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Canada
Holt Mine (Holt Complex)

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 Location:
53 km E from Matheson, Ontario, Canada

  Address:
Highway 101 East, Box 609
Matheson
Ontario, Canada
P0K 1N0
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WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StatusCare and Maintenance
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Longhole stoping
  • Open stoping
  • Avoca
  • Longitudinal retreat
  • Room-and-pillar
  • Cemented backfill
Production Start...
Mine Life2025
Holt Mine Complex consists of three mines: The Holt Mine and Mill and the Holloway Mine, and the Taylor Mine located approximately 68 km by road west of the Holt Mill.

Operations were suspended at the Holt Complex effective April 2, 2020 as part of the Company’s COVID-19 response and while the Company conducted a strategic review of these assets. In July 2020, the Company announced that the suspension of operations at Holt Complex would be extended until further notice. As a result, there was no production, sales, operating costs or capital expenditures from Holt Complex in Q3 2021 or YTD 2021. Care and maintenance costs in YTD 2021 related to Holt Complex totalled $3.7 million ($0.8 million in Q3 2021). In addition, the Company recorded an asset impairment of $6.5 million related to the disposal of equipment at the Holt Complex in Q1 2021.


Owners

Source: p. 1
CompanyInterestOwnership
Agnico Eagle Mines Ltd. 100 % Indirect
St Andrew Goldfields Ltd. is a wholly-owned subsidiary of Kirkland Lake Gold Ltd.

Kirkland Lake Gold Ltd owns the Holt Complex, which includes three wholly owned mines, the Taylor mine (“Taylor”), Holt mine (“Holt”) and Holloway mine (“Holloway”), as well as a central milling facility, the Holtmill.

February 8, 2022 – Agnico Eagle Mines Limited and Kirkland Lake Gold Ltd. are pleased to announce the successful completion of the previously announced merger of equals transaction (the “Merger”).

The combined company will continue as Agnico Eagle Mines Limited.

Contractors

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Deposit Type

  • Carbonate replacement
  • Vein / narrow vein
  • Volcanic hosted


Summary:

Regional Geology
The Holloway and Holt mines lie within the Southern Abitibi Greenstone Belt (SAGB) of the Superior Province in north-eastern Ontario. The 40 km long, mostly contiguous HoltHolloway property package is a grouping of strategically located claims straddling the Porcupine-Destor Fault Zone (“PDF”) midway along its 260 km length.

Local Geology
The deformation history of the area is defined by five events. The earliest episode of regional D1 deformation (compression and extension) predated the Porcupine angular unconformity at 2,690 Ma. The D2 event (compression and extension) post-dated the Porcupine assemblage and resulted in localized folding and thrusting and early southside up, dip-slip, ductile deformation on regional deformation zones. Broadly synchronous with the syntectonic opening of the Timiskaming basins in dilatational jogs was D3 folding that resulted in significant left lateral slip movement along the PDF. The D4 folding event created synclines within the Timiskaming assemblage rocks and rightlateral strike-slip displacement along the PDF. The D4-D5 event represents the final stage of transpressional deformation along the PDF. Gold mineralization in the HoltHolloway area is interpreted to be early D3 in age. Lightning Zone replacement mineralization is cut by an inter-mineral dike with an age of 2672 ± 1.9Ma, which is overprinted by a later auriferous quartz-carbonate veining event. The bulk of the gold in the Timm ........


Mining Methods

  • Longhole stoping
  • Open stoping
  • Avoca
  • Longitudinal retreat
  • Room-and-pillar
  • Cemented backfill


Summary:

Design Criteria
Mining activities at the Holt mine occur in multiple zones concentrated in two regions within the mine. The western region of the mine contains Zone 4 (Upper and Lower), Zone 4 East, V-93 and West McKenna. The eastern region contains Zone 6 (Upper and Lower), Zone 7, U-100 and the remnant pillars of the C-104 Zone (Figure 15-1). All of the planned zones are accessed from existing rail haulage development headings; therefore, the equipment used in each zone remains captive. The Tousignant Zone will be mined as an autonomous zone from surface via a decline access.

The main accesses for all zones are concentrated on four active rail haulage levels: 435, 775, 925 and 1075. Ore is transported on these haulage levels to the shaft ore pass system. Ramp access is available between 1075 and 775 haulage levels. Zone 6 and C-104 have limited access between mining fronts. Zone 4 is accessed from both 925 and 1075 rail haulage levels, with an internal ramp system connecting the upper and lower portions of the zone.

Zone 4
Zone 4 represents the bulk of the mining since resuming operations at the Holt mine in 2010. This zone presents several design challenges due to its geometry: the zone dips at 30? to the horizontal and plunges from the east to the west at approximately 10?. The plunge, in particular, makes the installation of service raises and holes challenging. Ore passes in the zone consist of a series of conventional r ........


Crushing and Grinding
Flow Sheet: Source


Processing

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Summary:

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Production:

CommodityUnits20182017201620142013
Gold oz 67,77066,67757,08662,63358,898
All production numbers are expressed as metal in doré.
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Operational Metrics:

Metrics20182017201620142013
Tonnes milled 471,819 t462,987 t416,048 t442,108 t369,657 t
Daily mining rate 1,350 t

Reserves at December 31, 2018:

CategoryTonnage CommodityGradeContained Metal
Proven & Probable 3,580 kt Gold 4.3 g/t 491 koz
Measured & Indicated 6,883 kt Gold 4 g/t 895 koz
Inferred 8,523 kt Gold 4.7 g/t 1,286 koz

Commodity Production Costs:

CommodityUnits201820172016
Cash costs (sold) Gold USD 679 / oz   685 / oz   623 / oz  
Total cash costs (sold) Gold USD
All-in sustaining costs (sold) Gold USD 1,097 / oz   1,043 / oz   1,061 / oz  

Financials:

Units201820172016
Sustaining costs M USD 21.7   5.4  
Capital expenditures M USD 22.1   14   16.8  
Revenue M CAD
Sales margin M CAD



Heavy Mobile Equipment as of December 31, 2016:
HME TypeModelSizeQuantity
Drill jumbo (single boom) ....................... Subscription required ....................... Subscription required
Rockbreaker ....................... Subscription required
Scoop Tram ....................... Subscription required ....................... Subscription required
Scoop Tram ....................... Subscription required ....................... Subscription required
Scoop Tram 2.5 cu. yd ....................... Subscription required
Scoop Tram ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 6, 2022
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Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Management Discussion & Analysis 2018
Press Release 2018
Press Release 2018
Management Discussion & Analysis 2017
Corporate Presentation 2016
Financial Review 2016
Management Discussion & Analysis 2016
Press Release 2016
Technical Report 2016
Annual Report 2014
Technical Report 2013
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Subscription required - Subscription is required.

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