Ore Resources (ASX:OR3) began exploration and development activities at its Coolgardie gold projects in Western Australia, according to a Tuesday Australian bourse filing.

Reverse circulation drilling restarted at the Miriam gold project in late October, targeting extensions to the emerging gold system at the flagship Forrest prospect and follow-up drill testing of the Burbanks Monarch prospect.

Regional exploration is set to begin at the Avoca gold project, with initial air core drilling scheduled to begin in mid-October.

Its shares fell 3% in recent trading on Tuesday.