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Canada
Greenwood Project (Lexington)

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 Location:
7.7 km E from Greenwood, British Columbia, Canada

  Project Contacts:
#900-525 Seymour Street
Vancouver
British Columbia, Canada
V6B 3H7
Phone  ...  Subscription required
Fax604-336-1490
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  • Fleet
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Overview

StagePreliminary Economic Assessment
Mine TypeUnderground
Commodities
  • Gold
  • Copper
Mining Method
  • Cut & Fill
  • Pilot-and-slash
Mine Life4.6 years (as of Jan 1, 2017)
The Lexington-Grenoble Mine, the Golden Crown Deposit, the Deadwood Deposit, the Phoenix and Boundary Falls Properties and the central Greenwood Mill and tailings facility along with their related property land tenure, mining equipment and permits are collectively referred to as the Greenwood Precious Metals Project.

Golden Dawn now maintains 24/7 security at the Greenwood mill and tailings facility as part of the care and maintenance for the site.


Owners

Source: p. 6
CompanyInterestOwnership
CanXGold Mining Corp. 100 % Indirect

Contractors

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Deposit Type

  • Vein / narrow vein
  • Epithermal
  • Porphyry


Summary:

There are a number of mineralizing styles and models in the Republic/Greenwood Districts:
1) Gold and Copper-Gold Skarns: Fe-Cu massive sulfide/oxide horizon in Brooklyn Fm. Present in all major “skarn” deposits in the district. Examples are Phoenix, Motherlode and Crown Jewel (“Buckhorn Mtn”).
2) Mesothermal Quartz Veins with Gold (+/- Ag, Pb, Zn). Examples are Providence Mine, Dentonia, Camp McKinney, May Mac. Polymetallic silver-lead-zinc veins with lesser gold.
3) Epithermal Quartz Veins commonly in the Republic District and often marked by the paleosurface between the Eocene Marron and Kettle River Formations and the overlying Oligocene Klondike. Examples are Mountain Formation Knob Hill Mine, Emanuel Creek, Union Mine and Picture Rock Quarry.
4) Cretaceous – Jurassic Alkalic Intrusives with Cu-Au-Ag (+/- PGE’s) with a strong spatial association between these intrusives and Jurassic thrust faults. Examples are Lexington-Lone Star alkalic porphyry type mineralization, Franklin Camp, Sappho cpy rich shears with PGE’s and Au, Golden Crown, Wildrose and Rossland type veins close spaced, parallel, en-echelon veins of gold in massive pyrrhotite-pyrite-chalcopyrite veins & quartz veins.
5) Gold Mineralization Associated with Serpentinite related to #3, #4 because an association with structure = an association with serpentinite. Known bodies of mineralization have traditionally been small, but often high grade. Examples are Athelstan – Jackpot - gold in ........


Mining Methods

  • Cut & Fill
  • Pilot-and-slash


Summary:

Lexington-Grenoble.
Access to the mine will be via the existing three surface portals, drifts and ramp.

The proposed mining method is jackleg/stoper pilot raise and slash. The overall mine sequence will generally be mined from the top down. A typical stope layout is shown in Figure 16-4 which will average 3 m thick and dip at +30 degrees. Initially a 2.4 m by 2.4 m pilot raise will be driven, in ore, from the lower sublevel transport drift to the upper sublevel overcut drift, at a central location along the stope strike. A three-drum slusher cut-out will be excavated at the base of the pilot raise in the operator accessway.

Open stope jackleg/stopper slashing will start at the base of the pilot raise, slashing outward along strike to the stope pillar locations on either side of the stope, and upward along the dip of the deposit body to the overcut drift. Drill steel will be 29 mm diameter and up to 2.4 m in length. The powder factor is estimated to be 0.50 kg per tonne. Open stope slashing will proceed outwards and upwards from the pilot raise. Access to the stope face will be via the sublevel overcut drift and pilot raise. A nipping slide and stope access ladders will be installed in the pilot raise. Blasted mineralization will be slushed down to the sublevel transport drift where it will be picked up by 2.5 and/or 3.5 cubic yard load/haul/dump/machines. These machines will not be able to access broken mineralization in the stope, from the lower s ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Projected Production:

CommodityUnitsLOM
Gold Equivalent koz 100
All production numbers are expressed as payable metal.

Operational Metrics:

Metrics
Daily milling capacity 424 t *
Ore tonnes mined, LOM 546,500 t *
Annual milling capacity 72,000 t *
* According to 2017 study.

Reserves at June 2, 2017:
The 3.5 g/t AuEq underground Mineral Resource cut-off grade for Lexington and Golden Crown.
The 0.4 g/t Au open pit Mineral Resource cut-off grade for Deadwood.

CategoryTonnage CommodityGradeContained Metal
Measured 58,000 t Gold 6.98 g/t
Measured 58,000 t Copper 1.1 %
Measured 58,000 t Gold Equivalent 8.63 g/t 16,100 oz
Indicated 477,000 t Gold Equivalent 142,700 oz
Measured & Indicated 535,000 t Gold Equivalent 158,800 oz
Inferred 928,000 t Gold Equivalent 33,900 oz

Commodity Production Costs:

CommodityUnitsAverage
Cash costs Gold Equivalent USD 604 / oz *  
All-in sustaining costs (AISC) Gold Equivalent USD 786 / oz *  
Assumed price Copper USD 2.35 / lb *  
Assumed price Gold USD 1,200 / oz *  
* According to 2017 study / presentation.

Operating Costs:

Units2017
Processing costs ($/t milled) CAD 31.4 *
G&A ($/t milled) CAD  ......  Subscription required
Total operating costs ($/t milled) CAD  ......  Subscription required
* According to 2017 study.
Subscription required - Subscription is required.

2017 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M CAD  ......  Subscription required
Sustaining CapEx $M CAD  ......  Subscription required
Total CapEx $M CAD  ......  Subscription required
Processing OpEx $M CAD 17.2
Transportation (haulage) costs $M CAD 1
G&A costs $M CAD 10.6
Total OpEx $M CAD  ......  Subscription required
Gross 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 @ 6% $M CAD  ......  Subscription required
After-tax NPV @ 0% $M CAD  ......  Subscription required
After-tax NPV @ 5% $M CAD  ......  Subscription required
After-tax NPV @ 10% $M CAD  ......  Subscription required
After-tax NPV @ 6% $M CAD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.


Heavy Mobile Equipment as of June 2, 2017:
HME TypeModelSizeQuantityStatus
Grader 250 HP ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed
Scoop Tram ....................... Subscription required 2.5 cu. yd ....................... Subscription required Existing
Scoop Tram ....................... Subscription required ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed
Truck (haul) ....................... Subscription required ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 11, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2017

Corporate Filings & Presentations:

DocumentYear
Management Discussion & Analysis 2022
Preliminary Economic Assessment 2017
Preliminary Economic Assessment 2016
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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