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Canada
Lapa Mine

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 Location:
16 km NW from Malatric, Quebec, Canada

  Address:
299, Boulevard St-Paul N. Route 117
Québec
Quebec, Canada
J0Y 2H0
Phone  ...  Subscription required
Fax+1-819-874-0617
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StatusClosing / Closed
Mine TypeUnderground
Commodities
  • Gold
  • Silver
Mining Method
  • Transverse open stoping
  • Longitudinal retreat
  • Cemented backfill
Processing
  • Gravity separation
  • Concentrate leach
  • Carbon in leach (CIL)
  • Cyanide (reagent)
Mine Life2018
Mining operations at Lapa continued through year-end 2017 with ore being stockpiled for processing in 2018. Once production from Lapa mine is completed later in 2018, official reclamation and restoration work will begin, with full closure anticipated in 2026–2027.


Owners

 
CompanyInterestOwnership
Agnico Eagle Mines Ltd. 100 % Direct

Deposit Type

  • Vein / narrow vein


Summary:

The Lapa property is located near the southern boundary of the Archean-age (2.7 billion years old) Abitibi Subprovince and the Pontiac Subprovince within the Superior Province of the Canadian Shield. The most important regional structure is the Cadillac-Larder Lake (CLL) fault zone marking the contact between the Abitibi and Pontiac Subprovinces. The fault zone passes through the property from west to east, and is marked by schists and mafic to ultramafic volcanic flows that comprise the Piché group (up to approximately 300 metres thick in the mine area). On the Lapa property, the fault zone displays a "Z" shaped fold to which all of the lithologic groups in the region conform. Feldspathic dykes cut the Piché group, especially near the fold. North of the Piché group lies the Cadillac sedimentary group, which consists of 500 metres or more of well-banded wacke, conglomerate and siltstone with intercalations of iron formation. The Pontiac group sedimentary rocks (up to approximately 300 metres thick) that occur to the south of the Piché group are similar to the Cadillac group but do not contain conglomerate nor iron formation.

All of the known gold mineralization along the CLL fault zone is epigenetic (late) vein type, controlled by the structure. The mineralization is associated with the fault zone and occurs within or immediately adjacent to the Piché group rocks.

The Lapa deposit is comprised of the Contact Zone and five satellite zones. The Contact Zone accounts for approximately 60% of the mineral reserves.

The ore zones are made up of multiple quartz veins and veinlets, often smoky and anastomosing, within a sheared and altered envelope containing minor sulphides and visible gold. The Contact Zone is generally located at the contact between the Piché group and the Cadillac group. The satellite zones are located within the Piché group at a distance varying from ten to 50 metres from the contact with the Cadillac group, except for the satellite zones 7 and 8 at 150 metres from this same contact, and the Contact North Zone, which is located approximately ten metres north of the Contact Zone within the Cadillac group. The sheared envelope consists of millimetre-thick foliation bands of biotite or sericite with silica and, in places, cuts across rock units. Quartz veins and millimetre-sized veinlets parallel to the foliation account for 5% to 25% of the mineralization. Visible gold is common in the veins and veinlets but can also be found in the altered host rock. Sulphides account for 1% to 3% of the mineralization; the most common sulphides, in order of decreasing importance, are arsenopyrite, pyrite, pyrrhotite and stibnite. Graphite is also rarely observed as inclusions in smoky quartz veins.

The Contact and satellite zones are tabular mineralized envelopes oriented east-west and dipping very steeply to the north, turning south at depth. The economic portion of the zone has been traced from depths of approximately 450 metres to more than 1,500 metres below the surface. The Contact Zone has an average strike length of 300 metres, varies in thickness from 2.8 to 5.0 metres and is open at depth. Locally, some thicker intervals have been intersected but their continuity has not been demonstrated. The satellite zones have thicknesses similar to the Contact Zone.


Mining Methods

  • Transverse open stoping
  • Longitudinal retreat
  • Cemented backfill


Summary:

Lapa hosts an underground mining operation accessed by a 1,369-metre-deep shaft. Two mining methods are used – longitudinal retreat with cemented backfill, and locally transverse open stoping with cemented backfill. The dilution rate for mining the reserves averages 71%. The production rate has risen to 1,700 tonnes per day.


Crushing and Grinding


Processing

  • Gravity separation
  • Concentrate leach
  • Carbon in leach (CIL)
  • Cyanide (reagent)

Source: Subscription required

Summary:

Excavated ore is trucked to a dedicated Lapa plant at the LaRonde processing facility with grinding, gravity and leaching circuits. The Lapa facility consistently operates above its design rate of 1,500 tonnes per day. Concentrates from Lapa’s gravity and leach circuits are sent to the LaRonde refinery to produce doré bars.

Recoveries & Grades:

CommodityParameter20182017201620152014
Gold Recovery Rate, % 83.18983.886.580.9
Gold Head Grade, g/t 4.244.244.645.835.59

Production:

CommodityUnits201920182017201620152014
Gold oz  ......  Subscription required34,02648,41073,93090,96792,622
Silver oz  ......  Subscription required  ......  Subscription required
All production numbers are expressed as payable metal.
Subscription required - Subscription is required.

Operational Metrics:

Metrics201820172016201520142013
Tonnes milled 311,013 t398,248 t592,683 t559,926 t638,800 t640,422 t
Daily milling rate 1,090 t1,619 t1,534 t1,750 t

Reserves at December 31, 2017:

CategoryTonnage CommodityGradeContained Metal
Proven 127 kt Gold 3.75 g/t 15 koz
Proven & Probable 127 kt Gold 3.75 g/t 15 koz
Measured 159 kt Gold 3.62 g/t 18 koz
Indicated 576 kt Gold 4.07 g/t 75 koz
Measured & Indicated 734 kt Gold 3.97 g/t 94 koz
Inferred 587 kt Gold 7.16 g/t 135 koz

Commodity Production Costs:

CommodityUnits20182017201620152014
Credits (by-product) Gold USD -1 / oz -2 / oz -1 / oz
Cash costs Gold USD 819 / oz 801 / oz 717 / oz 578 / oz 659 / oz
Total cash costs Gold USD 873 / oz 757 / oz 732 / oz 591 / oz 667 / oz
Total cash costs Gold USD 872 / oz† 755 / oz† 732 / oz† 590 / oz† 667 / oz†
† Net of By-Product.

Operating Costs:

Units20182017201620152014
Total operating costs ($/t milled) CAD 123120121117107

Financials:

Units2018201720162015
Capital expenditures M USD 6.5  
Revenue M USD 39.8   64.6   92.2   104.8  
Gross profit M USD 11.7   24   8.3   21.3  


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 7, 2019
Subscription required - Subscription is required.

Staff:

EmployeesTotal WorkforceYear
Subscription required Subscription required 2018
Subscription required Subscription required 2017
Subscription required Subscription required 2016
Subscription required Subscription required 2015

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
Annual Information Form 2018
Annual Report 2018
Sustainability Report 2018
Year-end Mineral Reserves 2018
Annual Information Form 2017
Annual Report 2017
Quarterly Report 2017
Sustainability Report 2017
Annual Report 2016
Form 40-F 2016
Sustainability Report 2016
Year-end Mineral Reserves 2016
Annual Report 2015
Form 40-F 2015
Sustainability Report 2015
Annual Report 2014
Annual Report 2014
Form 40-F 2014
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Aerial view:

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