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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).

South Carlin

Nevada, USA · Developing · 100.0% ownedUnverified

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	13.61 Mt	0.92 g/t	0.40 Moz	30 Sept 2025
Indicated	92.30 Mt	0.69 g/t	2.06 Moz	30 Sept 2025
Inferred	55.72 Mt	0.56 g/t	1.01 Moz	30 Sept 2025
Total Resources	172.68 Mt	0.64 g/t	3.58 Moz	30 Sept 2025
Proved	—	—	—	—
Probable	—	—	—	—
Total Reserves	—	—	—	—

Ag

Category	Tonnes (Mt)	Grade (g/t Ag)	Contained (Moz Ag)	As at
Measured	2.62 Mt	6.05 g/t	0.51 Moz	30 Sept 2025
Indicated	48.06 Mt	4.48 g/t	6.92 Moz	30 Sept 2025
Inferred	1.30 Mt	2.65 g/t	0.11 Moz	30 Sept 2025
Total Resources	51.98 Mt	4.51 g/t	7.54 Moz	30 Sept 2025
Proved	—	—	—	—
Probable

Cut-off grade

2800.0000 g/t Au · 2800.0000 g/t Ag · 2.5700 g/t Au · 0.1700 g/t Au · 0.1030 g/t Au

Price assumption

US$2800.00/oz

JORC code year

—

Peer benchmark — developing Au projects (284 with resources)Resource size P81Resource grade P35View 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: Orla Mining Announces Results of the Updated Feasibility Study and Approves Start of Construction Spending for the South Railroad Project · 30 Sept 2025
Reporting code: unknown
Convention: inclusive
Currency assumption: US$
Disagreement flags: 7 rows

Current R&R

Resources

Area	Category	Tonnes (Mt)	Au		Ag		As at	Source	Provenance
Area	Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	Grade (g/t Ag)	Contained (Moz Ag)	As at	Source	Provenance
Total	Measured	13.61 Mt	0.92 g/t	0.40 Moz	—	—	30 Sept 2025	Table 6: South Carlin Mineral Resources – Total South Carlin ResourcesUnverified

Jasperoid Wash – Open Pit (Oxide)

Inferred

10.06 Mt

0.25 g/t

0.08 Moz

—

30 Sept 2025

South Railroad Technical Report Summary Information – Mineral Resources – Jasperoid Wash Mineral Resources (Oxide)Unverified

notes (5)

Source: Orla Mining Announces Results of the Updated Feasibility Study and Approves Start of Construction Spending for the South Railroad Project · published 15 Jan 2026

Ref: South Railroad Technical Report Summary Information – Mineral Resources – Jasperoid Wash Mineral Resources (Oxide)

Unknown code — Reporting code not yet captured for this row.
Cutoff 2,800.00 g/t Au — Cut-off grade assumption from the source statement.
@ US$ 2,800/oz — Metal price assumption used to derive this estimate.
inc — Stated Resources are inclusive of Reserves. Set Resources: Excl. Reserves to net them out.

QA notes:

QA WARN: mining_area 'Jasperoid Wash – Open Pit (Oxide)' equals the sum of sibling areas (arithmetic subtotal), not a leaf area — approving it alongside the leaf areas double-counts. Reject it (or reject the leaves) before approval. QA INFO: recompute differs 1.42% from the printed contained figure, but the printed tonnes/grade/contained are only good to ±2.61% (rounding granularity) — treated as reconciled.

North Bullion – Open Pit (Oxide)

Indicated

0.15 Mt

0.27 g/t

1 koz

—

30 Sept 2025

South Railroad Technical Report Summary Information – Mineral Resources – North Bullion Deposits Mineral Resources (Oxide)Unverified

notes (5)

Source: Orla Mining Announces Results of the Updated Feasibility Study and Approves Start of Construction Spending for the South Railroad Project · published 15 Jan 2026

Ref: South Railroad Technical Report Summary Information – Mineral Resources – North Bullion Deposits Mineral Resources (Oxide)

Unknown code — Reporting code not yet captured for this row.
Cutoff 2,800.00 g/t Au — Cut-off grade assumption from the source statement.
@ US$ 2,800/oz — Metal price assumption used to derive this estimate.
inc — Stated Resources are inclusive of Reserves. Set Resources: Excl. Reserves to net them out.

QA notes:

QA BLOCK: recomputed contained 1293.4245 oz vs reported 1000 oz (29.34% disagreement) Rounding-interval overlap exists at the printed granularity, but a 29.34% gap exceeds the 10% interval-waiver ceiling (t23 STM AuEq-miscopy precedent) — verify the printed contained figure before approval.

North Bullion – Open Pit (Oxide)

Inferred

0.22 Mt

0.36 g/t

3 koz

—

30 Sept 2025

South Railroad Technical Report Summary Information – Mineral Resources – North Bullion Deposits Mineral Resources (Oxide)Unverified

notes (5)

Source: Orla Mining Announces Results of the Updated Feasibility Study and Approves Start of Construction Spending for the South Railroad Project · published 15 Jan 2026

Ref: South Railroad Technical Report Summary Information – Mineral Resources – North Bullion Deposits Mineral Resources (Oxide)

Unknown code — Reporting code not yet captured for this row.
Cutoff 2,800.00 g/t Au — Cut-off grade assumption from the source statement.
@ US$ 2,800/oz — Metal price assumption used to derive this estimate.
inc — Stated Resources are inclusive of Reserves. Set Resources: Excl. Reserves to net them out.

QA notes:

QA BLOCK: recomputed contained 2523.1906 oz vs reported 3000 oz (15.89% disagreement) Rounding-interval overlap exists at the printed granularity, but a 15.89% gap exceeds the 10% interval-waiver ceiling (t23 STM AuEq-miscopy precedent) — verify the printed contained figure before approval.

Pony Creek – Appaloosa – VAT Leach (Oxide)

Inferred

3.54 Mt

0.51 g/t

0.06 Moz

—

30 Sept 2025

South Railroad Technical Report Summary Information – Pony Creek Estimated Mineral ResourcesUnverified

notes (5)

Source: Orla Mining Announces Results of the Updated Feasibility Study and Approves Start of Construction Spending for the South Railroad Project · published 15 Jan 2026

Ref: South Railroad Technical Report Summary Information – Pony Creek Estimated Mineral Resources

Unknown code — Reporting code not yet captured for this row.
Cutoff 0.17 g/t Au — Cut-off grade assumption from the source statement.
@ US$ 2,800/oz — Metal price assumption used to derive this estimate.
inc — Stated Resources are inclusive of Reserves. Set Resources: Excl. Reserves to net them out.

QA notes:

QA WARN: mining_area 'Pony Creek – Appaloosa – VAT Leach (Oxide)' equals the sum of sibling areas (arithmetic subtotal), not a leaf area — approving it alongside the leaf areas double-counts. Reject it (or reject the leaves) before approval. QA INFO: recompute differs 1.59% from the printed contained figure, but the printed tonnes/grade/contained are only good to ±1.84% (rounding granularity) — treated as reconciled.

Pony Creek – Stallion – Heap Leach (Oxide)

Inferred

7.76 Mt

0.21 g/t

0.05 Moz

—

30 Sept 2025

South Railroad Technical Report Summary Information – Pony Creek Estimated Mineral ResourcesUnverified

notes (5)

Source: Orla Mining Announces Results of the Updated Feasibility Study and Approves Start of Construction Spending for the South Railroad Project · published 15 Jan 2026

Ref: South Railroad Technical Report Summary Information – Pony Creek Estimated Mineral Resources

Unknown code — Reporting code not yet captured for this row.
Cutoff 0.10 g/t Au — Cut-off grade assumption from the source statement.
@ US$ 2,800/oz — Metal price assumption used to derive this estimate.
inc — Stated Resources are inclusive of Reserves. Set Resources: Excl. Reserves to net them out.

QA notes:

QA WARN: mining_area 'Pony Creek – Stallion – Heap Leach (Oxide)' equals the sum of sibling areas (arithmetic subtotal), not a leaf area — approving it alongside the leaf areas double-counts. Reject it (or reject the leaves) before approval. QA INFO: recompute differs 1.21% from the printed contained figure, but the printed tonnes/grade/contained are only good to ±3.33% (rounding granularity) — treated as reconciled.