Infini Resources (ASX:I88) started a maiden field program at the Reynolds Lake uranium project in Canada, which will include the collection of up to around 1,600 soil and rock-chip samples to refine the firm's exploration model, according to a Tuesday Australian bourse filing.

Work will also include geological mapping and prospecting, with scintillometer and magnetic susceptibility readings taken across the target sample sites, the filing said.

The program is designed to advance the highest-priority targets to drill-ready status for a potential phase one drilling program at the project in 2026.

The firm's shares fell nearly 4% in recent trading on Tuesday.