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Canada
Hoyle Pond Mine (Porcupine Operation)

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 Location:
18 km E from Timmins, Ontario, Canada

  Address:
4315 Gold Mine Road
P.O. Box 70
South Porcupine
Ontario, Canada
P0N 1H0
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Fax+1-705-235-6551
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  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Cut & Fill
  • Mechanized Cut & Fill
  • Shrinkage stoping
  • Longhole stoping
  • Paste backfill
Production Start...
Hoyle Pond is part of Porcupine Operation.


Owners

Source: p. 38
CompanyInterestOwnership
Newmont Corp. 100 % Indirect
On April 18, 2019, Newmont Mining Corp. and Goldcorp Inc. completed their merger to form Newmont Goldcorp Corp.

Contractors

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Deposit Type

  • Vein / narrow vein


Summary:

The Hoyle Pond Main Zone and 1060 Zone deposits occur on opposite limbs of an open, northeast-plunging antiformal structure, hosted within carbonatized north-dipping tholeiitic basalts. The 7 Vein System occurs as a series of stacked, flat to gently northeast-dipping veins in the nose of the antiformal structure.

The Hoyle Pond Main Zone includes a series of generally northeast-striking, linked, quartz vein zones folded on a small scale with moderate west- and northeast-plunging axes.

The 1060 Zone consists of at least five main vein structures (1060 B1, B2 and B3 zones, A zone and Porphyry zone) with orientations ranging from north to northeast and a generally subvertical dip. The veins are strongly boudinaged, with the long axis of the boudin oriented from subhorizontal to shallow west–southwest plunging.

Alteration
The mineralization at Hoyle Pond occurs as coarse free gold in white to grey–white quartz veins with a variable ankerite, tourmaline, pyrite, and locally arsenopyrite, content. Alteration halos are generally narrow, consisting of mainly grey zones (carbon, carbonate, sericite, cubic pyrite) in the Hoyle Pond system and carbonate–sericite, plus fuchsite with pyrite, arsenopyrite and trace amounts of chalcopyrite and sphalerite within the 1060 structure.

Gold at the Hoyle Pond Mine predominantly occurs as coarse free gold in white to greyishwhite quartz veins with variable ankerite, tourmaline, pyrite, pyrrhotite an ........


Mining Methods

  • Cut & Fill
  • Mechanized Cut & Fill
  • Shrinkage stoping
  • Longhole stoping
  • Paste backfill


Summary:

Access to the underground workings is by means of two ramps, one at either end of the ore body and a four-compartment shaft.

The Hoyle Pond mine hosts a variety of ore shapes. In order to maximize the stoping efficiency, numerous stoping methods are used.

Conventional cut and fill, shrinkage and panel mining methods are typically employed to excavate the narrower gold bearing vein structures. Each of the preceding mining methods is used to extract vein structures with vertical and/or near horizontal attitudes. Veins mined by these methods typically range from 0.20 meters to 2.0 meters thick and are usually higher grade material. Mucking is accomplished using appropriately sized slushers.

Longhole methods with paste backfilling are used in wider stoping areas. Longhole levels are advanced at 60 meter intervals with sub levels at a 20 m interval. Haulage drifts are driven in the footwall about 12 meters offset from the ore zone. Backfilling methods were traditionally a combination of rock fill and cemented slag but these methods have been replaced with high quality paste backfill delivered through holes from surface and distributed with a network of underground piping.


Crushing and Grinding


Processing

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Summary:

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Combined production numbers are reported under Porcupine Operation

Operational Metrics:

Metrics20152014
Tonnes milled 362,300 t321,500 t

Reserves at December 31, 2021:
Cut-off grade utilized in 2021 reserves not less than 4.00 gram per tonne.

CategoryTonnage CommodityGradeContained Metal
Proven 2,300 kt Gold 7.24 g/t 530 koz
Probable 900 kt Gold 7.97 g/t 240 koz
Proven & Probable 3,200 kt Gold 7.46 g/t 770 koz
Measured 300 kt Gold 5.25 g/t 50 koz
Indicated 900 kt Gold 6.12 g/t 180 koz
Measured & Indicated 1,200 kt Gold 5.92 g/t 230 koz
Inferred 1,100 kt Gold 6.43 g/t 220 koz



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 28, 2022
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Corporate Filings & Presentations:

DocumentYear
Annual Report 2015
Technical Report 2006
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