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Canada
Hollinger Mine (Porcupine Operation)

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 Location:
0 km E from Timmins, Ontario, Canada

  Address:
4315 Gold Mine Road
P.O. Box 70
South Porcupine
Ontario, Canada
P0N 1H0
Phone  ...  Subscription required
Fax+1-705-235-6551
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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2023
Hollinger 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
  • Porphyry


Summary:

The Hollinger Open Pit is a part of Porcupine Gold Mines, is situated in the gold-mining City of Timmins, in northern Ontario, Canada. The Porcupine Camp, located above a sequence of Archean basaltic volcanic rocks, led to the establishment of Timmins.

The Hollinger-McIntyre is a giant deposit, located in the Porcupine Mining Camp of northeastern Ontario.

The Hollinger-McIntyre deposit is hosted by mafic volcanic rocks of the central and upper Tisdale assemblages that are intruded by porphyritic intrusions. Mafic volcanic rocks in the deposit have generally been divided into three units: the Northern, Central and Vipond Formations.

The Hollinger Mine historically was developed on gold bearing veins which are structurally controlled by lithologic contacts and deformation zones associated with altered Central and Vipond Formation volcanics. These units strike N55E and 70 SE, and are folded into an anticline. The Northern formation occurs in the core of Central Tisdale Anticline. The Central Formation hosts most of the major veins systems in the Hollinger and McIntyre mines. It is comprised of a heterogeneous sequence and the basal units in the Central Formation are the most important ore hosts in the deposit. The Vipond Formation is the youngest volcanic package in the deposit area.

The lavas have been intruded by a group of porphyry stocks, the largest of which is the Pearl Lake Porphyry. The porphyries are generally conformable t ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

There is sufficient grade at specific gold price-points to mine a 150m deep pit, with the rock being processed at the nearby Dome Mine mill. The voids (sub-vertical stopes, shafts, and connecting drifts/drives) are sometimes spaced nearly 20-50m apart extending several hundred metres deep in a 2km square area beneath the City. The pit design was constrained by a regional highway (and the City’s water tower) along the northern wall, with homes and businesses on all other sides of the Property.

The Hollinger is being mined using three 6m and two 9m cuts making up 18m high benches in mostly FAIR to GOOD ground. All blasting is done with blast-mats to reduce fly-rock and noise. Because the mine is in-town, damage needs to be minimised. Earlier, blast trials were conducted to determine the depth of blast-damage induced by varying sizes of confined blasts. These trials indicated that a three-row trim shot onto a pre-sheared final wall would not induce excessive damage. To reduce the damage further, the pre-shear drill-hole spacing is adjusted for ground conditions within the immediate vicinity of voids.

This strategy sufficiently decreases the back-wall damage to less than 4m. The multi-use of probe holes to presupport the rock mass before blasting is part of the production cycle. Grouting cables into the final slopes, above and alongside voids, before blasting reduces the amount of final wall crown and wall rehabilitation required. This pattern has 8m cable-b ........


Crushing and Grinding


Processing

Flow Sheet: Subscription required

Summary:

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Combined production numbers are reported under Porcupine Operation

Operational Metrics:

Metrics20152014
Tonnes milled 954,400 t178,500 t

Reserves at December 31, 2021:
Cut-off grade utilized in 2021 reserves not less than 0.44 gram per tonne.

CategoryTonnage CommodityGradeContained Metal
Proven 5,900 kt Gold 1.6 g/t 310 koz
Probable 33,700 kt Gold 1.41 g/t 1,520 koz
Proven & Probable 39,600 kt Gold 1.44 g/t 1,830 koz
Measured 500 kt Gold 0.49 g/t 10 koz
Indicated 83,200 kt Gold 1.4 g/t 3,750 koz
Measured & Indicated 83,700 kt Gold 1.4 g/t 3,760 koz
Inferred 77,000 kt Gold 1.24 g/t 3,070 koz



Heavy Mobile Equipment as of June 27, 2019:
HME TypeModelQuantity
Drill ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 26, 2022
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
................................... Subscription required 2019
Other 2017
Annual Report 2015
Other 2010
Technical Report 2010
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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