ESR: MRE Update - Werumata Limestone Project
Original announcement by asx on
- Company
- Estrella Resources Limited
- Ticker
- ESR
- Exchange
- ASX
- Region
- Timor-Leste
- Primary commodity
- Limestone
- Secondary commodities
- Silicon dioxide, Aluminium oxide, Calcium oxide, Magnesium oxide
- Document categories
- Resource update
- Extracted
- 2026-10-14 23:11:04 UTC
Analysis by Minestarters Atlas
Atlas analysis published:
Minestarters Atlas analysis
Summary
Estrella Resources Limited has announced a significant Mineral Resource Estimate (MRE) upgrade for its Werumata Limestone Project in Timor-Leste. The updated MRE now includes 274Mt of Indicated Resource, representing 51% of the total 533Mt, a substantial improvement from the entirely Inferred maiden MRE. This upgrade, particularly for the high-quality Product 1 limestone, is supported by an expanded bulk density program and provides a stronger technical foundation for advancing development studies.
Reasoning: The MRE update significantly upgrades the resource classification at Werumata, with 51% of the total resource and 70% of the high-quality Product 1 now classified as Indicated, addressing a key data limitation and providing a stronger foundation for development.
Positive factors
- Category Upgrade
- QP/CP Signed
- JORC Compliant
- Expanded bulk density program addressed key limitation
- Increased confidence in resource
Negative factors
- Overall tonnage reduction from prior MRE
- Some horizons remain Inferred
- Product 3 has low economic value
Facts used in scoring: 30
Classification and evidence
Category Upgradepositive
Resource confidence improved — Inferred upgraded to Indicated, or Indicated to Measured. De-risking signal.
Why it applies: The updated Mineral Resource now has approximately 51% classified as Indicated, compared with the entirely Inferred maiden MRE.
Evidence · text
“Significant resource classification upgrade at Werumata, with approximately 51% of the updated Mineral Resource now Indicated, compared with the entirely Inferred maiden MRE announced earlier this year”
QP/CP Signedpositive
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: Robert de Jongh FAusIMM is acting as the Competent Person for Mineral Resource estimation.
Evidence · text
“Robert de Jongh FAusIMM acting as the Competent Person for Mineral Resource estimation.”
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: The announcement states that the MRE has been prepared in compliance with the 2012 Edition of the JORC Code.
Evidence · text
“This announcement has been prepared in compliance with the 2012 Edition of the JORC Code”
Tonnage Declinenegative
Resource tonnage decreased vs prior estimate — pit optimization removed marginal material or geological model revised down.
Why it applies: The total central estimate of the Mineral Resource has been reduced from 621Mt to 533Mt.
Evidence · text
“reduction from the maiden MRE of 621Mt solely due to changes in estimated bulk densities”
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: The document announces an update to the Mineral Resource Estimate for the Werumata Limestone Project.
Evidence · text
“WERUMATA RESOURCE UPGRADE DELIVERS 274MT INDICATED LIMESTONE RESOURCE”
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: The updated MRE still comprises 259Mt of Inferred resource.
Evidence · text
“Updated total Mineral Resource of 533Mt, comprising 274Mt Indicated and 259Mt Inferred”
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: Cut-off grades for Product 1 (ANC ≥47%) and Product 2 (ANC 20–47%) are clearly stated.
Evidence · text
“Product 1: ANC ≥47%; Product 2: ANC 20–47%; Product 3: ANC <20%.”
Extracted facts
Stored fact records: 30. Some facts used in scoring do not have a stored record.
Resource Estimates (30)
indicatedWerumata Limestone Project · limestoneTonnes: 274000000Grade: 84.7Grade Unit: % ANCView all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- limestone
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:2e678d31c514fb06450e
- Deposit or zone
- Product 1
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 274000000
- Grade
- 84.7
- Grade Unit
- % ANC
- Cutoff Grade
- 47
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: This Indicated resource for Product 1 represents a significant upgrade in confidence from the prior entirely Inferred estimate, with a high ANC grade of 84.7%.
Positive factors
- Category Upgrade
- High Grade
- QP/CP Signed
- JORC Compliant
Evidence · table
“84.7”
Context: 274
Tags used in scoring
Indicated Resourcepositive
Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.
Why it applies: category is "indicated"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
indicatedWerumata Limestone Project · aluminium oxideTonnes: 274000000Grade: 2.2Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- aluminium oxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:2e678d31c514fb06450e
- Deposit or zone
- Product 1
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 274000000
- Grade
- 2.2
- Grade Unit
- %
- Cutoff Grade
- 47
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: This Indicated resource for Product 1 includes a 2.2% aluminium oxide grade, reflecting the overall resource upgrade and confidence.
Positive factors
- Category Upgrade
- QP/CP Signed
- JORC Compliant
Evidence · table
“2.2”
Context: 274
Tags used in scoring
Indicated Resourcepositive
Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.
Why it applies: category is "indicated"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
indicatedWerumata Limestone Project · calcium oxideTonnes: 274000000Grade: 45.1Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- calcium oxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:2e678d31c514fb06450e
- Deposit or zone
- Product 1
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 274000000
- Grade
- 45.1
- Grade Unit
- %
- Cutoff Grade
- 47
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: This Indicated resource for Product 1 includes a 45.1% calcium oxide grade, reflecting the overall resource upgrade and confidence.
Positive factors
- Category Upgrade
- QP/CP Signed
- JORC Compliant
Evidence · table
“45.1”
Context: 274
Tags used in scoring
Indicated Resourcepositive
Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.
Why it applies: category is "indicated"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
indicatedWerumata Limestone Project · magnesium oxideTonnes: 274000000Grade: 2.1Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- magnesium oxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:2e678d31c514fb06450e
- Deposit or zone
- Product 1
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 274000000
- Grade
- 2.1
- Grade Unit
- %
- Cutoff Grade
- 47
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: This Indicated resource for Product 1 includes a 2.1% magnesium oxide grade, reflecting the overall resource upgrade and confidence.
Positive factors
- Category Upgrade
- QP/CP Signed
- JORC Compliant
Evidence · table
“2.1”
Context: 274
Tags used in scoring
Indicated Resourcepositive
Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.
Why it applies: category is "indicated"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
indicatedWerumata Limestone Project · silicon dioxideTonnes: 274000000Grade: 9.7Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- silicon dioxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:2e678d31c514fb06450e
- Deposit or zone
- Product 1
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 274000000
- Grade
- 9.7
- Grade Unit
- %
- Cutoff Grade
- 47
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: This Indicated resource for Product 1 includes a 9.7% silicon dioxide grade, reflecting the overall resource upgrade and confidence.
Positive factors
- Category Upgrade
- QP/CP Signed
- JORC Compliant
Evidence · table
“9.7”
Context: 274
Tags used in scoring
Indicated Resourcepositive
Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.
Why it applies: category is "indicated"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredWerumata Limestone Project · limestoneTonnes: 117000000Grade: 81.8Grade Unit: % ANCView all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- limestone
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:1c062dd1aa9551690162
- Deposit or zone
- Product 1
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 117000000
- Grade
- 81.8
- Grade Unit
- % ANC
- Cutoff Grade
- 47
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
- Prior Tonnes
- 493000000
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The Inferred resource for Product 1, while still substantial at 117Mt with 81.8% ANC, shows a tonnage reduction from the prior estimate of 493Mt, reflecting changes in bulk density.
Positive factors
- QP/CP Signed
- JORC Compliant
Negative factors
- Inferred Resource
- Tonnage Decline
Evidence · table
“81.8”
Context: 117
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Tonnage Declinenegative
Resource tonnage decreased vs prior estimate — pit optimization removed marginal material or geological model revised down.
Why it applies: 117000000 against 493000000 previously
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredWerumata Limestone Project · aluminium oxideTonnes: 117000000Grade: 3.3Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- aluminium oxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:1c062dd1aa9551690162
- Deposit or zone
- Product 1
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 117000000
- Grade
- 3.3
- Grade Unit
- %
- Cutoff Grade
- 47
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
- Prior Tonnes
- 493000000
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The Inferred resource for Product 1 includes a 3.3% aluminium oxide grade, reflecting the overall tonnage reduction from the prior estimate.
Positive factors
- QP/CP Signed
- JORC Compliant
Negative factors
- Inferred Resource
- Tonnage Decline
Evidence · table
“3.3”
Context: 117
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Tonnage Declinenegative
Resource tonnage decreased vs prior estimate — pit optimization removed marginal material or geological model revised down.
Why it applies: 117000000 against 493000000 previously
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredWerumata Limestone Project · calcium oxideTonnes: 117000000Grade: 44Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- calcium oxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:1c062dd1aa9551690162
- Deposit or zone
- Product 1
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 117000000
- Grade
- 44
- Grade Unit
- %
- Cutoff Grade
- 47
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
- Prior Tonnes
- 493000000
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The Inferred resource for Product 1 includes a 44.0% calcium oxide grade, reflecting the overall tonnage reduction from the prior estimate.
Positive factors
- QP/CP Signed
- JORC Compliant
Negative factors
- Inferred Resource
- Tonnage Decline
Evidence · table
“44.0”
Context: 117
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Tonnage Declinenegative
Resource tonnage decreased vs prior estimate — pit optimization removed marginal material or geological model revised down.
Why it applies: 117000000 against 493000000 previously
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredWerumata Limestone Project · magnesium oxideTonnes: 117000000Grade: 1.4Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- magnesium oxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:1c062dd1aa9551690162
- Deposit or zone
- Product 1
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 117000000
- Grade
- 1.4
- Grade Unit
- %
- Cutoff Grade
- 47
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
- Prior Tonnes
- 493000000
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The Inferred resource for Product 1 includes a 1.4% magnesium oxide grade, reflecting the overall tonnage reduction from the prior estimate.
Positive factors
- QP/CP Signed
- JORC Compliant
Negative factors
- Inferred Resource
- Tonnage Decline
Evidence · table
“1.4”
Context: 117
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Tonnage Declinenegative
Resource tonnage decreased vs prior estimate — pit optimization removed marginal material or geological model revised down.
Why it applies: 117000000 against 493000000 previously
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredWerumata Limestone Project · silicon dioxideTonnes: 117000000Grade: 11.6Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- silicon dioxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:1c062dd1aa9551690162
- Deposit or zone
- Product 1
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 117000000
- Grade
- 11.6
- Grade Unit
- %
- Cutoff Grade
- 47
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
- Prior Tonnes
- 493000000
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The Inferred resource for Product 1 includes a 11.6% silicon dioxide grade, reflecting the overall tonnage reduction from the prior estimate.
Positive factors
- QP/CP Signed
- JORC Compliant
Negative factors
- Inferred Resource
- Tonnage Decline
Evidence · table
“11.6”
Context: 117
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Tonnage Declinenegative
Resource tonnage decreased vs prior estimate — pit optimization removed marginal material or geological model revised down.
Why it applies: 117000000 against 493000000 previously
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredWerumata Limestone Project · limestoneTonnes: 33000000Grade: 35.5Grade Unit: % ANCView all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- limestone
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:54d6d8c87daf575c5eb6
- Deposit or zone
- Product 2
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 33000000
- Grade
- 35.5
- Grade Unit
- % ANC
- Cutoff Grade
- 20
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
- Prior Tonnes
- 33000000
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The Inferred resource for Product 2 remains unchanged in tonnage from the prior estimate, with a moderate ANC grade of 35.5%.
Positive factors
- QP/CP Signed
- JORC Compliant
Negative factors
- Inferred Resource
- Low Grade
Evidence · table
“35.5”
Context: 33
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredWerumata Limestone Project · aluminium oxideTonnes: 33000000Grade: 11Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- aluminium oxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:54d6d8c87daf575c5eb6
- Deposit or zone
- Product 2
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 33000000
- Grade
- 11
- Grade Unit
- %
- Cutoff Grade
- 20
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
- Prior Tonnes
- 33000000
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The Inferred resource for Product 2 includes a 11.0% aluminium oxide grade, with tonnage unchanged from the prior estimate.
Positive factors
- QP/CP Signed
- JORC Compliant
Negative factors
- Inferred Resource
Evidence · table
“11.0”
Context: 33
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredWerumata Limestone Project · calcium oxideTonnes: 33000000Grade: 17Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- calcium oxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:54d6d8c87daf575c5eb6
- Deposit or zone
- Product 2
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 33000000
- Grade
- 17
- Grade Unit
- %
- Cutoff Grade
- 20
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
- Prior Tonnes
- 33000000
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The Inferred resource for Product 2 includes a 17.0% calcium oxide grade, with tonnage unchanged from the prior estimate.
Positive factors
- QP/CP Signed
- JORC Compliant
Negative factors
- Inferred Resource
Evidence · table
“17.0”
Context: 33
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredWerumata Limestone Project · magnesium oxideTonnes: 33000000Grade: 2.2Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- magnesium oxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:54d6d8c87daf575c5eb6
- Deposit or zone
- Product 2
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 33000000
- Grade
- 2.2
- Grade Unit
- %
- Cutoff Grade
- 20
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
- Prior Tonnes
- 33000000
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The Inferred resource for Product 2 includes a 2.2% magnesium oxide grade, with tonnage unchanged from the prior estimate.
Positive factors
- QP/CP Signed
- JORC Compliant
Negative factors
- Inferred Resource
Evidence · table
“2.2”
Context: 33
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredWerumata Limestone Project · silicon dioxideTonnes: 33000000Grade: 43Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- silicon dioxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:54d6d8c87daf575c5eb6
- Deposit or zone
- Product 2
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 33000000
- Grade
- 43
- Grade Unit
- %
- Cutoff Grade
- 20
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
- Prior Tonnes
- 33000000
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The Inferred resource for Product 2 includes a 43.0% silicon dioxide grade, with tonnage unchanged from the prior estimate.
Positive factors
- QP/CP Signed
- JORC Compliant
Negative factors
- Inferred Resource
Evidence · table
“43.0”
Context: 33
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredWerumata Limestone Project · silicon dioxideTonnes: 109000000Grade: 58.2Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- silicon dioxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:b356ad9bf2bb7d4db17f
- Deposit or zone
- Product 3
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 109000000
- Grade
- 58.2
- Grade Unit
- %
- Cutoff Grade
- 20
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
- Prior Tonnes
- 95000000
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The Inferred resource for Product 3 shows a tonnage increase to 109Mt from 95Mt, with a high silicon dioxide grade of 58.2%, though its economic value is noted as low.
Positive factors
- Tonnage Growth
- QP/CP Signed
- JORC Compliant
Negative factors
- Inferred Resource
- Low economic value
Evidence · table
“58.2”
Context: 109
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredWerumata Limestone Project · limestoneTonnes: 109000000Grade: 11.6Grade Unit: % ANCView all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- limestone
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:b356ad9bf2bb7d4db17f
- Deposit or zone
- Product 3
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 109000000
- Grade
- 11.6
- Grade Unit
- % ANC
- Cutoff Grade
- 20
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
- Prior Tonnes
- 95000000
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The Inferred resource for Product 3 shows tonnage growth but has a very low ANC grade of 11.6%, indicating its primary use as road base and fill.
Positive factors
- Tonnage Growth
- QP/CP Signed
- JORC Compliant
Negative factors
- Inferred Resource
- Low Grade
- Low economic value
Evidence · table
“11.6”
Context: 109
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredWerumata Limestone Project · aluminium oxideTonnes: 109000000Grade: 15.4Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- aluminium oxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:b356ad9bf2bb7d4db17f
- Deposit or zone
- Product 3
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 109000000
- Grade
- 15.4
- Grade Unit
- %
- Cutoff Grade
- 20
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
- Prior Tonnes
- 95000000
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The Inferred resource for Product 3 includes a 15.4% aluminium oxide grade, reflecting tonnage growth from the prior estimate.
Positive factors
- Tonnage Growth
- QP/CP Signed
- JORC Compliant
Negative factors
- Inferred Resource
- Low economic value
Evidence · table
“15.4”
Context: 109
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredWerumata Limestone Project · calcium oxideTonnes: 109000000Grade: 3.1Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- calcium oxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:b356ad9bf2bb7d4db17f
- Deposit or zone
- Product 3
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 109000000
- Grade
- 3.1
- Grade Unit
- %
- Cutoff Grade
- 20
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
- Prior Tonnes
- 95000000
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The Inferred resource for Product 3 includes a 3.1% calcium oxide grade, reflecting tonnage growth from the prior estimate.
Positive factors
- Tonnage Growth
- QP/CP Signed
- JORC Compliant
Negative factors
- Inferred Resource
- Low economic value
Evidence · table
“3.1”
Context: 109
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredWerumata Limestone Project · magnesium oxideTonnes: 109000000Grade: 2.6Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- magnesium oxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:b356ad9bf2bb7d4db17f
- Deposit or zone
- Product 3
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 109000000
- Grade
- 2.6
- Grade Unit
- %
- Cutoff Grade
- 20
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
- Prior Tonnes
- 95000000
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The Inferred resource for Product 3 includes a 2.6% magnesium oxide grade, reflecting tonnage growth from the prior estimate.
Positive factors
- Tonnage Growth
- QP/CP Signed
- JORC Compliant
Negative factors
- Inferred Resource
- Low economic value
Evidence · table
“2.6”
Context: 109
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
indicatedWerumata Limestone Project · limestoneTonnes: 274000000Grade: 84.7Grade Unit: % ANCView all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- limestone
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:72925c8ff15b29e47a97
- Deposit or zone
- All Products
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 274000000
- Grade
- 84.7
- Grade Unit
- % ANC
- Cutoff Grade
- 47
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The overall Indicated resource of 274Mt, primarily from Product 1, represents a significant upgrade in confidence with a high ANC grade of 84.7%.
Positive factors
- Category Upgrade
- High Grade
- QP/CP Signed
- JORC Compliant
Evidence · table
“84.7”
Context: 274
Tags used in scoring
Indicated Resourcepositive
Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.
Why it applies: category is "indicated"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
indicatedWerumata Limestone Project · aluminium oxideTonnes: 274000000Grade: 2.2Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- aluminium oxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:72925c8ff15b29e47a97
- Deposit or zone
- All Products
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 274000000
- Grade
- 2.2
- Grade Unit
- %
- Cutoff Grade
- 47
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The overall Indicated resource includes a 2.2% aluminium oxide grade, reflecting the significant upgrade in confidence.
Positive factors
- Category Upgrade
- QP/CP Signed
- JORC Compliant
Evidence · table
“2.2”
Context: 274
Tags used in scoring
Indicated Resourcepositive
Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.
Why it applies: category is "indicated"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
indicatedWerumata Limestone Project · calcium oxideTonnes: 274000000Grade: 45.1Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- calcium oxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:72925c8ff15b29e47a97
- Deposit or zone
- All Products
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 274000000
- Grade
- 45.1
- Grade Unit
- %
- Cutoff Grade
- 47
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The overall Indicated resource includes a 45.1% calcium oxide grade, reflecting the significant upgrade in confidence.
Positive factors
- Category Upgrade
- QP/CP Signed
- JORC Compliant
Evidence · table
“45.1”
Context: 274
Tags used in scoring
Indicated Resourcepositive
Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.
Why it applies: category is "indicated"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
indicatedWerumata Limestone Project · magnesium oxideTonnes: 274000000Grade: 2.1Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- magnesium oxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:72925c8ff15b29e47a97
- Deposit or zone
- All Products
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 274000000
- Grade
- 2.1
- Grade Unit
- %
- Cutoff Grade
- 47
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The overall Indicated resource includes a 2.1% magnesium oxide grade, reflecting the significant upgrade in confidence.
Positive factors
- Category Upgrade
- QP/CP Signed
- JORC Compliant
Evidence · table
“2.1”
Context: 274
Tags used in scoring
Indicated Resourcepositive
Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.
Why it applies: category is "indicated"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
indicatedWerumata Limestone Project · silicon dioxideTonnes: 274000000Grade: 9.7Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- silicon dioxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:72925c8ff15b29e47a97
- Deposit or zone
- All Products
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 274000000
- Grade
- 9.7
- Grade Unit
- %
- Cutoff Grade
- 47
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The overall Indicated resource includes a 9.7% silicon dioxide grade, reflecting the significant upgrade in confidence.
Positive factors
- Category Upgrade
- QP/CP Signed
- JORC Compliant
Evidence · table
“9.7”
Context: 274
Tags used in scoring
Indicated Resourcepositive
Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.
Why it applies: category is "indicated"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredWerumata Limestone Project · limestoneTonnes: 259000000Grade: 46.4Grade Unit: % ANCView all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- limestone
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:413f6c032efdf62bfe97
- Deposit or zone
- All Products
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 259000000
- Grade
- 46.4
- Grade Unit
- % ANC
- Cutoff Grade
- 20
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
- Prior Tonnes
- 621000000
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The overall Inferred resource of 259Mt, with an ANC grade of 46.4%, represents a significant tonnage reduction from the prior 621Mt, primarily due to bulk density changes.
Positive factors
- QP/CP Signed
- JORC Compliant
Negative factors
- Inferred Resource
- Tonnage Decline
Evidence · table
“46.4”
Context: 259
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Tonnage Declinenegative
Resource tonnage decreased vs prior estimate — pit optimization removed marginal material or geological model revised down.
Why it applies: 259000000 against 621000000 previously
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredWerumata Limestone Project · aluminium oxideTonnes: 259000000Grade: 9.4Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- aluminium oxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:413f6c032efdf62bfe97
- Deposit or zone
- All Products
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 259000000
- Grade
- 9.4
- Grade Unit
- %
- Cutoff Grade
- 20
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
- Prior Tonnes
- 621000000
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The overall Inferred resource includes a 9.4% aluminium oxide grade, reflecting the significant tonnage reduction from the prior estimate.
Positive factors
- QP/CP Signed
- JORC Compliant
Negative factors
- Inferred Resource
- Tonnage Decline
Evidence · table
“9.4”
Context: 259
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Tonnage Declinenegative
Resource tonnage decreased vs prior estimate — pit optimization removed marginal material or geological model revised down.
Why it applies: 259000000 against 621000000 previously
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredWerumata Limestone Project · calcium oxideTonnes: 259000000Grade: 23.4Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- calcium oxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:413f6c032efdf62bfe97
- Deposit or zone
- All Products
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 259000000
- Grade
- 23.4
- Grade Unit
- %
- Cutoff Grade
- 20
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
- Prior Tonnes
- 621000000
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The overall Inferred resource includes a 23.4% calcium oxide grade, reflecting the significant tonnage reduction from the prior estimate.
Positive factors
- QP/CP Signed
- JORC Compliant
Negative factors
- Inferred Resource
- Tonnage Decline
Evidence · table
“23.4”
Context: 259
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Tonnage Declinenegative
Resource tonnage decreased vs prior estimate — pit optimization removed marginal material or geological model revised down.
Why it applies: 259000000 against 621000000 previously
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredWerumata Limestone Project · magnesium oxideTonnes: 259000000Grade: 2Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- magnesium oxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:413f6c032efdf62bfe97
- Deposit or zone
- All Products
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 259000000
- Grade
- 2
- Grade Unit
- %
- Cutoff Grade
- 20
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
- Prior Tonnes
- 621000000
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The overall Inferred resource includes a 2.0% magnesium oxide grade, reflecting the significant tonnage reduction from the prior estimate.
Positive factors
- QP/CP Signed
- JORC Compliant
Negative factors
- Inferred Resource
- Tonnage Decline
Evidence · table
“2.0”
Context: 259
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Tonnage Declinenegative
Resource tonnage decreased vs prior estimate — pit optimization removed marginal material or geological model revised down.
Why it applies: 259000000 against 621000000 previously
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredWerumata Limestone Project · silicon dioxideTonnes: 259000000Grade: 35.1Grade Unit: %View all detailsHide details
Identity
- Project
- Werumata Limestone Project
- Commodity
- silicon dioxide
- Region
- timor-leste
- Reported Region
- Timor-Leste
- Ticker
- ESR
Resource scope
- Estimate type
- resource
- Effective date
- 2026-10-15T00:00:00.000Z
- Reporting standards
- jorc
- QP Signed
- Yes
- Qualified person names
- Robert de Jongh
- Resource group id
- resource:413f6c032efdf62bfe97
- Deposit or zone
- All Products
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 259000000
- Grade
- 35.1
- Grade Unit
- %
- Cutoff Grade
- 20
- Cutoff Unit
- % ANC
Prior Estimate
- Resource Date
- 2026-10-15
- Prior Tonnes
- 621000000
Lab
- Laboratory
- ASEAMCO Pty Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-10-14T00:00:00.000Z
Reasoning: The overall Inferred resource includes a 35.1% silicon dioxide grade, reflecting the significant tonnage reduction from the prior estimate.
Positive factors
- QP/CP Signed
- JORC Compliant
Negative factors
- Inferred Resource
- Tonnage Decline
Evidence · table
“35.1”
Context: 259
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
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
JORC Compliantpositive
Resource estimate prepared in compliance with JORC Code (Australia) — high reporting standard.
Why it applies: reporting_standards includes jorc
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Tonnage Declinenegative
Resource tonnage decreased vs prior estimate — pit optimization removed marginal material or geological model revised down.
Why it applies: 259000000 against 621000000 previously
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
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.