Terramin Australia (ASX:TZN) started about 1,000 meters of exploration drilling at its South Gawler Ranges project, according to a Tuesday filing with the Australian bourse.
Drilling has been insufficient to define a mineral resource and the company remains uncertain if further exploration will lead to one, the filing said.
The drilling activities are expected to be completed by mid-March, the filing added.
Shares of the company fell 3% in recent Tuesday trade.