1.9 billion year-old ores
2017-05-08 In the Falun mine, copper, zinc, lead and smaller amounts of gold and silver have been mined for at least 800 years until 1992. Since 2001, the mine has been a world heritage site. Now, ore researcher Tobias Kampmann has determined the geological age of the ore body to ca. 1.9 billion years in a dis...