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005 million t copper in 2000. Up until 1998 Indonesian production came exclusively from the Ertsberg/Grasberg mine (Freeport/Rio Tinto) in Irian Jaya. 334 million t) but since then grades have declined and future production will be less. 245 million t this mine has raised Indonesia’s total production to 1 million t. 634 million t copper in 2000. Copper mining in Canada is divided into three areas: in Manitoba on the so-called ‘Canadian Shield’ surrounding Hudson Bay, in southern Quebec and in British Columbia.

3 million t in 1990, with the incentive of domestic demand which has risen by over 135% since 1994 and is now estimated to stand at over three times the level of mine production. The main areas in which copper is currently mined in China lie on the middle reaches of the Yangtze river in the provinces of Jiangxi, Anhui and Hubei. The Jiangxi Copper Company is the largest primary copper producer in the country and operates to the south of the river some 110 miles east of Nanchang. Its main mine, Dexing, is by far the largest in China, producing some 130000 t per annum copper; it also owns the largest smelting and refining complex situated at Guixi and a refinery at Shanghai.

As mentioned previously, the main factor in determining the distribution of copper mine production is, of course, the location of the ore reserves, particularly those which are more easily accessible and of economic quality. However, a number of other factors influence the capacity of a country to produce copper (the same as for any other metal). First, the types of ore-bodies are important. Porphyry deposits, particularly those found in Chile and the Rocky Mountains, lend themselves to large-scale open pit mining with comparatively low costs.

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Metallurgy Research - Quarterly Prog Rpt [Jan-Mar 1956] [Declassified]


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