# Aldebaran and Centauri Announce Significant Increase in Mineral Resources for the Rio Grande Gold-Copper Project in Salta, Argentina

Canonical Atlas analysis: https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1

Original source: https://money.tmx.com/en/quote/ALDE/news/7644317711461551/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th

Publisher: tmx

Original announcement: 2026-03-02T12:00:00.000Z

Analysis by Minestarters Atlas

Atlas analysis published: Unknown date

Atlas analysis updated: Unknown date

- Company: Aldebaran Resources Inc.

- Ticker: ALDE

- Exchange: TSX

- Region: Salta, Argentina

- Primary commodity: Gold

- Secondary commodities: Copper, Silver

- Document categories: Resource update, Agreement transaction

- Extracted: 2026-09-13 11:14:27 UTC

Narrative sentiment: 0.60 · Bullish

## Minestarters Atlas summary

Aldebaran and Centauri have announced an updated Mineral Resource Estimate for the Rio Grande gold-copper project in Argentina, totaling 153.7 Mt of Indicated and 220.8 Mt of Inferred resources. The update is based on historical data and was prepared by SLR Consulting to support Centauri's upcoming public listing.

Reasoning: The announcement reports a substantial mineral resource update for the Rio Grande project, though it relies on historical data \(last drilling 2012/2013\) rather than new assays.

- Positive factor: Significant increase in mineral resource inventory

- Positive factor: Large scale of Indicated and Inferred resources

- Positive factor: NI 43-101 compliant update

- Positive factor: Proximity to operating Lindero mine

- Negative factor: No new drilling or trenching since 2013

- Negative factor: High proportion of Inferred resources

- Negative factor: Metallurgical recoveries for copper and silver are relatively low/variable

Facts used in scoring: 24

## Classification and evidence

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: The resource estimate was prepared as a National Instrument 43-101 Technical Report update.

Evidence · text

> complete a National Instrument \(“NI”\) 43-101 Technical Report and Mineral Resource Estimate update

**QP/CP Signed**

Polarity: positive

Definition: 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: Mr. Benjamin Sanfurgo, an independent qualified person, has reviewed and approved the technical information.

Evidence · text

> Mr. Sanfurgo is an independent qualified person \(“QP”\) as defined by NI 43-101.

**Inferred Resource**

Polarity: negative

Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.

Why it applies: A significant portion of the resource \(220.8 Mt\) is classified as Inferred.

Evidence · table

> 220.8

Context: Inferred

## Extracted facts

Stored fact records: 24. Some facts used in scoring do not have a stored record.

## Resource Estimates (24)

### indicated

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-0)

Rio Grande · gold

#### Identity

- Project: Rio Grande
- Commodity: gold
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:bc6fd8474d51344cf7d6
- Deposit or zone: Oxide
- Mining method: open\_pit
- Material type: oxide
- Resource basis: gross

#### Resource Data

- Category: indicated
- Tonnes: 94100000
- Grade: 0.26
- Grade Unit: g/t
- Contained Metal: 781
- Contained Unit: koz
- Cutoff Grade: 10.25
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard indicated oxide resource component.

Evidence · table

> 0.26

Context: 94.1

#### Tags used in scoring

**Indicated Resource**

Polarity: positive

Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.

Why it applies: category is "indicated"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

### indicated

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-1)

Rio Grande · copper

#### Identity

- Project: Rio Grande
- Commodity: copper
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:bc6fd8474d51344cf7d6
- Deposit or zone: Oxide
- Mining method: open\_pit
- Material type: oxide
- Resource basis: gross

#### Resource Data

- Category: indicated
- Tonnes: 94100000
- Grade: 0.2
- Grade Unit: %
- Contained Metal: 188
- Contained Unit: kt
- Cutoff Grade: 10.25
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard indicated oxide resource component.

Evidence · table

> 0.20

Context: 94.1

#### Tags used in scoring

**Indicated Resource**

Polarity: positive

Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.

Why it applies: category is "indicated"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

### indicated

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-2)

Rio Grande · silver

#### Identity

- Project: Rio Grande
- Commodity: silver
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:bc6fd8474d51344cf7d6
- Deposit or zone: Oxide
- Mining method: open\_pit
- Material type: oxide
- Resource basis: gross

#### Resource Data

- Category: indicated
- Tonnes: 94100000
- Grade: 6.3
- Grade Unit: moz
- Cutoff Grade: 10.25
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard indicated oxide resource component.

Evidence · table

> 6.3

Context: 94.1

#### Tags used in scoring

**Indicated Resource**

Polarity: positive

Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.

Why it applies: category is "indicated"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**No Contained Metal**

Polarity: negative

Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.

Why it applies: contained\_metal was not reported

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

### indicated

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-3)

Rio Grande · gold

#### Identity

- Project: Rio Grande
- Commodity: gold
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:23fc57c7591dac7d46e2
- Deposit or zone: Transitional
- Mining method: open\_pit
- Material type: transitional
- Resource basis: gross

#### Resource Data

- Category: indicated
- Tonnes: 47300000
- Grade: 0.34
- Grade Unit: g/t
- Contained Metal: 523
- Contained Unit: koz
- Cutoff Grade: 15
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard indicated transitional resource component.

Evidence · table

> 0.34

Context: 47.3

#### Tags used in scoring

**Indicated Resource**

Polarity: positive

Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.

Why it applies: category is "indicated"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

### indicated

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-4)

Rio Grande · copper

#### Identity

- Project: Rio Grande
- Commodity: copper
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:23fc57c7591dac7d46e2
- Deposit or zone: Transitional
- Mining method: open\_pit
- Material type: transitional
- Resource basis: gross

#### Resource Data

- Category: indicated
- Tonnes: 47300000
- Grade: 0.33
- Grade Unit: %
- Contained Metal: 156
- Contained Unit: kt
- Cutoff Grade: 15
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard indicated transitional resource component.

Evidence · table

> 0.33

Context: 47.3

#### Tags used in scoring

**Indicated Resource**

Polarity: positive

Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.

Why it applies: category is "indicated"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

### indicated

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-5)

Rio Grande · silver

#### Identity

- Project: Rio Grande
- Commodity: silver
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:23fc57c7591dac7d46e2
- Deposit or zone: Transitional
- Mining method: open\_pit
- Material type: transitional
- Resource basis: gross

#### Resource Data

- Category: indicated
- Tonnes: 47300000
- Grade: 5.5
- Grade Unit: moz
- Cutoff Grade: 15
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard indicated transitional resource component.

Evidence · table

> 5.5

Context: 47.3

#### Tags used in scoring

**Indicated Resource**

Polarity: positive

Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.

Why it applies: category is "indicated"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**No Contained Metal**

Polarity: negative

Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.

Why it applies: contained\_metal was not reported

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

### indicated

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-6)

Rio Grande · gold

#### Identity

- Project: Rio Grande
- Commodity: gold
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:285d1560af6c65c7e059
- Deposit or zone: Sulphide
- Mining method: open\_pit
- Material type: sulphide
- Resource basis: gross

#### Resource Data

- Category: indicated
- Tonnes: 12300000
- Grade: 0.36
- Grade Unit: g/t
- Contained Metal: 144
- Contained Unit: koz
- Cutoff Grade: 9.5
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard indicated sulphide resource component.

Evidence · table

> 0.36

Context: 12.3

#### Tags used in scoring

**Indicated Resource**

Polarity: positive

Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.

Why it applies: category is "indicated"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

### indicated

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-7)

Rio Grande · copper

#### Identity

- Project: Rio Grande
- Commodity: copper
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:285d1560af6c65c7e059
- Deposit or zone: Sulphide
- Mining method: open\_pit
- Material type: sulphide
- Resource basis: gross

#### Resource Data

- Category: indicated
- Tonnes: 12300000
- Grade: 0.29
- Grade Unit: %
- Contained Metal: 36
- Contained Unit: kt
- Cutoff Grade: 9.5
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard indicated sulphide resource component.

Evidence · table

> 0.29

Context: 12.3

#### Tags used in scoring

**Indicated Resource**

Polarity: positive

Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.

Why it applies: category is "indicated"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

### indicated

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-8)

Rio Grande · silver

#### Identity

- Project: Rio Grande
- Commodity: silver
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:285d1560af6c65c7e059
- Deposit or zone: Sulphide
- Mining method: open\_pit
- Material type: sulphide
- Resource basis: gross

#### Resource Data

- Category: indicated
- Tonnes: 12300000
- Grade: 0.9
- Grade Unit: moz
- Cutoff Grade: 9.5
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard indicated sulphide resource component.

Evidence · table

> 0.9

Context: 12.3

#### Tags used in scoring

**Indicated Resource**

Polarity: positive

Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.

Why it applies: category is "indicated"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**No Contained Metal**

Polarity: negative

Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.

Why it applies: contained\_metal was not reported

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

### inferred

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-9)

Rio Grande · gold

#### Identity

- Project: Rio Grande
- Commodity: gold
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:3d0479d6be94b0943e98
- Deposit or zone: Oxide
- Mining method: open\_pit
- Material type: oxide
- Resource basis: gross

#### Resource Data

- Category: inferred
- Tonnes: 144500000
- Grade: 0.19
- Grade Unit: g/t
- Contained Metal: 898
- Contained Unit: koz
- Cutoff Grade: 10.25
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard inferred oxide resource component.

Evidence · table

> 0.19

Context: 144.5

#### Tags used in scoring

**Inferred Resource**

Polarity: negative

Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.

Why it applies: category is "inferred"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

### inferred

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-10)

Rio Grande · copper

#### Identity

- Project: Rio Grande
- Commodity: copper
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:3d0479d6be94b0943e98
- Deposit or zone: Oxide
- Mining method: open\_pit
- Material type: oxide
- Resource basis: gross

#### Resource Data

- Category: inferred
- Tonnes: 144500000
- Grade: 0.16
- Grade Unit: %
- Contained Metal: 231
- Contained Unit: kt
- Cutoff Grade: 10.25
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard inferred oxide resource component.

Evidence · table

> 0.16

Context: 144.5

#### Tags used in scoring

**Inferred Resource**

Polarity: negative

Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.

Why it applies: category is "inferred"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

### inferred

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-11)

Rio Grande · silver

#### Identity

- Project: Rio Grande
- Commodity: silver
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:3d0479d6be94b0943e98
- Deposit or zone: Oxide
- Mining method: open\_pit
- Material type: oxide
- Resource basis: gross

#### Resource Data

- Category: inferred
- Tonnes: 144500000
- Grade: 10.3
- Grade Unit: moz
- Cutoff Grade: 10.25
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard inferred oxide resource component.

Evidence · table

> 10.3

Context: 144.5

#### Tags used in scoring

**Inferred Resource**

Polarity: negative

Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.

Why it applies: category is "inferred"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**No Contained Metal**

Polarity: negative

Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.

Why it applies: contained\_metal was not reported

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

### inferred

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-12)

Rio Grande · gold

#### Identity

- Project: Rio Grande
- Commodity: gold
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:db223ea33305faca9d87
- Deposit or zone: Transitional
- Mining method: open\_pit
- Material type: transitional
- Resource basis: gross

#### Resource Data

- Category: inferred
- Tonnes: 75600000
- Grade: 0.26
- Grade Unit: g/t
- Contained Metal: 643
- Contained Unit: koz
- Cutoff Grade: 15
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard inferred transitional resource component.

Evidence · table

> 0.26

Context: 75.6

#### Tags used in scoring

**Inferred Resource**

Polarity: negative

Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.

Why it applies: category is "inferred"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

### inferred

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-13)

Rio Grande · copper

#### Identity

- Project: Rio Grande
- Commodity: copper
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:db223ea33305faca9d87
- Deposit or zone: Transitional
- Mining method: open\_pit
- Material type: transitional
- Resource basis: gross

#### Resource Data

- Category: inferred
- Tonnes: 75600000
- Grade: 0.24
- Grade Unit: %
- Contained Metal: 181
- Contained Unit: kt
- Cutoff Grade: 15
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard inferred transitional resource component.

Evidence · table

> 0.24

Context: 75.6

#### Tags used in scoring

**Inferred Resource**

Polarity: negative

Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.

Why it applies: category is "inferred"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

### inferred

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-14)

Rio Grande · silver

#### Identity

- Project: Rio Grande
- Commodity: silver
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:db223ea33305faca9d87
- Deposit or zone: Transitional
- Mining method: open\_pit
- Material type: transitional
- Resource basis: gross

#### Resource Data

- Category: inferred
- Tonnes: 75600000
- Grade: 7.4
- Grade Unit: moz
- Cutoff Grade: 15
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard inferred transitional resource component.

Evidence · table

> 7.4

Context: 75.6

#### Tags used in scoring

**Inferred Resource**

Polarity: negative

Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.

Why it applies: category is "inferred"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**No Contained Metal**

Polarity: negative

Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.

Why it applies: contained\_metal was not reported

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

### inferred

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-15)

Rio Grande · gold

#### Identity

- Project: Rio Grande
- Commodity: gold
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:d17bbde032aae184cbc2
- Deposit or zone: Sulphide
- Mining method: open\_pit
- Material type: sulphide
- Resource basis: gross

#### Resource Data

- Category: inferred
- Tonnes: 700000
- Grade: 0.25
- Grade Unit: g/t
- Contained Metal: 6
- Contained Unit: koz
- Cutoff Grade: 9.5
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard inferred sulphide resource component.

Evidence · table

> 0.25

Context: 0.7

#### Tags used in scoring

**Inferred Resource**

Polarity: negative

Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.

Why it applies: category is "inferred"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

### inferred

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-16)

Rio Grande · copper

#### Identity

- Project: Rio Grande
- Commodity: copper
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:d17bbde032aae184cbc2
- Deposit or zone: Sulphide
- Mining method: open\_pit
- Material type: sulphide
- Resource basis: gross

#### Resource Data

- Category: inferred
- Tonnes: 700000
- Grade: 0.24
- Grade Unit: %
- Contained Metal: 2
- Contained Unit: kt
- Cutoff Grade: 9.5
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard inferred sulphide resource component.

Evidence · table

> 0.24

Context: 0.7

#### Tags used in scoring

**Inferred Resource**

Polarity: negative

Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.

Why it applies: category is "inferred"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

### inferred

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-17)

Rio Grande · silver

#### Identity

- Project: Rio Grande
- Commodity: silver
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:d17bbde032aae184cbc2
- Deposit or zone: Sulphide
- Mining method: open\_pit
- Material type: sulphide
- Resource basis: gross

#### Resource Data

- Category: inferred
- Tonnes: 700000
- Grade: 0.1
- Grade Unit: moz
- Cutoff Grade: 9.5
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard inferred sulphide resource component.

Evidence · table

> 0.1

Context: 0.7

#### Tags used in scoring

**Inferred Resource**

Polarity: negative

Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.

Why it applies: category is "inferred"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**No Contained Metal**

Polarity: negative

Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.

Why it applies: contained\_metal was not reported

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

### indicated

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-18)

Rio Grande · gold

#### Identity

- Project: Rio Grande
- Commodity: gold
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:71798213c75fa10a8df8
- Deposit or zone: Oxide
- Mining method: open\_pit
- Material type: Indicated
- Resource basis: gross

#### Resource Data

- Category: indicated
- Tonnes: 153700000
- Grade: 0.29
- Grade Unit: g/t
- Contained Metal: 1448
- Contained Unit: koz
- Cutoff Grade: 10.25
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard indicated oxide resource component. \(Expanded from multi-commodity resource table for completeness.\)

Evidence · table

> 0.29

Context: 153.7

#### Tags used in scoring

**Indicated Resource**

Polarity: positive

Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.

Why it applies: category is "indicated"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

### indicated

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-19)

Rio Grande · copper

#### Identity

- Project: Rio Grande
- Commodity: copper
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:71798213c75fa10a8df8
- Deposit or zone: Oxide
- Mining method: open\_pit
- Material type: Indicated
- Resource basis: gross

#### Resource Data

- Category: indicated
- Tonnes: 153700000
- Grade: 0.25
- Grade Unit: %
- Contained Metal: 384
- Contained Unit: kt
- Cutoff Grade: 10.25
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard indicated oxide resource component. \(Expanded from multi-commodity resource table for completeness.\)

Evidence · table

> 0.25

Context: 153.7

#### Tags used in scoring

**Indicated Resource**

Polarity: positive

Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.

Why it applies: category is "indicated"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

### indicated

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-20)

Rio Grande · silver

#### Identity

- Project: Rio Grande
- Commodity: silver
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:71798213c75fa10a8df8
- Deposit or zone: Oxide
- Mining method: open\_pit
- Material type: Indicated
- Resource basis: gross

#### Resource Data

- Category: indicated
- Tonnes: 153700000
- Grade: 12.7
- Grade Unit: moz
- Cutoff Grade: 10.25
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard indicated oxide resource component. \(Expanded from multi-commodity resource table for completeness.\)

Evidence · table

> 12.7

Context: 153.7

#### Tags used in scoring

**Indicated Resource**

Polarity: positive

Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.

Why it applies: category is "indicated"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**No Contained Metal**

Polarity: negative

Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.

Why it applies: contained\_metal was not reported

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

### inferred

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-21)

Rio Grande · gold

#### Identity

- Project: Rio Grande
- Commodity: gold
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:8119c7a2eac3aa96f3ed
- Deposit or zone: Oxide
- Mining method: open\_pit
- Material type: Inferred
- Resource basis: gross

#### Resource Data

- Category: inferred
- Tonnes: 220800000
- Grade: 0.22
- Grade Unit: g/t
- Contained Metal: 1547
- Contained Unit: koz
- Cutoff Grade: 10.25
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard inferred oxide resource component. \(Expanded from multi-commodity resource table for completeness.\)

Evidence · table

> 0.22

Context: 220.8

#### Tags used in scoring

**Inferred Resource**

Polarity: negative

Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.

Why it applies: category is "inferred"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

### inferred

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-22)

Rio Grande · copper

#### Identity

- Project: Rio Grande
- Commodity: copper
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:8119c7a2eac3aa96f3ed
- Deposit or zone: Oxide
- Mining method: open\_pit
- Material type: Inferred
- Resource basis: gross

#### Resource Data

- Category: inferred
- Tonnes: 220800000
- Grade: 0.19
- Grade Unit: %
- Contained Metal: 420
- Contained Unit: kt
- Cutoff Grade: 10.25
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard inferred oxide resource component. \(Expanded from multi-commodity resource table for completeness.\)

Evidence · table

> 0.19

Context: 220.8

#### Tags used in scoring

**Inferred Resource**

Polarity: negative

Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.

Why it applies: category is "inferred"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

### inferred

[Link to this fact](https://atlas-extractions.minestarters.com/news/aldebaran-and-centauri-announce-significant-increase-in-mineral-resources-for-th--3b486d1c-45bd-412d-882c-d24df75c7bd1#fact-resource-facts-23)

Rio Grande · silver

#### Identity

- Project: Rio Grande
- Commodity: silver
- Region: argentina
- Reported Region: Salta, Argentina
- Ticker: ALDE

#### Resource scope

- Estimate type: resource
- Reporting standards: ni\_43\_101
- QP Signed: Yes
- Qualified person names: Benjamin Sanfurgo
- Resource group id: resource:8119c7a2eac3aa96f3ed
- Deposit or zone: Oxide
- Mining method: open\_pit
- Material type: Inferred
- Resource basis: gross

#### Resource Data

- Category: inferred
- Tonnes: 220800000
- Grade: 17.8
- Grade Unit: moz
- Cutoff Grade: 10.25
- Cutoff Unit: US$/t

#### Prior Estimate

- Resource Date: 2026-02-15

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-03-02T00:00:00.000Z

Reasoning: Standard inferred oxide resource component. \(Expanded from multi-commodity resource table for completeness.\)

Evidence · table

> 17.8

Context: 220.8

#### Tags used in scoring

**Inferred Resource**

Polarity: negative

Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.

Why it applies: category is "inferred"

**Cut-off Disclosed**

Polarity: positive

Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff\_grade is stated

**QP/CP Signed**

Polarity: positive

Definition: 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: qp\_signed is true

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: reporting\_standards includes ni\_43\_101

**No Contained Metal**

Polarity: negative

Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.

Why it applies: contained\_metal was not reported

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: the release compares against a previous estimate

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: the release names the study this estimate supports

## 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.