphyry fragment breccia. Anastomosing quartz vein networks and microbreccia associated with high-grade. Local intense silicification and strong disseminated sulphide mineralization. Complete oxidation up to 350m below surface.

Kona.
Gold hosted in quartz-sericite altered granite. Iron oxides after disseminated pyrite, pyrite veinlets, stockworks and sooty-pyrite rich shear zones.


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Coffee Gold Project comprises the Latte, Double Double, Supremo and Kona pits which are planned to be extracted by open pit shovel and truck mining methods.

Mining of the deposit is planned to produce a total of 46.4 Mt of heap leach feed and 265 Mt of waste (at a 5.7:1 overall strip ratio) over a nine and a half year mine production life (including one year of preproduction). The current life of mine (LOM) plan focuses on achieving consistent heap leach production rates, and mining of higher value material early in the production schedule, as well as balancing grade and strip ratios.


Crushing and Grinding
Flow Sheet: Source


Processing

  • Heap leach
  • Carbon in column (CIC)
  • Carbon adsorption-desorption-recovery (ADR)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Flow Sheet: Subscription required

Summary:

The gold recovery process was designed on the basis of leaching 5.0 Mt of ore per year with an average gold head grade of 1.45 g/t at an overall gold recovery of 86.3%.

The two-stage crushing plant will operate at a nominal 18,182 t/d throughput, 275 days per year. During the coldest part of the year (January through March) crushing and heap leach pad loading activities will be suspended. The process plant, located near to and down-gradient from the heap leach facility HLF to minimize the pumping and pipeline requirements for pregnant and barren solutions, will operate 365 days per year. The pregnant solution will flow to the plant at a nominal rate of 455 m3 /h and a design flowrate of 600 m3/h. The plant is designed to process 5 t of carbon per day using an absorption, desorption and refining process to extract gold from the pregnant solution to produce the gold doré.

The gold ore processing facilities will include the following unit operations:

Cru ........

Recoveries & Grades:

CommodityParameterAvg. LOM
Gold Recovery Rate, % 86.3
Gold Head Grade, g/t 1.45

Projected Production:

CommodityUnitsAvg. AnnualLOM
Gold koz 2021,858

Operational Metrics:

Metrics
Stripping / waste ratio 5.72 *
Waste tonnes, LOM 265,361 kt *
Ore tonnes mined, LOM 46,356 kt *
Total tonnes mined, LOM 311,717 kt *
Tonnes milled, LOM 46,356 kt *
* According to 2016 study.

Reserves at December 31, 2020:

CategoryTonnage CommodityGradeContained Metal
Measured 1000 kt Gold 2.01 g/t 60 koz
Indicated 54,500 kt Gold 1.19 g/t 2,080 koz
Measured & Indicated 55,500 kt Gold 1.2 g/t 2,140 koz
Inferred 6,800 kt Gold 1.07 g/t 230 koz

Commodity Production Costs:

CommodityUnitsAverage
Cash costs Gold USD 482 / oz *
All-in sustaining costs (AISC) Gold USD 550 / oz *
Pre-tax break-even price Gold USD 707 / oz *
Assumed price Gold USD 1,150 / oz *
* According to 2016 study / presentation.

Operating Costs:

Units2016
OP mining costs ($/t milled) CAD 15.3 *
Processing costs ($/t milled) CAD  ......  Subscription required
Total operating costs ($/t milled) CAD  ......  Subscription required
* According to 2016 study.
Subscription required - Subscription is required.

2016 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M CAD  ......  Subscription required
Sustaining CapEx $M CAD  ......  Subscription required
Total CapEx $M CAD  ......  Subscription required
OP OpEx $M CAD  ......  Subscription required
Processing OpEx $M CAD 230.3
Site services costs $M CAD 45.2
G&A costs $M CAD 134.2
Total OpEx $M CAD  ......  Subscription required
Net revenue (LOM) $M CAD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M CAD  ......  Subscription required
After-tax Cash Flow (LOM) $M CAD  ......  Subscription required
Pre-tax NPV @ 0% $M CAD  ......  Subscription required
Pre-tax NPV @ 5% $M CAD  ......  Subscription required
Pre-tax NPV @ 8% $M CAD  ......  Subscription required
After-tax NPV @ 0% $M CAD  ......  Subscription required
After-tax NPV @ 5% $M CAD  ......  Subscription required
After-tax NPV @ 8% $M CAD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
Pre-tax payback period, years  ......  Subscription required
After-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.

Proposed Heavy Mobile Equipment as of January 6, 2016:
HME TypeModelSizeQuantity
Dozer ....................... Subscription required ....................... Subscription required
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Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Feb 1, 2021
....................... Subscription required ....................... Subscription required Subscription required Feb 1, 2021
....................... Subscription required ....................... Subscription required Subscription required Feb 1, 2021
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
Year-end Mineral Reserves 2018
Annual Information Form 2017
Feasibility Study Report 2016
Subscription required - Subscription is required.

News:

NewsDate
Goldcorp Achieves Significant Project Milestones September 5, 2018

Aerial view:

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