Prospect Resources (ASX:PSC) is ramping up drilling activity at the Nyungu Central deposit within its Mumbezhi copper project in north-west Zambia, as Phase 3 exploration results continue to reveal additional upside. The Mumbezhi project sits within Zambia's North-Western Province, part of the broader Central African Copperbelt — one of the world's most prolific copper-producing regions and a province that has attracted major investment from global miners including First Quantum and Barrick.

Four diamond drill rigs are currently operating as part of the company's ongoing Phase 3 exploration drilling program targeting the expanding Nyungu Central deposit. Results to date have continued to extend a newly identified mineralised zone, with wide copper intercepts returned from two additional extensional holes completed at the southern end of the deposit.

Managing Director and CEO Sam Hosack said the new intercepts complement the existing Indicated and Inferred May 2026 mineral resource estimate (MRE) defined at Nyungu Central of 154.4 million tonnes (Mt) at 0.42% copper.

"Our Phase 3 extensional drilling continues to deliver highly encouraging results, with further broad copper intercepts expanding and delineating an emerging mineralised zone southeast of Nyungu Central," Mr Hosack said.

"Importantly, these intercepts occur at and beyond the boundaries of the current Nyungu Central MRE and continue to demonstrate the strong association between copper mineralisation and the shallow, continuous AEM anomaly previously identified in this area."

Mr Hosack told shareholders that drilling activities continue to outpace assay turnaround times, creating a substantial pipeline of pending results across the broader Mumbezhi project. This includes recent drilling at Sharamba, where five completed drill holes have intersected visual copper mineralisation, along with seven priority drill holes at Nyungu Central for which assays remain pending.

"The consistency of results delivered to date through the Phase 3 program continues to validate our geological model and targeting strategy. More broadly, this drilling strengthens our conviction that Mumbezhi hosts a much larger copper system than is currently reflected in the existing MRE, highlighting the project's potential to deliver further resource growth in the near term," Mr Hosack said.

Phase 3 extensional drilling at Nyungu Central is focused on targeting high-priority growth areas at the southern end of the existing MRE. In this zone, copper mineralisation — characterised by chalcopyrite and chalcocite — occurs closer to surface up plunge before being terminated or offset by a major east-southeast trending fault. Chalcopyrite and chalcocite are the dominant copper-bearing minerals in sediment-hosted deposits across the Zambian Copperbelt, where they typically form in oxide and supergene-enriched zones amenable to open-pit extraction.

The sustained pace of drilling, with four rigs active and a backlog of pending assays at both Nyungu Central and Sharamba, positions Prospect Resources to progressively test its thesis that the Mumbezhi project hosts a substantially larger copper system than the current resource reflects. With copper demand underpinned by global electrification and grid-scale energy storage build-out, exploration success in the Central African Copperbelt continues to draw investor attention to junior developers advancing projects in the region.

Prior to market open, PSC shares were steady at 23.0 cents with a market capitalisation of $199.6 million.