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Highlights
- Phase 1 RC drilling advances across Evanston corridor targeting high-priority structures and refinement of the geological model.
- First samples dispatched for PhotonAssay analysis to support rapid evaluation of drilling results.
- After the conclusion of drilling program at Evanston, resources will shift to Yerilgee Project to explore further gold-in-soil anomalies and mineralisation targets.
Catalina Resources Limited (ASX:CTN) has released an update on reverse circulation (RC) drilling currently underway at the Evanston Gold Project, located within the Yerilgee greenstone belt in the Central Yilgarn. Phase 1 drilling is progressing across high-priority targets designed to analyse high-priority structures and refine the existing model in areas with significant historical gold and copper results. Following this phase, the company plans to redirect drilling efforts to the nearby Yerilgee Project.
Phase 1 Drilling Targets High-Priority Zones
Phase 1 drilling is underway at the Leghorn, Viper South, and T1B prospects of the Evanston Project. The broader project area lies around 190 km from Kalgoorlie and spans multiple greenstone belts known for gold, lithium and Cu-Zn-Ag massive sulphide potential.
The program has been designed to test several geological and structural positions, including shear zones, deformation corridors, contacts between ultramafic, mafic and intrusive units, and areas coinciding with historical geochemical anomalism and magnetic signatures.
Historic exploration across the belt included airborne magnetics, soil geochemistry, limited ground geophysics and shallow reconnaissance drilling. While early work identified multiple priority targets, large parts of the trend remain untested by systematic modern drilling.
Historic Results and Continuous Sampling
The region has a record of notable historic drilling results such as:
- 48m @ 0.67g/t Au from 27m including 21m @ 1.13g/t Au from 54m and 3m @ 2.28g/t Au from 63m
- 7m @ 0.79% Cu and 535 ppb Au in massive sulphide from the same zone
- 18m @ 1.18 g/t Au from 16m, including 4m @ 3.8 g/t Au
- 15m @ 1.5 g/t Au from 12m, including 3m @ 6.7 g/t Au
- 33m @ 0.3 g/t Au from surface, including 3m @ 0.9 g/t Au from 27m
Sampling is continuous from surface to hole end, with the first samples sent to ALS Kalgoorlie for PhotonAssay. The PhotonAssay methodology allows for large-sample analysis with minimal preparation and fast processing, facilitating timely results assessment as drilling progresses.
Upcoming Focus: Drilling at Yerilgee Project
Once Phase 1 at Evanston concludes, drilling resources will relocate to the Yerilgee Project, targeting additional gold-in-soil anomalies and banded iron formation-hosted mineralisation. Prior results from Yerilgee include:
- 17m @ 4.1 g/t Au and 28.0 g/t Ag from 53m, including 4m @ 14.9 g/t Au and 72.2 g/t Ag from 54m
The next drilling activities will comprise both RC and air-core (AC) drilling across prospects including Chicken Little, Snowflake, T8, and Auger 2.
CTN Shares Rally
CTN shares were trading 16.67% higher at AUD 0.003 per share at the time of writing on 4 December 2025.
