Catalina Resources Ltd (CTN.AX) Santy Delivers High-Grade Tungsten & Polymetallic Results

Perth, Aug 20, 2026 AEST (ABN Newswire) - Catalina Resources Limited (ASX:CTN), is pleased to provide an update to market regarding the Tallering Project and outcomes from its recent rock chip sampling program which delivered high grade tungsten and polymetallic results.

HIGHLIGHTS

- New geological model unlocks a largely untested tungsten opportunity at Santy, with strong W-Mo-Bi mineralisation coincident with a priority IP drill target.

- Rock-chip sampling by Catalina at the Santy Prospect, located within the broader Tallering Project returned up to 0.62% WO3; 46.2 ppm Sn; 12,300 ppm Bi; 1,480ppm Mo; 1.96% Cu; 530 ppm Ag and 5.70 g/t Au.

- Multi-element geochemistry confirms a fertile fractionated granitehydrothermal system with Rb up to 393 ppm; Cs up to 27.4 ppm; Li up to 123 ppm and Sn up to 46.2 ppm.

- Historic RC1 drilling returned up to 0.84% WO3; 1,690 ppm Mo and 2,220 ppm Bi; and rock-chip sampling returned tungsten values of up to 75.8% WO3.

- Review of historical and current data indicates Santy is consistent with an intrusion-related tungsten system associated with a concealed, fractionated felsic intrusive source.

- Strong W-Mo-Bi mineralisation coincides with the largely untested eastern IP conductivity anomaly, now a priority drill target with drill planning underway.

Executive Director, Mr Ross Cotton commented:

"Our recent work at Santy, including rock-chip sampling and geological mapping, combined with historical drilling and geophysics, is significantly advancing our understanding of the prospect. The results are building a very different geological picture to that targeted by previous explorers and provide further evidence for what we believe is an emerging tungsten-polymetallic system.

"Importantly, strong tungsten-molybdenum-bismuth mineralisation coincides with the largely untested eastern IP anomaly. With historical drilling completed before the IP survey, this target has never been systematically drill tested under the emerging geological model and provides a clear focus for our next phase of drilling.

"Against a strengthening tungsten market, we are moving quickly to advance Santy, targeting drilling, broader soil sampling and further fieldwork before the end of 2026 Tallering Project Background The Santy Prospect is located within Catalina's broader Tallering Project on the Tallering Greenstone Belt (Figure 1*). Historical exploration at Santy was predominantly focused on gold and base metals, with previous explorers largely targeting a VMS-style system.

In 2021 BPM Minerals subsequently defined a 2.2km-long gold anomaly at Santy, along strike from the nearby historical A Zone Deposit (63,000oz Au at 2.1g/t Au) and Mixy Deposit (65,000oz Au at 4.3g/t Au). The Mt Mulgine Project (Tungsten Mining ASX:TGN) located within the broader region, a major tungsten-molybdenum project which also hosts copper, gold and silver, provides further context for the emerging tungsten opportunity at Tallering.

Catalina's recent field activities combined with a detailed review of historical exploration results has now shifted the interpretation of Santy towards an intrusion-related tungsten-polymetallic system. Importantly, historical RC drilling predates the most recent IP survey, leaving the eastern conductivity anomaly largely untested and a priority target for drilling (Figure 2*).

Catalina Field Mapping and Rock-Chip Sampling

Catalina recently completed reconnaissance geological mapping and collected 25 rock-chip samples across Santy, Santy South and Nightjar within the broader Tallering project (Figure 3*).

Santy and Nightjar are particularly prospective and have been identified as two key prospects within the broader project area.

Santy Prospect

As a result of Catalina's review of historical drilling, geophysics, geological observations and new rock-chip results, the Santy prospect is considered to be more consistent with an intrusion-related tungsten system associated with a concealed, fractionated felsic intrusive source than the previously interpreted VMS model.

Evidence supporting this interpretation includes:

- Multiple intrusive phases including felsic porphyries, granites and pegmatites.

- Blue quartz veins and pegmatites commonly associated with evolved granitic systems.

- Quartz-sericite alteration, quartz veining and silicification.

- Strong W-Sn-Mo-Bi geochemical associations.

- Significant Au and Ag enrichment associated with W-Bi-Mo mineralisation.

- Elevated Cu, Pb and Zn associated with a broader hydrothermal sulphide system.

- Broad magnetic and gravity lows consistent with concealed felsic intrusive rocks.

- Conductivity anomalies coincident with the strongest drilling intersections.

Recent multi-element rock-chip analysis (detailed below) further strengthens the intrusionrelated interpretation, returning elevated fertility and fractionation indicator elements including Rb up to 393 ppm (SY07), Cs up to 27.4 ppm (SY07), Li up to 123 ppm (SY07), Sn up to 46.2 ppm (SY11) and Ta up to 6.21 ppm (SY07). The coincidence of these elements with elevated tungsten, bismuth and molybdenum provides strong evidence for a highly evolved and fertile granite-related system. Elevated copper, silver, lead and zinc associated with the W-Mo-Bi mineralisation indicate a broader hydrothermal sulphide assemblage related to the mineralisation.

Historical Drilling at Santy

Review of historic RC drilling (SRC007-SRC005-SRC006) indicates elevated tungsten, molybdenum and bismuth are consistently associated with felsic intrusive rocks, rhyolite and altered felsic host units rather than amphibolite. Mineralisation commonly occurs within felsic rocks or at contacts between felsic rocks and amphibolite (Figure 4*).

As previously reported1 by Catalina, multiple high-grade tungsten bearing assays recognised from this historical RC drilling, include:

- 17m @ 0.178% WO3 from 79m (SRC006), including:

o 4m @ 0.367% WO3 from 79m, including 1m @ 0.839% WO3 from 81m and 1m @ 0.531% WO3 from 82m; and

o 1m @ 0.484% WO3 from 85m.

- 6m @ 0.200% WO3 from 6m (SRC006), including:

o 3m @ 0.224% WO3 from 9m.

- 3m @ 0.154% WO3 from 99m to end of hole (SRC007)

- 1m @ 0.077% WO3 from 52m (SRC005)

Santy Rock-Chip Sampling

Catalina collected 12 rock-chip samples from the Santy Prospect with several samples returning strongly anomalous tungsten, tin, bismuth, molybdenum, silver and gold values associated with blue quartz veins, pegmatites and felsic porphyry. The outcrop at Santy is dominated by felsic porphyry and felsic volcanics. The volcanics are usually sub cropping below regolith cover and not exposed at surface (Figure 5*).

Numerous mafic dykes are interpreted which are weathering negatively from topographic lows and possible amphibolites in the east are associated with regolith rich in iron pisolites. Veins of blue quartz and pegmatites outcrop in the central area trending north south. Much of the geology at Santy is undercover with limited outcrop thereby emphasising the need for soil sampling to determine geological understanding.

The rock chip results consistently revealed a strong W-Bi-Mo association (Table 1*). Particularly significant is sample SY09 (Figure 6*), where blue quartz vein and pegmatite-associated mineralisation returned 0.31% W03; 39ppm Sn; 12,300 ppm Bi; 1,480 ppm Mo; 0.15% Cu; 9.01 ppm Ag; 0.826 g/t Au (Table 1). This association is considered supportive of a fractionated granite-related mineral system.

Santy Geophysics

The Santy Prospect is characterised by a broad magnetic low (Figure 8*) coincident with a regional gravity low (Figure 9*). In addition, IP (induced polarisation) surveying has identified conductivity anomalies that spatially correlate with the strongest W-Mo-Bi mineralisation defined by drilling and rock-chip sampling (Figure 10*).

These features are considered consistent with a concealed felsic intrusive source and support the interpretation of a granite-related mineral system. The eastern conductivity anomaly, associated with the SRC007-SRC005-SRC006 trend, remains a priority target for follow-up drilling.

Nightjar

Nightjar is located approximately 5.6 km south-west of Santy and based on current geological, geophysical and geochemical information, appears to represent a separate mineral system from the intrusion-related tungsten-gold system identified at Santy.

Reconnaissance mapping identified quartz veins, a prominent north-south fault zone and mafic dykes along the eastern margin of the prospect (Figure 11*).

Nightjar Geophysics

Nightjar displays a distinctly different geophysical signature to Santy. Although situated within a broader magnetic-low domain, the prospect is located on the margin of a localised gravity high interpreted to potentially represent a buried mafic body.

Seven rock-chip samples were collected at Nightjar, with results returning elevated base metal values in sample NJ01 (Figure 12*) including up to 893 ppm Pb, 412 ppm Zn, and 83.9 ppm Cu (Table 2*).

In contrast to Santy, Nightjar returned a base-metal dominant signature with values up to 893 ppm Pb and 412 ppm Zn. This distinct geochemical signature suggests Nightjar may represent a separate mineral system, with potential for VMS-style mineralisation (Table 3*).

Further mapping and soil geochemistry are planned.

Next Steps

Following completion of heritage clearances, the Company is targeting completion of the next phase of exploration at Santy before the end of 2026, including drill testing of the IP target and blue quartz zone, soil sampling across the broader Santy Prospect (Figure 13*), and additional geological mapping and fieldwork.

*To view tables and figures, please visit:
https://abnnewswire.net/lnk/FTE7F24O

About Catalina Resources Ltd

Catalina Resources Ltd (ASX:CTN) is a mineral exploration company focused on discovering and advancing gold and multi-commodity projects in tier-one jurisdictions. Backed by a technically experienced team with deep industry knowledge, Catalina is committed to creating value through focused exploration across highly prospective and underexplored regions in Western Australia.

The company's core assets are located in the Central Yilgarn and Laverton regions, two of the most historically productive and geologically endowed gold provinces in the country. Both projects have demonstrated the potential to host significant mineralisation, with early-stage drilling already delivering promising results.

  

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