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Canada
Scott Lake Project

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 Location:
20 km W from Chibougamau, Quebec, Canada

  Project Contacts:
110 Place Crémazie West, Suite 430
Montreal
Quebec, Canada
H2P 1B9
Phone  ...  Subscription required
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Filings & News

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Overview

StagePreliminary Economic Assessment
Mine TypeUnderground
Commodities
  • Copper
  • Zinc
  • Silver
  • Gold
Mining Method
  • Longitudinal stoping
Processing
  • Flotation
Mine Life15 years (as of Jan 1, 2017)
Latest NewsYorbeau Resources Inc. Files Technical Report on Preliminary Economic Assessment of Scott Lake Deposit     December 19, 2017


Owners

Source:
CompanyInterestOwnership
Yorbeau Resources Inc. 100 % Direct
The property is 100% owned by Yorbeau, although parts of it are subject to certain cash payments upon reaching commercial production. It covers about 18 kilometres of the same favourable felsic rocks (Waconichi Formation) that hosts the past-producing high grade Lemoine mine located about 40 kilometres to the southeast (now part of Yorbeau's Lemoine Property).

Deposit Type

  • VMS


Summary:

The Project consists of a number of mineralized zones that have all the characteristics of volcanogenic massive sulphide (VMS) mineralization. VMS-style mineralization at Scott Lake comprises distinct stratabound massive sulphide lenses located mainly along or close to rhyolite-andesite/basalt contacts. In addition to the massive sulphides, separate zones of VMS style disseminated and stringer sulphides, which may or may not be connected with massive sulphide lenses, have been found over a strike length of at least two kilometres.

The Property is located on the north limb of the Chibougamau Anticline. From south to north, the Property stratigraphy consists of a monoclinal sequence extending from the upper units of the Lake Doré Complex and the Chibougamau Pluton to basalts of the Gilman Formation, with remnants of felsic rocks of the Waconichi Formation caught in between. All units are metamorphosed to the greenschist facies. The Property consists of a number of mineralized zones that have all the features of VMS mineralization. VMS style mineralization at Scott Lake comprises distinct stratabound massive sulphide zones located mainly along or close to rhyolite-andesite/basalt contacts and adjacent stringer sulphide zones within altered rhyolite units.

At Scott Lake, the Waconichi Formation is represented at surface by a 600 m thick dome of quartz-phyric rhyolite that pinches out quickly to the west and seems to disappear more gradually to the east. This original complex flow distribution may have been partly enhanced by
later deformation and the intrusion of the Chibougamau Pluton, however, there is no evidence of strong deformation anywhere on the Property, such as regional foliation or fold axes. An important feature of the property geology is that
there is significantly more rhyolite at depth than indicated by the surface geology. In fact, while rhyolite at surface completely pinches out around section 200W, it can be traced by drilling to the west for at least an additional 1.8 km at depths ranging from 100 m to at least 700 m.

This unit has a highly variable thickness ranging up to 250 m and is characterized chemically by silica in the range of low 60% and titanium content in the range of 0.7% TiO2 to 0.8% TiO2. Except for this dacite unit, the Gilman Formation consists essentially of pillowed to massive basalts and andesites cut by numerous (synvolcanic?) mafic sills. Thin rhyolitic units (local domes?) and sulphiderich cherty horizons have also been cut by drilling within the lower 200 m to 300 m of the Gilman Formation.


Mining Methods

  • Longitudinal stoping


Summary:

The preproduction mine development is carried out by a mining contractor and turned over to the mine crews in year one. Contractor rates were used for the preproduction period while manpower estimates were made for the owner operators commencing in year one of the mine production. Although a shaft scenario was considered, an all ramp system was selected as the most appropriate and the mineralized zones are therefore accessed via a ramp system. The Scott Project will take approximately two to three years of initial development to prepare the mine for production. Mining during the LOM will include 50% mineralized material from Longitudinal LH stopes, 26% from Transverse LH stopes, 11% from Cut and Fill stopes, and 13% from development. The Stringer type mineralization will be mined using the Longitudinal stoping method and thus represents a large portion of the production profile.


Crushing and Grinding


Processing

  • Flotation

Source: Subscription required

Summary:

A concentrator would have to be built on site and the mill production mirrors the mine production. The mill feed would produce copper and zinc concentrates assumed to be commercially viable.

The work done includes a mineralogical characterization (QEMSCAN), a Davis Tube magnetic test, an oxidation and activation test, 11 batch flotation tests, and a “locked cycle” flotation test. The batch flotation tests were done to determine the response of the mineralization to various grinds and flotation parameters, and to determine the process and flowsheet to be used for the locked cycle test. The locked cycle test was designed to replicate at bench scale, as much as possible, the physical and chemical conditions that would ultimately be used at industrial scale in a concentrator.

Recoveries & Grades:

CommodityParameterAvg. LOM
Copper Recovery Rate, %  ......  Subscription required
Copper Head Grade, % 0.81
Zinc Recovery Rate, %  ......  Subscription required
Zinc Head Grade, % 4.14
Silver Recovery Rate, %  ......  Subscription required
Silver Head Grade, g/t 26.6
Subscription required - Subscription is required.

Projected Production:

CommodityProductUnitsLOM
Copper Metal in concentrate M lbs 15
Copper Concentrate t 28,467
Zinc Metal in concentrate M lbs  ......  Subscription required
Zinc Concentrate t  ......  Subscription required
Silver Metal in concentrate oz  ......  Subscription required

Operational Metrics:

Metrics
Ore tonnes mined, LOM  ......  Subscription required
Annual processing capacity  ......  Subscription required
* According to 2017 study.

Reserves at December 31, 2017:

CategoryTonnage CommodityGrade
Indicated 3.57 Mt Copper 0.95 %
Indicated 3.57 Mt Zinc 4.17 %
Indicated 3.57 Mt Silver 37.2 g/t
Indicated 3.57 Mt Gold 0.22 g/t
Inferred 14.28 Mt Copper 0.78 %
Inferred 14.28 Mt Zinc 3.49 %
Inferred 14.28 Mt Silver 22.3 g/t
Inferred 14.28 Mt Gold 0.22 g/t

Commodity Production Costs:

CommodityUnitsAverage
Assumed price Zinc USD 1.3 / lb *
Assumed price Copper USD 3.5 / lb *
Assumed price Silver USD 23 / oz *
Assumed price Gold USD 1,500 / oz *
* According to 2017 study / presentation.

Operating Costs:

Units2017
UG mining costs ($/t mined) USD 54.1 *
Processing costs ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2017 study.
Subscription required - Subscription is required.

2017 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
UG OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 60
Pre-tax Cash Flow (LOM) $M USD  ......  Subscription required
Pre-tax NPV @ 8% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
Pre-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.

Heavy Mobile Equipment:

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Corporate Filings & Presentations:

DocumentYear
Press Release 2017
Technical Report 2017
Subscription required - Subscription is required.

News:

NewsDate
Yorbeau Resources Inc. Files Technical Report on Preliminary Economic Assessment of Scott Lake Deposit December 19, 2017
Yorbeau Resources Announces PEA Results for Scott Zinc-Copper Project November 20, 2017

Aerial view:

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