Winsome Resources (ASX:WR1) started the next phase of cesium-focused exploration at its Sirmac-Clapier project in Canada, according to a Wednesday filing with the Australian bourse.

The field program will involve close-spaced sampling across the discovery outcrop to define targets for drill testing and investigate other outcrops within the company's landholding, the filing said.

Fieldwork is expected to take two to three weeks, with assay results anticipated in six to eight weeks, according to the filing.

Shares rose past 10% in morning trade Wednesday.