Volcan said it would suspend its operations in the San Cristobal, Carahuacra and Ticlio mines for up to 30 days as it works on updating an operating permit for its Rumichaca tailings dam.

The company calls this project one of the world’s largest undeveloped copper projects.

The Saudi hub would service the Middle East, North and East Africa regions.

Chile's state-run copper giant announced the departure of temporary vice president Jose Sanhueza on Tuesday.

The Japanese trading house expects to integrate its refined copper business onto the MineHub platform starting with key customers in the Asian market.

Earlier this week, tin prices surged to their highest in seven months.

"The US government needs to stop giving lip service to permitting," Richard Adkerson told Reuters.

Northern Dynasty claims it has spent at least $1 billion over two decades in its efforts to develop the project, which was effectively killed.