Secondary risks have even more complex origins and their impacts may last forever. Ore containing gold and silver is crushed as a result of which all elements (or metal and non metal compounds) in the ore are separated. This substance is processed with water and cyanide mixture, and as a result of chemical reaction the gold is separated. However the reaction takes place not only between cyanide and gold but also between cyanide and other elements in the ore, including heavy metals, as a result of which nitrates and other chemical compounds are formed.
http://hetq.am/eng/news/73546/responsible-plunder-of-nature-problems-concealed-by-lydian-intl-regarding-exploitation-of-armenias-amulsar-mine.html
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