Catalyst Metals says infill drilling at the Cinnamon deposit has confirmed the continuity, width and grade needed for bulk-scale underground mining, strengthening its plan to make Cinnamon the sixth ore source in the Plutonic Gold Belt.
The undeveloped deposit lies about 25 kilometres from Catalyst's underutilised two-million-tonne-a-year Plutonic processing plant. The company is targeting a lift in annual belt production from about 100,000 ounces to approximately 200,000 ounces through a portfolio of operating and new mines.
Thick high-grade intercepts support mine design
Latest results from the infill program include 27 metres at 20.5 grams per tonne gold, 60 metres at 9.2 grams per tonne and 57 metres at 6.9 grams per tonne. Other reported intervals include 36 metres at 6.3 grams per tonne, 35 metres at 6.1 grams per tonne and 13 metres at 19.1 grams per tonne.
Catalyst said drilling had confirmed consistent widths across the orebody and broad zones of continuous mineralisation. That geometry is expected to support larger underground stopes and reduce mining risk compared with a narrow, highly variable system.
Resource and Reserve update approaching
The high-grade shoot was discovered beneath the existing Cinnamon open pit in 2025 and has since been delineated over about 700 metres of strike. The latest infill program is intended to support an updated Mineral Resource and Ore Reserve, which Catalyst expects to release in the coming weeks.
Managing Director and Chief Executive Officer James Champion de Crespigny said the project had moved rapidly from discovery toward Reserve definition, with production intended to follow. He said existing operations and infrastructure were enabling that pace of development.
Parallel zones provide further upside
Part of the drilling also tested repeating conglomerate units above and below the known high-grade shoot. Results including eight metres at 4.7 grams per tonne gold, eight metres at 1.6 grams per tonne and 0.5 metres at 21 grams per tonne confirmed mineralisation in alternative units.
Catalyst plans follow-up work across those targets and deeper drilling to test additional conglomerate units. The company believes multiple parallel shears and cross-cutting faults along the broader, more than 10-kilometre Cinnamon trend provide further discovery opportunities.
The planned production model combines ore from Plutonic Main, Plutonic East and K2 with new sources including Trident, Cinnamon and Old Highway. Multiple mines are intended to support stockpile management, processing flexibility and lower operating risk across the long-term plan.
Project snapshot
Cinnamon sits in the 40-kilometre Plutonic Gold Belt in central Western Australia. Before Catalyst's recent drilling, the deposit hosted a reported Mineral Resource of three million tonnes at 1.5 grams per tonne gold for 145,000 ounces.
Source: Catalyst Metals ASX announcement, 2 September 2026. Hero image: Catalyst Metals, Plutonic Gold Belt.