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Many minerals have been found in the Sangerhausen district of Saxony-Anhalt , which produced 619,200 tonnes of copper and 3,102 tonnes of silver as of 2012 , with 860,000 ; respectively 4,650 tonnes as remaining proven reserves .
 Sangerhausen, Saxony-Anhalt
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Answer:
 Sangerhausen, Saxony-Anhalt