Colorado, US silver mine has hit several milestones on its return plans
Test work shows Sparc graphene works well on gold and silver.
Move is part of the company's rapid restart programme for the Bunker Hill mine.
US producer rolling out new extraction, processing technologies
Scotgold has poured first gold at Cononish last December.
Company cited improved economics of zinc market for move.
Expansion expected to maintain current workforce and full production activities until 2033.
DD212 promises a 20% reduction in boom positioning time.
Company has appointed ABH Engineering for work at Bull River.
Work on Las Chispas process plant will begin in February.
AL software can analyse historic geological and geophysical data
VanGold targets "a swift path" to restarting production