CuFe (ASX:CUF) is set to start a reverse circulation and diamond drilling campaign at the Tennant Creek project in the Northern Territory, with earthworks and drill pad preparation underway, according to a Thursday filing with the Australian bourse.

The campaign includes resource development drilling to advance the Orlando and Gecko resources closer to development and green fields exploration at targets along the Gecko Corridor, the filing said.

Shares fell 4% in morning trade Thursday.