The appointment coincides with news that AIM-listed Avocet Mining, which produces gold in Tajikistan, Malaysia and Indonesia, has also appointed Buchanan as its UK financial adviser. The agency has replaced 4C Communications.
Director Bobby Morse heads both accounts for Buchanan, which also works for European Goldfields.
Buchanan has recruited ArmorGroup comms manager Nick Melson to be an account manager.
Melson has been replaced at the security specialist by the more senior Patrick Toyne-Sewell, who joined from Citigate Dewe Rogerson as comms director this week (PRWeek, 16 June).