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Russia
Taborny (Neryungri) Mine

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 Location:
126 km NE from Chara, Russia

  Regional Office:
70 let Oktyabrya Street, 3/55
Neryungri
Russia
678976
Phone  ...  Subscription required
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
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Processing
  • Calcining
  • Smelting
  • Heap leach
  • Elution
  • Carbon adsorption-desorption-recovery (ADR)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
Mine Life7.5 years (as of Jan 1, 2016)
From 2021, the Company is planning to start the development of the nearby Vysoky deposit, and also the Vrezanny satellite deposit approximately 5 km to the West in the Tokko licence area from 2023. The ore from these satellite deposits will be transported to the existing mine for further processing.


Owners & OPERATOR

Source: p. 128, 130
CompanyInterestOwnership
Nord Gold plc 100 % Indirect
LLC Rudnik Taborny (operator) 100 % Direct
During 2018 LLC Rudnik Taborny owing Taborny gold deposit was separated from LLC Neryungri metallic owing Gross gold deposit in order to separate legal entities running dif-ferent licenses.

Deposit Type

  • Sediment-hosted
  • Sandstone hosted
  • Metamorphic hosted
  • Syenite hosted


Summary:

The Taborny deposit is a structurally controlled zone of potassic metasomatism, hosted by Proterozoic sandstones. The mineralised zone dips moderately to the south and southsoutheast. Parallel to Taborny, and approximately 500 m south, is the smaller Temny deposit.

Between Taborny and Temny are mineralised linking structures, and both deposits are covered by the same block model and one pit design, therefore “Taborny-Temny” is often referred to as a single entity. Mineralisation at Taborny-Temny is associated with iron and manganese oxides, that follow from primary sulphides, particularly pyrite. Approximately 1.5 km southwest of Taborny, and hosted by the same Proterozoic sandstone succession, is the Vysoky deposit. The Vrezanny deposit, 4 km west-northwest of Taborny, is also included as a satellite of Taborny, although the geological setting is different from Taborny, being hosted by granite-gneisses of the Archaean basement.

The Taborny, Temny and Vysoky deposits are situated in the western part of the Aldan shield, in the southwestern corner of the Uguskiy Graben. The graben is filled with Lower Proterozoic sediments of the Olonnokonskiy Formation, which discordantly overlie early Archaean gneisses and a later Archaean intrusive complex.

Taborny-Temny
Taborny-Temny mineralisation is hosted by the Olonnokonskiy Formation, and in the project area this formation comprises up to 20-30 m of basal conglomerates and gravels, overlain by 300-400 m of fine to medium grained sandstones. The sediments are shallow-dipping to the north, northeast or east. The Olonnokonskiy Formation host rocks have undergone multiple tectonic and magmatic activation events, dominated by deformation and metasomatism associated with the intrusion of Mesozoic dykes and sills. The main Taborny and Temny mineralised zones correspond to fault zones which dip moderately towards the south-southeast. The Taborny and Temny fault zones are regarded as part of the Kondinsky Fault System. The intersection of these two fault zones with a third fault zone, dipping steeply to the southeast, and interpreted as a splay from the Tokkinsky Fault Zone, appears to be a key control on mineralisation at the deposit-scale.

Vysoky
The steeply southeast-dipping fault zone that intersects the Taborny-Temny fault zones continues to the southwest. Vysoky, 1.5 km from Taborny, is located close to the intersection of two branches of this fault zone. As at Taborny-Temny, sandstones and conglomerates of the Olonnokonskiy Formation host mineralisation at Vysoky. Some Vysoky mineralisation is also hosted by syenite sills.

Vrezanny
Vrezanny is within the Tokkinsky Fault Zone, near the eastern edge. The host rocks to mineralisation are granite-gneisses of the Archaean basement. Mineralisation occurs near the intersection of a south-west dipping strand of the Tokkinsky Fault Zone, with an east-west striking fault of the Kondinsky system.

Mineralisation was introduced by potassic metasomatism. Gold is the only element of economic significance, and is strongly correlated with potassium and arsenic. The dominant sulphide mineral appears to have been pyrite. On average, primary sulphide content appears to have been less than 1%; the sulphides have since been oxidised to limonite to a depth of approximately 400 m. The gold is seldom visible, and mainly occurs as micron-scale particles.


Mining Methods

  • Truck & Shovel / Loader


Summary:

Taborny is a low-grade gold deposit of which the production cycle includes conventional drilling, blasting, loading, hauling, dumping of waste and stockpiling of ore. Current mining operations at Taborny are mostly focused on a single open pit, supplemented by production of the adjacent Temny and nearby Vysoky pit. The nearby Vrezanny deposit consists mostly of inferred ore and was not included in the reserves.


Crushing and Grinding
Crusher / Mill TypeModelSizePowerQuantity
Mobile jaw crusher ....................... Subscription required 160 kW 1
Mobile jaw crusher ....................... Subscription required 310 kW 1

Summary:

Historically, a two stage crushing circuit was used to crush the ore to a nominal -40 mm and the ore was agglomerated with cement using a drum agglomerator before stacking. As the project developed, however, testwork showed that the ore was less sensitive to crush size than was initially thought, and so as production was expanded, the crushing circuit was simplified to the current -100 mm nominal crush size and agglomeration was discontinued. Further operational experience has shown that omitting crushing completely results in little additional loss in recovery.

Ore designated for crushing is crushed to a nominal -100 mm using two mobile crushers operating in parallel. Both crushers are based on Metso/Nordberg C120 jaw crushers; one unit is a Nordberg NW120 and the other is a Lokotrack LT120. The Nordberg unit is powered by a 160 kW electric motor and is fitted with a 90 mm scalping screen. The Lokotrack unit is powered by a 310 diesel generator and is fitted with a 75 mm scalping screen. Both crushers operate in open circuit.


Processing

  • Calcining
  • Smelting
  • Heap leach
  • Elution
  • Carbon adsorption-desorption-recovery (ADR)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Source: Subscription required

Summary:

The Taborny process plant treats low grade non-refractory sandstone hosted gold ore by heap leaching to produce gold doré on site.

The plant commenced production in 2002 and has been upgraded in several stages, with expansion of the metal recovery circuit and simplification of the feed preparation circuit. The nominal design capacity of the plant is now 7 Mtpa based on a high proportion of direct dumped ore.

Heap Leaching
The crushed ore is transported to the leach pads using a series of overland conveyors, feeding onto mobile grasshopper conveyors and final to a radial stacker. Direct dumped ore is delivered to the pads by the mine haul trucks. The maximum lift height is 12 m. Leach solution is applied using wobbler sprinklers during the warmer months and drip emitters, which are buried just under the surface of the heaps, in the colder months. Due to the prevailing climatic conditions, the barren and pregnant solutions are stored in tanks inside the elution ........

Recoveries & Grades:

CommodityParameter20192018201720162015
Gold Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Head Grade, g/t 0.520.730.670.70.69
Subscription required - Subscription is required.

Production:

CommodityProductUnits20192018201720162015
Gold Metal in doré koz  ......  Subscription required1006780
Gold Payable metal koz 84
Subscription required - Subscription is required.

Operational Metrics:

Metrics20192018201720162015
Total tonnes mined  ......  Subscription required17,288 kt14,210 kt
Ore tonnes mined  ......  Subscription required5,224 kt3,051 kt5,163 kt4,703 kt
Waste  ......  Subscription required12,065 kt11,159 kt
Stripping / waste ratio  ......  Subscription required2.31 3.66 2.64 2.61
Tonnes processed  ......  Subscription required5,622 kt2,610 kt4,742 kt4,211 kt
Subscription required - Subscription is required.

Reserves at December 31, 2017:

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven Total 8,362 kt Gold 0.57 g/t 153 koz
Probable Total 58,383 kt Gold 0.67 g/t 1,260 koz
Proven & Probable Total 66,745 kt Gold 0.66 g/t 1,413 koz
Measured Stockpiles 3,695 kt Gold 0.28 g/t 34 koz
Measured In-Situ (OP) 4,390 kt Gold 0.86 g/t 122 koz
Indicated In-Situ (OP) 70,216 kt Gold 0.71 g/t 1,609 koz
Measured & Indicated Total 78,301 kt Gold 0.73 g/t 1,764 koz
Inferred In-Situ (OP) 33,104 kt Gold 0.39 g/t 415 koz
Total Resource Total 111,405 kt Gold 0.63 g/t 2,179 koz

Commodity Production Costs:

CommodityUnits20192018201720162015
Total cash costs Gold USD  ......  Subscription required 498 / oz 657 / oz 481 / oz 553 / oz
All-in sustaining costs (AISC) Gold USD  ......  Subscription required 634 / oz 899 / oz 657 / oz 641 / oz
Subscription required - Subscription is required.

Operating Costs:

Units2019201820172016
Processing costs ($/t milled) USD 2.622.542.452.03

Financials:

Units20192018201720162015
Capital expenditures M USD  ......  Subscription required146.3  159.8   56.7   8.5  
Revenue M USD  ......  Subscription required124.51  87.5   103.2   96.2  
EBITDA M USD  ......  Subscription required78.9  40.7   63.1   49  
Operating Cash Flow M USD 55.1   52.8  
Subscription required - Subscription is required


Heavy Mobile Equipment as of March 1, 2021:
HME TypeModelSize
Loader ....................... Subscription required 12 m
Truck (dump) ....................... Subscription required 90 t
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Mar 27, 2021
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required 2017
Subscription required 2016
Subscription required 2015

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
Annual Report 2018
Press Release 2018
Annual Report 2017
Press Release 2017
Corporate Presentation 2016
Integrated Report 2016
Corporate Presentation 2015
Other 2012
Subscription required - Subscription is required.

Aerial view:

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