Results from 243 samples, among 1,200 samples taken in a recent programme, include gold-in-sample grades from two new anomaly areas which are located away from and separate to the historic mining area.
Also, previously identified anomalies have been extended by the latest results, the firm added.
Alba noted that the average grades seen in the samples are above the average gold-in soil grades for the past mining areas.
"Our regional exploration of the Dolgellau Gold Belt continues to bear fruit,” said George Frangeskides, Alba's chairman.
He added: “We have now confirmed mineralisation across around six miles of the Gold Belt, and in total have identified seven new mineralised zones which are not associated with historic mine workings. The fact that the average grades for those zones exceeds the equivalent grades obtained over the Clogau-St David' s mine itself is genuinely exciting."
Frangeskides also pointed out that the exploration team are now back in the field, conducting infill and extension sampling.
In afternoon trading, shares in Alba Minerals edged 2% higher to 0.255p.
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