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Russia
Taborny (Neryungri) Mine

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 Location:
126 km NE from Chara, Russia

  Regional Office:
Republic of Sakha (Yakutia), Neryungri town. Hani pgt. 70 years of October, d. 3, kv. 55
Russia
678976
Phone  ...  Subscription required
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Processing
  • Heap leach
  • Carbon in column (CIC)
  • Elution
  • Carbon adsorption-desorption-recovery (ADR)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
Mine Life7.5 years (as of Jan 1, 2016)


Owners

Source: p. 128, 130
CompanyInterestOwnership
Nord Gold N.V. 100 % Indirect
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


Summary:

The Tabornoe deposit is hosted by a potassic metasomatite zone, developed in the sandstones, which strikes EW and dips to the south, parallel to the orientation of the thrust zone.

The principal tectonic features in the area consist of a set of N-S striking, steeply dipping faults a NE – SW striking and steeply dipping shear zone and a shallow thrust of E-W strike, dipping to the south at 20-30°; gold mineralisation is believed to be directly related to the latter.

The Tabornoe deposit is hosted by early Proterozoic sandstones of the Olonnokonskiy Formation. The sandstones are massive, fine to medium grained, and of quartz-feldspar and feldspar-quartz composition. The sandstones are horizontal or shallow dipping to the north, northeast and east, typically at dips of 10 30°.

The Tabornoe orebody is located within a northeast striking shear zone, the associated discontinuities form natural west and east boundaries to Ore Zone 1. The wedge zone between the discontinuites is broken by a system of east-west and northeast striking upthrows, dipping to the south at 70° and thrusts, dipping at 10-35°, also to the south.

Three main lithologies have been identified at the deposit: sandstones, syenite porphyry dyke and metasomatites.

Four stages of alteration have been identified in the open pit, ranging from fresh sandstone to limonite-quartzpotassium feldspar metasomatites in which the original structure cannot be distinguished. Altered sandstones and metasomatites contain mono- or polymineralic veinlets of quartz, potassium feldspar and clinozoisite, 0.1 to 0.8mm in thickness, and also contain very finely disseminated molybdenite, oxidised pyrite crystals, possibly other sulphide minerals, dendritic pyrolusite and very rare free gold.

Tabornoe comprises a complex set of orebodies occurring in altered sandstone and syenite porphyry dyke. Gold bearing mineralisation occurs in all altered rocks types, notably including the syenite porphyry dyke.


Mining Methods

  • Truck & Shovel / Loader


Summary:

Nordgold’s open pit operations use conventional surface mining methods involving drilling and blasting, followed by a load and haul process allowing for selective mining of the ore.


Crushing and Grinding


Processing

  • Heap leach
  • Carbon in column (CIC)
  • Elution
  • Carbon adsorption-desorption-recovery (ADR)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Source: Subscription required

Summary:

Ore is processed by conventional 2-stage crushing and stacking, or dump leaching. Operations at Neryungri utilise the simplest heap-leaching extraction method available, owing to the highly oxidised low-grade ore. Gold is adsorbed from pregnant leach solution in carbon in solution columns, followed by desorption, electro-winning and smelting to produce gold doré. Production at the mine is subject to significant seasonal variations due to harsh winter temperatures. The majority of the crushing and stockpiling of ore occurs from May to September each year, and the majority of gold production occurs from July to December, as the cyanide spray used in heap leaching cannot penetrate the frozen ore.

Ore from the pit is then transported to a designated stockpile and fed into a crushing circuit. The sized ore is then conveyed to a Heap Leach Facility.

The ore is heaped on a clay lined leach pad where it is irrigated with the sodium cyanide leach solution. The solution per ........

Recoveries & Grades:

CommodityParameter20162015
Gold Recovery Rate, %  ......  Subscription required  ......  Subscription required
Gold Head Grade, g/t 0.70.69
Subscription required - Subscription is required.

Production:

CommodityUnits20192018201720162015
Gold koz  ......  Subscription required  ......  Subscription required678084
All production numbers are expressed as payable metal.
Subscription required - Subscription is required.

Operational Metrics:

Metrics20162015
Ore tonnes mined 5,163 kt4,703 kt
Stripping / waste ratio 2.64 2.61
Tonnes processed 4,742 kt4,211 kt

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  ......  Subscription required 657 / oz 481 / oz 553 / oz
All-in sustaining costs (AISC) Gold USD  ......  Subscription required  ......  Subscription required 899 / oz 657 / oz 641 / oz
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Financials:

Units20192018201720162015
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 8.5  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 96.2  
EBITDA M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 49  
Operating Cash Flow M USD  ......  Subscription required 52.8  
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Heavy Mobile Equipment:

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Staff:

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

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
................................... Subscription required 2018
................................... Subscription required 2018
Annual Report 2017
Press Release 2017
Corporate Presentation 2016
Integrated Report 2016
Corporate Presentation 2015
Other 2012
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Aerial view:

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