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Canada
Timmins West Mine (Timmins Operation)

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 Location:
17 km SW from Timmins, Ontario, Canada

  Address:
1515 Government Rd S
Timmins
Ontario, Canada
P4R 1N4
Phone  ...  Subscription required
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Transverse stoping
  • Longitudinal stoping
  • Cemented backfill
  • Paste backfill
Processing
  • Gravity separation
  • Agitated tank (VAT) leaching
  • Carbon in leach (CIL)
  • Carbon in pulp (CIP)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
Mine Life6.5 years (as of Jan 1, 2017)


Owners

Source: p. 11
CompanyInterestOwnership
Pan American Silver Corp. 100 % Indirect
On February 22, 2019 the Company completed a transaction whereby Pan American acquired all of the issued and outstanding shares of Tahoe Resources Inc.

Deposit Type

  • Vein / narrow vein


Summary:

Gold mineralization in the Timmins, Thunder Creek, and 144 Gap Deposits occurs in steep northnorthwest plunging mineralized zones which plunge parallel to the local orientations of the L4 lineation features which also plunge parallel to the lineation, including folds and elongate lithologies. Mineralization occurs within, or along favourable lithostructural settings within 100 metres of the Holmer and Rusk Shear Zones. Mineralization comprises multiple generations of quartz-carbonatetourmaline ±albite veins, associated pyrite alteration envelopes, and disseminated pyrite mineralization. Textural evidence suggests that veining formed progressively through D3 and D4 deformation. All phases of gold-bearing veins cut and postdate the AIC and syenitic to monzonitic intrusions, although mineralization is often spatially associated with ore preferentially developed within these intrusive suites (Rhys, 2010).

At the Timmins Deposit, the character and sequence of veining in the Main, V1 and V2 veins is similar in all exposures. Rhys (2003) defined three phases of veining in the Timmins Deposit surface showings, all of which were also apparent in his recent observations (Rhys, 2010 and 2011), although an additional phase of shallow dipping quartz extension veins was also recognized during this field work (Rhys, 2010). The sequence of veining observed is as follows, with most veins in the upper Timmins Deposit mineralization forming composite veins which have this paragenetic sequence.

In the Thunder Creek area, there are two main styles of mineralization: 1) the Rusk Shear Zone adjacent to and in the footwall of the pyroxenite unit, and; 2) the Porphyry Zone which is hosted by the quartz monzonite intrusion which lies to the southeast in the immediate footwall to the Rusk Shear Zone below an elevation of approximately 500 metres below surface.

Mineralization in the Rusk Shear Zone comprises areas of either higher quartz-carbonate-pyrite vein density, and/or areas of elevated medium- to coarse-grained disseminated pyrite and associated pyritequartz veinlets. Both of these styles were observed to occur in the intensely foliated, often compositionally laminated carbonate-albite-quartz-magnetite portions of the shear zone. Mineralization also locally preferentially overprints pink, K-feldspar-rich syenite dykes and local plagioclase-dominant probable diorite dykes in the shear zone, with clots and aggregates of coarsepyrite, often associated with quartz-albite-carbonate veinlets.

“Porphyry Zone” mineralization is developed in the quartz monzonite intrusion that occurs at depth in the footwall to the Rusk Shear Zone immediately adjacent to areas of mineralization in the shear zone. Mineralization is associated with sheeted sets of quartz extension veins which occur in abundance of up to several veins per metre within the intrusion. Most veins are less than 3 centimetres thick and comprise white quartz with pyrite. Disseminated pyrite locally occurs in the wall rock adjacent to the veins and free visible gold was locally observed in association with pyrite both in veins and disseminated in the host rock.

Gold mineralization in the 144 Gap Deposit occurs generally between 600 and 1,000 metres below surface in the footwall of the high strain zone within and adjacent to syenite bodies in the footwall mafic volcanic lobe. The main mineralized areas occur between approximately 20 to 120 metres into the footwall of the high strain zone; however, mineralization also occurs locally within the shear zone itself. There are two main styles of mineralization identified in the 144 Gap Deposit area: 1) syenite-hosted quartz-pyrite extension vein sets and associated mineralization, and; 2) disseminated and vein-controlled pyrite in carbonate-sericite altered areas of higher strain in the shear zone and in altered mafic units along and within dyke margins.


Mining Methods

  • Transverse stoping
  • Longitudinal stoping
  • Cemented backfill
  • Paste backfill


Summary:

The Thunder Creek, Timmins, and 144 Gap deposits at the Timmins West Mine are accessed by a 5.5 metre diameter production shaft and 5 metre by 5 metre ramp from surface; the three deposits are connected by internal ramps and drifts.

Production from the Timmins, Thunder Creek and 144 Gap deposits comes from a combination of ore development and transverse and longitudinal longhole stoping. Sublevel spacing at the Timmins deposit is at 20 metre vertical intervals; sublevel spacing at the Thunder Creek and 144 Gap deposits is on 35 metre vertical intervals. Stopes are backfilled with either paste fill or cemented rock fill.


Crushing and Grinding


Processing

  • Gravity separation
  • Agitated tank (VAT) leaching
  • Carbon in leach (CIL)
  • Carbon in pulp (CIP)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Flow Sheet: Subscription required

Summary:

Ore from the Timmins West Mine is hauled via surface highway trucks to the Bell Creek Mill facility for processing.

Processing plant consists of a one stage crushing circuit, ore storage dome, one-stage grinding circuit with gravity recovery, followed by pre-oxidation and cyanidation of the slurry with CIL and CIP recovery.

Ore feed is dumped directly onto a 16” by 16” grizzly at the truck dump and a remote controlled rockbreaker is used to break up the oversized material. The ore is fed with an apron feeder to a series of conveyors reporting to a scalping grizley feeder in the crushing building. The openings between the fingers on the grizley feeder are 3.5”, with the oversize reporting to a 44” x 34” C110HD Metso jaw crusher. The jaw crusher is set to a closed side setting of 4”. The discharge from the crusher is combined with the -3.5” material from the grizley feeder and conveyed to the ore storage dome. The dome has a 20,000MT storage capacity, 6,000MT of w ........

Recoveries & Grades:

CommodityParameter201520142013
Gold Head Grade, g/t 4.44.74.63
Gold Recovery Rate, %  ......  Subscription required
Subscription required - Subscription is required.

Production:

CommodityUnits201520142013
Gold oz 139,000142,200107,151
All production numbers are expressed as metal in doré.

Operational Metrics:

Metrics20172016201520142013
Daily ore mining rate  ......  Subscription required2,600 t
Ore tonnes mined  ......  Subscription required0.7 Mt
Tonnes milled  ......  Subscription required1,011,000 t971,200 t747,491 t

Reserves at June 30, 2019:

CategoryTonnage CommodityGrade
Proven 0.4 Mt Gold 3.66 g/t
Probable 4.8 Mt Gold 2.98 g/t
Proven & Probable 5.2 Mt Gold 3.04 g/t
Measured 0.4 Mt Gold 3.81 g/t
Indicated 2.4 Mt Gold 3.48 g/t
Inferred 0.5 Mt Gold 3.85 g/t

Operating Costs:

Units2017
UG mining costs ($/t milled) USD 57.8
Processing costs ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units20182017
Capital expenditures (planned) M USD  ......  Subscription required
Capital expenditures M USD  ......  Subscription required
Sustaining costs M USD  ......  Subscription required
Subscription required - Subscription is required


Heavy Mobile Equipment as of May 15, 2017:
HME TypeModelSizeQuantity
Concrete sprayer 2
Drill (long hole) ....................... Subscription required 2
Drill jumbo (single boom) 1
Drill jumbo (two boom) 6
Excavator 1
Grader 1
Loader ....................... Subscription required 2
Loader ....................... Subscription required 1
Load-Haul-Dump (LHD) 9 cu. yd 1
Load-Haul-Dump (LHD) 10 cu. yd 4
Load-Haul-Dump (LHD) 6 cu. yd 8
Load-Haul-Dump (LHD) 3.5 cu. yd 1
Load-Haul-Dump (LHD) 2 cu. yd 1
Truck (underground) 30 t 1
Truck (underground) 50 t 6
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 29, 2020
....................... Subscription required ....................... Subscription required Subscription required Sep 29, 2020
....................... Subscription required ....................... Subscription required Subscription required Sep 29, 2020
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2018
................................... Subscription required 2018
................................... Subscription required 2018
................................... Subscription required 2018
Annual Information Form 2017
Technical Report 2017
Annual Information Form 2015
Financial Review 2015
Technical Report 2015
Annual Information Form 2014
Technical Report 2014
Annual Information Form 2013
Subscription required - Subscription is required.

Aerial view:

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