Zimbabwe Platinum Mines (Zimplats) has confirmed that total mineral production for the three months to the end of June has been affected by a three-week strike.

A total of seven work days were lost across the quarter compared to the March quarter, with production dropping by 5 per cent compared to the previous quarter.

"The total volume extracted was lower than the projected due to the three-week work stoppage by the employees of the mining contractor. The dispute has since been resolved and all operations are back to normal," Zimplats said in a statement.

"The labour dispute although not dramatically influencing the volume mined for the quarter, impacted adversely on the input generated reserves."

The average grade for the four elements mined by Zimplats - platinum, palladium, rhodium and gold - equalled 3.14 grams per tonne, down from 3.20g/tonne during the first quarter.

"Ore grade although above budget was disappointing compared to the previous two quarters due to a high level of dilution as a result of mining operations taking place in a particularly faulted area," Zimplats stated.

The company also explained that high international prices were offset by a surge in operating costs.