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Mines et métallurgie (cliquer pour ouvrir le dossier)
Un dossier sur les mines et la métallurgie; mon expérience professionnelle jusqu'en juillet 1996 et après...
Copper; outlook 2011
World mine production of copper was 15.8 million metric tonnes (Mt) in 2009; world reserves are estimated to be 540Mt, 34 years at 2009 rate of production. Twelve countries produced 86% of world production (link). Major sources of copper are found in disseminated form in magmatic rocks near continental plate junctions - principally along the west of the Americas and in central Asia (link). These are porphyry copper orebodies, of very low grade (typically 0.5% Cu or less); these ores are sulphides - the copper bearing minerals are mainly chalcopyrites and bornites.
Published: Mon, 06 Jun 2011 05:30:41 GMT
Updated: Mon, 26 Oct 2015 16:32:07 GMT
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