Catalyst Metals reports a 75% expansion of the high-grade underground gold zone at Cinnamon, challenging existing geological models and supporting plans for increased production from the Plutonic Gold Belt.
- High-grade zone extended to 700m strike length
- Cinnamon deposit hosts structurally controlled conglomerate mineralisation
- Potential sixth underground ore source for Plutonic processing plant
- Supports Catalyst’s 10-year plan to double gold production
- Drilling confirms consistent widths and good ground conditions
Significant Extension of Cinnamon’s High-Grade Zone
Catalyst Metals Limited (ASX:CYL) has pushed the boundaries of its Cinnamon gold deposit with drilling results that extend a high-grade underground mineralised zone by 75% to a 700-metre strike length beneath the existing 145,000-ounce open pit Resource. The zone remains open along strike and at depth, suggesting further growth potential. Intercepts include standout hits such as 38 metres at 10.5 grams per tonne (g/t) gold and 17 metres at 21.5 g/t gold, confirming a consistent, wide, and high-grade underground zone.
This expansion challenges the traditional geological assumptions for the Plutonic Gold Belt, where gold mineralisation has historically been hosted in mafic and ultramafic rocks. Cinnamon’s mineralisation is instead structurally controlled within a conglomerate unit, a sedimentary sequence that opens new exploration frontiers across the belt. Catalyst’s Managing Director James Champion de Crespigny highlighted that Cinnamon “breaks the Plutonic geological model,” finding meaningful gold where it was previously overlooked.
Implications for Plutonic’s Production Growth
The Cinnamon deposit lies 25 kilometres from the underutilised Plutonic processing plant, which Catalyst aims to feed with ore from multiple underground sources. The company’s 10-year production plan targets increasing output from approximately 100,000 ounces per annum to around 200,000 ounces, primarily sourced from five underground mines: Plutonic Main, Plutonic East, Trident, K2, and Old Highway.
Cinnamon’s emerging high-grade zone offers a potential sixth underground ore source, adding valuable contingency to Catalyst’s growth strategy. This is particularly important given that two-thirds of the planned production is currently underpinned by Reserves, with the remainder reliant on inferred Resources and exploration targets. The extended mineralised zone at Cinnamon provides a tangible path to convert exploration targets into Resources and Reserves, thereby de-risking the company’s long-term production ambitions.
Recent developments at Trident, including resource extensions and completion of open pit mining, position Catalyst well as it shifts exploration focus towards Cinnamon and other deposits in the belt. The company’s strong balance sheet and operating cashflows support ongoing drilling and resource definition work at Cinnamon, reinforcing its confidence in achieving the ±200,000-ounce production target over the next decade. This aligns with the broader strategy to double Plutonic’s gold production and capitalise on the centralised processing infrastructure. The momentum at Cinnamon complements Catalyst’s advances at Trident and other projects, as detailed in recent Trident resource extensions and Trident open pit completion announcements.
Geological Setting and Exploration Approach
The Cinnamon trend extends over 10 kilometres and is characterised by a dominant northeast-trending shear zone cross-cut by smaller faults within a conglomerate host rock. This structural complexity appears to control gold mineralisation, with intersections at shear flexures hosting the highest grades. Drilling to date has been conducted on nominal 25 to 50-metre spacing, confirming geological and grade continuity in the main mineralised trend.
Drill core observations suggest good ground conditions for underground mining, an important factor for feasibility. Catalyst has completed 86 holes totalling over 25,000 metres in recent programs, employing both Reverse Circulation and diamond drilling techniques. Rigorous sampling and assaying protocols, including fire assay methods at multiple accredited laboratories, underpin the reliability of the results.
The drilling program continues to test the extent of mineralisation along strike and at depth, with early indications of repeated mineralised zones below the current high-grade trend. This raises the possibility of stacked ore bodies, which could enhance the deposit’s economic potential. Catalyst’s geological team is refining the structural framework to better target future drilling and resource definition.
Bottom Line?
Catalyst Metals’ Cinnamon discovery reshapes exploration prospects at Plutonic and adds a promising underground source to support doubling gold production.
Questions in the middle?
- How will ongoing drilling at Cinnamon influence updated Resource and Reserve estimates?
- What timeline does Catalyst envisage for integrating Cinnamon into underground mining operations?
- Could the structurally controlled conglomerate model at Cinnamon unlock other overlooked targets in the Plutonic Gold Belt?