Predictive Discovery (ASX:PDI) maiden mineral resource estimate in the Argo area, within its Bankan project in Guinea, validates and enhances the prospectivity of the western margin of the Siguiri Basin in the region, according to a Wednesday note by Euroz Hartleys.

On Tuesday, the company reported a maiden mineral resource estimate of 3.1 million tonnes at 1.5 grams per tonne grade of gold for 153,000 gold ounces in the Argo area.

The estimates increase the project's overall mineral resource to 103.6 million tonnes at 1.7 g/t for roughly 5.5 million ounces of gold.

Euroz Hartleys noted that while the Argo addition is a modest increase, it plays an important role in reinforcing the broader exploration potential across the Bankan project.

The brokerage highlighted the emerging Sounsoun SW prospect at the project as another key area to watch for future resource growth.

The firm reiterated its view of Bankan as a Tier-1 gold development, citing strong exploration upside.

Euroz maintained the company's speculative buy rating on Predictive Discovery and kept its price target of AU$0.55.