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Mongolia
Boroo Mine

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 Location:
24 km SW from Zuunkharaa, Mongolia

  Regional Office:
Level 7, Blue Sky Office, Sukhbaatar District, 1st Khoroo, Peace Avenue 17
Ulaanbaatar
Mongolia
14240
Phone  ...  Subscription required
Fax(976)-11-316100
EmailEmail
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life7 years (as of Jan 1, 2021)
Boroo Pte Ltd. implemented significant optimization initiatives and restarted Boroo Gold mine operations in 2019 since its care and maintenance mode in 2016.

Heap Leach operation restarted in March 2019, followed by Boroo Mill operation restarted with throughput 5,500tpd in July 2020.

Pit Extension Project started at Boroo Gold Mine.


Owners

Source: p. 15
CompanyInterestOwnership
Boroo Pte Ltd. 100 % Indirect
The mines were previously owned and operated by Centerra Gold (TSE: CG) and Boroo Pte Ltd (then OZD Group) acquired 100% of its interests in October 2018.

Contractors

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Deposit Type

  • Vein / narrow vein
  • Breccia pipe / Stockwork
  • Intrusion related


Summary:

The Boroo gold deposit is a low silica Au+As sulphide system associated with a zone of quartz-sericite-pyrite (QSP) alteration in the sub horizontal Boroo fault. Boroo is a intrusion-related gold deposit and hosted by a Cambrian-Ordovician sequence of highly deformed shales, siltstones and fine sandstones of the Haraa turbidite sediments, and the Paleozoic granitoids of the Boroo Complex.

The bulk mineable gold mineralization at Boroo is hosted in a strongly quartz sericite altered and sulfidized nearly flat lying zone controlled by the Boroo fault. The fault has been traced for a distance of 2.4 km and is thought to be a thrust fault that dips at an angle of 10° to the north west and trending north east. It cuts across the intrusive contact between sediments and granitic rocks in the north, but is entirely contained within the sediments in the south.

In the cross section, the Boroo fault shows a slightly undulated shape with the structure becoming thicker to the northwest, where the alteration and mineralization decrease. The Boroo fault is variously altered and mineralized, and where these features are strongest, individual deposits are formed. These are termed, from north to south, Pit 2, 3, 5 and 6. All of the deposits are elongated in a northeasterly direction, with a length to width ratio of about two to one. In Pit 2, 5 and 6, mineralisation is controlled by Boroo fault and is in the foot wall. But in Pit 3, there is low grade mineralisation in b ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Boroo Gold Mine is a conventional open pit mine started in 2003 and located in north central Mongolia, Selenge Province in Bayangol and Mandal counties (known as soum in Mongolia) approximately 140 kilometers (km) northeast of the capital Ulaanbaatar.

The BGM operation uses ores from existing and extended open pit hard rock deposits, including the satellite Ulaanbulag pit, as well as placer deposits located within the BGM concession area.


Crushing and Grinding


Processing

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Summary:

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Production:
Since acquisition, Boroo restarted operations in 2019 since its care and maintenance mode in 2016. Heap Leach operation restarted in March 2019, followed by Boroo Mill operation restarted with throughput 5,500tpd in July 2020.

CommodityUnits20212020
Gold koz  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré.
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Operational Metrics:

Metrics20142013
Tonnes milled 2,083 kt2,394 kt
Total tonnes mined

Reserves at December 31, 2017:
The unconstrained open pit mineral resources are estimated as all material below the pit above 0.5 grams of gold per tonne cut-off grade.

CategoryTonnage CommodityGradeContained Metal
Measured 452 kt Gold 2.2 g/t 32 koz
Indicated 4,464 kt Gold 1.5 g/t 210 koz
Measured & Indicated 4,916 kt Gold 1.5 g/t 242 koz
Inferred 7,323 kt Gold 1 g/t 235 koz



Heavy Mobile Equipment as of October 15, 2020:
HME TypeModelQuantity
Excavator ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 14, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 14, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 14, 2022
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2021

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
Annual Report 2017
Year-end Mineral Reserves 2017
Annual Report 2014
Annual Report 2013
Technical Report 2009
Subscription required - Subscription is required.

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