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Canada
Sleeping Giant Mine

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 Location:
63 km N from Amos, Quebec, Canada

  Regional Office:
475 de l’Église Avenue
Rouyn-Noranda (Evain)
Quebec, Canada
J0Z 1Y1
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Fax(819)-768-5475
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Shrinkage stoping
  • Longhole stoping
  • Room-and-pillar
Processing
  • Agitated tank (VAT) leaching
  • Carbon in pulp (CIP)
  • Carbon adsorption-desorption-recovery (ADR)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
Mine Life4 years (as of Jan 1, 2019)
Latest NewsAbcourt Has Received Explosive Permits for The Sleeping Giant Mine     October 16, 2020


Owners

Source: p. 33
CompanyInterestOwnership
Abcourt Mines Inc. 100 % Direct
On June 17, 2016, Abcourt completed the acquisition of the Sleeping Giant mine and mill.

Deposit Type

  • Vein / narrow vein


Summary:

The Sleeping Giant deposit is a member of the type of gold deposits formed by groups of veins with gold associated with sulphide minerals and whose geometry the stress field in the rocks at the time of vein formation (Birkett, 2008).

At the Sleeping Giant mine, gold mineralization is found in quartz-sulphide veins. The best mineralized veins typically contain four sulphide minerals: pyrite, pyrrhotite, chalcopyrite and sphalerite, which form 5 to 60% of the veins. The typical vein thickness is between 20 and 80 cm with average grade between 35 and 85 Au g/t (uncut channel sample analyses). In addition to gold, the veins contain silver and a small proportion of copper and zinc. The gold:silver ratio is about 1:2. Zones 20 and 30 have a lateral/vertical continuity of 300 m/670 m; that is to say, they have a much greater vertical continuity than lateral. In Zone 8, the lateral/vertical continuities are more than 600m/500 m.

Gold mineralization occurs in four cogenetic styles that are rich in base-metal sulphides: (1) narrow quartz veins, which are economically most important, (2) stratabound ore within sedimentary horizons, (3) quartz veining within QFP dikes, and (4) quartz veinlet arrays. Ore controls correspond to primary permeable features such as: (1) stratigraphic contacts, (2) specific lithological units, (3) synvolcanic faults and (4) preexisting joints. The geometry of the orebody displays an increasing complexity toward the south, i.e., toward the paleosurface (Gaboury, 1999).

Important veins seem associated with swarms of porphyry dykes. For example, zones 20, 30 and 8 are transversal structures to a series of sericitized quartz porphyry dykes. Gold vein emplacement occurred before the regional deformation and the stratigraphic orientation change in the west sector affects the ore zones’ orientations. Veins bend in connection with stratigraphy. ENE–ESE veins usually have a steep dip to the south even though NW–NE veins have a moderate dip to the east.

Ore veins occur mainly to the north, south and west of the main dacitic mass. The image is then an ore crescent on the west perimeter of the Sleeping Giant intrusive system. Veins in this crescent show a certain periodicity. Therefore, moving away from the intrusive centre, a recurring spacing between ore structures is shown. With regard to spatial distribution of this vein-type system, several veins occur at the level of the fold hinge line. Since veins were in place before the folding, it is considered this abundance shows that this hinge line is a site of favourable preservation, in contrast to the limb where veins might have been boudinaged. The hinge line then appears as a significant target where well-preserved ore veins can be found.

Vein mineralization, which is the only economic ore, is composed of 5 to 80% (mean of 25%) of sulphides (pyrite, pyrrhotite chalcopyrite, sphalerite and arsenopyrite). Quartz is the dominant gangue mineral, with lesser amounts of chlorite, sericite, tourmaline and metamorphic calcite and actinolite. Selvage alteration is weakly developed (chlorite-sericite) to absent (Gaboury, 1999).


Mining Methods

  • Shrinkage stoping
  • Longhole stoping
  • Room-and-pillar


Summary:

A mining plan has been prepared to extract 325,000 tonnes of reserves over a 4-year period including one year of pre-production (25,000 tonnes) followed by the three years with an annual production of 100,000 tonnes per year. The remaining 14,221 tonnes of reserves, not extracted by this mining plan, will be extracted later in subsequent operations following additional exploration and development work. There are good possibilities of extending the production period by doing additional exploration work on the indicated resources excluded from the mining plan and on the inferred resources and converting the latter into measured or indicated resources and eventually into reserves.

The mineralization is typically in narrow veins. The dip varies between 30o and 80o. The mining methods will be shrinkage and room and pillars. The long-hole method is not favored but will be used where the other methods are not adequate.


Crushing and Grinding


Processing

  • Agitated tank (VAT) leaching
  • Carbon in pulp (CIP)
  • Carbon adsorption-desorption-recovery (ADR)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Flow Sheet: Subscription required

Summary:

The process used in the mill to treat the gold ore is carbon in pulp. The mill capacity is 700 to 750 tonnes per day. This capacity is sufficient to treat the Elder and the Sleeping Giant ores.

Historically, the gold recovery in this mill has been 97,5%.

CommodityParameter
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Production:

CommodityUnitsLOM (Projected)
Gold oz 78,996


Reserves at July 31, 2019:

CategoryTonnage CommodityGradeContained Metal
Probable 339,221 t Gold 7.9 g/t 85,690 oz
Measured 10,900 t Gold 12.2 g/t 4,300 oz
Indicated 475,625 t Gold 11.2 g/t 171,275 oz
Measured & Indicated 486,500 t Gold 11.2 g/t 175,575 oz
Inferred 93,100 t Gold 11.85 g/t 35,400 oz


Heavy Mobile Equipment:

Mine Management:

Job TitleNamePhoneEmailProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 30, 2019
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Jun 1, 2020
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Management Discussion & Analysis 2017
Management Discussion & Analysis 2016
Annual Report 2015
Annual Report 2014
Annual Report 2013
Technical Report 2013
Annual Report 2012
Annual Report 2012
Technical Report 2009
Subscription required - Subscription is required.

News:

NewsDate
Abcourt Has Received Explosive Permits for The Sleeping Giant Mine October 16, 2020
Abcourt Mines Inc.: Corrections to the Information on the Resources at The Sleeping Giant Mine on the Press Releases October 5, 2020
Abcourt Mines Inc.: Update on the Preparation Work for the Opening of the Sleeping Giant Mine August 27, 2020
Abcourt's Directors have Approved a $1.6 M Exploration Program on the Sleeping Giant, Discovery and Flordin Gold Properties September 10, 2019
Positive Feasibility Study for Sleeping Giant Mine Modest Investment of Only $5m High Yeild Rate August 8, 2019
Modified 43-101 Report on the Sleeping Giant Resources May 13, 2019

Aerial view:

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