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Canada
Cochrane Hill Project (Atlantic Gold Operation)

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 Location:
13 km N from Sherbrooke, Nova Scotia, Canada

  Project Contacts:
409 Billybell Way
Middle Musquodoboit
Nova Scotia, Canada
B0N 1X0
Phone  ...  Subscription required
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StagePermitting
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Mine Life8 years (as of Jan 1, 2019)


Owners

Source: p. 101
CompanyInterestOwnership
St Barbara Ltd. 100 % Indirect
the Group, through its subsidiary Atlantic Mining Nova Scotia, acquired the remaining 93% of the issued shares of Moose River Resources Incorporated (“MRRI”) resulting in 100% St Barbara ownership.

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Vein / narrow vein


Summary:

Individual mining operations, including mining at Cochrane Hill, have focussed on quartz-vein hosted gold deposits within the Goldenville Formation, typically associated with the limbs and hinges of anticlines. This setting is often referred to as ‘Meguma style’ gold mineralization and a number of workers have drawn parallels with a similar style of gold mineralization in the Victorian Goldfields of eastern Australia (e.g. Christie et al, 1999) .

At Cochrane Hill, the highest gold grades are typically associated with bedding-parallel tabular quartz veins. However, the host rock material between quartz veins also carrie s significant gold grades. It is the quartz vein hosted gold mineralization augmented by dissem inated style mineralization that forms the basis of a geological model associated with the ongoing exploration and development of the Cochrane Hill Deposit.

Gold mineralisation within the Cochrane Hill Property has been recognised over a strike length of approximately 3.8km, along a single trend, several hundred metres south of the a nticlinal axis.

The Cochrane Hill Deposit is near the eastern end of this trend. It occurs as a tabular zone of parallel, planar quartz veins in a well bedded argillite and greywacke protolith, dipping steeply to the north at approximately 70°, parallel to bedding in the southern limb of the overturned Cochrane Hill Anticline. Gold mineralisation occurs over true widths of up to 60m to 70m, within which ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Mining is based on conventional open pit methods suited for the project location and local site requirements. The mining fleet will include diesel powered down the hole (DTH) drills with 144 mm bit size for production drilling, diesel-powered RC drills for bench-scale grade control drilling, 5 m3 bucket size diesel hydraulic excavators and 7 m3 bucket sized wheel loaders for production loading, and 64 t payload rigid-frame haul trucks and 41 t articulated trucks for production hauling, plus ancillary and service equipment to support the mining operations. In-pit dewatering systems will be established for each pit. All surface water and precipitation in the pits will be handled by submersible pumps.

Two independent stand-alone open pit operations at Fifteen Mile Stream and Cochrane Hill will run concurrently with the Touquoy and Beaver Dam operations.

At Cochrane Hill, ore will be hauled to a crusher to be situated 1,200 m east of the pit, which will feed the process plant. Waste rock will be split into PAG and NPAG material and will be deposited into a WRSFs to be located 700 m north of the pit or will be used as rock fill in construction of the TMF that will be situated 1,300 m southeast of the pit.

The Cochrane Hill pit is split into south and north phases with the higher-grade south phase mined ahead of the north phase. A starter phase is also designed to provide waste rock construction materials to the starter tailings dam.


Crushing and Grinding
Source: Subscription required

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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Combined production numbers are reported under Atlantic Gold Operation

Operational Metrics:

Metrics
Stripping / waste ratio 3.5 *
Waste tonnes, LOM 53,397 kt *
Ore tonnes mined, LOM 15,380 kt *
Total tonnes mined, LOM 68,777 kt *
Tonnes milled, LOM 15,380 kt *
* According to 2019 study.

Reserves at February 15, 2019:

CategoryTonnage CommodityGradeContained Metal
Proven 10.25 Mt Gold 1.08 g/t
Probable 5.13 Mt Gold 0.96 g/t
Measured 10.78 Mt Gold 1.12 g/t 387.3 koz
Indicated 6.67 Mt Gold 1.02 g/t 219.2 koz
Measured & Indicated 17.45 Mt Gold 1.08 g/t 606.5 koz
Inferred 1.82 Mt Gold 1.24 g/t 72.7 koz

Commodity Production Costs:

CommodityUnitsAverage
Assumed price Gold USD  ......  Subscription required&nbs
* According to 2019 study / presentation.

Operating Costs:

Units2019
OP mining costs ($/t milled) CAD 11.8 *
Processing costs ($/t milled) CAD  ......  Subscription required
Total operating costs ($/t milled) CAD  ......  Subscription required
* According to 2019 study.
Subscription required - Subscription is required.

2019 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M CAD  ......  Subscription required
Sustaining CapEx $M CAD  ......  Subscription required
Subscription required - Subscription is required.


Proposed Heavy Mobile Equipment as of May 19, 2019:
HME TypeSizeQuantityLeased or
Contractor
Bulldozer 325 kW ....................... Subscription required Leased
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Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Mar 25, 2019
....................... Subscription required ....................... Subscription required Subscription required Mar 25, 2019
....................... Subscription required ....................... Subscription required Subscription required Nov 16, 2022
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
Press Release 2018
Technical Report 2017
Preliminary Economic Assessment 2014
Technical Report 2014
Subscription required - Subscription is required.

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