Trek Metals (ASX:TKM) said the first drill assays at its Kuro prospect in Western Australia confirm the discovery of an extensive, near-surface manganese system, according to a Thursday filing with the Australian bourse.

The company reported a "standout intercept" of 10 meters at over 42% manganese from 13 meters.

Other high-grade results include four meters at about 45% manganese from surface; 11 meters at 24% manganese from six meters; 13 meters at about 20% manganese from 24 meters; 11 meters at over 19% manganese from nine meters; and eight meters at more than 25% manganese from eight meters.

Remaining assay results from the rest of the phase-one drilling are expected over the next three to five weeks, the company said, adding that further earthmoving has started at Kuro ahead of upcoming drilling.

The company's shares rose past 5% in recent Thursday trade.