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Canada
Murray Brook Project

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 Location:
58 km W from Bathurst, New Brunswick, Canada

  Project Contacts:
4 King Street West, Suite 1330
Toronto
Ontario, Canada
M5H 1B6
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
  • Zinc
  • Lead
  • Copper
  • Silver
  • Gold
Mining Method
  • Truck & Shovel / Loader
Processing
  • Flotation
Mine Life10 years (as of Jan 1, 2013)
Latest NewsPuma Exploration and El Nino Ventures Terminate the Murray Brook Purchase Agreement     August 4, 2020


Owners

Source: p. 2
CompanyInterestOwnership
El Nino Ventures Inc. 32.1 % Direct
Votorantim Metals Canada Inc. 67.8 % Direct
El Nino (33%) partnered with Votorantim Metais (67%) in exploration and development of Murray Brook.

Votorantim Metals Canada Inc. operates as a subsidiary of Votorantim Metais S.A.

Deposit Type

  • VMS


Summary:

The Murray Brook sulphide mineralization is classified as a volcanogenic massive sulphide deposit (P., W., C., Shanks III, et al) 2009. This type of deposit is characterized by massive to semi-massive iron sulphide minerals including variable amounts of base metals and precious metals. This type of deposit is well studied and documented. Genetically the deposits are coeval with felsic volcanic centres, and are generally lens-like, parallel to the stratigraphy, with a discordant hydrothermal “pipe” at the stratigraphic base of the sulphide accumulation.

As is well illustrated by the discovery of the Murray Brook deposit, heavy mineral and soil geochemical surveys are an effective search tools. Geophysical surveys including magnetic, electromagnetic, induced polarization/ resistivity, and gravity surveys are also effective exploration tools for concealed deposits.

The Murray Brook deposit is hosted by sedimentary rocks of the Charlotte Brook Member in the lower part of the Mount Brittain Formation. The upper felsic volcanic member of the Mount Brittain Formation is host to the Restigouche deposit, some 10 km to the west. The Mount Brittain Formation is believed to be equivalent of the Spruce Lake Formation which hosts the Caribou Mine, ten kilometres to the east.

The sulphides are massive to semi-massive, locally banded and pyrite-rich. The deposit has a 1 to 3 m wide halo composed of chloritized sedimentary rocks containing disseminated pyrite. The hanging wall is moderately chloritic and is locally intensely deformed. The footwall consists of fine grained felsic tuff, and tuffaceous sediments with moderate to strong chlorite and sericite alteration.

Sulphides are mainly fine grained, massive, vaguely laminated pyrite with disseminated and banded sphalerite, chalcopyrite and galena, with minor tetrahedrite, covellite, marcasite and arsenopyrite.


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Murray Brook deposit is relatively shallow in depth and lends itself to conventional open pit mining methods. A single open pit will be developed that will have a maximum depth of approximately 340 m from the highest point (550 masl) to lowest point (212 masl).

The mine production schedule consists of one pre production year for pre-stripping and then ten years of actual mine production.

The target milling rate is approximately 2,000,000 tonnes per year, or approximately 6,000 t/day. Daily mining rates of mineralized material and waste combined will range from 12,000 t/d to 32,000 t/d and average about 27,000 t/day.


Crushing and Grinding


Processing

  • Flotation

Source: Subscription required

Summary:

Run-of-mine mill feed is dumped directly to a primary crusher equipped with a rock breaker. Crushed material discharges to a surge pocket and is delivered via an apron feeder and conveyors to a stockpile.

Feed to the semi-autogenous grinding mill (SAG mill) is withdrawn from under the stockpile by belt feeders and conveyed to the mill at a rate controlled by a weightometer located on the mill feed belt.

The grinding circuit consists of a SAG mill followed by a ball mill operating in closed circuit with hydrocyclone classifiers to produce a ground product at approximately 80% passing 30 microns for flotation.

Cyclone overflow slurry from the grinding circuit is fed via a conditioning tank to rougher/scavenger flotation cells comprised of sequential copper, lead, and zinc circuits. Rougher concentrates are reground and cleaned in three stages to produce saleable copper, lead and zinc concentrates. Cleaner scavenger tailings from all circuits are directed ........

Recoveries & Grades:

CommodityParameterAvg. LOM
Zinc Recovery Rate, % 88.8
Zinc Head Grade, % 2.46
Zinc Concentrate Grade, % 53.8
Lead Recovery Rate, % 36.6
Lead Head Grade, % 0.89
Lead Concentrate Grade, % 50.3
Copper Recovery Rate, % 51.4
Copper Head Grade, % 0.43
Copper Concentrate Grade, % 17.5
Silver Head Grade, g/t 37.7

Projected Production:

CommodityProductUnitsAvg. AnnualLOM
Zinc Metal in concentrate M lbs 91914
Zinc Concentrate kt 770
Lead Metal in concentrate M lbs  ......  Subscription required  ......  Subscription required
Lead Concentrate kt  ......  Subscription required
Copper Metal in concentrate M lbs  ......  Subscription required  ......  Subscription required
Copper Concentrate kt  ......  Subscription required
Silver Metal in concentrate M oz  ......  Subscription required  ......  Subscription required

Operational Metrics:

Metrics
Daily milling rate 6,000 t *
Stripping / waste ratio 4.3 *
Daily mining rate 27,000 t *
Waste tonnes, LOM 81,885,152 t *
Ore tonnes mined, LOM 18,947,674 t *
Total tonnes mined, LOM 100,832,826 t *
Tonnes milled, LOM 18,947,600 t *
Annual milling capacity 2,000,000 t of ore *
* According to 2013 study.

Reserves at June 4, 2013:

CategoryTonnage CommodityGrade
Measured 12,075,000 t Zinc 2.75 %
Measured 12,075,000 t Lead 0.96 %
Measured 12,075,000 t Copper 0.37 %
Measured 12,075,000 t Silver 38.8 g/t
Measured 12,075,000 t Gold 0.47 g/t
Indicated 6,635,000 t Zinc 1.98 %
Indicated 6,635,000 t Lead 0.78 %
Indicated 6,635,000 t Copper 0.5 %
Indicated 6,635,000 t Silver 36.1 g/t
Indicated 6,635,000 t Gold 0.66 g/t
Measured & Indicated 18,710,000 t Zinc 2.48 %
Measured & Indicated 18,710,000 t Lead 0.9 %
Measured & Indicated 18,710,000 t Copper 0.42 %
Measured & Indicated 18,710,000 t Silver 37.9 g/t
Measured & Indicated 18,710,000 t Gold 0.53 g/t
Inferred 240,000 t Zinc 1.18 %
Inferred 240,000 t Lead 0.41 %
Inferred 240,000 t Copper 1.46 %
Inferred 240,000 t Silver 24.7 g/t
Inferred 240,000 t Gold 0.39 g/t

2013 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 270
G&A costs $M CAD 25
Total OpEx $M CAD  ......  Subscription required
Income Taxes $M CAD  ......  Subscription required
Total Taxes $M CAD  ......  Subscription required
Royalty payments $M CAD  ......  Subscription required
Net revenue (LOM) $M CAD  ......  Subscription required
Operating margin (LOM) $M CAD  ......  Subscription required
EBITDA (LOM) $M CAD  ......  Subscription required
Net Income (LOM) $M CAD  ......  Subscription required
After-tax Cash Flow (LOM) $M CAD  ......  Subscription required
After-tax NPV @ 0% $M CAD  ......  Subscription required
After-tax NPV @ 5% $M CAD  ......  Subscription required
After-tax NPV @ 7% $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 June 4, 2013:
HME TypeModelSizeQuantity
ANFO Loader 12 t ....................... Subscription required
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Corporate Filings & Presentations:

DocumentYear
Press Release 2014
Preliminary Economic Assessment 2013
Technical Report 2011
Subscription required - Subscription is required.

News:

NewsDate
Puma Exploration and El Nino Ventures Terminate the Murray Brook Purchase Agreement August 4, 2020
Puma Exploration and El Nino Ventures Agree to 30-day Extension for the Murray Brook Purchase Agreement June 30, 2020

Subscription required - Subscription is required.

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