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Canada
Woodstock Project

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 Location:
14 km NE from Houlton, New Brunswick, Canada

  Project Contacts:
Suite 1805 55 University Avenue
Toronto
Ontario, Canada
M5J 2H7
Phone  ...  Subscription required
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Filings & News

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Overview

StagePreliminary Economic Assessment
Mine TypeOpen Pit
Commodities
  • Manganese
  • Iron Ore
Mining Method
  • Truck & Shovel / Loader
Processing
  • Calcining
  • Acid tank leaching
  • Magnetic separation
  • Solvent Extraction & Electrowinning
Mine Life40 years (as of Jan 1, 2014)


Owners

Source: p. 7
CompanyInterestOwnership
Canadian Manganese Company Inc. 100 % Direct
Buchans Resources Ltd. 100 % Indirect
Buchans, through its wholly owned subsidiary Canadian Manganese Corporation, holds the Woodstock Property in New Brunswick, containing the Plymouth Mn-Fe deposit.

Deposit Type

  • Sedimentary
  • Banded iron formation


Summary:

The manganese contained in the Plymouth deposit is predominantly in the form of a carbonate (rhodochrosite) whilst the iron exists in both oxide (hematite, magnetite and ilmenite) and carbonate minerals (predominantly siderite). The deposit type is sedimentary in origin and of the stratiform, BIF type. The host sequence consists of Silurian red and grey siliciclastic to calcareous siltstones and shales that have been metamorphosed under lower greenschist facies conditions. In addition to the main oxide, silicate and carbonate facies iron-manganese concentrations, host rocks contain minor magnetite and traces of pyrite in grey siltstone and black shale intervals. The manganese rich iron formation deposits occur in stratiform bodies and represent spatially distinct intervals that accumulated contemporaneously with surrounding sedimentary strata.

Iron and manganese are considered to have been deposited from seawater in an oxidizing environment and host strata have subsequently been structurally thickened through folding and faulting related to the Acadian Orogeny (middle to early Late Devonian in age). Some subsequent remobilization of manganese has occurred and resulted in re-deposition of manganese carbonate and oxides in fracture zones. Additional surficial weathering has also resulted in very limited oxidation at the overburden-bedrock interface, but is typically estimated to be limited to centimetres depth into bedrock.

Historical interpretation of the mineralization of the Plymouth deposit indicated that the iron manganese mineralization can be subdivided into iron-manganese oxide, silicatecarbonate-oxide, and carbonate facies (Sidwell 1957; Gilders 1976; Roberts and Prince 1990). These stratiform deposits are analogous to the Type IIA deposits of bedded manganese oxides and carbonates described by Macharmer (1987). The ironmanganese oxide facies present on the Property is represented by red to maroon siltstone and red chert and is characterized by the mineral assemblage magnetite, hematite, braunite (Mn+2Mn+36[O8SiO4]) and bixbyite ([Mn,Fe]2O3) and ranges between 30% and 80% iron-manganese oxides. Iron and manganese mineralization is also present in the form of rhodochrosite (MnCO3) and minor sursassite (Mn2Al3[(SiO4)(Si2O7)(OH)3]) crosscuts syngenetic iron-manganese mineralization in the Deposit (Sidwell 1957). Layers of iron-manganese mineralization are also locally observed to be crosscut by veins of quartz, quartz-carbonate, chlorite, and sulphide (Way et al. 2009).


Mining Methods

  • Truck & Shovel / Loader


Summary:

The mining operation will use a conventional open pit mining method, off-highway haul trucks, and hydraulic excavator. The waste rock and mineral resource will be drilled and blasted using typical grade control methods and blasthole sampling.

Tetra Tech used an overall pit slope angle of 45°, as the required geotechnical data was not available to support the analysis required to assess the pit slope angles. Tetra Tech based this pit slope angle on estimates from previous projects and believes that this value is reasonable.


Crushing and Grinding


Processing

  • Calcining
  • Acid tank leaching
  • Magnetic separation
  • Solvent Extraction & Electrowinning

Source: Subscription required

Summary:

A conventional two-stage crushing plant is used to reduce the size of the ROM mill feed to the required size for grinding. After primary size reduction by the jaw crusher, the crushed material is conveyed to a screen where the oversize material is fed to a secondary cone crusher for final crushing. Final crushed material is stored in a fine ore storage silo.

The grinding circuit also utilizes a conventional two-stage, rod mill-ball mill configuration with the rod mill operating in open circuit and the ball mill operating in closed circuit. Size classification in the grinding circuit is by hydrocyclones. The target grind size of 80% passing 20 µm is based on achieving a similar particle size distribution in the feed to the pre-concentration circuit to that which was used in the preliminary magnetic separation test work.

The ground material will be fed as slurry through a dual-stage wet drum LIMS to remove ferromagnetic iron prior to entering the HGMS circuit. Bas ........

Recoveries & Grades:

CommodityParameterAvg. LOM
Manganese Recovery Rate, %  ......  Subscription required
Manganese Head Grade, % 9.92
Iron Ore Concentrate Grade, %  ......  Subscription required
Subscription required - Subscription is required.

Projected Production:

CommodityProductUnitsAvg. Annual
Manganese Electrolytic metal t 80,104
Iron Ore Concentrate t  ......  Subscription required

Operational Metrics:

Metrics
Daily milling rate 3,000 t *
Waste tonnes, LOM 51.6 Mt *
Ore tonnes mined, LOM 41.4 Mt *
Total tonnes mined, LOM 97 Mt *
* According to 2014 study.

Reserves at July 10, 2014:

CategoryTonnage CommodityGradeContained Metal
Inferred 44,770,000 t Manganese 9.85 % 9.72 B lbs
Inferred 44,770,000 t Iron 14.15 %

Commodity Production Costs:

CommodityUnitsAverage
Cash costs Manganese CAD 0.75 / lb *
Assumed price Manganese CAD 1.53 / lb *
Assumed price Iron Ore CAD 153.68 / t *
* According to 2014 study / presentation.

Operating Costs:

Units2014
OP mining costs ($/t milled) CAD 6.45 *
Processing costs ($/t milled) CAD  ......  Subscription required
Total operating costs ($/t milled) CAD  ......  Subscription required
* According to 2014 study.
Subscription required - Subscription is required.

2014 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M CAD  ......  Subscription required
Sustaining CapEx $M CAD  ......  Subscription required
Closure costs $M CAD  ......  Subscription required
Total CapEx $M CAD  ......  Subscription required
OP OpEx $M CAD  ......  Subscription required
Processing OpEx $M CAD 4,820
G&A costs $M CAD 123.9
Total OpEx $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 @ 8% $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 July 10, 2014:
HME TypeModelSizeQuantity
ANFO Loader 180 HP 1
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Subscription required - Subscription is required.

Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2018
Preliminary Economic Assessment 2014
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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