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Australia
Ngungaju (Altura Lithium) Mine (Pilgangoora Operation)

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 Location:
83 km S from Port Hedland, Western Australia, Australia

  Regional Office:
Level 2, 88 Colin Street
P.O. Box 884
West Perth
Western Australia, Australia
6005
Phone  ...  Subscription required
Fax+61-8-6266-6288
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
  • Lithium
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life24 years (as of Jan 1, 2019)
Pilbara Minerals commenced a staged recommissioning of the Ngungaju Plant during FY2022, with first concentrate
produced from the coarse ore circuit in October 2021.

Successful commissioning of both the coarse and fines circuit of the Ngungaju Plant, with the plant in ramp up and expected to achieve name plate production capacity of 180-200ktpa of spodumene concentrate during the September Quarter 2022.


Owners

Source: p. 6,99,100
CompanyInterestOwnership
Pilbara Minerals Ltd. 100 % Indirect
Ngungaju Lithium Operations Pty Ltd(Formerly Altura Lithium Operations Pty Ltd) was acquired effective 20 January 2021.

Contractors

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Deposit Type

  • Pegmatite


Summary:

Altura’s Pilgangoora Lithium Project occurs at the southern end of a zone of pegmatite intrusive dykes within the synformal Pilgangoora greenstone belt. The pegmatites are hosted within amphibolites which have a mafic and ultramafic volcanic origin. A total of 13 mineralised pegmatites have been identified and these occur as a set of stacked lodes generally striking 010 030oNNE and dipping 25-40oESE. The dykes generally range from 8-14m thick however there are areas where the pegmatites form lenticular pods and are much thicker (up to 64m).

Based upon the completed drilling, the pegmatites appear to be confined to a NNE trending corridor which is approximately 1600 metres long (north to south), 550 metres wide (east to west) and 450m deep. Mineralisation is present at surface for some lodes with most mineralised lodes starting from within 10m of surface.

The mineralised pegmatites are located approximately 1km east of a granite contact. There are several barren pegmatites located in the zone between the granite contact and the mineralised pegmatite zone. The granite contact and barren pegmatites were identified via sterilisation drilling carried out for the proposed infrastructure and waste dump areas.

The reason for this structural and or geological control within the deposit area is not fully understood however the distance from the granite contact is such that mineralisation in the pegmatite is confined to lithium and rubidium (almost wholl ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Mining will be undertaken by conventional bulk mining methods utilising EX2500 hydraulic excavators, CAT785 dump trucks and drill and blast delivering ore to a ROM stockpile. Ore will be trucked directly from the blasted faces to the ROM stockpile and fed to the primary crusher using a Front-End Loader (FEL). There has been allowance made for blending from the ROM and external stockpiles. The mining operation is 12-hour shifts with crews working day shift and night shift once Stage 2 operations begin to ramp up.

The pits will be mined using 3m flitches for ore and waste. This height gives reasonable production efficiency while keeping dilution to a minimum. In waste, the flitch height could be increased to improve efficiency within the limits of the equipment size.

Pit Design Parameters:
- Bench Height - 6 m;
- Batter Angle - 75 Degrees;
- Stack Height - 12 m;
- Stack Berm Width - 10 m;
- Inter-ramp Angle (IRA) - 42.25 Degrees;
- Geotechnical Catch berm interval - 80 m;
- Catchment Berm Width - 15 m;
- Ramp Width - 24 m.

All haul roads used by mine equipment need to accommodate a Caterpillar 785, 130t dump trucks. The main ramps with an overall width of 3.5-4 times the truck width using a 10% gradient. This allows for safe passing of trucks inclusive of wall side drainage and pit side bunding. For the benches at the pit bottom (up to 40 metres overall height), a single lane ramp running width of 2.0 ti ........


Crushing and Grinding
Source: Subscription required

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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityUnits202220202019
Spodumene kt  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as concentrate.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202220202019
Annual processing capacity  ......  Subscription required
Total tonnes mined  ......  Subscription required  ......  Subscription required2,549,544 bcm
Ore tonnes mined  ......  Subscription required  ......  Subscription required1,517,284 wmt
Waste  ......  Subscription required  ......  Subscription required5,976,826 wmt
Stripping / waste ratio  ......  Subscription required  ......  Subscription required3.9
Annual production capacity  ......  Subscription required  ......  Subscription required220,000 t of spodumene concentrate
Tonnes processed  ......  Subscription required  ......  Subscription required944,052 wmt
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Reserves at June 30, 2019:
Mineral resource and ore reserve estimate at 0.30% Li2O cut-off grade.
A revised Mineral Resource and Ore Reserve Estimate for the Pilgangoora Altura Lithium Project whilst being prepared as a matter of routine business, was not released in 2020 due to the events initiated in late October 2020.

CategoryTonnage CommodityGradeContained Metal
Proven 7.2 Mt Li2O 1.22 % 87,000 t
Proven 7.2 Mt Fe2O3 1.4 %
Probable 30.5 Mt Li2O 1.05 % 320,000 t
Probable 30.5 Mt Fe2O3 1.29 %
Proven & Probable 37.6 Mt Li2O 1.08 % 407,000 t
Proven & Probable 37.6 Mt Fe2O3 1.31 %
Measured 7.4 Mt Li2O 1.23 % 91,000 t
Measured 7.4 Mt Fe2O3 1.38 %
Indicated 34.2 Mt Li2O 1.03 % 353,000 t
Indicated 34.2 Mt Fe2O3 1.29 %
Measured & Indicated 41.6 Mt Li2O 1.07 % 444,000 t
Measured & Indicated 41.6 Mt Fe2O3 1.31 %
Inferred 4.1 Mt Li2O 0.95 % 39,000 t
Inferred 4.1 Mt Fe2O3 1.41 %
Total Resource 45.7 Mt Li2O 1.06 % 483,000 t
Total Resource 45.7 Mt Fe2O3 1.32 %

Commodity Production Costs:

Commodity2020
C1 cash costs Spodumene  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units20202019
Revenue M AUD  ......  Subscription required  ......  Subscription required
Gross profit M AUD  ......  Subscription required  ......  Subscription required
Pre-tax Income M AUD  ......  Subscription required  ......  Subscription required
After-tax Income M AUD  ......  Subscription required  ......  Subscription required
Operating Cash Flow M AUD  ......  Subscription required  ......  Subscription required



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 16, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 16, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 16, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 16, 2022
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Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Corporate Presentation 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
Annual Report 2018
Feasibility Study Report 2018
Press Release 2017
Feasibility Study Report 2016
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