Before independence, India was subjugated by the British. This is an example sentence using subjugate.
CALL US NOW: +45 96 90 96 90. Home | Mining | Copper ores. The main copper sulphide minerals are chalcopyrite (CuFeS2) chalcocite (Cu2S), covellite (CuS), bornite (Cu5FeS4), tetrahedrite ((Cu,Fe)12Sb4S13) and enargite (Cu3AsS4). The largest source of copper is from porphyry ore deposits in which one or a combination of the aforementioned minerals occurs. A typical copper sulphide ore contains various levels of iron sulphide types that generally include pyrite (FeS2) and pyrrhotite (Fe1-xS).
1 Pure copper rarely occurs in nature. 2  It is found in minerals such as azurite, malachite and bornite. 3  It is obtained by smelting, leaching or electrolysis. 4  Each year about 6,540,000 tons of copper is mined in the United States, Zaire, Zambia, Canada, Chile, Cyprus, Russia and Australia.