06:02 ET 1911 Gold Reports Positive Metallurgical Results of 93.7% for True North and 96.3% for Ogama-Rockland 1911 Gold Corporation ("1911 Gold" or the "Company") (TSXV: AUMB) (OTCQX: AUMBF) (FRA: 2KY) is pleased to report the results of metallurgical gold...

Original announcement by cnw on

Company
1911 Gold Corporation
Ticker
AUMB
Exchange
Unavailable
Region
Manitoba, Canada
Primary commodity
Gold
Secondary commodities
None reported
Document categories
Metallurgy
Extracted
2026-08-24 03:52:49 UTC

Analysis by Minestarters Atlas

Minestarters Atlas analysis

Summary

1911 Gold Corporation announced positive metallurgical test results for its True North and Ogama-Rockland Gold Projects in Manitoba, Canada. The True North project achieved average gold recoveries of 93.7% from a gravity-flotation-leach flowsheet, while the Ogama-Rockland project demonstrated 96.3% total gold recovery. These results confirm the amenability of the ore to conventional processing with moderate reagent consumption and no acid-generating potential, supporting the company's plans for test mining and mill recommissioning.

Reasoning: 1911 Gold reported excellent gold recoveries of 93.7% for True North and 96.3% for Ogama-Rockland, supported by detailed metallurgical test work. The results indicate favorable processing characteristics, including significant gravity recovery, moderate reagent consumption, and no deleterious elements, which de-risk future production decisions.

Positive factors

  • High gold recoveries for both projects
  • Significant gravity recoverable gold component
  • Moderate to low reagent consumption
  • Low ore hardness (BMWI)
  • No acid-generating or deleterious metal leaching potential
  • Clean ore material amenable to high recoveries

Negative factors

  • Some test work is preliminary, requiring further studies and optimization
  • Testing limited to single composite samples for both projects, requiring wider range of host rock samples

Facts used in scoring: 82

Atlas analysis — 1911 Gold Corporation: 06:02 ET 1911 Gold Reports Positive Metallurgical Results of 93.7% for True North and 96.3% for Ogama-Rockland 1911 Gold Corporation ("1911 Gold" or the "Company") (TSXV: AUMB) (OTCQX: AUMBF) (FRA: 2KY) is pleased to report the results of metallurgical gold.... 51% recovery; 44.5% recovery; 95.5% recovery

Classification and evidence

High Recoverypositive

Recovery at or above the exceptional band for the commodity and processing route.

Why it applies: Total gold recoveries of 93.7% for True North and 96.3% for Ogama-Rockland are well above the exceptional band for gold mill/CIL processing.

Evidence · text

“Positive Metallurgical Results of 93.7% for True North and 96.3% for Ogama-Rockland”

QA/QC Disclosedpositive · Story-specific tag

Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).

Why it applies: The release explicitly states that ALS Canada Ltd. (Metallurgy Services) is ISO-9001:2015 certified and accredited by the Standards Council of Canada, and that the work was reviewed by Robert Sloan, P.Eng.

Evidence · text

“ALS Canada Ltd. (Metallurgy Services), Kamloops, Canada for the metallurgical recovery test work which is ISO-9001:2015 certified (Certificate No. FS 63170) and is accredited by the Standards Council of Canada for the specific tests undertaken.”

QP/CP Signedpositive · Story-specific tag

Qualified Person (QP) or Competent Person (CP) named and signed off — a member of a recognized professional association (e.g., AusIMM, SME, AIG, P.Geo) with relevant experience.

Why it applies: The scientific and technical information was reviewed and approved by Michele Della Libera, P.Geo., and Roselyn Yeboah, P.Eng., who are 'Qualified Persons' under NI 43-101.

Evidence · text

“The scientific and technical information in this news release has been reviewed and approved by Michele Della Libera, P.Geo., V.P. Exploration, and Roselyn Yeboah, P.Eng., Senior Metallurgist, of 1911 Gold Corporation, who are "Qualified Persons" as defined under NI 43-101.”

Free Millingpositive

Simple, clean ore amenable to standard processing without oxidation.

Why it applies: The True North ore showed no acid-generating or deleterious metal leaching potential, and Ogama-Rockland material was described as 'clean nature of material'.

Evidence · text

“no acid-generating and deleterious metal leaching potential”

Bench Scale Onlynegative

Only preliminary bench tests completed — no locked-cycle or pilot work.

Why it applies: The test work involved 'Cyanidation bottle roll leach tests' and 'preliminary metallurgical test-work program', indicating bench-scale testing rather than pilot plant operations.

Evidence · text

“Cyanidation bottle roll leach tests were conducted”

Single Domain Onlynegative

Testing limited to one composite or domain — representativeness not established.

Why it applies: For True North, a '130 kilogram sample' from the 'L10 Zone' was used, and for Ogama-Rockland, a 'composite sample from fresh quartered drill core' was used, suggesting limited domain variability testing.

Evidence · text

“A 130 kg sample was collected from the L10 Zone”

Mill Routeneutral

Processing via mill or concentrator (CIL, CIP, tank leach, flotation).

Why it applies: The metallurgical test work describes a flowsheet involving gravity, flotation, regrind, and cyanide leaching, which is characteristic of a mill processing route.

Evidence · text

“Gravity-Flotation-Regrind-Leach flowsheet”

Extracted facts

Stored fact records: 82. Some facts used in scoring do not have a stored record.

Metallurgical Results (82)

gravity concentrationTrue North · goldRecovery: 51 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
gravity concentration
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
130 kg sample from L10 Zone, Level 16

Recovery

Recovery
51 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: High gold recovery of 51.0% achieved via gravity concentration for the True North project, indicating a significant free gold component.

Positive factors

  • High gravity recovery component
  • Favorable processing characteristics

Negative factors

  • Testing limited to single composite sample

Evidence · text

“Recovery averaging 51.0% Au by gravity concentration”
flotationTrue North · goldRecovery: 44.5 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
flotation
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
130 kg sample from L10 Zone, Level 16

Recovery

Recovery
44.5 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: An average of 44.5% of gold reported to the flotation concentrate for the True North project, indicating good amenability to flotation.

Positive factors

  • Significant gold reporting to flotation concentrate
  • Favorable processing characteristics

Negative factors

  • Testing limited to single composite sample

Evidence · text

“An average of 44.5% of gold reporting to the flotation concentrate”
cyanide leach (flotation concentrate)True North · goldRecovery: 95.5 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
cyanide leach (flotation concentrate)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
130 kg sample from L10 Zone, Level 16

Recovery

Recovery
95.5 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: High leach recovery averaging 95.5% Au from the reground flotation concentrate for the True North project, indicating excellent amenability to cyanidation.

Positive factors

  • High leach recovery from concentrate
  • Favorable processing characteristics

Negative factors

  • Testing limited to single composite sample

Evidence · text

“Leach recovery averaging 95.5% Au from the reground flotation concentrate”
total recovery (gravity + flotation + leach)True North · goldRecovery: 93.7 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
130 kg sample from L10 Zone, Level 16

Recovery

Recovery
93.7 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recoveries averaging 93.7% for the True North project, indicating excellent overall metallurgical performance.

Positive factors

  • High Recovery
  • Favorable processing characteristics

Negative factors

  • Testing limited to single composite sample

Evidence · text

“Total Au recoveries averaging 93.7 percent”
comminutionTrue North · goldView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
comminution
Processing Route
grinding
Sample
main composite
Grind P80
106 µm

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: A Ball Mill Work Index (BMWI) of 14.1 kWh/t indicates the True North ore is on the lower end of medium hardness, suggesting favorable grinding costs and potential for higher throughput.

Positive factors

  • Low ore hardness
  • Potential for higher throughput

Evidence · text

“Ball Mill Work Index ("BMWI") of 14.1 kilowatt hours per tonne ("kWh/t") indicating the low end of the medium hardness range”
environmentalTrue North · goldView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
environmental
Processing Route
n/a
Sample
main composite

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Environmental tests confirmed no potential for acid generation or measurable deleterious metal leaching from the True North ore, which is a positive for permitting and operational costs.

Positive factors

  • No acid-generating potential
  • No deleterious metal leaching potential

Evidence · text

“no acid-generating and deleterious metal leaching potential”
gravity concentrationOgama-Rockland · goldRecovery: 82 %Head Grade: 4.65Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
Ogama-Rockland
Commodity
gold
Ticker
AUMB

Test Work

Program Status
preliminary
Test Type
gravity concentration
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
composite sample from recent drill core

Recovery

Recovery
82 %
Recovery Basis
actual_test
Head Grade
4.65
Head Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: High gold recovery of 82.0% achieved by gravity concentration for the Ogama-Rockland project, indicating a significant free gold component.

Positive factors

  • High gravity recovery component
  • Favorable processing characteristics

Negative factors

  • Preliminary test work
  • Testing limited to single composite sample

Evidence · text

“Gold recovery of 82.0% Au by gravity concentration”
cyanide leach (flotation concentrate)Ogama-Rockland · goldRecovery: 97.7 %Head Grade: 4.65Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
Ogama-Rockland
Commodity
gold
Ticker
AUMB

Test Work

Program Status
preliminary
Test Type
cyanide leach (flotation concentrate)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
composite sample from recent drill core

Recovery

Recovery
97.7 %
Recovery Basis
actual_test
Head Grade
4.65
Head Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: High gold recovery of 97.7% Au by leaching the reground flotation concentrate for the Ogama-Rockland project, indicating excellent amenability to cyanidation.

Positive factors

  • High leach recovery from concentrate
  • Favorable processing characteristics

Negative factors

  • Preliminary test work
  • Testing limited to single composite sample

Evidence · text

“Gold recovery of 97.7% Au by leaching the reground flotation concentrate”
total recovery (gravity + flotation + leach)Ogama-Rockland · goldRecovery: 96.3 %Head Grade: 4.65Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
Ogama-Rockland
Commodity
gold
Ticker
AUMB

Test Work

Program Status
preliminary
Test Type
total recovery (gravity + flotation + leach)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
composite sample from recent drill core
Leach Time
72 hours

Recovery

Recovery
96.3 %
Recovery Basis
actual_test
Head Grade
4.65
Head Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 96.3% Au for the Ogama-Rockland project, indicating excellent overall metallurgical performance with a conventional flowsheet.

Positive factors

  • High Recovery
  • Favorable processing characteristics

Negative factors

  • Preliminary test work
  • Testing limited to single composite sample

Evidence · text

“Total Au recovery of 96.3% Au based on a Gravity-Flotation-Regrind-Leach flowsheet”
environmentalOgama-Rockland · goldView all details
Link to this fact

Identity

Project
Ogama-Rockland
Commodity
gold
Ticker
AUMB

Test Work

Program Status
preliminary
Test Type
environmental
Processing Route
n/a
Sample
composite sample from recent drill core

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Preliminary test work for Ogama-Rockland confirmed the clean nature of the material, which is amenable to high recoveries at the True North mill.

Positive factors

  • Clean ore material

Negative factors

  • Preliminary test work

Evidence · text

“confirmed the clean nature of material which is amenable to high recoveries at the True North mill”
gravity concentrationTrue North · goldRecovery: 53.8 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
gravity concentration
Processing Route
gravity, flotation
Sample
Test T1 composite
Grind P80
147 µm

Recovery

Recovery
53.8 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.08
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Gravity recovery of 53.8% for Test T1 at 147 µm grind size, indicating good free gold liberation.

Positive factors

  • High gravity recovery component

Negative factors

  • Testing limited to single composite sample

Evidence · table

“53.8 %”

Context: 147

flotationTrue North · goldRecovery: 41.8 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
flotation
Processing Route
gravity, flotation
Sample
Test T1 composite
Grind P80
147 µm

Recovery

Recovery
41.8 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.08
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Flotation recovery of 41.8% for Test T1 at 147 µm grind size, contributing to overall gold recovery.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“41.8 %”

Context: 147

gravity concentrationTrue North · goldRecovery: 24.9 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
gravity concentration
Processing Route
gravity, flotation
Sample
Test T4 composite
Grind P80
147 µm

Recovery

Recovery
24.9 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.06
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Gravity recovery of 24.9% for Test T4 at 147 µm grind size.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“24.9 %”

Context: 147

flotationTrue North · goldRecovery: 71.8 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
flotation
Processing Route
gravity, flotation
Sample
Test T4 composite
Grind P80
147 µm

Recovery

Recovery
71.8 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.06
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Flotation recovery of 71.8% for Test T4 at 147 µm grind size, indicating strong flotation performance.

Positive factors

  • High flotation recovery component

Negative factors

  • Testing limited to single composite sample

Evidence · table

“71.8 %”

Context: 147

gravity concentrationTrue North · goldRecovery: 42.5 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
gravity concentration
Processing Route
gravity, flotation
Sample
Test T5 composite
Grind P80
147 µm

Recovery

Recovery
42.5 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.08
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Gravity recovery of 42.5% for Test T5 at 147 µm grind size.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“42.5 %”

Context: 147

flotationTrue North · goldRecovery: 53.1 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
flotation
Processing Route
gravity, flotation
Sample
Test T5 composite
Grind P80
147 µm

Recovery

Recovery
53.1 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.08
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Flotation recovery of 53.1% for Test T5 at 147 µm grind size.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“53.1 %”

Context: 147

gravity concentrationTrue North · goldRecovery: 57.1 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
gravity concentration
Processing Route
gravity, flotation
Sample
Test T2 composite
Grind P80
112 µm

Recovery

Recovery
57.1 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.06
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Gravity recovery of 57.1% for Test T2 at 112 µm grind size, indicating good free gold liberation.

Positive factors

  • High gravity recovery component

Negative factors

  • Testing limited to single composite sample

Evidence · table

“57.1 %”

Context: 112

flotationTrue North · goldRecovery: 39.6 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
flotation
Processing Route
gravity, flotation
Sample
Test T2 composite
Grind P80
112 µm

Recovery

Recovery
39.6 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.06
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Flotation recovery of 39.6% for Test T2 at 112 µm grind size, contributing to overall gold recovery.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“39.6 %”

Context: 112

gravity concentrationTrue North · goldRecovery: 49 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
gravity concentration
Processing Route
gravity, flotation
Sample
Test T6 composite
Grind P80
112 µm

Recovery

Recovery
49 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.06
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Gravity recovery of 49.0% for Test T6 at 112 µm grind size.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“49.0 %”

Context: 112

flotationTrue North · goldRecovery: 47.7 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
flotation
Processing Route
gravity, flotation
Sample
Test T6 composite
Grind P80
112 µm

Recovery

Recovery
47.7 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.06
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Flotation recovery of 47.7% for Test T6 at 112 µm grind size.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“47.7 %”

Context: 112

gravity concentrationTrue North · goldRecovery: 38.4 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
gravity concentration
Processing Route
gravity, flotation
Sample
Test T7 composite
Grind P80
112 µm

Recovery

Recovery
38.4 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.09
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Gravity recovery of 38.4% for Test T7 at 112 µm grind size.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“38.4 %”

Context: 112

flotationTrue North · goldRecovery: 56.7 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
flotation
Processing Route
gravity, flotation
Sample
Test T7 composite
Grind P80
112 µm

Recovery

Recovery
56.7 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.09
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Flotation recovery of 56.7% for Test T7 at 112 µm grind size.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“56.7 %”

Context: 112

gravity concentrationTrue North · goldRecovery: 59.9 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
gravity concentration
Processing Route
gravity, flotation
Sample
Test T16 composite
Grind P80
112 µm

Recovery

Recovery
59.9 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.11
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Gravity recovery of 59.9% for Test T16 at 112 µm grind size, indicating good free gold liberation.

Positive factors

  • High gravity recovery component

Negative factors

  • Testing limited to single composite sample

Evidence · table

“59.9 %”

Context: 112

flotationTrue North · goldRecovery: 34.1 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
flotation
Processing Route
gravity, flotation
Sample
Test T16 composite
Grind P80
112 µm

Recovery

Recovery
34.1 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.11
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Flotation recovery of 34.1% for Test T16 at 112 µm grind size.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“34.1 %”

Context: 112

gravity concentrationTrue North · goldRecovery: 55.8 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
gravity concentration
Processing Route
gravity, flotation
Sample
Test T17 composite
Grind P80
112 µm

Recovery

Recovery
55.8 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.14
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Gravity recovery of 55.8% for Test T17 at 112 µm grind size, indicating good free gold liberation.

Positive factors

  • High gravity recovery component

Negative factors

  • Testing limited to single composite sample

Evidence · table

“55.8 %”

Context: 112

flotationTrue North · goldRecovery: 36.5 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
flotation
Processing Route
gravity, flotation
Sample
Test T17 composite
Grind P80
112 µm

Recovery

Recovery
36.5 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.14
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Flotation recovery of 36.5% for Test T17 at 112 µm grind size.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“36.5 %”

Context: 112

gravity concentrationTrue North · goldRecovery: 65.9 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
gravity concentration
Processing Route
gravity, flotation
Sample
Test T18 composite
Grind P80
112 µm

Recovery

Recovery
65.9 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.07
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Gravity recovery of 65.9% for Test T18 at 112 µm grind size, indicating very good free gold liberation.

Positive factors

  • High gravity recovery component

Negative factors

  • Testing limited to single composite sample

Evidence · table

“65.9 %”

Context: 112

flotationTrue North · goldRecovery: 30.3 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
flotation
Processing Route
gravity, flotation
Sample
Test T18 composite
Grind P80
112 µm

Recovery

Recovery
30.3 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.07
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Flotation recovery of 30.3% for Test T18 at 112 µm grind size.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“30.3 %”

Context: 112

gravity concentrationTrue North · goldRecovery: 52.7 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
gravity concentration
Processing Route
gravity, flotation
Sample
Test T19 composite
Grind P80
112 µm

Recovery

Recovery
52.7 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.11
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Gravity recovery of 52.7% for Test T19 at 112 µm grind size.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“52.7 %”

Context: 112

flotationTrue North · goldRecovery: 41.3 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
flotation
Processing Route
gravity, flotation
Sample
Test T19 composite
Grind P80
112 µm

Recovery

Recovery
41.3 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.11
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Flotation recovery of 41.3% for Test T19 at 112 µm grind size.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“41.3 %”

Context: 112

gravity concentrationTrue North · goldRecovery: 49.3 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
gravity concentration
Processing Route
gravity, flotation
Sample
Test T20 composite
Grind P80
112 µm

Recovery

Recovery
49.3 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.11
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Gravity recovery of 49.3% for Test T20 at 112 µm grind size.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“49.3 %”

Context: 112

flotationTrue North · goldRecovery: 44.7 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
flotation
Processing Route
gravity, flotation
Sample
Test T20 composite
Grind P80
112 µm

Recovery

Recovery
44.7 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.11
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Flotation recovery of 44.7% for Test T20 at 112 µm grind size.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“44.7 %”

Context: 112

gravity concentrationTrue North · goldRecovery: 50.7 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
gravity concentration
Processing Route
gravity, flotation
Sample
Test T21 composite
Grind P80
112 µm

Recovery

Recovery
50.7 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.08
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Gravity recovery of 50.7% for Test T21 at 112 µm grind size.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“50.7 %”

Context: 112

flotationTrue North · goldRecovery: 44.9 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
flotation
Processing Route
gravity, flotation
Sample
Test T21 composite
Grind P80
112 µm

Recovery

Recovery
44.9 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.08
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Flotation recovery of 44.9% for Test T21 at 112 µm grind size.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“44.9 %”

Context: 112

gravity concentrationTrue North · goldRecovery: 61.1 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
gravity concentration
Processing Route
gravity, flotation
Sample
Test T3 composite
Grind P80
87 µm

Recovery

Recovery
61.1 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.05
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Gravity recovery of 61.1% for Test T3 at 87 µm grind size, indicating very good free gold liberation.

Positive factors

  • High gravity recovery component

Negative factors

  • Testing limited to single composite sample

Evidence · table

“61.1 %”

Context: 87

flotationTrue North · goldRecovery: 36.2 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
flotation
Processing Route
gravity, flotation
Sample
Test T3 composite
Grind P80
87 µm

Recovery

Recovery
36.2 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.05
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Flotation recovery of 36.2% for Test T3 at 87 µm grind size.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“36.2 %”

Context: 87

gravity concentrationTrue North · goldRecovery: 55.1 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
gravity concentration
Processing Route
gravity, flotation
Sample
Test T8 composite
Grind P80
87 µm

Recovery

Recovery
55.1 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.04
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Gravity recovery of 55.1% for Test T8 at 87 µm grind size, indicating good free gold liberation.

Positive factors

  • High gravity recovery component

Negative factors

  • Testing limited to single composite sample

Evidence · table

“55.1 %”

Context: 87

flotationTrue North · goldRecovery: 42.7 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
flotation
Processing Route
gravity, flotation
Sample
Test T8 composite
Grind P80
87 µm

Recovery

Recovery
42.7 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.04
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Flotation recovery of 42.7% for Test T8 at 87 µm grind size.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“42.7 %”

Context: 87

gravity concentrationTrue North · goldRecovery: 49.3 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
gravity concentration
Processing Route
gravity, flotation
Sample
Test T9 composite
Grind P80
87 µm

Recovery

Recovery
49.3 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.09
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Gravity recovery of 49.3% for Test T9 at 87 µm grind size.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“49.3 %”

Context: 87

flotationTrue North · goldRecovery: 45.8 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
flotation
Processing Route
gravity, flotation
Sample
Test T9 composite
Grind P80
87 µm

Recovery

Recovery
45.8 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.09
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Flotation recovery of 45.8% for Test T9 at 87 µm grind size.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“45.8 %”

Context: 87

gravity concentrationTrue North · goldRecovery: 51 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
gravity concentration
Processing Route
gravity, flotation
Sample
Average composite

Recovery

Recovery
51 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.08
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Average gravity recovery of 51.0% for True North, indicating a significant free gold component across various grind sizes.

Positive factors

  • High gravity recovery component

Negative factors

  • Testing limited to single composite sample

Evidence · table

“51.0 %”

Context: Average

flotationTrue North · goldRecovery: 44.5 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
flotation
Processing Route
gravity, flotation
Sample
Average composite

Recovery

Recovery
44.5 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t
Tailings Grade
0.08
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Average flotation recovery of 44.5% for True North, contributing significantly to overall gold recovery.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“44.5 %”

Context: Average

cyanide leach (flotation concentrate)True North · goldRecovery: 93.1 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
cyanide leach (flotation concentrate)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T10 composite
Grind P80
147 µm

Recovery

Recovery
93.1 %
Recovery Basis
actual_test

Reagents

Cyanide
1.6 kg/t
Lime
2.8 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Leach recovery of 93.1% for Test T10 (flotation concentrate) at 147 µm primary grind and 21 µm regrind, with moderate reagent consumption.

Positive factors

  • High leach recovery
  • Moderate reagent consumption

Negative factors

  • Testing limited to single composite sample

Evidence · table

“93.1 %”

Context: T10

total recovery (gravity + flotation + leach)True North · goldRecovery: 91.8 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T10 composite
Grind P80
147 µm

Recovery

Recovery
91.8 %
Recovery Basis
actual_test

Reagents

Cyanide
1.6 kg/t
Lime
2.8 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 91.8% for Test T10 (gravity + flotation + leach) at 147 µm primary grind and 21 µm regrind, with moderate reagent consumption.

Positive factors

  • High Recovery
  • Moderate reagent consumption

Negative factors

  • Testing limited to single composite sample

Evidence · table

“91.8 %”

Context: T10

cyanide leach (flotation concentrate)True North · goldRecovery: 84.5 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
cyanide leach (flotation concentrate)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T11 composite
Grind P80
147 µm

Recovery

Recovery
84.5 %
Recovery Basis
actual_test

Reagents

Cyanide
2 kg/t
Lime
1.5 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Leach recovery of 84.5% for Test T11 (flotation concentrate) at 147 µm primary grind without regrind, with moderate reagent consumption.

Positive factors

  • Moderate reagent consumption

Negative factors

  • Lower leach recovery without regrind
  • Testing limited to single composite sample

Evidence · table

“84.5 %”

Context: T11

total recovery (gravity + flotation + leach)True North · goldRecovery: 85.5 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T11 composite
Grind P80
147 µm

Recovery

Recovery
85.5 %
Recovery Basis
actual_test

Reagents

Cyanide
2 kg/t
Lime
1.5 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 85.5% for Test T11 (gravity + flotation + leach) at 147 µm primary grind without regrind, with moderate reagent consumption.

Positive factors

  • Moderate reagent consumption

Negative factors

  • Lower total recovery without regrind
  • Testing limited to single composite sample

Evidence · table

“85.5 %”

Context: T11

cyanide leach (flotation concentrate)True North · goldRecovery: 93.9 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
cyanide leach (flotation concentrate)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T12 composite
Grind P80
112 µm

Recovery

Recovery
93.9 %
Recovery Basis
actual_test

Reagents

Cyanide
1.9 kg/t
Lime
1.3 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Leach recovery of 93.9% for Test T12 (flotation concentrate) at 112 µm primary grind and 22 µm regrind, with moderate reagent consumption.

Positive factors

  • High leach recovery
  • Moderate reagent consumption

Negative factors

  • Testing limited to single composite sample

Evidence · table

“93.9 %”

Context: T12

total recovery (gravity + flotation + leach)True North · goldRecovery: 93.8 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T12 composite
Grind P80
112 µm

Recovery

Recovery
93.8 %
Recovery Basis
actual_test

Reagents

Cyanide
1.9 kg/t
Lime
1.3 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 93.8% for Test T12 (gravity + flotation + leach) at 112 µm primary grind and 22 µm regrind, with moderate reagent consumption.

Positive factors

  • High Recovery
  • Moderate reagent consumption

Negative factors

  • Testing limited to single composite sample

Evidence · table

“93.8 %”

Context: T12

cyanide leach (flotation concentrate)True North · goldRecovery: 82.3 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
cyanide leach (flotation concentrate)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T13 composite
Grind P80
112 µm

Recovery

Recovery
82.3 %
Recovery Basis
actual_test

Reagents

Cyanide
1.9 kg/t
Lime
1.3 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Leach recovery of 82.3% for Test T13 (flotation concentrate) at 112 µm primary grind without regrind, with moderate reagent consumption.

Positive factors

  • Moderate reagent consumption

Negative factors

  • Lower leach recovery without regrind
  • Testing limited to single composite sample

Evidence · table

“82.3 %”

Context: T13

total recovery (gravity + flotation + leach)True North · goldRecovery: 88.3 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T13 composite
Grind P80
112 µm

Recovery

Recovery
88.3 %
Recovery Basis
actual_test

Reagents

Cyanide
1.9 kg/t
Lime
1.3 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 88.3% for Test T13 (gravity + flotation + leach) at 112 µm primary grind without regrind, with moderate reagent consumption.

Positive factors

  • Moderate reagent consumption

Negative factors

  • Lower total recovery without regrind
  • Testing limited to single composite sample

Evidence · table

“88.3 %”

Context: T13

cyanide leach (flotation concentrate)True North · goldRecovery: 91.8 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
cyanide leach (flotation concentrate)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T22 composite
Grind P80
112 µm

Recovery

Recovery
91.8 %
Recovery Basis
actual_test

Reagents

Cyanide
0.7 kg/t
Lime
1.7 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Leach recovery of 91.8% for Test T22 (flotation concentrate) at 112 µm primary grind and 21 µm regrind, with low cyanide consumption.

Positive factors

  • High leach recovery
  • Low reagent consumption

Negative factors

  • Testing limited to single composite sample

Evidence · table

“91.8 %”

Context: T22

total recovery (gravity + flotation + leach)True North · goldRecovery: 92.8 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T22 composite
Grind P80
112 µm

Recovery

Recovery
92.8 %
Recovery Basis
actual_test

Reagents

Cyanide
0.7 kg/t
Lime
1.7 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 92.8% for Test T22 (gravity + flotation + leach) at 112 µm primary grind and 21 µm regrind, with low cyanide consumption.

Positive factors

  • High Recovery
  • Low reagent consumption

Negative factors

  • Testing limited to single composite sample

Evidence · table

“92.8 %”

Context: T22

cyanide leach (flotation concentrate)True North · goldRecovery: 93.9 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
cyanide leach (flotation concentrate)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T23 composite
Grind P80
112 µm

Recovery

Recovery
93.9 %
Recovery Basis
actual_test

Reagents

Cyanide
0.9 kg/t
Lime
7.5 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Leach recovery of 93.9% for Test T23 (flotation concentrate) at 112 µm primary grind and 22 µm regrind, with moderate reagent consumption.

Positive factors

  • High leach recovery
  • Moderate reagent consumption

Negative factors

  • Testing limited to single composite sample

Evidence · table

“93.9 %”

Context: T23

total recovery (gravity + flotation + leach)True North · goldRecovery: 93.8 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T23 composite
Grind P80
112 µm

Recovery

Recovery
93.8 %
Recovery Basis
actual_test

Reagents

Cyanide
0.9 kg/t
Lime
7.5 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 93.8% for Test T23 (gravity + flotation + leach) at 112 µm primary grind and 22 µm regrind, with moderate reagent consumption.

Positive factors

  • High Recovery
  • Moderate reagent consumption

Negative factors

  • Testing limited to single composite sample

Evidence · table

“93.8 %”

Context: T23

cyanide leach (flotation concentrate)True North · goldRecovery: 94.3 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
cyanide leach (flotation concentrate)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T24 composite
Grind P80
112 µm

Recovery

Recovery
94.3 %
Recovery Basis
actual_test

Reagents

Cyanide
1.1 kg/t
Lime
1.7 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Leach recovery of 94.3% for Test T24 (flotation concentrate) at 112 µm primary grind and 21 µm regrind, with moderate reagent consumption.

Positive factors

  • High leach recovery
  • Moderate reagent consumption

Negative factors

  • Testing limited to single composite sample

Evidence · table

“94.3 %”

Context: T24

total recovery (gravity + flotation + leach)True North · goldRecovery: 94 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T24 composite
Grind P80
112 µm

Recovery

Recovery
94 %
Recovery Basis
actual_test

Reagents

Cyanide
1.1 kg/t
Lime
1.7 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 94.0% for Test T24 (gravity + flotation + leach) at 112 µm primary grind and 21 µm regrind, with moderate reagent consumption.

Positive factors

  • High Recovery
  • Moderate reagent consumption

Negative factors

  • Testing limited to single composite sample

Evidence · table

“94.0 %”

Context: T24

cyanide leach (flotation concentrate)True North · goldRecovery: 93.4 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
cyanide leach (flotation concentrate)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T25 composite
Grind P80
112 µm

Recovery

Recovery
93.4 %
Recovery Basis
actual_test

Reagents

Cyanide
1 kg/t
Lime
1.3 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Leach recovery of 93.4% for Test T25 (flotation concentrate) at 112 µm primary grind and 24 µm regrind, with moderate reagent consumption.

Positive factors

  • High leach recovery
  • Moderate reagent consumption

Negative factors

  • Testing limited to single composite sample

Evidence · table

“93.4 %”

Context: T25

total recovery (gravity + flotation + leach)True North · goldRecovery: 93.6 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T25 composite
Grind P80
112 µm

Recovery

Recovery
93.6 %
Recovery Basis
actual_test

Reagents

Cyanide
1 kg/t
Lime
1.3 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 93.6% for Test T25 (gravity + flotation + leach) at 112 µm primary grind and 24 µm regrind, with moderate reagent consumption.

Positive factors

  • High Recovery
  • Moderate reagent consumption

Negative factors

  • Testing limited to single composite sample

Evidence · table

“93.6 %”

Context: T25

cyanide leach (flotation concentrate)True North · goldRecovery: 93.7 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
cyanide leach (flotation concentrate)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T26 composite
Grind P80
112 µm

Recovery

Recovery
93.7 %
Recovery Basis
actual_test

Reagents

Cyanide
0.5 kg/t
Lime
8.3 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Leach recovery of 93.7% for Test T26 (flotation concentrate) at 112 µm primary grind and 23 µm regrind, with low cyanide consumption.

Positive factors

  • High leach recovery
  • Low reagent consumption

Negative factors

  • Testing limited to single composite sample

Evidence · table

“93.7 %”

Context: T26

total recovery (gravity + flotation + leach)True North · goldRecovery: 93.7 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T26 composite
Grind P80
112 µm

Recovery

Recovery
93.7 %
Recovery Basis
actual_test

Reagents

Cyanide
0.5 kg/t
Lime
8.3 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 93.7% for Test T26 (gravity + flotation + leach) at 112 µm primary grind and 23 µm regrind, with low cyanide consumption.

Positive factors

  • High Recovery
  • Low reagent consumption

Negative factors

  • Testing limited to single composite sample

Evidence · table

“93.7 %”

Context: T26

cyanide leach (flotation concentrate)True North · goldRecovery: 93 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
cyanide leach (flotation concentrate)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T27 composite
Grind P80
112 µm

Recovery

Recovery
93 %
Recovery Basis
actual_test

Reagents

Cyanide
1 kg/t
Lime
1.2 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Leach recovery of 93.0% for Test T27 (flotation concentrate) at 112 µm primary grind and 26 µm regrind, with moderate reagent consumption.

Positive factors

  • High leach recovery
  • Moderate reagent consumption

Negative factors

  • Testing limited to single composite sample

Evidence · table

“93.0 %”

Context: T27

total recovery (gravity + flotation + leach)True North · goldRecovery: 93.4 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T27 composite
Grind P80
112 µm

Recovery

Recovery
93.4 %
Recovery Basis
actual_test

Reagents

Cyanide
1 kg/t
Lime
1.2 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 93.4% for Test T27 (gravity + flotation + leach) at 112 µm primary grind and 26 µm regrind, with moderate reagent consumption.

Positive factors

  • High Recovery
  • Moderate reagent consumption

Negative factors

  • Testing limited to single composite sample

Evidence · table

“93.4 %”

Context: T27

cyanide leach (flotation concentrate)True North · goldRecovery: 92.3 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
cyanide leach (flotation concentrate)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T14 composite
Grind P80
87 µm

Recovery

Recovery
92.3 %
Recovery Basis
actual_test

Reagents

Cyanide
1.8 kg/t
Lime
1.2 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Leach recovery of 92.3% for Test T14 (flotation concentrate) at 87 µm primary grind and 21 µm regrind, with moderate reagent consumption.

Positive factors

  • High leach recovery
  • Moderate reagent consumption

Negative factors

  • Testing limited to single composite sample

Evidence · table

“92.3 %”

Context: T14

total recovery (gravity + flotation + leach)True North · goldRecovery: 94.5 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T14 composite
Grind P80
87 µm

Recovery

Recovery
94.5 %
Recovery Basis
actual_test

Reagents

Cyanide
1.8 kg/t
Lime
1.2 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 94.5% for Test T14 (gravity + flotation + leach) at 87 µm primary grind and 21 µm regrind, with moderate reagent consumption.

Positive factors

  • High Recovery
  • Moderate reagent consumption

Negative factors

  • Testing limited to single composite sample

Evidence · table

“94.5 %”

Context: T14

cyanide leach (flotation concentrate)True North · goldRecovery: 96.6 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
cyanide leach (flotation concentrate)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T15 composite
Grind P80
87 µm

Recovery

Recovery
96.6 %
Recovery Basis
actual_test

Reagents

Cyanide
1.7 kg/t
Lime
1 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Leach recovery of 96.6% for Test T15 (flotation concentrate) at 87 µm primary grind without regrind, with moderate reagent consumption.

Positive factors

  • High leach recovery
  • Moderate reagent consumption

Negative factors

  • Testing limited to single composite sample

Evidence · table

“96.6 %”

Context: T15

total recovery (gravity + flotation + leach)True North · goldRecovery: 96.3 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T15 composite
Grind P80
87 µm

Recovery

Recovery
96.3 %
Recovery Basis
actual_test

Reagents

Cyanide
1.7 kg/t
Lime
1 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 96.3% for Test T15 (gravity + flotation + leach) at 87 µm primary grind without regrind, with moderate reagent consumption.

Positive factors

  • High Recovery
  • Moderate reagent consumption

Negative factors

  • Testing limited to single composite sample

Evidence · table

“96.3 %”

Context: T15

total recovery (gravity + flotation + leach)True North · goldRecovery: 87.5 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
Gravity Float Leach
Sample
Primary Grind 147 µm with Gravity Float Leach
Grind P80
147 µm

Recovery

Recovery
87.5 %
Recovery Basis
actual_test

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 87.5% for True North with 147 µm primary grind using gravity-flotation-leach method.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“87.5 %”

Context: 147

total recovery (gravity + flotation + leach)True North · goldRecovery: 92.6 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
Gravity Float Leach Regrind
Sample
Primary Grind 147 µm with Gravity Float Leach Regrind
Grind P80
147 µm

Recovery

Recovery
92.6 %
Recovery Basis
actual_test

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 92.6% for True North with 147 µm primary grind and regrind, showing a 5.1% increase from non-regrind scenario.

Positive factors

  • High Recovery
  • Recovery Improving

Negative factors

  • Testing limited to single composite sample

Evidence · table

“92.6 %”

Context: 147

total recovery (gravity + flotation + leach)True North · goldRecovery: 85.6 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
Gravity Float Leach
Sample
Primary Grind 112 µm with Gravity Float Leach
Grind P80
112 µm

Recovery

Recovery
85.6 %
Recovery Basis
actual_test

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 85.6% for True North with 112 µm primary grind using gravity-flotation-leach method.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“85.6 %”

Context: 112

total recovery (gravity + flotation + leach)True North · goldRecovery: 93.6 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
Gravity Float Leach Regrind
Sample
Primary Grind 112 µm with Gravity Float Leach Regrind
Grind P80
112 µm

Recovery

Recovery
93.6 %
Recovery Basis
actual_test

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 93.6% for True North with 112 µm primary grind and regrind, showing an 8.0% increase from non-regrind scenario.

Positive factors

  • High Recovery
  • Recovery Improving

Negative factors

  • Testing limited to single composite sample

Evidence · table

“93.6 %”

Context: 112

total recovery (gravity + flotation + leach)True North · goldRecovery: 92.7 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
Gravity Float Leach
Sample
Primary Grind 87 µm with Gravity Float Leach
Grind P80
87 µm

Recovery

Recovery
92.7 %
Recovery Basis
actual_test

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 92.7% for True North with 87 µm primary grind using gravity-flotation-leach method.

Positive factors

  • High Recovery

Negative factors

  • Testing limited to single composite sample

Evidence · table

“92.7 %”

Context: 87

total recovery (gravity + flotation + leach)True North · goldRecovery: 94.6 %View all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
Gravity Float Leach Regrind
Sample
Primary Grind 87 µm with Gravity Float Leach Regrind
Grind P80
87 µm

Recovery

Recovery
94.6 %
Recovery Basis
actual_test

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 94.6% for True North with 87 µm primary grind and regrind, showing a 1.9% increase from non-regrind scenario.

Positive factors

  • High Recovery
  • Recovery Improving

Negative factors

  • Testing limited to single composite sample

Evidence · table

“94.6 %”

Context: 87

total recovery (gravity + flotation + leach)True North · goldRecovery: 92.7 %Head Grade: 1.51Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T4, T10 composite
Grind P80
147 µm

Recovery

Recovery
92.7 %
Recovery Basis
actual_test
Head Grade
1.51
Head Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 92.7% for Test T4, T10 at 147 µm primary grind and 21 µm regrind.

Positive factors

  • High Recovery

Negative factors

  • Testing limited to single composite sample

Evidence · table

“92.7”

Context: T4, T10

total recovery (gravity + flotation + leach)True North · goldRecovery: 86.3 %Head Grade: 1.6Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T5, T11 composite
Grind P80
147 µm

Recovery

Recovery
86.3 %
Recovery Basis
actual_test
Head Grade
1.6
Head Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 86.3% for Test T5, T11 at 147 µm primary grind without regrind.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“86.3”

Context: T5, T11

total recovery (gravity + flotation + leach)True North · goldRecovery: 93.7 %Head Grade: 1.66Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T6, T12 composite
Grind P80
112 µm

Recovery

Recovery
93.7 %
Recovery Basis
actual_test
Head Grade
1.66
Head Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 93.7% for Test T6, T12 at 112 µm primary grind and 22 µm regrind.

Positive factors

  • High Recovery

Negative factors

  • Testing limited to single composite sample

Evidence · table

“93.7”

Context: T6, T12

total recovery (gravity + flotation + leach)True North · goldRecovery: 85.6 %Head Grade: 1.59Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T7, T13 composite
Grind P80
112 µm

Recovery

Recovery
85.6 %
Recovery Basis
actual_test
Head Grade
1.59
Head Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 85.6% for Test T7, T13 at 112 µm primary grind without regrind.

Negative factors

  • Testing limited to single composite sample

Evidence · table

“85.6”

Context: T7, T13

total recovery (gravity + flotation + leach)True North · goldRecovery: 94.7 %Head Grade: 1.82Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T8, T14 composite
Grind P80
87 µm

Recovery

Recovery
94.7 %
Recovery Basis
actual_test
Head Grade
1.82
Head Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 94.7% for Test T8, T14 at 87 µm primary grind and 26 µm regrind.

Positive factors

  • High Recovery

Negative factors

  • Testing limited to single composite sample

Evidence · table

“94.7”

Context: T8, T14

total recovery (gravity + flotation + leach)True North · goldRecovery: 92.7 %Head Grade: 1.46Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
True North
Commodity
gold
Ticker
AUMB

Test Work

Program Status
optimization
Test Type
total recovery (gravity + flotation + leach)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test T9, T15 composite
Grind P80
87 µm

Recovery

Recovery
92.7 %
Recovery Basis
actual_test
Head Grade
1.46
Head Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 92.7% for Test T9, T15 at 87 µm primary grind without regrind.

Positive factors

  • High Recovery

Negative factors

  • Testing limited to single composite sample

Evidence · table

“92.7”

Context: T9, T15

gravity concentrationOgama-Rockland · goldRecovery: 82 %Head Grade: 4.65Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
Ogama-Rockland
Commodity
gold
Ticker
AUMB

Test Work

Program Status
preliminary
Test Type
gravity concentration
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test 7885-03 composite
Grind P80
101 µm

Recovery

Recovery
82 %
Recovery Basis
actual_test
Head Grade
4.65
Head Grade Unit
g/t
Tailings Grade
0.17
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Gravity recovery of 82.0% for Test 7885-03 at 101 µm grind size, indicating a very high free gold component for Ogama-Rockland.

Positive factors

  • High gravity recovery component

Negative factors

  • Preliminary test work
  • Testing limited to single composite sample

Evidence · table

“82.0 %”

Context: 7885-03

flotationOgama-Rockland · goldRecovery: 15 %Head Grade: 4.65Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
Ogama-Rockland
Commodity
gold
Ticker
AUMB

Test Work

Program Status
preliminary
Test Type
flotation
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test 7885-03 composite
Grind P80
101 µm

Recovery

Recovery
15 %
Recovery Basis
actual_test
Head Grade
4.65
Head Grade Unit
g/t
Tailings Grade
0.17
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Flotation recovery of 15.0% for Test 7885-03 at 101 µm grind size, contributing to overall gold recovery for Ogama-Rockland.

Negative factors

  • Preliminary test work
  • Testing limited to single composite sample

Evidence · table

“15 %”

Context: 7885-03

cyanide leach (flotation concentrate)Ogama-Rockland · goldRecovery: 97.7 %Head Grade: 4.65Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
Ogama-Rockland
Commodity
gold
Ticker
AUMB

Test Work

Program Status
preliminary
Test Type
cyanide leach (flotation concentrate)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test 7885-03 composite
Grind P80
101 µm

Recovery

Recovery
97.7 %
Recovery Basis
actual_test
Head Grade
4.65
Head Grade Unit
g/t
Tailings Grade
0.17
Tailings Grade Unit
g/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Leach recovery of 97.7% for Test 7885-03 (flotation concentrate) at 101 µm grind size, indicating excellent amenability to cyanidation for Ogama-Rockland.

Positive factors

  • High leach recovery

Negative factors

  • Preliminary test work
  • Testing limited to single composite sample

Evidence · table

“97.7 %”

Context: 7885-03

total recovery (gravity + flotation + leach)Ogama-Rockland · goldRecovery: 96.3 %Head Grade: 4.65Head Grade Unit: g/tView all details
Link to this fact

Identity

Project
Ogama-Rockland
Commodity
gold
Ticker
AUMB

Test Work

Program Status
preliminary
Test Type
total recovery (gravity + flotation + leach)
Processing Route
gravity, flotation, regrind, cyanide leach
Sample
Test 7885-03 composite
Grind P80
101 µm

Recovery

Recovery
96.3 %
Recovery Basis
actual_test
Head Grade
4.65
Head Grade Unit
g/t
Tailings Grade
0.17
Tailings Grade Unit
g/t

Reagents

Cyanide
6.4 kg/t
Lime
1.7 kg/t

Lab

Laboratory
ALS Canada Ltd. (Metallurgy Services)

Review

Needs Review
No
Historical
No

Dates

Event date
2026-08-20T00:00:00.000Z

Reasoning: Total gold recovery of 96.3% for Test 7885-03 (gravity + flotation + leach) at 101 µm primary grind and 21 µm regrind, with moderate reagent consumption for Ogama-Rockland.

Positive factors

  • High Recovery
  • Moderate reagent consumption

Negative factors

  • Preliminary test work
  • Testing limited to single composite sample

Evidence · table

“96.3 %”

Context: 7885-03

How Atlas produces this analysis

Minestarters Atlas uses automated extraction to summarize mining announcements, identify reported measurements, and classify supporting evidence. Sentiment reflects the extracted narrative and classification rules; it is an interpretation, not a reported measurement. Evidence quotes and context are provided where available. Missing data, low-confidence results, and review flags indicate limitations. Check the original publisher announcement before relying on an interpretation.