Mine landscape

Manganese

The Northern Territory is a world leader in manganese production, with the world’s largest and lowest cost manganese mine on Groote Eylandt, and another operating mine at Bootu Creek.
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Total production
129.1 million tonnes of manganese ore and concentrate
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2018/19 production
6.41 million tonnes
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Remaining JORC resources
167 million tonnes of manganese ore
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Value of production in 2018/19
$2.265 billion
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Production ranking in Australia
1st

Manganese is currently the largest contributor to the Territory’s mineral production value.

View the manganese and critical minerals factsheet PDF (1.3 MB)

Mines

For more information visit Groote Eylandt mine

Remaining JORC resource: 157 Mt @ 44.1% Mn

The Groote Eylandt manganese mine has been in operation since 1965, and has produced more than 115 million tonnes of manganese ore and concentrate to June 2018. The mine is operated by the Groote Eylandt Mining Company Pty Ltd (GEMCO), which is majority owned by South 32 Ltd.

The ore is mined by shallow open-cut mining methods and is transported by road to a nearby port. Production in 2017/18 totalled 5.66 Mt of manganese ore. The deposit comprises oolitic and pisolitic sedimentary manganese within the Cretaceous Carpentaria Basin.

For more information visit Bootu Creek mine and OM Maganese.

Remaining resource: 9.95 Mt at 22.4% Mn

The Bootu Creek mine is 110km north of Tennant Creek and commenced operation in 2005. The mine is operated by OM Manganese Ltd, a subsidiary of Singapore-based OM Holdings. In 2018, production of manganese concentrate (lumps and fines) totalled 814,040 t at 35.77% Mn.

A Tailings Retreatment Plant at Bootu Creek is expected to be commissioned in 2019 and will produce ~250,000 tonnes of manganese fines per annum for eight years. The deposit is a hydrothermally modified sedimentary deposit hosted in Palaeoproterozoic rocks of the Tomkinson Province.

Projects

In January 2019, an exploration licence covering part of Winchelsea Island, off the northwest coast of Groote Eylandt, was granted to the Winchelsea Mining Pty Ltd, which is a joint venture between the Anindilyakwa Advancement Aboriginal Corporation (AAAC) and AUS China International Mining.

Further potential for sedimentary hosted manganese occurs in relatively unexplored regions of eastern Arnhem Land, along the western margin of the Carpentaria Basin, where manganese was precipitated during a Cretaceous marine regression on coastal terraces and troughs.

Sedimentary or secondary manganese deposits are also present in the Amadeus Basin (for example, Wangatinya), McArthur Basin (for example, South Rosie Creek), Georgina Basin and South Nicholson Basin.

More information

  • Ferenczi 2001. Iron Ore, Manganese and bauxite deposits of the Northern Territory. NTGS Report 13
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Operating mine

Care and maintenance

Prospect

JORC resource

Under feasibility

In approvals process

Bauxite

Copper

Critical Minerals

Diamond

Gold

Iron

Manganese

Mineral Sands

Phosphate and Potash

Uranium

Zinc, Lead and Silver