Manganese

The Northern Territory is a world leader in production of manganese, with historical production until June 2015 of 105 million tonnes of manganese ore and concentrate.

Production

Annual production in 2014/15 was 5.69 million tonnes, from two operations - the world class Gemco mine on Groote Eylandt (South 32 Ltd), and the Bootu Creek mine north of Tennant Creek (OM Holdings Ltd).

Geology

The Groote Eylandt deposit is one of the world’s largest and highest grade manganese mines, with total resources and reserves of 184 million tonnes of manganese ore grading 42.4% Mn.

Groote Eylandt and associated deposits are Cretaceous - 95 million years old - massive, sheet-like sedimentary manganese ore deposits along the margin of the Carpentaria Basin.

Bootu Creek is hydrothermally enriched sedimentary deposit in the Tomkinson Province which forms part of the greater McArthur Basin. 

Sedimentary manganese deposits are also present in the Amadeus Basin.

Last updated: 13 October 2017