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Australia
Leinster Mine (Nickel West Operation)

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 Location:
11 km N from Leinster, Western Australia, Australia

  Address:
25 yakabindie street
Leinster
Western Australia, Australia
6437
Phone  ...  Subscription required
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit / Underground
Commodities
  • Nickel
Mining Method
  • Truck & Shovel / Loader
  • Sub-level caving
Processing
  • Flotation
Mine Life8 years (as of Jan 1, 2020)
Latest NewsBHP Nickel West awards $190m mine contract to Thiess     September 10, 2018


Owners & OPERATOR

Source:
CompanyInterestOwnershipInvestor's Info
Thiess Pty Ltd. (operator)
BHP Group Ltd. 100 % Indirect
BHP Billiton Nickel West Pty Ltd. (operator) 100 % Direct
Thiess provides technical mine services including mine planning, survey and geotechnical engineering and is responsible for ore production and underground development.

Deposit Type

  • Intrusion related


Summary:

BHP Billiton’s Leinster Nickel Operation (LNO) is located 600 km north-east of Perth in the Eastern Goldfields Region of Western Australia. The LNO deposits (known as Perserverance, Rocky’s Reward, Harmony and 11 Mile Well ) are situated within the Wiluna Greenstone Belt and the orebodies are hosted in Komatite Ultramafic lava flows.

Steeply dipping disseminated and massive textured nickel-sulphide mineralisation associated with metamorphosed ultramafic lava flows and intrusions .


Mining Methods

  • Truck & Shovel / Loader
  • Sub-level caving


Summary:

The Perserverance orebody has been mined at surface by open cut and extends underground to a current depth of 1 100 m. The Perserverance underground mine is the only mine currently in operation at Leinster. The main orebody is mined by sub-level caving. Surface operations consist of monitoring the subsidence caused by the underground operation, on the completed open pit and surrounding infrastructure. A programme is currently underway to backfill a portion of the pit with waste material, to slow the rate of subsidence and minimize the effects on nearby ventilation and haulage shafts.

The Rocky’s Reward orebody has been mined by open cut and underground stoping methods. A recent scavenge operation, extracting a portion of the crown pillar was completed in June 2005.

Harmony commenced mining in March 2000. The pit was mined in three stages and included cutbacks due to wall failures.

The 11 Mile Well orebody was mined by open cut methods and was completed in September 2005. Although a small operation (18 month project), localized instability of the walls necessitated a redesign after 6 months.


Crushing and Grinding


Processing

  • Flotation

Source: Subscription required

Summary:

Concentration plant with a nominal capacity 3 Mtpa of ore.

Installing 2 x OK150 tank cells at elevation to minimise pumping costs. Evaluating existing flotation capacity to suit the SSF flowsheet and selecting new duties for the existing cell banks. Extensive flotation floor pump modifications, extensive launder modifications, new samplers and Multi Stream Analyser to provide real time performance data. Minimal tie over time between the old circuit and the new SSF circuit.


Combined production numbers are reported under Nickel West Operation

Operational Metrics:

Metrics202020192018201720162015
Plant annual capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required3 Mt of ore3 Mt of ore
Subscription required - Subscription is required.

Reserves at June 30, 2020:

CategoryOreTypeTonnage CommodityGrade
Proven & Probable Stockpiles 0.89 Mt Nickel 0.75 %
Proven & Probable In-Situ (OP) 5.3 Mt Nickel 0.72 %
Proven & Probable In-Situ (UG) 5.1 Mt Nickel 1.6 %
Measured In-Situ (OP) 3 Mt Nickel 1.1 %
Measured In-Situ (UG) 16 Mt Nickel 2 %
Measured Disseminated 2.4 Mt Nickel 0.69 %
Indicated In-Situ (OP) 8 Mt Nickel 1 %
Indicated In-Situ (UG) 12 Mt Nickel 2 %
Indicated Disseminated 77 Mt Nickel 0.53 %
Inferred In-Situ (OP) 0.7 Mt Nickel 1.2 %
Inferred In-Situ (UG) 4.3 Mt Nickel 1.9 %
Inferred Disseminated 88 Mt Nickel 0.52 %


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 12, 2020
....................... Subscription required ....................... Subscription required Subscription required Oct 10, 2020
....................... Subscription required ....................... Subscription required Subscription required Oct 10, 2020
....................... Subscription required ....................... Subscription required Subscription required Oct 10, 2020
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
................................... Subscription required 2018
Annual Report 2017
Other 2017
Annual Report 2016
Annual Report 2015
Subscription required - Subscription is required.

News:

NewsDate
BHP Nickel West awards $190m mine contract to Thiess September 10, 2018

Aerial view:

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