Castle Minerals (ASX:CDT) sharpens drill focus in Ghana’s ‘new frontier’

Castle Minerals (ASX:CDT) has fired the starting gun on a 410-sample auger drilling campaign at its Kandia Gold Project in Ghana, aimed at extending existing zones and pinpointing new targets across some of West Africa’s most prospective Birimian terrane.

The Upper West region of Ghana, long overshadowed by the country’s southern goldfields, is rapidly emerging as a new exploration frontier.

Here, Castle is leveraging high-resolution aeromagnetic surveys to home in on regional-scale structures that in neighbouring projects have hosted multi-million-ounce discoveries.

Highlights include:

• Auger campaign at Kandia: 410 samples across known zones and new targets.

• Next stop Kpali: A similar program planned following reinterpretation of aeromagnetic data.

• Regional footprint: Proposed Côte d’Ivoire acquisition secures 1,842km² on the border.

• Prospectivity: Northern Ghana now seen as directly analogous to Côte d’Ivoire’s gold renaissance.

The Kandia program will zero in on priority sites where Castle’s modelling suggests near-surface gold anomalism may be present. Should auger results confirm this, follow-up RC drilling is planned.

The northern section of the licence will receive particular attention, where a prospective sheared contact with a granite intrusive trends towards Azumah’s multi-million-ounce Black Volta deposits.

“Several deeply penetrating structures traverse Castle’s tenure and, using our recently reprocessed high-resolution aeromagnetic data, we’ve been able to more accurately position where these coincide with the prospective Birimian rocks,” said executive chairman Stephen Stone.

Meanwhile, Castle Minerals proposed acquisition of Mineralis Ltd broadens the canvas.

With seven permits straddling the Côte d’Ivoire–Ghana border, the deal adds jurisdictional diversification and exposure to a region enjoying a wave of exploration investment.

Côte d’Ivoire is often cited as one of West Africa’s most exciting growth stories, with multiple new mines already in development.

The exploration push is being executed with Ghana-based Sahara Mining Services, using auger samples from depths of 5 to 12 metres to penetrate beneath the soil cover.

Lines are spaced at 400 metres, with 40-metre intervals, ensuring broad coverage of high-priority structural trends.

For investors, the Kandia and Kpali projects highlight Castle’s long-held thesis: that northern Ghana’s geology remains underexplored but highly fertile.

The company now controls large swathes of ground along prospective greenstone belts, with its Côte d’Ivoire expansion adding scale and optionality.

While outcomes remain contingent on results, Castle’s methodical approach combining modern geophysics with low-cost auger work mirrors strategies that have led to some of West Africa’s biggest discoveries.

For those following the region’s evolving gold map, the next few quarters will be watched with keen interest.

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