RETRANSMISSION: Ridgestone Releases Maiden Mineral Resource Estimate at Guadalupe y Calvo, Mexico
Original announcement by tmx on
- Company
- Ridgestone Mining Inc.
- Ticker
- RMI
- Exchange
- TSX
- Region
- Chihuahua, Mexico
- Primary commodity
- Gold
- Secondary commodities
- Silver
- Document categories
- Resource update
- Extracted
- 2026-09-18 19:13:13 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Ridgestone Mining has announced a maiden NI 43-101 Mineral Resource Estimate for its Guadalupe y Calvo gold-silver project in Mexico. The estimate includes 6.43 Mt of Indicated and 3.07 Mt of Inferred resources, totaling approximately 356,000 oz AuEq (Indicated) and 460,000 oz AuEq (Inferred).
Reasoning: The announcement of a maiden NI 43-101 mineral resource estimate for the Guadalupe y Calvo project is a major milestone, establishing a significant gold-silver resource base.
Positive factors
- Maiden resource establishment
- Significant gold-equivalent ounces
- NI 43-101 compliant
- Independent QP sign-off
Negative factors
- High proportion of Inferred resource
Facts used in scoring: 8
Classification and evidence
Maiden Resourceneutral
First formal MRE for the project — establishes baseline but typically exploration-stage with high Inferred component. No prior estimate exists, so every change band is not applicable.
Why it applies: First formal MRE for the project.
Evidence · text
“maiden National Instrument 43-101 (NI 43-101) Mineral Resource Estimate”
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: Resource estimate prepared in compliance with NI 43-101.
Evidence · text
“complies with National Instrument 43-101”
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: Marc Jutras, P.Eng. is named as the independent QP.
Evidence · text
“prepared by Mr. Marc Jutras of Ginto Consulting Inc., an independent Qualified Person”
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: A significant portion of the resource is in the Inferred category.
Evidence · text
“Total Inferred 3,074,146”
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: A current resource fact retains the disclosed cut-off grade
Extracted facts
Stored fact records: 8. Some facts used in scoring do not have a stored record.
Resource Estimates (8)
indicatedGuadalupe y Calvo · silverTonnes: 5865413Grade: 46.3Grade Unit: g/tContained Metal: 8734564Contained Unit: ozView all detailsHide details
Identity
- Project
- Guadalupe y Calvo
- Commodity
- silver
- Region
- mexico
- Reported Region
- Chihuahua, Mexico
- Ticker
- RMI
Resource scope
- Estimate type
- resource
- Effective date
- 2021-05-10T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Marc Jutras
- Resource group id
- resource:18716e1c96b1205186cd
- Deposit or zone
- Rosario and Nankin veins
- Mining method
- open_pit
- Material type
- null
Resource Data
- Category
- indicated
- Tonnes
- 5865413
- Grade
- 46.3
- Grade Unit
- g/t
- Contained Metal
- 8734564
- Contained Unit
- oz
- Cutoff Grade
- 0.27
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2021-05-10
Metal Equivalent
- Assumptions Disclosed
- Yes
Lab
- Laboratory
- SGS
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2021-05-11T00:00:00.000Z
Reasoning: Indicated silver grade in open pit component of maiden resource.
Evidence · table
“46.3”
Context: 5,865,413
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
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
indicatedGuadalupe y Calvo · goldTonnes: 5865413Grade: 0.97Grade Unit: g/tContained Metal: 182133Contained Unit: ozView all detailsHide details
Identity
- Project
- Guadalupe y Calvo
- Commodity
- gold
- Region
- mexico
- Reported Region
- Chihuahua, Mexico
- Ticker
- RMI
Resource scope
- Estimate type
- resource
- Effective date
- 2021-05-10T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Marc Jutras
- Resource group id
- resource:18716e1c96b1205186cd
- Deposit or zone
- Rosario and Nankin veins
- Mining method
- open_pit
- Material type
- null
Resource Data
- Category
- indicated
- Tonnes
- 5865413
- Grade
- 0.97
- Grade Unit
- g/t
- Contained Metal
- 182133
- Contained Unit
- oz
- Cutoff Grade
- 0.27
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2021-05-10
Metal Equivalent
- Assumptions Disclosed
- Yes
Lab
- Laboratory
- SGS
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2021-05-11T00:00:00.000Z
Reasoning: Indicated gold grade in open pit component of maiden resource.
Evidence · table
“0.97”
Context: 5,865,413
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
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
indicatedGuadalupe y Calvo · goldTonnes: 562031Grade: 1.92Grade Unit: g/tContained Metal: 34733Contained Unit: ozView all detailsHide details
Identity
- Project
- Guadalupe y Calvo
- Commodity
- gold
- Region
- mexico
- Reported Region
- Chihuahua, Mexico
- Ticker
- RMI
Resource scope
- Estimate type
- resource
- Effective date
- 2021-05-10T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Marc Jutras
- Resource group id
- resource:854786a413ea14dc5b48
- Deposit or zone
- Rosario and Nankin veins
- Mining method
- underground
- Material type
- null
Resource Data
- Category
- indicated
- Tonnes
- 562031
- Grade
- 1.92
- Grade Unit
- g/t
- Contained Metal
- 34733
- Contained Unit
- oz
- Cutoff Grade
- 1.33
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2021-05-10
Metal Equivalent
- Assumptions Disclosed
- Yes
Lab
- Laboratory
- SGS
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2021-05-11T00:00:00.000Z
Reasoning: Indicated gold grade in underground component of maiden resource.
Evidence · table
“1.92”
Context: 562,031
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
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
indicatedGuadalupe y Calvo · silverTonnes: 562031Grade: 94.1Grade Unit: g/tContained Metal: 1700679Contained Unit: ozView all detailsHide details
Identity
- Project
- Guadalupe y Calvo
- Commodity
- silver
- Region
- mexico
- Reported Region
- Chihuahua, Mexico
- Ticker
- RMI
Resource scope
- Estimate type
- resource
- Effective date
- 2021-05-10T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Marc Jutras
- Resource group id
- resource:854786a413ea14dc5b48
- Deposit or zone
- Rosario and Nankin veins
- Mining method
- underground
- Material type
- null
Resource Data
- Category
- indicated
- Tonnes
- 562031
- Grade
- 94.1
- Grade Unit
- g/t
- Contained Metal
- 1700679
- Contained Unit
- oz
- Cutoff Grade
- 1.33
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2021-05-10
Metal Equivalent
- Assumptions Disclosed
- Yes
Lab
- Laboratory
- SGS
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2021-05-11T00:00:00.000Z
Reasoning: Indicated silver grade in underground component of maiden resource.
Evidence · table
“94.1”
Context: 562,031
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
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
inferredGuadalupe y Calvo · goldTonnes: 584637Grade: 0.75Grade Unit: g/tContained Metal: 14101Contained Unit: ozView all detailsHide details
Identity
- Project
- Guadalupe y Calvo
- Commodity
- gold
- Region
- mexico
- Reported Region
- Chihuahua, Mexico
- Ticker
- RMI
Resource scope
- Estimate type
- resource
- Effective date
- 2021-05-10T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Marc Jutras
- Resource group id
- resource:4281602b3befcff462ae
- Deposit or zone
- Rosario and Nankin veins
- Mining method
- open_pit
- Material type
- null
Resource Data
- Category
- inferred
- Tonnes
- 584637
- Grade
- 0.75
- Grade Unit
- g/t
- Contained Metal
- 14101
- Contained Unit
- oz
- Cutoff Grade
- 0.27
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2021-05-10
Metal Equivalent
- Assumptions Disclosed
- Yes
Lab
- Laboratory
- SGS
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2021-05-11T00:00:00.000Z
Reasoning: Inferred gold grade in open pit component.
Evidence · table
“0.75”
Context: 584,637
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
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
inferredGuadalupe y Calvo · silverTonnes: 584637Grade: 37.7Grade Unit: g/tContained Metal: 707975Contained Unit: ozView all detailsHide details
Identity
- Project
- Guadalupe y Calvo
- Commodity
- silver
- Region
- mexico
- Reported Region
- Chihuahua, Mexico
- Ticker
- RMI
Resource scope
- Estimate type
- resource
- Effective date
- 2021-05-10T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Marc Jutras
- Resource group id
- resource:4281602b3befcff462ae
- Deposit or zone
- Rosario and Nankin veins
- Mining method
- open_pit
- Material type
- null
Resource Data
- Category
- inferred
- Tonnes
- 584637
- Grade
- 37.7
- Grade Unit
- g/t
- Contained Metal
- 707975
- Contained Unit
- oz
- Cutoff Grade
- 0.27
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2021-05-10
Metal Equivalent
- Assumptions Disclosed
- Yes
Lab
- Laboratory
- SGS
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2021-05-11T00:00:00.000Z
Reasoning: Inferred silver grade in open pit component.
Evidence · table
“37.7”
Context: 584,637
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
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
inferredGuadalupe y Calvo · goldTonnes: 2489509Grade: 4.02Grade Unit: g/tContained Metal: 321516Contained Unit: ozView all detailsHide details
Identity
- Project
- Guadalupe y Calvo
- Commodity
- gold
- Region
- mexico
- Reported Region
- Chihuahua, Mexico
- Ticker
- RMI
Resource scope
- Estimate type
- resource
- Effective date
- 2021-05-10T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Marc Jutras
- Resource group id
- resource:8a8b42cbe9d4144eb49c
- Deposit or zone
- Rosario and Nankin veins
- Mining method
- underground
- Material type
- null
Resource Data
- Category
- inferred
- Tonnes
- 2489509
- Grade
- 4.02
- Grade Unit
- g/t
- Contained Metal
- 321516
- Contained Unit
- oz
- Cutoff Grade
- 1.33
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2021-05-10
Metal Equivalent
- Assumptions Disclosed
- Yes
Lab
- Laboratory
- SGS
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2021-05-11T00:00:00.000Z
Reasoning: High grade inferred gold in underground component.
Evidence · table
“4.02”
Context: 2,489,509
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
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
inferredGuadalupe y Calvo · silverTonnes: 2489509Grade: 107.5Grade Unit: g/tContained Metal: 8605435Contained Unit: ozView all detailsHide details
Identity
- Project
- Guadalupe y Calvo
- Commodity
- silver
- Region
- mexico
- Reported Region
- Chihuahua, Mexico
- Ticker
- RMI
Resource scope
- Estimate type
- resource
- Effective date
- 2021-05-10T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Marc Jutras
- Resource group id
- resource:8a8b42cbe9d4144eb49c
- Deposit or zone
- Rosario and Nankin veins
- Mining method
- underground
- Material type
- null
Resource Data
- Category
- inferred
- Tonnes
- 2489509
- Grade
- 107.5
- Grade Unit
- g/t
- Contained Metal
- 8605435
- Contained Unit
- oz
- Cutoff Grade
- 1.33
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2021-05-10
Metal Equivalent
- Assumptions Disclosed
- Yes
Lab
- Laboratory
- SGS
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2021-05-11T00:00:00.000Z
Reasoning: High grade inferred silver in underground component.
Evidence · table
“107.5”
Context: 2,489,509
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
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
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.