Century Mine was a large

open cut Open-pit mining, also known as open-cast or open-cut mining and in larger contexts mega-mining, is a surface mining technique of extracting rock or minerals from the earth from an open-air pit, sometimes known as a borrow. This form of mining ...

zinc Zinc is a chemical element with the symbol Zn and atomic number 30. Zinc is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodi ...

lead Lead is a chemical element with the symbol Pb (from the Latin ) and atomic number 82. It is a heavy metal that is denser than most common materials. Lead is soft and malleable, and also has a relatively low melting point. When freshly cu ...

and

silver Silver is a chemical element with the Symbol (chemistry), symbol Ag (from the Latin ', derived from the Proto-Indo-European wikt:Reconstruction:Proto-Indo-European/h₂erǵ-, ''h₂erǵ'': "shiny" or "white") and atomic number 47. A soft, whi ...

mine at Lawn Hill, northwest of

Mount Isa Mount Isa ( ) is a city in the Gulf Country region of Queensland, Australia. It came into existence because of the vast mineral deposits found in the area. Mount Isa Mines (MIM) is one of the most productive single mines in world history, bas ...

North West Queensland The Gulf Country is the region of woodland and savanna grassland surrounding the Gulf of Carpentaria in north western Queensland and eastern Northern Territory on the north coast of Australia. The region is also called the Gulf Savannah. It ...

, Australia. It was Australia's largest open pit zinc mine. Discovered by CRA Limited, mining was initiated by

Pasminco Pasminco was an Australian mining company founded in 1988. It was placed in voluntary administration in September 2001 with its assets sold in stages until 2004 when the remaining assets were spun-off to Zinifex. History Pasminco was establish ...

, continued by

Zinifex Zinifex was an Australian company that operated lead and zinc mines, refineries and a lead smelter. It was established in April 2004, when the assets of Pasminco were spun-off. In 2008 it merged with Oxiana to form OZ Minerals. History In ...

, then OZ Minerals and then

MMG Limited MMG Limited is a mid-tier global resources company that mines, explores and develops base metal projects around the world. MMG's largest shareholder is China Minmetals with 68%.New Century Resources whose primary business is tailings reprocessing.

History

The Century zinc deposit was discovered by CRA Limited in 1990 on

Waanyi The Waanyi people, also spelt Wanyi, Wanji, or Waanji, are an Aboriginal Australian people from south of the Gulf of Carpentaria in Queensland and the Northern Territory. Language The Waanyi language, although earlier thought to be extinct, wa ...

land. Development of the mine commenced in 1997. The mine began open-pit production in 1999. Open-pit mining was completed at Century in August 2015, with final processing of Century-sourced ore occurring in November 2015. The last ore to be processed at Century was 450,000 tonnes that had been mined as part of the Dugald River mine's stoping trial, and then trucked to Century. The processing of this ore was completed in January 2016. The final shipment of zinc concentrate was exported from

Karumba Karumba is a town and a coastal Suburbs and localities (Australia), locality in the Shire of Carpentaria, Queensland, Australia. In the , the locality of Karumba had a population of 531 people. Geography Karumba is in the Gulf Country region o ...

in late January 2016. During its 16 years of operation, Century was one of the largest zinc mines in the world, producing and processing an average of 475,000 tpa of zinc concentrate and 50,000 tpa of lead concentrate. Mill tailings generated from 16 years of operations from the Century open pit forms a Proven Reserve of 77.3 million tonnes at 3.1% zinc-equivalent, for 2,287,000 tonnes of contained zinc. New Century Resources, an Australian base metals development company, restarted Century Mine operations from August 2018 extracting zinc from the tailings.

Operations

Zinc and lead concentrates are exported via the port at

on the

Gulf of Carpentaria The Gulf of Carpentaria (, ) is a large, shallow sea enclosed on three sides by northern Australia and bounded on the north by the eastern Arafura Sea (the body of water that lies between Australia and New Guinea). The northern boundary is ...

. The zinc ore is especially prized because of its low iron content, producing a high quality clean zinc concentrate that is keenly sought by the world's zinc smelters. The concentrate is mixed with water and transported to the port by a pipeline.

References

North West Queensland Surface mines in Australia Zinc mines in Queensland Lead mines in Queensland 1997 establishments in Australia 2016 disestablishments in Australia {{Queensland-geo-stub

History

Operations

See also

References