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United States
Turquoise Ridge Operation (Turquoise Ridge Surface Mine)

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 Location:
127 km NW from Elko, Nevada, United States
  Regional Office:
1655 Mountain City Hwy
Elko
Nevada, United States
89801
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News
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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Drift & Fill
  • Longhole stoping
  • Longitudinal stoping
  • Cemented backfill
Production Start...
Mine Life2044
Under the Nevada Gold Mines joint venture (was formed on July 1, 2019), Barrick’s Turquoise Ridge Mine and Newmont’s Twin Creeks Complex were combined as a single operation, now known as Turquoise Ridge.

Now the Turquoise Ridge Complex consists of Turquoise Ridge Underground, Vista Underground, Turquoise Ridge Surface (Newmont’s former Twin Creeks mining complex), which is consisting of the Mega and Vista Pits, one oxide mill (Juniper), one refractory mill (Sage) with two autoclaves, one active leach pad (Izzenhood).

Turquoise Ridge Surface has currently paused mining in the open pits, while ore from stockpiles is processed. Mining from the open pits is expected to resume in the medium to long-term and continue until 2034.

Owners

Source: p. 81
CompanyInterestOwnership
Newmont Corp. 38.5 % Indirect
Barrick Gold Corp. (operator) 61.5 % Indirect
Prior to July 1, 2019, Barrick owned 75% of Turquoise Ridge with its joint venture partner, Newmont, owning the remaining 25%. On July 1, 2019, Barrick’s 75% interest in Turquoise Ridge and Newmont’s 100% interest in Twin Creeks and 25% interest in Turquoise Ridge were contributed to Nevada Gold Mines joint venture and are now collectively referred to as Turquoise Ridge.

Barrick is the operator of the joint venture and owns 61.5%, with Newmont owning the remaining 38.5% of the joint venture.

Contractors

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Deposit Type

  • Carlin-type
  • Sediment-hosted

Summary:

The Turquoise Ridge deposit is a typical Carlin-type deposit and is characterized by structurally and stratigraphically controlled, sediment-hosted, replacement deposits containing disseminated micron sized gold.

The Turquoise Ridge Complex is situated within the Basin and Range province, near the northeast end of the Osgood Mountains. The Osgood Range is underlain by Cambrian Osgood Mountain Quartzite, Cambrian Preble Formation, Ordovician “Comus” Formation and the “upper plate” Valmy Formation. These units are unconformably overlain by the Permian Etchart Formation (Antler Peak Equivalent) of the Roberts Mountains overlap assemblage, and by the Triassic Golconda allochthon. These uppermost units form a belt of outcrops flanking the western and northern sides of the Osgood Range. All of these units are intruded upon by two generations of felsic intrusive rocks – a set of 114 Ma dacite dikes and sills at Turquoise Ridge Underground and Turquoise Ridge Surface and the 92 Ma Osgood Stock and temporally related dikes and sills. To date, no Eocene intrusive rocks have been identified at the Getchell, Turquoise Ridge Surface, or Pinson camps.

Mineralization of the Turquoise Ridge Underground deposit generally consists of disseminated, micron-sized gold occurring in arsenic-rich rims forming on pyrite, chiefly within decalcified, carbonaceous rocks. All gold bearing zones at Turquoise Ridge Underground are located in proximity to granodiorite dykes that splay ........

Mining Methods

  • Drift & Fill
  • Longhole stoping
  • Longitudinal stoping
  • Cemented backfill

Summary:

The combined mining operation is comprised of the Turquoise Ridge Underground, Vista Underground, and Turquoise Ridge Surface (comprised of the Mega and Vista open pits).

Turquoise Ridge Underground covers an aggregate area of 2,402 hectares, which consists of 1,145 hectares of unpatented mining and mill-site claims and 1,257 hectares of patented/fee land. Turquoise Ridge Surface covers a total area of 12,092 hectares, of which 7,102 hectares are unpatented mining claims and 4,989 hectares are patented/fee lands. All Vista Underground mining activities are contained within the Turquoise Ridge Surface mining footprint and claim areas.

Turquoise Ridge Underground produces high-grade refractory (carbonaceous/sulphide) gold ore from a long- life (currently 22 years) underground operation, accessed via three shafts and a system of internal ramps, and utilizes underhand drift-and-fill and long-hole stoping mining methods with cemented aggregate backfill. Turquoise Ridge Underground is currently hoisting 2,570 tonnes of ore per day, which is expected to ramp up following the full commissioning of the Third Shaft 2280 level skipping station. Vista Underground is a portal and ramp accessed vein-style stoping mine which produces approximately 560 tonnes of ore per day, with approximately one year of mine life remaining. Turquoise Ridge Surface has currently paused mining in the open pits, while ore from stockpiles is processed. Mining from the open pits is expect ........

Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits2023202220212020201920182017
Gold koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required357281
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
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Operational Metrics:

Metrics202220212020201920182017
Ore tonnes mined  ......  Subscription required  ......  Subscription required9,794 kt3,330 kt893.3 kt857.3 kt
Waste OP  ......  Subscription required  ......  Subscription required15,382 kt11,198 kt
Total tonnes mined  ......  Subscription required  ......  Subscription required25,176 kt14,528 kt
Tonnes processed  ......  Subscription required  ......  Subscription required5,875 kt2,935 kt805.3 kt629.3 kt
Daily ore mining rate  ......  Subscription required  ......  Subscription required
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Reserves at December 31, 2022:

CategoryTonnage CommodityGradeContained Metal
Proven 34 Mt Gold 6.26 g/t 6.7 M oz
Probable 21 Mt Gold 9.33 g/t 6.2 M oz
Proven & Probable 54 Mt Gold 7.43 g/t 13 M oz
Measured 59 Mt Gold 4.72 g/t 9 M oz
Indicated 65 Mt Gold 5.19 g/t 11 M oz
Inferred 14 Mt Gold 2.9 g/t 1.3 M oz

Commodity Production Costs:

CommodityUnits2023202220212020201920182017
Cash costs Gold USD 678 / oz   589 / oz  
Total cash costs Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Total cash costs Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All-in sustaining costs (AISC) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 756 / oz   733 / oz  
All-in sustaining costs (AISC) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All-in costs Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 916 / oz   753 / oz  
All-in costs Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
† Net of By-Product.
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Operating Costs:

Units20222021202020192018201720162015
OP mining costs ($/t mined) USD 5.02  3.5  2.5  2.2  
UG mining costs ($/t mined) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
UG mining costs ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
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Financials:

Units2022202120202019201820172016
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 27   43   43  
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 83   48   43  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 441   373   429  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
EBITDA M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 205   196   257  
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Pipelines and Water Supply
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Heavy Mobile Equipment:
HME TypeModelSizeQuantityRef. Date
Dozer ....................... Subscription required ....................... Subscription required Dec 31, 2019
Dozer (rubber tire) ....................... Subscription required ....................... Subscription required Dec 31, 2019
Dozer (rubber tire) ....................... Subscription required ....................... Subscription required Dec 31, 2019
Drill ....................... Subscription required ....................... Subscription required Dec 31, 2019
Drill ....................... Subscription required ....................... Subscription required Dec 31, 2019
Drill jumbo (single boom) ....................... Subscription required Dec 31, 2019
Drill jumbo (two boom) ....................... Subscription required Dec 31, 2019
Drill jumbo (two boom) ....................... Subscription required Sep 22, 2022
Excavator ....................... Subscription required ....................... Subscription required Dec 31, 2019
Excavator ....................... Subscription required ....................... Subscription required Dec 31, 2019
Excavator ....................... Subscription required 35 cu. yd ....................... Subscription required Dec 31, 2019
Excavator ....................... Subscription required 27 cu. yd ....................... Subscription required Dec 31, 2019
Grader ....................... Subscription required ....................... Subscription required Dec 31, 2019
Grader ....................... Subscription required ....................... Subscription required Dec 31, 2019
Loader ....................... Subscription required ....................... Subscription required Dec 31, 2019
Loader ....................... Subscription required ....................... Subscription required Dec 31, 2019
Loader ....................... Subscription required ....................... Subscription required Dec 31, 2019
Load-Haul-Dump (LHD) ....................... Subscription required ....................... Subscription required Dec 31, 2019
Load-Haul-Dump (LHD) ....................... Subscription required ....................... Subscription required Dec 31, 2019
Load-Haul-Dump (LHD) ....................... Subscription required Sep 22, 2022
Rock bolter ....................... Subscription required Dec 31, 2019
Scraper ....................... Subscription required ....................... Subscription required Dec 31, 2019
Truck (haul) ....................... Subscription required ....................... Subscription required Dec 31, 2019
Truck (haul) ....................... Subscription required ....................... Subscription required Dec 31, 2019
Truck (haul) ....................... Subscription required ....................... Subscription required Dec 31, 2019
Truck (underground) ....................... Subscription required Sep 22, 2022
Truck (water) ....................... Subscription required ....................... Subscription required Dec 31, 2019
Truck (water) ....................... Subscription required ....................... Subscription required Dec 31, 2019
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 3, 2023
....................... Subscription required ....................... Subscription required Subscription required Aug 3, 2023
....................... Subscription required ....................... Subscription required Subscription required Aug 3, 2023
....................... Subscription required ....................... Subscription required Subscription required Aug 3, 2023
....................... Subscription required ....................... Subscription required Subscription required Aug 3, 2023
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Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2022
Subscription required 2021
Subscription required 2020
Subscription required 2019

Corporate Filings & Presentations:

DocumentYear
Annual Information Form 2022
Annual Report 2022
Corporate Presentation 2022
Quarterly Report 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Other 2018
Press Release 2018
Quarterly Report 2018
Technical Report 2018
Other 2017
Other 2017
Press Release 2017
Quarterly Report 2017
Corporate Presentation 2016
Management Discussion & Analysis 2016
Other 2016
Press Release 2015
Annual Report 2014
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