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Australia
Mt. Holland Mine

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 Location:
368 km E from Perth, Western Australia, Australia

  Regional Office:
L3, 109 St Georges Tce
Perth
Western Australia, Australia
6000
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WebsiteWeb
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  • Geology
  • Mining
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  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Lithium
  • Spodumene
Mining Method
  • Truck & Shovel / Loader
Mine Life50 years (as of Jan 1, 2022)
The Mt Holland lithium project is a Earl Grey mine, concentrator and refinery to produce lithium hydroxide.

In December 2022, the first lithium ore was mined at Mt Holland. This first ore was crushed in May 2023, and spodumene concentrate production is expected to commence late 2023, for sale in the 2024 financial year. Good progress was made on construction of the Kwinana refinery to start producing lithium hydroxide by the first semester of 2025.

To capitalise on the high demand for lithium, Covalent Lithium is undertaking a feasibility study to double the production capacity at the Mt Holland mine and concentrator.


Owners

Source: p. 100
CompanyInterestOwnership
Wesfarmers Ltd. 50 % Indirect
Sociedad Quimica y Minera de Chile S.A. 50 % Indirect
Covalent Lithium Pty Ltd (operator) 100 % Direct
The Mt. Holland project is a joint venture, in which SQM owns 50% and Wesfarmers Limited owns the remaining 50% (the “Mt. Holland JV”).

The Mt. Holland Project is managed by Covalent Lithium Pty Ltd (Covalent), an entity that is jointly owned by the joint venturers, as agent for and on behalf of the Joint Venture.

Contractors

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Deposit Type

  • Pegmatite


Summary:

The Mt. Holland project is focused on the exploitation of the resource in the Earl Grey pegmatite group. The Earl Grey pegmatite group consists of a main tabular pegmatite body flanked by numerous narrower hanging wall and footwall apophyses. The pegmatite has a strike length of at least 1 km, and a dip extent of over 2 kilometers and a thickness of up to 100 meters.

Deposit Types and Mineralization
The Earl Grey pegmatite group consists of a simple albite-quartz-microcline-spodumene petalite dominated assemblage with minor biotite, muscovite, and tourmaline (Covalent, 2020). The lithium aluminosilicates spodumene and petalite are by far the most abundant lithium-bearing minerals in the Earl Grey pegmatite; however, a wide array of trace lithium phases has also been documented in distinct domains. These are mostly late-stage alteration related phases, and except for cookeite, are a rare occurrence. Textures range from extremely coarse pegmatite through to finer grained seriate granitic to aplitic and late-stage replacement textures. The Earl Grey pegmatite group does not display the strong concentric mineralogical zonation commonly associated with complex rare element pegmatites.

Bedrock Geology
The Earl Grey pegmatite is hosted within the north-south trending amphibolite facies volcano sedimentary stratigraphy of the mideastern ultramafic belt. The stratigraphic succession broadly progresses up-dip towards the west, although potential repeti ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Mining of the Earl Grey Deposit at Mount Holland will utilize conventional open pit mining methods. The mine plan gives a Life of Mine of approximately 50 years at a production rate of around 2 Mt/year of ore, with a total material movement 511 Mt (including waste material). The operation will be serviced by contractor-owned and operated drill & blast, as well as load & haul equipment. Mining equipment will include excavators, haul trucks, drilling rigs and ancillary equipment including dozers, water trucks, service trucks and graders.

Material movement initiated in February 2022 by removal and stockpiling of topsoil, followed by pre-stripping of waste to provide access to the first ore.

The deposit geometry presents relatively large bulk areas of both ore and waste; however, the ore/waste contact is designed to be mined as cleanly as possible to prevent ore loss and dilution of the ore with the high Fe2O3 waste. It is anticipated that precision drill and blast techniques will be employed on these ore/waste contacts, with dozers cutting to visual ore/waste contacts. Based on ore grade, excavated material will be hauled from the pit to specific locations, as follows:
· Ore which meets or surpasses the Li2O cutoff grade (high-grade ore) will be hauled to the ROM pad.
· Ore below the Li2O grade blending specifications, will be moved to the low-grade ore stockpile.
· Mixed material, derived from the ore/waste contact zone will be stored at ........


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnitsAvg. Annual (Projected)LOM (Projected)
Lithium kt 502,370
All production numbers are expressed as hydroxide.


Reserves at December 15, 2021:
Mineral Reserves and Resources are reported above this 0.5% Li2O cut-off grade.

CategoryTonnage CommodityGrade
Proven 21.5 Mt Li2O 1.48 %
Proven 21.5 Mt Fe2O3 1.36 %
Probable 62.4 Mt Li2O 1.6 %
Probable 62.4 Mt Fe2O3 1.19 %
Proven & Probable 83.9 Mt Li2O 1.57 %
Proven & Probable 83.9 Mt Fe2O3 1.24 %
Measured 27,000 kt Li2O 1.58 %
Measured 27,000 kt Fe2O3 1.05 %
Indicated 61,000 kt Li2O 1.45 %
Indicated 61,000 kt Fe2O3 1.04 %
Measured & Indicated 88,000 kt Li2O 1.49 %
Measured & Indicated 88,000 kt Fe2O3 1.04 %
Inferred 7,000 kt Li2O 1.38 %
Inferred 7,000 kt Fe2O3 1.35 %
Total Resource 95,000 kt Li2O 1.48 %
Total Resource 95,000 kt Fe2O3 1.06 %


Pipelines and Water Supply
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Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 25, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 16, 2023
....................... Subscription required ....................... Subscription required Subscription required Sep 16, 2023
....................... Subscription required ....................... Subscription required Subscription required Sep 16, 2023
....................... Subscription required ....................... Subscription required Subscription required Sep 16, 2023
....................... Subscription required ....................... Subscription required Subscription required Sep 16, 2023
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Annual Report 2023
Annual Report 2022
Corporate Presentation 2022
Sustainability Report 2022
Technical Report 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
Corporate Presentation 2018
Pre-Feasibility Study Report 2018
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