Goro mine

Goro is one of the largest nickel reserves in New Caledonia, which produces 25% of world nickel reserves. Goro has estimated reserves of 370 million tonnes of ore grading 1.6% nickel.[2] The 370 million tonnes of ore contains 5.92 million tonnes of nickel metal.[2]

The Goro mine is targeted to produce about 40,000 tonnes of nickel per year, and also some cobalt from saprolite deposits. It was designed by the Canadian company Inco, and completed by the Brazilian company Vale after it purchased Inco.[3] Ore comes from a huge open cut mine on the Plaine des Lacs. Nickel and cobalt are delivered by conveyor to Prony Bay. The processed high grade Nickel Oxide is then shipped to Vale's refinery in Dalian, China. Vale have a 69% share and a joint company called Sumic Nickel Netherlands, Japan's Sumitomo Metal Mining Co. Ltd., and Mitsui Co. Ltd., hold a 21% share. The three provinces of New Caledonia hold the remaining 10%. [a sale of the operation is in process, 2020, changing these percentages if it goes through]

The US$6 billion mine and nickel processing plant has had a chequered history.[3] It is in a remote location with an indigenous Kanak population who were largely engaged in fishing and agriculture, with limited mining, prior to the plant. It was opposed by many of the indigenous residents for some years, led by the Rheebu Nuu committee, and sabotage at the construction site caused significant delays. Rheebu Nuu used the Declaration of 2002 and the United Nations Declaration on the Rights of Indigenous Peoples of 2007 in order to claim land rights (as material and immaterial property) and compensation payments. A turnaround in negotiations occurred in 2008. Rheebu Nuu and Vale signed a “Pact for Sustainable Development of the Big South” in March 2008 that managed the question of royalties. Rheebu Nuu then stopped legal measures against Vale Inco and accepted a discharging of highly dilute acid in the southern Caledonian lagoon. The project was always supported by the mining friendly Southern Province.

The plant uses a high-pressure-acid-leach (HPAL) technology, deemed expensive and prone to problems. It opened in 2010 after substantial delays and an acid spill in April of that year. Sulfuric acid is made and stored on site to leach nickel out of the ores; waste material is stored and clean effluent is emitted through a long pipe into the sea. In 2012 the whole facility was out of action for six months following spills. Environmental groups and local people feared effluent emissions could damage the fragile lagoon system offshore, vital for local livelihoods and also a UNESCO World Heritage site. Their fears were again confirmed in May 2014 when 100,000 litres of effluent ended up in a creek. At this time the plant was shut down after arson attacks by local Melanesian youths, causing $20–30 million of damage. A joint mission by the provincial government and the environmental authority are investigating the extent of pollution and plant performance.[4]

On 2016, a loan from the French Government was stablished to help the mine overcome their sustained losses since its opening.[5] Vale announced its desire to sell the operation to New Century Mining in June 2020,[6] but the company was unable generate the required funding for the acquisition, and its board elected not to pursue the acquisition.[7]