The government aims to issue a new mining permit for Grasberg - which requires the environmental permit issues to be settled - before the end of the year.
Palmer is a volcanogenic massive sulphide-sulphate joint venture project between Constantine and Dowa Metals and Mining, Constantine owns 51% of the project and is its operator.
Most ore will be sourced locally from various locations including the northwestern states of Zamfara, Kebbi and Kaduna, as well as the central states of Kwara and Niger.
The punishment from the OSC is a response to false accounting from Katanga that saw it overstate how much it mined in the Democratic Republic of Congo in 2014.
