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Serbia
Jadar Project

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 Location:
140 km SW from Belgrade, Serbia

  Project Contacts:
4 Gimnazijska Street
Loznica
Serbia
15300
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  • Owners
  • Geology
  • Mining
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  • Production
  • Reserves
  • Personnel
  • Filings & News

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Overview

StatusInactive / Suspended
Mine TypeUnderground
Commodities
  • Lithium
  • Borate
  • Sodium sulphate
  • Li2O
  • B2O3
Mining Method
  • Cut & Fill
  • Bench stoping
Processing
  • Crush & Screen plant
  • Leaching plant / circuit
Mine Life40 years (as of Jan 1, 2021)
Jadarite, LiNaSiB3O7(OH), is a mineral unique to the Jadar deposit that was previously unknown to science.

January 20, 2022 (Source: Reuters) - Serbia revoked Rio Tinto's (RIO.L) lithium exploration licences on Thursday, bowing to protesters who opposed the development of the project by the Anglo-Australian mining giant on environmental grounds.
All decisions (linked to the lithium project) and all licences have been annulled.
Latest NewsSerbia revokes Rio Tinto lithium project licences amid protests     January 20, 2022


Owners

Source: p. 12
CompanyInterestOwnership
Rio Tinto plc Indirect
Rio Sava Exploration d.o.o. (Rio Sava), a fully owned subsidiary of Rio Tinto Energy and Minerals Product Group, is the legal owner of the Jadar Project.

Deposit Type

  • Sedimentary


Summary:

The Jadar deposit, discovered in 2004 in western Serbia, is a concentration of lithium and boron in a mineral new to science named jadarite, LiNaSiB3O7(OH). The deposit is located in a valley with flat-lying farmland covering a surface area of 3.0 km by 2.5km. Known lithium and borate mineralisation lies at depths from 100 m to 720 m below surface.

The mineralization is hosted in a lacustrine sedimentary sequence of Miocene age dominated by calcareous claystones, siltstones, sandstones and clastic rocks (about 400 m to 500 m thick). The sequence dips to the north at between 0 and 25 degrees or more, but typically between 5 and 10 degrees, and it includes several thin tuff beds that provide valuable marker horizons for stratigraphic correlation. Miocene sediments lay unconformable on a basement of Cretaceous age.

The deposit includes three types of mineralization occurring as stratiform lenses of variable thickness, and hosted in gently dipping sequence of mainly fine-grained sediments that is dissected by faults:
o Jadarite LiNaSiB3O7(OH) mineralization, new to science and so far unique to this deposit; occurs within a stratiform sedimentary lacustrine sequence with sub-horizontal beds of jadarite as rounded grains, nodules, or concretions generally in the range 1 mm to 10 mm in a siltstone / mudstone matrix. Jadarite is mainly concentrated in three gently dipping tabular zones known as the Upper, Middle and Lower Jadarite Zones (UJZ, MJZ and LJZ).
o Sodium borates, mainly in the form of Ezcurrite - Na4B10O17·7H2O, but also as Kernite - Na2B4O7·4H2O, and Borax - Na2B4O7·10H2O, occurs as lenses that are interbedded with jadarite-bearing siltstones and mudstones, present mainly enclosed or adjacent to the LJZ with a more restricted areal distribution.
o Gypsum occurs as layers of gypsiferous sandstone mixed with carbonate and crosscut by fibrous selenite gypsum veinlets; it is concentrated in the upper part of the sequence in the transition from lacustrine to brackish conditions (sub economic).

The genesis of the jadarite and borate mineralisation is conceptual at this stage:
o Jadarite and borate beds are thought to have formed at or near the water– sediment interphase in the sediments from hydrothermal fluids entering the basin.
o The jadarite and borate mineralisation has similarities to other deep water borate environments (i.e. Furnace Creek Fm. in US).

Jadarite bearing sediments are affected by sedimentary processes during deposition, including dewatering, sliding, slumping and extensional / compressional fractures associated with these events. Mineralisation is affected by normal and reverse fractures post lithification with limited remobilisation of jadarite and other borate minerals.

Significant mineralogical changes in the vertical are controlled by the geochemical evolution of the basin and mineralising events over time, and by the basin scale graben faulting that constrains the jadarite and NaBo mineralisation.


Mining Methods

  • Cut & Fill
  • Bench stoping


Summary:

The orebody will be extracted using underground mining methods which are variants of cut and fill, and bench stoping. Mining panels were generated on regular grids within each structural zone. Internal to these panels, individual mining stopes and associated development accesses were created for interrogation and scheduling.

The underground mine will be accessed via a twin shaft system located outside the Jadar River floodplain to the southwest of the LJZ. The main production shaft will be 8.5 m diameter and equipped with two 9 t skips capable of hoisting a peak 7,200 t/day of ore and rock waste material.


Crushing and Grinding
Crusher / Mill TypeModelSizePowerQuantity
High Pressure Grinding Rolls (HPGR) 1


Processing

  • Crush & Screen plant
  • Leaching plant / circuit

Source: Subscription required

Summary:

Development of the flowsheet to process the jadarite mineralised material has been accompanied by extensive laboratory testwork and piloting over a period of approximately ten years. The flowsheet incorporates standard unit operations arranged in a manner to suit the unique lithium and boron mineralogy associated with the Jadar resource and consists of three main sections:
1. Comminution and beneficiation to produce a jadarite concentrate.
2. Hydrometallurgical processing of the jadarite concentrate to produce unrefined lithium carbonate, technical grade boric acid and anhydrous sodium sulfate.
3. Bi-carbonation of the unrefined lithium carbonate to produce battery grade lithium carbonate.

Comminution and beneficiation involves a relatively simple circuit, taking advantage of thehardness differential between the hard jadarite particles and the much softer host rock toproduce a 4 mm/+0.2 mm jadarite concentrate, with the -0.2 mm fraction rejected as beneficiati ........


Projected Production:

CommodityProductUnitsAvg. Annual
Lithium Carbonate t 58,000
Borate Acid t  ......  Subscription required
Sodium sulphate Salt t  ......  Subscription required


Reserves at December 10, 2020:

CategoryTonnage CommodityGrade
Probable 16.6 Mt Li2O 1.81 %
Probable 16.6 Mt B2O3 13.4 %
Indicated 55.2 Mt Li2O 1.68 %
Indicated 55.2 Mt B2O3 17.9 %
Inferred 84.1 Mt Li2O 1.84 %
Inferred 84.1 Mt B2O3 12.6 %
Total Resource 139.2 Mt Li2O 1.78 %
Total Resource 139.2 Mt B2O3 14.7 %


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 6, 2021
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Subscription required - Subscription is required.

News:

NewsDate
Serbia revokes Rio Tinto lithium project licences amid protests January 20, 2022
Rio Tinto pls.: Town in western Serbia scraps plan for lithium mine project December 16, 2021
Rio Tinto commits funding for Jadar lithium project July 27, 2021
Rio Tinto partners with InoBat to explore innovative lithium battery initiative May 25, 2021
Rio Tinto declares maiden Ore Reserve at Jadar December 9, 2020

Aerial view:

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