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Australia
Gove Mine

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 Location:
650 km E from Darwin, Northern Territory, Australia

  Address:
1 Melville Bay Road
Nhulunbuy
Northern Territory, Australia
0880
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WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
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  • Production
  • Reserves
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Bauxite
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2030
In 2021, Rio Tinto progressed closure execution work at a number of assets, including the Gove refinery. The refinery demolition is one of the largest in Australia. The Gove closure execution programme will take approximately ten years to complete followed by ongoing monitoring, with mining operations expected to cease no later than 2030.


Owners

Source: p. 328
CompanyInterestOwnership
Rio Tinto plc 100 % Indirect

Contractors

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Deposit Type

  • Bauxite
  • Laterite


Summary:

Bauxite deposits at Gove occur at a latitude slightly more than 12 degrees south of the equator. The bauxite appears to be a weathering product of Cretaceous marine sediments, which overlie Proterozoic basement rocks of the Arnhem Inlier. Uplift, weathering, and erosion of the sediments, as well as formation of the bauxite, took place during the Tertiary, but exact timing and detail of events remains uncertain. Marine reworking of weathered products is likely to have taken place, possibly more than once.

Pisolitic textures are dominant, with variable cementation. However, variably cemented coarser nodule horizons are also common. Some deeper bauxite, as well as underlying laterite, contain abundant interconnected solution cavities, which may have been created geochemically and/or biologically (associated with root channels). Modern day root channel structures and infill, in the upper part of the bauxite, are common. Gibbsite is the major ore mineral, with boehmite being of lesser significance

Bauxite occurs on top of a gently undulating plateau at approximately 30 to 70m above sea level, over an area measuring approximately 20km east-west by 15km north-south as seen in the figure below. The plateau has been variably dissected by erosion into three main plateau areas. Main Plateau is the largest contiguous bauxite area, whilst Rocky Bay and Eldo are two adjacent smaller bauxite areas, figure below. The present day extent of the bauxite likely represents a ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Ore Reserve is mined using a shallow, open cut strip mining technique developed over several decades of operations. Once the area is tree cleared and the topsoil/overburden removed, the bauxite is ripped by dozers before being hauled to the crusher for sizing. Several mining areas are active at any one time to enable blending and to mitigate against operational risk.

As the Ore Reserve is shallow, geotechnical risks are extremely low. Stockpile heights and wet road conditions are managed in accordance with standard operating procedures.

Dilution and mining recovery parameters are applied during the Ore Reserve estimation process, based on reconciliation of past performance and reviewed annually.

Minimum bauxite mining thickness of 0.7 m is used for Ore Reserve estimation.

Inferred Mineral Resources are not considered in the estimation of Ore Reserves.

Apart from maintenance workshops to maintain the mining equipment, stores for consumables and water stands there is no other significant infrastructure required with the mining method.


Crushing and Grinding


Processing

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Summary:

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Production:

CommodityUnits2022202120202019201820172016
Bauxite kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required12,54011,2019,091
All production numbers are expressed as ore.
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Operational Metrics:

Metrics20222021
Annual production capacity  ......  Subscription required  ......  Subscription required
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Reserves at December 31, 2022:
Bauxite Ore Reserves are stated as recoverable Ore Reserves of marketable product after accounting for all mining and processing losses.

CategoryTonnage CommodityGradeRecoverable Metal
Proven Mt Bauxite 55 Mt
Proven Mt Al2O3 50.5 %
Probable Mt Bauxite 0.7 Mt
Probable Mt Al2O3 50.5 %
Proven & Probable Mt Bauxite 56 Mt
Proven & Probable Mt Al2O3 50.5 %
Measured 12 Mt Bauxite
Measured Mt Al2O3 48.1 %
Indicated 0.8 Mt Bauxite
Indicated Mt Al2O3 50 %
Measured & Indicated 13 Mt Bauxite
Measured & Indicated Mt Al2O3 48.3 %
Inferred 0.1 Mt Bauxite
Inferred Mt Al2O3 50.1 %
Total Resource 13 Mt Bauxite
Total Resource Mt Al2O3 48.3 %



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Mar 8, 2023
....................... Subscription required ....................... Subscription required Subscription required Mar 8, 2023
....................... Subscription required ....................... Subscription required Subscription required Mar 8, 2023
....................... Subscription required ....................... Subscription required Subscription required Mar 8, 2023
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Staff:

EmployeesYear
Subscription required 2021

Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
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