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Mongolia
Oyu Tolgoi Mine (Hugo North Lift 1 Project)

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 Location:
539 km SW from Ulaanbaatar, Mongolia

  Regional Office:
Monnis Tower, Chinggis Avenue 15
Sukhbaatar District - 14240
Ulaanbaatar
Mongolia
Phone  ...  Subscription required
Fax+976-11-331890
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit & Underground
Commodities
  • Copper
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
  • Block caving
Production Start...
Mine Life31 years (as of Jan 1, 2020)
Located in Mongolia’s South Gobi Desert, Oyu Tolgoi is one of the world’s largest copper-gold mines.
Latest NewsRio Tinto completes acquisition of Turquoise Hill     December 16, 2022


Owners

Source: p. 276,390
CompanyInterestOwnership
Rio Tinto plc (operator) 33.66 % Indirect
Erdenes Oyu Tolgoi LLC 34 % Indirect
Oyu Tolgoi LLC is jointly owned by Erdenes Oyu Tolgoi LLC (34%), which is controlled by the Government of Mongolia, and Turquoise Hill Resources Ltd (66%, of which Rio Tinto owns 51%).

Contractors

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Deposit Type

  • Porphyry
  • Vein / narrow vein


Summary:

The mineral deposits at Oyu Tolgoi lie in a structural corridor where mineralization has been discovered over a 26 km strike length. Four deposits hosting Mineral Resources have been identified: Oyut, Hugo North, Hugo South, and Heruga.

Tolgoi copper-gold deposits currently comprise, from north to south:
• Hugo North – The Hugo Dummett Deposit north of approximately 4766300 N (or the 110 Fault).
• Hugo South - The Hugo Dummett Deposit south the 110 Fault.
• Oyut - The Oyut Deposit includes the Southwest Oyu, South Oyu, Wedge, Central Oyu, Bridge, Western, and Far South zones within mining licence MV-006709.
• Heruga – is within the area governed by the arrangements between Oyu Tolgoi LLC and Entrée LLC except for a small northern portion that lies within the Oyu Tolgoi mining licence MV-006709.

The Oyut deposit is currently being mined as an open pit using conventional drill, blast, load, and haul methods. The Hugo North deposit is currently being developed as an underground mine using the block caving mining method. A staged approach is envisaged for developing the Hugo North deposit, involving mining two block cave lifts (Lift 1 and potentially Lift 2). Mineral Reserves have been estimated for Lift 1, which comprises three panels (Panel 0, Panel 1, and Panel 2).

Hugo South and Hugo North
The Hugo Dummett deposits, Hugo North and Hugo South, contain porphyry-style mineralization associated with quartz-monzodiorite int ........


Mining Methods

  • Truck & Shovel / Loader
  • Block caving


Summary:

The initial investment decision to construct Phase 1 of Oyu Tolgoi was made in 2010. Mining of the Oyut deposit started in 2012 using open pit mining methods. The Oyut open pit mine currently has an ore production rate of about 40 Mtpa. Part of the initial investment decision to develop Phase 1, included continued investment into the development of the Hugo North underground mine as a block caving operation (Phase 2 of the Project). Development of Phase 2 commenced in July 2016.

The current production rate from the Oyut open pit continues until 2023, after which it will be progressively reduced as production builds up from underground. Open pit mining will continue in parallel with Hugo North Lift 1 to keep the Oyu Tolgoi concentrator operating at its design capacity. Following depletion of Lift 1, production from the Oyut open pit will be increased to meet mill capacity.

Oyut open pit mining
Open pit mining is carried out using conventional drill, blast, load, and haul methods and is conducted 24 hours per day, 365 days per year.

The slope design criteria which are based on the Golder 2012 Study are summarized as follows:
- Single, 15 m bench height (or batter) in all rock slopes.
- Maximum bench face angle of 65° in weathered zone.
- Average bench face angle of 70° in bedrock zone.
- Minimum berm width of 7.5 m
- Where structural controls are present, berm widths of 9 m, 12 m, and 15 m are applied to be consiste ........


Crushing and Grinding
Source: Subscription required

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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityProductUnits2022202120202019201820172016
Copper Metal in concentrate kt  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required159157201
Gold Metal in concentrate koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required725722
Silver Metal in concentrate koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics2021202020192018
Total tonnes mined  ......  Subscription required  ......  Subscription required101,316 kt91,310 kt
Tonnes processed  ......  Subscription required  ......  Subscription required40,777 kt38,738 kt
Subscription required - Subscription is required.

Reserves at December 31, 2021:
For the Oyut Mineral Reserve, processing and G&A costs used to determine NSR cut-off values vary between $7.67/t and $11.12/t depending on the ore type processed.
For the Hugo North Mineral Reserve, NSR shut off grade of $20.79/t is used to determine the point at which each underground drawpoint is closed.

For the Oyut deposit, a cut-off grade of 0.25% CuEq has been used for Mineral Resources with open pit potential.
For Hugo North and Oyut underground, a cut-off grade of 0.46% CuEq grade was used based on the assumption that the deposits will be mined using underground mass mining methods.
For Hugo South and Heruga, a cut-off grade of 0.41% CuEq grade which is unchanged from previous reporting.

CategoryTonnage CommodityGradeContained Metal
Proven 260 Mt Copper 0.52 % 1.4 Mt
Proven 260 Mt Gold 0.37 g/t 3.1 M oz
Proven 260 Mt Silver 1.3 g/t 10.9 M oz
Probable 950 Mt Copper 0.94 % 8.9 Mt
Probable 950 Mt Gold 0.27 g/t 8.3 M oz
Probable 950 Mt Silver 2.12 g/t 64.8 M oz
Proven & Probable 1,210 Mt Copper 0.85 % 10.3 Mt
Proven & Probable 1,210 Mt Gold 0.29 g/t 11.5 M oz
Proven & Probable 1,210 Mt Silver 1.94 g/t 75.7 M oz
Measured 82 Mt Copper 1.42 % 1.2 Mt
Measured 82 Mt Gold 0.52 g/t 1.4 M oz
Measured 82 Mt Silver 3.3 g/t 8.6 M oz
Indicated 610 Mt Copper 1.17 % 7.1 Mt
Indicated 610 Mt Gold 0.39 g/t 7.7 M oz
Indicated 610 Mt Silver 2.9 g/t 64.7 M oz
Measured & Indicated 692 Mt Copper 1.2 % 8.3 Mt
Measured & Indicated 692 Mt Gold 0.41 g/t 9 M oz
Measured & Indicated 692 Mt Silver 2.9 g/t 64.7 M oz
Inferred 3,700 Mt Copper 0.59 % 21.8 Mt
Inferred 3,700 Mt Gold 0.29 g/t 34.4 M oz
Inferred 3,700 Mt Silver 1.7 g/t 207.5 M oz

Commodity Production Costs:

CommodityUnits20222021202020192018
All-in sustaining costs (AISC) Copper USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 2.2 / lb†  
C1 cash costs Copper USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 1.59 / lb†  
^ Guidance / Forecast.
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units2021202020192018
OP mining costs ($/t mined) USD 2.241.81.882.13
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units2022202120202019201820172016
Capital expenditures (planned) M USD  ......  Subscription required
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 1,284   901   322  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 1,180   940   1,203  
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 69   36   52  
EBITDA M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 375   256   436  
Operating Cash Flow M USD  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required


Pipelines
TypeMaterialDiameterLengthDescription


Heavy Mobile Equipment as of June 30, 2020:
HME TypeModelSizeQuantity
Bulldozer ....................... Subscription required ....................... Subscription required
Bulldozer ....................... Subscription required ....................... Subscription required
Dozer (rubber tire) ....................... Subscription required ....................... Subscription required
Drill 172 mm ....................... Subscription required
Drill (blasthole) ....................... Subscription required ....................... Subscription required
Drill (blasthole) ....................... Subscription required ....................... Subscription required
Excavator ....................... Subscription required ....................... Subscription required
Excavator ....................... Subscription required ....................... Subscription required
Grader ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Loader (FEL) ....................... Subscription required 18 cu. m ....................... Subscription required
Shovel (hydraulic) ....................... Subscription required 34 cu. m ....................... Subscription required
Shovel (rope) ....................... Subscription required 56 cu. m ....................... Subscription required
Truck (dump) ....................... Subscription required 290 t ....................... Subscription required
Truck (service) ....................... Subscription required ....................... Subscription required
Truck (service) ....................... Subscription required ....................... Subscription required
Truck (water) ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 10, 2022
....................... Subscription required ....................... Subscription required Subscription required May 10, 2022
....................... Subscription required ....................... Subscription required Subscription required May 10, 2022
....................... Subscription required ....................... Subscription required Subscription required May 10, 2022
....................... Subscription required ....................... Subscription required Subscription required May 10, 2022
....................... Subscription required ....................... Subscription required Subscription required May 10, 2022
....................... Subscription required ....................... Subscription required Subscription required May 10, 2022
....................... Subscription required ....................... Subscription required Subscription required May 10, 2022
....................... Subscription required ....................... Subscription required Subscription required May 10, 2022
....................... Subscription required ....................... Subscription required Subscription required May 10, 2022
....................... Subscription required ....................... Subscription required Subscription required May 10, 2022
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2021
Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required 2017
Subscription required 2016
Subscription required 2015
Subscription required 2014
Subscription required 2013

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
Press Release 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Feasibility Study Report 2018
Press Release 2018
Annual Report 2016
Fact Sheet 2016
Financial Review 2016
Annual Report 2015
Financial Review 2015
Technical Report 2014
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News:

NewsDate
Rio Tinto completes acquisition of Turquoise Hill December 16, 2022
Green light for Turquoise Hill takeover December 12, 2022

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