Canada

Hoyle Pond Mine

Click for more information

Categories

Overview

Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Longhole stoping
  • Shrinkage stoping
  • Mechanized Cut & Fill
Backfill type ... Lock
Production Start... Lock
ShapshotHoyle Pond mine is a part of Porcupine Operation.

Currently, about 60 percent of the Porcupine Operation's gold comes from the Hoyle Pond Mine.
Related AssetPorcupine Operation

Owners

SourceSource
CompanyInterestOwnership
Newmont Corp. 100 % Indirect
The Hoyle Pond mine is 100% indirectly owned by Newmont Corp.

Deposit type

  • Vein / narrow vein

Summary:

Mineralization at Hoyle Pond comprises multiple generations of quartz-carbonate-tourmaline albite veins, associated pyrite alteration envelopes, and disseminated pyrite mineralization.

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 and local arsenopyrite. Trace amounts of chalcopyrite and sphalerite have also been noted.

The Hoyle Pond Main Zone includes a series of generally northeast-striking, linked quartz vein zones. There are at least 11 veins of economic significance. These veins are folded on a small scale with moderate west and northeast plunging axes. The 1060 zone consists of at least five main vein structures with orientations ranging from north to northeast, are strongly boudinaged, and generally have a subvertical dip.

A series of auriferous zones occurs along what is termed the “South Trend”, stretching from the Bell Creek deposit (to the west of Hoyle Pond) for 6.4 km to the 1060 zone (includes Blackhawk–Vogel deposit, Owl Creek West, Owl Creek, Owl Creek East and the 950 zone). Mineralization in these zones consists of quartz–ankerite veining with varying amounts of pyrite, pyrrhotite and free gold.

Mining Methods

Lock

- subscription is required.

Comminution

Crushers and Mills

Milling equipment has not been reported.

Processing

Lock

- subscription is required.

Production

Combined production numbers are reported under Porcupine Operation

Operational metrics

Metrics20182015
Daily ore mining rate 1,300 t
Tonnes milled 362,300 t

Production Costs

Commodity production costs have not been reported.

Heavy Mobile Equipment

Lock

- subscription is required.

Personnel

Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 15, 2024
....................... Subscription required ....................... Subscription required Subscription required Apr 15, 2024
....................... Subscription required ....................... Subscription required Subscription required Apr 15, 2024
....................... Subscription required ....................... Subscription required Subscription required Apr 15, 2024
....................... Subscription required ....................... Subscription required Subscription required Apr 15, 2024

Aerial view:

Lock

- subscription is required.