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Canada
Garrcon (Garrison) Project

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 Location:
103 km E from Timmins, Ontario, Canada

  Project Contacts:
155 University Avenue 1440
Toronto
Ontario, Canada
M5H 3B7
Phone  ...  Subscription required
Fax(416) 363 9813
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StagePreliminary Economic Assessment
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Processing
  • Gravity separation
  • Heap leach
  • Concentrate leach
  • Carbon in leach (CIL)
  • Carbon in pulp (CIP)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
Mine Life8 years (as of Jan 1, 2013)
Latest NewsO3 Mining Announces Sale Of Garrison Project and Partnership with Moneta Porcupine to Develop Timmins Gold Camp     January 14, 2021


Owners

 
CompanyInterestOwnership
Northern Gold Mining Inc. 100 % Direct
O3 Mining Inc. 100 % Indirect

Deposit Type

  • Breccia pipe / Stockwork


Summary:

The Garrcon Deposit on the Garrison Property is a low grade bulk tonnage gold deposit which includes the higher grade historic Shaft, South and North Zones and recently defined Green and East Zones. It occurs within the Timiskaming Assemblage adjacent to the Porcupine-Destor fault and is a zone of brecciated, silicified, sandstone with gold associated with disseminated sulphides (predominantly pyrite) and irregular quartz veinlets.

The Garrcon Deposit located at UTM 5,374,000N and 579,000E on the Property comprises a broad zone of low grade enveloping gold mineralisation that includes the higher grade historic Shaft, South and North Zones as well as the Green and East Zones identified by the Company’s drill programs. It occurs within the Timiskaming Assemblage adjacent to the Porcupine-Destor fault and is a zone of brecciated, silicified metasediment with stockwork quartz-carbonate veins and veinlets and minor disseminated sulphides cut by narrow variably altered lamprophyre and syenite dikes.

Gold mineralisation in the Garrcon North and Garrcon Shaft/South zones is hosted by Timiskaming-age metasedimentary rock sequences that include greywacke, arkose and iron formation cut by narrow lamprophyre and syenite dikes, occurring adjacent to the Destor-Porcupine Fault Zone. These metasedimentary sequences have been hydrothermally altered and mineralized in distinct zones persisting to depths greater than 650 meters vertically. The intrusive dikes are variably altered. Gold occurs in a complex system of stockwork veins hosted in a zone of brecciated and silicified metasediments. The veins are composed predominately of quartz-carbonate (calcite, dolomite, and ankerite) with and without albite. The stockwork veins are normally less than one centimeter in width with many being only a half centimeter wide or less. Gold occurs primarily as native gold within the stockwork veins with minor dissemination into the vein walls. Higher grade intersections (above 10 g/t) are frequently intersected in intervals where pyrite makes up much less than 1% of the total rock. Principal minerals are native gold, pyrite, magnetite, specularite, and pyrrhotite with subordinate chalcopyrite, sphalerite, galena and arsenopyrite. Pervasive wall rock alteration is common adjacent to the veins, usually consisting of carbonatisation (ankerite or ferroan dolomite) and minor sulphides (pyrite and pyrrhotite).


Mining Methods

  • Truck & Shovel / Loader


Summary:

Mining will be by open pit with a stripping ratio of about 2:1. Shovels will be used to load 100 ton haul trucks. Ore will be designated, and the remaining material sent to the waste dumps. If the waste material contains sufficient gold to justify recovery by heap leach, it would be sent to a primary crusher and from there either to the processing plant or a heap leach facility.


Crushing and Grinding


Processing

  • Gravity separation
  • Heap leach
  • Concentrate leach
  • Carbon in leach (CIL)
  • Carbon in pulp (CIP)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Source: Subscription required

Summary:

A conventional gravity-agitated cyanide leach plant capable of treating 11,300 tonne per day plant is planned for higher grade ore, + 0.3 g/tonne, (average 0.9 g/tonne) and a seasonal heap leach facility is planned for the lower grade material with grades between 0.15 g/tonne and 0.3 g/tonne. The processing plant will operate 365 days per year and the heap leach facility will operate about 274 days per year (9 month operating season), treating 8,000 tonnes. per day or about 2.3 million tonnes per year.

In this circuit, it is assumed that sulphide separation requires a finer grind than 2000 micrometers and that essentially half of the crusher product will be ground. It also assumes that the sulphide separation is performed at a size of approximately 75 micrometers. A gravity separation circuit is included, as spirals, however, this may have to be replaced by a flotation circuit. In addition, no waste stream is produced at this point. The sulphide stream is assumed to represen ........


Projected Production:

CommodityUnitsAvg. AnnualLOM
Gold oz 126,5231,012,180

Operational Metrics:

Metrics
Daily milling rate 19,300 t of ore *
Stripping / waste ratio 2 *
Daily mining capacity 52,400 t *
Annual mining capacity 4.12 Mt of ore *
Waste tonnes, LOM 101.8 Mt *
Ore tonnes mined, LOM 51.3 Mt *
Total tonnes mined, LOM 153.1 Mt *
Plant annual capacity 4.1 Mt *
* According to 2013 study.

Reserves at February 19, 2019:

CategoryOreTypeTonnage CommodityGradeContained Metal
Measured & Indicated In-Situ (UG) 228 kt Gold 3.95 g/t 29 koz
Measured & Indicated In-Situ (OP) 43,382 kt Gold 1.1 g/t 1,541 koz
Inferred In-Situ (UG) 1,075 kt Gold 3.98 g/t 138 koz
Inferred In-Situ (OP) 9,190 kt Gold 0.96 g/t 283 koz

Commodity Production Costs:

CommodityUnitsAverage
Total cash costs Gold CAD 648 / oz *
Assumed price Gold USD 1,200 / oz *
* According to 2013 study / presentation.

2013 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Closure costs $M CAD  ......  Subscription required
Total CapEx $M CAD  ......  Subscription required
OP OpEx $M CAD  ......  Subscription required
Processing OpEx $M CAD 205.5
G&A costs $M CAD 8.2
Total OpEx $M CAD  ......  Subscription required
Total Taxes $M CAD  ......  Subscription required
Gross revenue (LOM) $M CAD  ......  Subscription required
Net Income (LOM) $M CAD  ......  Subscription required
After-tax Cash Flow (LOM) $M CAD  ......  Subscription required
After-tax NPV @ 5% $M CAD  ......  Subscription required
After-tax NPV @ 10% $M CAD  ......  Subscription required
After-tax NPV @ 8% $M CAD  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.

Proposed Heavy Mobile Equipment as of December 30, 2013:
HME TypeSizeQuantity
Backhoe 45 t 1
....................... Subscription required ....................... Subscription required 3
....................... Subscription required 4
....................... Subscription required ....................... Subscription required 1
....................... Subscription required ....................... Subscription required 2
....................... Subscription required ....................... Subscription required 2
....................... Subscription required ....................... Subscription required 13
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 9, 2019
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
Preliminary Economic Assessment 2014
Technical Report 2013
Subscription required - Subscription is required.

News:

NewsDate
O3 Mining Announces Sale Of Garrison Project and Partnership with Moneta Porcupine to Develop Timmins Gold Camp January 14, 2021
O3 Mining Delivers Positive PEA for Garrison Project December 14, 2020
Osisko Releases Mineral Resource Estimate for Garrison Gold Deposit February 19, 2019
Transition Metals Subsidiary Closes Transaction with Osisko Mining November 24, 2017

Aerial view:

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