Tethyan Resources PLC (CVE:TETH) told investors it had submitted two composite samples from its Kizevak zinc-lead-silver project in Serbia for metallurgical testing.

The work is aimed at providing preliminary data from which more detailed testing can be designed, and to give a basic indication of the grade-recovery for the three metals.

Samples were selected from the two main styles of mineralisation identified so far - massive sulphide vein breccias and fracture fill mineralisation.

 Sub-samples of pulverised material will be analysed to determine head grade (lead, zinc, silver, gold), deleterious element content (including arsenic, antimony, bismuth and cadmium) and to investigate the grade of potential by-product critical elements including indium, gallium and germanium, the firm added.

Tethyan is preparing to submit samples from drill core for petrology and ore microscopy work to investigate the mineralogy and mineral associations at Kizevak.

Tethyan shares are unchanged at $0.17.