The plan is to drill approximately 2,000 metres of diamond core in 3 to 4 drill holes adjacent to the previous results in order to expand the footprint of mineralisation and test areas.
Drilling will be carried out by Serbian contractor Drillex International.
Peter Mullens, Tethyan’s chief executive, said there was a full program planned for 2017 at the Serbian properties of Suva Ruda and Gokcinica.
This includes drilling, IP Geophysics, surface mapping and geochemistry and reflects the fact this area of Serbia is developing into a new porphyry epithermal field with the potential to make a major discovery.
First assay results from the drill programme are anticipated in late June and Tethyan to build on decent grades in earlier exploration.
Shares eased 4% to 4.08p.