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).
Copper age started with the discovery of copper in 9000BC and ended with the start of Bronze Age between 3700-3000 BC. The largest single piece of copper ever found, weighed more than 520 tons. Most of the metals are silver or grey in color. Copper is one of very few that is not. Others being gold, cesium and osmium which is blue in color. âChuquiâ in Chile is the largest open-pit copper mine in the world. With a depth of 850 meters, it the second deepest open-pit copper mines in the world.