CASTLE MINERALS LIMITED - KANDIA IS EMERGING AS A COHESIVE, MULTI-DEPOSIT GOLD CORRIDOR

About this update from Castle Minerals Ltd

Castle Minerals Limited ('Castle', 'the Company') (ASX: CDT) is pleased to report results from RC drilling at its Kandia Gold Project ('Kandia') in Ghana's emerging Upper West gold region. The 11-hole, 1,510m RC drilling programme was focused on the 4000 (nine holes) and 8000 (two holes) zones, which lie on the northeast-trending, 16km prospective contact between Birimian metasediments and a major granite intrusion, a typical setting for many gold deposits in West Africa . At its northern end, the Kandia structure abuts the tenure of the 2.8Moz mineral resource ( Black Volta Gold Project ) which is earmarked for development this year. Prior geochemical sampling and shallow RAB drilling had identified several zones of anomalism along the prospective corridor. Castle is systematically testing for primary mineralisation and enhancing its understanding of the specific controls on gold distribution. The focus is to delineate a large tonnage of shallow mineralisation across multiple, near-surface deposits with the benefit of the BVGP operation and infrastructure nearby. Drilling in both zones has confirmed the continuity of mineralisation along strike and to at least 150m below surface in the vicinity of previous wide-spaced first-pass drilling. Major zones of gold mineralisation are confined to specific ore shoots within persistent, broader mineralised structures. A better understanding of the controls on shoot development will enable additional mineralisation to be delineated. Castle's Executive Chairman, Stephen Stone , commented: 'The Kandia RC drilling programme has confirmed mineralisation in well-defined lodes with the host structure extending to 150m depth. Kandia is transforming from shallow anomalism to a series of prospects that have good depth and strike continuity. This bodes well for Castle's strategy of delineating a large, mineralised tonnage across multiple deposits on the 16km north-east trending Kandia corridor. A detailed structural analysis of the Kandia trend has identified new targets and enhanced understanding of key structural controls on gold distribution. We will apply this knowledge to the broader Kandia licence and across all of Castle's Wa East tenure. An auger geochemical sampling campaign will commence in early August to validate existing and new targets. Follow-up RC drilling to extend defined mineralisation and test new high-conviction targets is planned for September.' Four of the holes drilled at the 4000 zone (25KARC005 to 25KARC008) were designed to test the depth extent of the mineralised zones defined by previous drilling. The mineralised structure has been successfully extended to 150m below surface. Two holes (25KARC009 to 25KSRC010) drilled to the north intersected mineralisation immediately before they were curtailed for technical reasons. Two holes (25KARC0012 and KSRC0013) drilled to the east of the existing drilling were designed to test for possible mineralisation associated with interpreted structural targets located towards the margin of the granite contact. No notable intercepts were returned. These results complement intercepts from the previous RC drilling campaign which included 7m at 3.36g/t Au from 149m within 24m at 1.78g/t Au from 139m and 5m at 3.49g/t Au from 82m within 11m at 2.26g/t Au from 79m (refer ASX release 28 January 2025 ). Parallel north-trending structures appear to define the extent of mineralisation at the 4000 zone and could indicate a more extended northerly trend of mineralisation than previously thought. The next round of drilling will be designed to confirm this. 8000 ZONE At the 8000 zone, one of two holes drilled (25KARC015) was intended to test a zone of elevated gold mineralisation outlined in previous drilling campaigns and successfully achieved this, intersecting 4m at 1.11g/t Au from 23m and 2m at 4.15g/t Au from 38m. A second hole (25KARC014) was designed to test an interpreted east-west structure evident on aeromagnetic imagery. This structure appears to link the 8000-zone with a series of gold-bearing RC holes 200m to the east. No gold mineralisation was encountered. GOLD IN NORTHERN GHANA West Africa is regarded as one of the world's premier regions to be exploring for gold, delivering an enviable fifteen discoveries of over two million ounces each since 2012. Much of this new gold is found in Birimian-age 'greenstone' rocks, the host to many of West Africa's and Ghana's existing multi-million-ounce gold mines and the same rocks hosting mineralisation at Castle's Kpali and Kandia Gold Projects. Ghana's 'new frontier' northern region is increasingly regarded as one of the most prospective areas to make such discoveries in West Africa . Exploration in the region is very immature compared to Ghana's south, where several world-class mines have been operating for many decades. This immaturity in the northern region, along with its Birimian geology and structural setting, bodes well for further discoveries to be made, and Castle is well-positioned to participate in this process. Exploration at the Kandia Gold Project has only to look to 2.8Moz Black Volta Gold Project ('BVGP'), which is a relatively recent discovery. The majority of this gold was delineated by Castle's Executive Chairman, Stephen Stone , under his former stewardship of Azumah Resources Limited . Castle's Kandia mineralised trend is immediately to the south of the BVGP's high-grade Julie deposit. In the same region and to the north-east, lies the recently commissioned 5.1 Moz Namdini Gold Project , discovered by Cardinal Resources Limited prior to its takeover by Shandong Gold Limited in 2020. Namdini lies on the same Bole-Bolgatanga Birimian greenstone belt as Castle's Kandia discovery. Just across the border in Cote d'Ivoire , and 80km to the south of Castle's Kpali Gold Project , the Endeavour Mining plc owned Assafou deposit lies in a similar geological setting. It is an excellent and very encouraging example of what can be achieved in West Africa . Following an initial reconnaissance geochemical survey in 2018, Assafou has been fast-tracked to a Pre-Feasibility Study in 2024, supported by a 4.1Moz gold ore reserve. Contact: Stephen Stone Email: [email protected] Tel: +61 (0)418 804 564 ABOUT CASTLE MINERALS Castle Minerals Limited is an Australian Securities Exchange (ASX:CDT) listed and Perth, Western Australia headquartered company with interests in several projects in Ghana and Western Australia that are prospective for gold, graphite and base metals. In Ghana , West Africa , Castle's 100% owned Ghanaian subsidiary, Carlie Mining Ltd , owns the Kpali Gold Project in the Upper West Region which comprises the Kpali, Kpali East and Bundi gold prospects. The Kandia Gold Project is a standalone, separately located discovery. All occur in the highly prospective Birimian geological terrane, the host to many of West Africa's and Ghana's multi-million-ounce gold mines. The 100% owned Kambale Graphite Project is also located in Ghana's Upper West Region . It is being progressed through technical and commercial evaluation for the production of battery-grade material to be used in the manufacture of lithium-ion batteries. Farm-outs or sales have been sought for the Company's West Australian projects. The Polelle Project , 7km southeast of the operating Bluebird gold mine near Meekatharra, hosts a mainly obscured and minimally explored greenstone belt prospective for gold and possibly base metals. The Wanganui Project is prospective for down-plunge high-grade gold shoots. Both have been optioned for purchase to Great Boulder Resources Limited (ASX: GBR) for possible incorporation into its emerging Side Well project. The Beasley Creek Project is prospective for gold and lithium and lies on the northern flanks of the Rocklea Dome in the southern Pilbara. (C) 2025 Electronic News Publishing, source ENP Newswire

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