History and Location

Few other mines have a location quite like our Northern Territory manganese mine, on the island of Groote Eylandt, next to the pristine waters of the Gulf of Carpentaria in Australia’s north.

We have a long history on Groote Eylandt, with mining starting here more than half a century ago and a processing plant commissioned on the island not long after. Since then the plant has gone through several expansions, with the most recent one completed in 2013.

Below ground

GEMCO is an open-cut mining operation, producing high-grade manganese ore that is shipped to our Tasmanian manganese alloy plant and around the world.

It is currently the largest and lowest-cost manganese ore producer in the world, which we hold a 60 per cent share in, with Anglo America Plc holding the remaining 40 per cent.  


Supporting Indigenous communities

We're helping to provide a better quality of life for Indigenous Australians and their families living with Machado Joseph Disease.

See case study

Playing our part

Groote Eylandt is home to the Anindilyakwa people, who are the traditional owners of the land. We have aligned our community investments with the Traditional Owners, working to improve opportunities for local people.  

Education is a priority for people on the island so we are partnering with the Graham Polly Farmer Foundation to support school-aged children on Groote Eylandt to improve their literacy and numeracy skills.

The health of local people is also a major concern, with the genetic, neurodegerative disease Machado Joseph Disease (MJD) predicted to have some of the highest rates of people living with the disease on Groote Eylandt, than anywhere else in the world.

We have supported the MJD Foundation to improve quality of life for Indigenous Australians living with the disease. This has included new equipment and services like physiotherapy delivered ‘On Country’, aimed at slowing the disease’s progression.

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Kicking goals in the community

Patrick Dangerfield joins us to support the Community Football Day.

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Championing diversity and inclusion

Dr Michael Kimmel joined us to discuss diversity goals

Read more
Supporting sustainable tourism

Supporting Groote Eylandt tourism through a fishing sponsorship.

Read more
Easing the impact of MJD

We have a long-standing relationship with the MJD Foundation.

Read more


Get in touch with GEMCO

Jo-Anne Scarini
Jo-Anne Scarini

Jo-Anne Scarini, Vice President Operations

Jo-Anne has extensive experience in the resources industry, having held several senior roles at Rio Tinto, including General Manager at the Bengalla open cut coal mine in New South Wales, General Manager of the Weipa bauxite operation in Northern Queensland, and Project Director in the Northern Territory. Jo-Anne has considerable project management experience, which has involved extensive engagement with the Northern Territory Government and with Indigenous groups in the Northern Territory and Queensland.

Liam Stower, Corporate Affairs

Rowell Highway, Alyangula  
Groote Eylandt, 0885 
Northern Territory 
Phone: 1800 870 766

Email: [email protected]