Maritana lifts Burbanks resource above 2Moz: mine design and cut-off lens for engineers
Reviewed by Joe Ashwell

First reported on Australian Mining
30 Second Briefing
Maritana Minerals has lifted the Burbanks gold project mineral resource to 13.7 million tonnes at 1.7g/t for 755,000oz, adding 290,000oz and taking its total company mineral resource inventory above 2Moz. The Western Australian project’s previous estimate was 6.1Mt at 2.4g/t, so tonnage has more than doubled while grade has fallen, implying a larger, lower‑grade envelope. For mine planning and geotechnical teams, this shift points to potentially expanded pit shells or underground footprints, altered stripping ratios, and revised economic cut-off assumptions.
Technical Brief
- Updated mineral resource estimate (MRE) is explicitly reported under JORC-compliant “mineral resource” terminology, not reserves.
- Inventory uplift of 290,000oz materially affects potential mine life and sequencing options at Burbanks.
- Company-level resource now exceeds 2Moz, changing scale assumptions for corporate planning and funding discussions.
- Step-change in ounces at Burbanks likely reflects additional drilling data and remodelled mineralisation envelopes.
- Larger inventory at a single project can justify more detailed geotechnical domain modelling and pit/UG trade-off studies.
- Resource growth at a brownfields gold project aligns with recent WA trend of incremental ounces via near-mine drilling.
Our Take
Maritana Minerals’ move past the 2Moz resource mark at Burbanks sits alongside its 17,000m RC drilling push at the Boorara gold project near Kalgoorlie, signalling a broader strategy to assemble multiple satellite ore sources around the Black Swan processing hub in Western Australia.
The step-change in tonnage at Burbanks, even at a lower grade, typically favours bulk-tonnage open-pit scenarios, which could complement higher-grade underground feed from other Maritana assets if the Black Swan hub is configured for flexible blending.
Within our 415 gold‑keyword pieces, Western Australian gold projects like Burbanks are often advantaged by established permitting pathways; Maritana’s earlier approval for the Black Swan Processing Hub suggests it may be able to move additional Burbanks ounces into a development pipeline relatively quickly compared with greenfield peers.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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