Answer: SUDBURY, ONTARIO.
Explanation: SUDBURY,is a place in Ontario, Canada known to have been formed as a result of the separation of Sulphur liquid from ultramafic Magma by becoming supersaturated and immiscible. Over 100millions tons of Sulphur liquid and some quantities of other metals like Nickel,iron have been released into the atmosphere as a result of mining activities of that period.
Sudbury basin is famous for its geological feature that hosts about the largest concentrations of nickel-copper sulphides in the world is believed to have been formed by a meteorite impact 1.8 billion years ago.