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Reporting assumptions

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Ownership basis

Show the full project inventory before ownership adjustment.

Display scale

Display contained quantities in millions of ounces or tonnes.

Resource treatment

Normalise Resources to exclude Reserves: where a project is flagged inclusive, net Reserves out of Resources so the figure is additional Resources beyond Reserves. Unknown-convention rows are shown as stated.

Resource total

Total Resource includes Inferred (JORC convention). Totals are re-derived from category rows wherever the document discloses them.

Recovery basis

Show the issuer's headline recoverable figure as reported. Lithium-brine reserves already have the brine-processing recovery factor applied; everything else is shown as stated.

Commodity view

Primary view: each commodity in its own contained unit (oz / t).

Chibougamau

Quebec, Canada · Developing · 100.0% ownedManual entry

Current R&R by category

Whole-project rollup at the latest vintage per category: printed project-level rows are preferred, and mining areas are summed (tonnes-weighted grade) only where the issuer prints no project-level row. Per-area and per-source detail in the Current R&R table below.

Au

Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	As at
Measured	0.10 Mt	0.30 g/t	1 koz	17 Sept 2025
Indicated	6.30 Mt	0.80 g/t	0.17 Moz	17 Sept 2025
M&I = Measured + Indicated (overlaps both)	6.40 Mt	0.80 g/t	0.17 Moz	17 Sept 2025
Inferred	8.50 Mt	1.70 g/t	0.45 Moz	17 Sept 2025
Total Resources	14.90 Mt	1.31 g/t	0.62 Moz	17 Sept 2025
Proved	—	—	—	—
Probable	—	—	—	—
Total Reserves	—	—	—	—

M&I is the issuer's printed Measured + Indicated subtotal — it overlaps the Measured and Indicated rows and is never added alongside them; the Total rows and every rollup already exclude it.

Ag

Category	Tonnes (Mt)	Grade (g/t Ag)	Contained (Moz Ag)	As at
Measured	0.10 Mt	0.50 g/t	2 koz	17 Sept 2025
Indicated	6.30 Mt	7.80 g/t	1.56 Moz	17 Sept 2025
M&I = Measured + Indicated (overlaps both)	6.40 Mt	7.60 g/t	1.57 Moz	17 Sept 2025
Inferred	8.50 Mt	7.90 g/t	2.17 Moz	17 Sept 2025
Total Resources

Cu

Category	Tonnes (Mt)	Grade (% Cu)	Contained (Mt Cu)	As at
Measured	0.10 Mt	2.70%	4 kt Cu	17 Sept 2025
Indicated	6.30 Mt	2.30%	0.15 Mt Cu	17 Sept 2025
M&I = Measured + Indicated (overlaps both)	6.40 Mt	2.30%	0.15 Mt Cu	17 Sept 2025
Inferred	8.50 Mt	2.10%	0.18 Mt Cu	17 Sept 2025
Total Resources

Cut-off grade

1.5000 % Cu · 1.5000 g/t Au · 1.5000 g/t Ag · 1.2000 % Cu · 1.2000 g/t Ag · 1.2000 g/t Au · 1.8000 % Cu · 1.8000 g/t Au · 1.8000 g/t Ag

Price assumption

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JORC code year

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Peer benchmark — developing Cu projects (124 with resources)Resource size P56Resource grade P99View on grade-tonnage chart →

Percentile of this project's current total Resource among covered peers (P100 = largest / highest grade). Basis and Inferred toggles apply.

Data quality

Latest source: Chibougamau Resource Update Presentation · 17 Sept 2025
Reporting code: unknown
Convention: unknown
Currency assumption: US$
Disagreement flags: 36 rows

Current R&R

Resources

Area	Category	Tonnes (Mt)	Au		Ag		Cu		As at	Source	Provenance
Area	Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	Grade (g/t Ag)	Contained (Moz Ag)	Grade (% Cu)	Contained (Mt Cu)	As at	Source	Provenance
Total	Measured	0.10 Mt	0.30 g/t	1 koz	0.50 g/t	2 koz	2.70%

18Unverified

Total

M&I = Measured + Indicated (overlaps both)

6.40 Mt

0.80 g/t

0.17 Moz

7.60 g/t

1.57 Moz

2.30%

0.15 Mt Cu

17 Sept 2025

18Unverified

notes (16)

Source: Chibougamau Resource Update Presentation · published 02 Oct 2025

Ref: 18

Unknown code — Reporting code not yet captured for this row.
Cutoff 1.20 g/t Ag — Cut-off grade assumption from the source statement.

QA notes:

QA INFO: possible missing commodity coverage — the document prints Li grade/contained column(s) but the extraction emitted no Li rows; verify the R&R table columns (live class: GMTL Pilot Mountain Zn).
QA fix: document reports no Ore Reserves, so the resource-inclusive-of-reserves relationship is unstated — cleared to NULL
t91a extra E3 (p2 finding): printed Appendix A (Chibougamau 2025 Resource Update) prints per-block CATEGORY lines — Measured, Indicated, Measured & Indicated, Inferred — over columns "Tonnage Mt
Cu %
Au g/t
Ag g/t
CuEq %
AuEq g/t
Cu kt
Au koz
Ag koz
CuEq kt
AuEq koz" (the Hub and Spoke Inferred line reads "Inferred 8.5 2.1 1.7 7.9 3.5 4.8 182 454 2,168 295 1,318"). This row is its block's MEASURED & INDICATED line, not an all-category total, and the document prints NO all-category total for the block — a true total would be the M&I line plus the separately printed Inferred. Re-keyed total_resource -> m_and_i per the migration-0030 / t77a convention. Figures unchanged
t91a print-round

Total

Inferred

8.50 Mt

1.70 g/t

0.45 Moz

7.90 g/t

2.17 Moz

2.10%

0.18 Mt Cu

17 Sept 2025

18Unverified

notes (16)

Source: Chibougamau Resource Update Presentation · published 02 Oct 2025

Ref: 18

Unknown code — Reporting code not yet captured for this row.
Cutoff 1.20 g/t Au — Cut-off grade assumption from the source statement.

QA notes:

QA INFO: recompute differs 2.33% from the printed contained figure, but the printed tonnes/grade/contained are only good to ±3.05% (rounding granularity) — treated as reconciled. QA INFO: possible missing commodity coverage — the document prints Li grade/contained column(s) but the extraction emitted no Li rows; verify the R&R table columns (live class: GMTL Pilot Mountain Zn).
QA fix: document reports no Ore Reserves, so the resource-inclusive-of-reserves relationship is unstated — cleared to NULL
QA note (t91a p2): ROW SOUND, CAPTURE GAP CONFIRMED (see t91 reply CAPTURE block); the Li commodity-coverage flag is a FALSE POSITIVE, cleared. Printed Appendix A (Chibougamau 2025 Resource Update), Hub and Spoke block: "Inferred 8.5 2.1 1.7 7.9 3.5 4.8 182 454 2,168 295 1,318" (columns Tonnage Mt
Cu %
Au g/t
Ag g/t
CuEq %
AuEq g/t
Cu kt
Au koz
Ag koz
CuEq kt
AuEq koz). It cross-foots EXACTLY to the two printed group subtotals - Cu-COG Total Inferred 5.7Mt/43koz Au + Au-COG Total Inferred 2.8Mt/411koz Au = 8.5Mt/454koz - and exactly to the five deposit lines once Joe Mann is included. The four approved areas (Corner Bay 5.4Mt/41koz, Devlin 0.3Mt/2koz, Cedar Bay 0.8Mt/134koz, Golden Eye 1.2Mt/134koz) reach only 7.7Mt/311koz; the shortfall of 143koz is precisely the printed "Joe Mann Inferred 2.0 0.7 0.2 6.0 - 4.6 6.3 2 143 - 34 151" line, which is absent from the book for every commodity. Ag confirms it (1,543+3+309+313 = 2,168 EXACT, Joe Mann Ag printed as a dash) as does Cu (146+7+2+17+11 = 183 vs printed 182, one print step). Recompute 8.5Mt @1.7 = 465koz vs printed 454koz (+2.33%), inside the +/-3.05% granularity already noted. LI FLAG CLEARED: the only Li figures in this document are in the COMPLIANCE STATEMENTS - "previously reported Inferred Mineral Resource Estimate of 10.1Mt at 1.04% Li2O at Pontax Central" (ASX 14 August 2023 / 22 November 2024) - which belong to Cygnus's separate Pontax lithium project, not to Chibougamau. Appendix A's only grade/contained columns are Cu, Au, Ag, CuEq, AuEq; there is no Li column and no Li row is owed here.

Devlin

Measured

0.10 Mt

0.30 g/t

1 koz

0.50 g/t

2 koz

2.70%

4 kt Cu

17 Sept 2025

18Unverified

notes (4)

Source: Chibougamau Resource Update Presentation · published 02 Oct 2025

Ref: 18

Unknown code — Reporting code not yet captured for this row.
Cutoff 1.50 % Cu — Cut-off grade assumption from the source statement.

QA notes:

QA WARN: identical figures appear under ANOTHER area label of this project in the same document — likely one printed estimate stored twice (a summary/grouping line duplicating its leaf). Keep one copy; reject the relabelled twin. QA BLOCK: recomputed contained 2700.0000 t Cu vs reported 4000 t Cu (32.50% disagreement) QA INFO: identical figures to area(s) 'Total (CuEq table)' — likely the same printed line under two labels (a summary and a detail table); keep one label and reject the other. QA INFO: possible missing commodity coverage — the document prints Li grade/contained column(s) but the extraction emitted no Li rows; verify the R&R table columns (live class: GMTL Pilot Mountain Zn).
QA fix: document reports no Ore Reserves, so the resource-inclusive-of-reserves relationship is unstated — cleared to NULL

Devlin

M&I = Measured + Indicated (overlaps both)

0.80 Mt

0.20 g/t

0.01 Moz

0.30 g/t

0.01 Moz

2.10%

0.02 Mt Cu

17 Sept 2025

18Unverified

notes (16)

Source: Chibougamau Resource Update Presentation · published 02 Oct 2025

Ref: 18

Unknown code — Reporting code not yet captured for this row.
Cutoff 1.50 g/t Ag — Cut-off grade assumption from the source statement.

QA notes:

QA INFO: recompute differs 10.23% from the printed contained figure, but the printed tonnes/grade/contained are only good to ±12.00% (rounding granularity) — treated as reconciled. QA INFO: possible missing commodity coverage — the document prints Li grade/contained column(s) but the extraction emitted no Li rows; verify the R&R table columns (live class: GMTL Pilot Mountain Zn).
QA fix: document reports no Ore Reserves, so the resource-inclusive-of-reserves relationship is unstated — cleared to NULL
t91a extra E3 (p2 finding): printed Appendix A (Chibougamau 2025 Resource Update) prints per-block CATEGORY lines — Measured, Indicated, Measured & Indicated, Inferred — over columns "Tonnage Mt
Cu %
Au g/t
Ag g/t
CuEq %
AuEq g/t
Cu kt
Au koz
Ag koz
CuEq kt
AuEq koz" (the Hub and Spoke Inferred line reads "Inferred 8.5 2.1 1.7 7.9 3.5 4.8 182 454 2,168 295 1,318"). This row is its block's MEASURED & INDICATED line, not an all-category total, and the document prints NO all-category total for the block — a true total would be the M&I line plus the separately printed Inferred. Re-keyed total_resource -> m_and_i per the migration-0030 / t77a convention. Figures unchanged