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2026-11-06
◂ Monitor GBR ASX

Great Boulder Resources Limited

Scoping Study Developer · Gold · Australia Rating locked: sign in to view v6.2
Last 2026-11-06
A$0.061
1D
—
1M
—
YTD
—
1Y
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Upside
Locked: sign in to view
Mkt cap
A$120.4M
EV
A$101.5M
Cash
A$18.3M
Debt
A$281.7K
1 newer ASX announcement not yet reflected in this valuation

Portfolio detail

Assets

2 assets

Core asset

Side Well Gold Project

Australia

Scoping Study DeveloperGold

FY26 resource totals 1.021Moz at 2.0g/t (626koz Indicated, 395koz Inferred); Ironbark is 122koz at 2.7g/t after 2026 update. July 2025 scoping study used only the older 100koz Ironbark resource and is not a current mine plan. Yugunga-Nya mining agreement and Ironbark lease remain pending; smaller pit design may avoid road corridor.

Project location

Approximate location

Loading location…

© OpenStreetMap contributors. Basemap imagery © Esri (Maxar, Earthstar Geographics). Dated overlays contain modified Copernicus Sentinel data. Visible surface changes do not establish production or completion.

Published study economicsIssuer or study metrics
NPVA$100.4M8% discount
Initial capexA$3.1MPublished capital estimate
Operating cost50AUD/t processing

Pre-tax discounted cash flow at A$4,500/oz from the issuer sensitivity table, stated on a 100% project basis before applying GBR's 75% ownership.

Resources & reserves1
TypeCategoryQuantityGradeContained mineralsDate
Mineral ResourceIndicated plus Inferred16M tonnes2.0 g/t AuGold2025-12-18
Tenements2
e51-1905Granted131.8 km2 · No expiry supplied
m51-911Application— None · No expiry supplied
Milestones3
  1. Conclude Ironbark mining agreement with Yugunga-Nya

    Pending · High materiality

  2. Grow Side Well resource toward more than 1.5Moz

    Pending · Medium materiality

  3. Target Ironbark mining lease

    Pending · High materiality

Permits & approvals2
PermitJurisdictionStatusExpiryCritical path
Ironbark mining lease M51/911Western AustraliaPending—Yes
Ironbark mining and environmental approvalsWestern AustraliaRequired—Yes
Economic studies1
StudyStageStatusDateSummary
Ironbark Scoping StudyScoping StudyCurrent2025-07-17Preliminary two-stage open-pit and toll-treatment assessment based on the November 2023 Ironbark resource; no Ore Reserve and +/-30% accuracy.

Core asset

Peak Hill Gold Project

Australia

Resource StageGold

FY26 resource totals 481koz at 1.6g/t (376koz Indicated, 105koz Inferred) with seven granted mining leases. First GBR assays in August and September showed high grades but are not incorporated into the current resource. Year-end resource update and 2027 studies/approvals remain ahead; Westgold ore purchase agreement gives a possible processing route, not a sanctioned mine.

Project location

Approximate location

Loading location…

© OpenStreetMap contributors. Basemap imagery © Esri (Maxar, Earthstar Geographics). Dated overlays contain modified Copernicus Sentinel data. Visible surface changes do not establish production or completion.

Resources & reserves2
TypeCategoryQuantityGradeContained mineralsDate
Mineral ResourceIndicated plus Inferred9.4M tonnes1.6 g/t AuGold2026-05-04
Exploration TargetConceptual lower bound18.4M tonnes1.0-1.1 g/t Au conceptual rangeGold2026-05-04
Tenements3
e52-2471Granted— None · No expiry supplied
m52-35Granted— None · No expiry supplied
m52-56Granted— None · No expiry supplied
Milestones3
  1. Complete updated Peak Hill mineral resource

    Pending · High materiality

  2. Commence Peak Hill mining studies and approvals work

    Pending · High materiality

  3. Aspirational end-2027 production vision, not a production target

    Pending · High materiality

Permits & approvals2
PermitJurisdictionStatusExpiryCritical path
Peak Hill mining approvalsWestern AustraliaRequired—Yes
Jidi Jidi Mining and Heritage AgreementWestern AustraliaGranted—No