Silverco’s La Negra posts $329M value over $21M costs
Original announcement by northernminer on
- Company
- Silverco Mining
- Ticker
- SICO
- Exchange
- Unavailable
- Region
- Mexico
- Primary commodity
- Silver
- Secondary commodities
- Copper, Lead, Zinc
- Document categories
- Resource update, Economic study
- Extracted
- 2026-09-21 16:49:00 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Silverco Mining has released a Preliminary Economic Assessment (PEA) for its La Negra silver project in Mexico, reporting a post-tax NPV of $329 million and an IRR of 131%. The project benefits from existing infrastructure, requiring only $21 million in initial costs to target commercial production in 2027.
Reasoning: The PEA reports exceptionally high returns (131% IRR) and low capital intensity for a silver-lead-zinc-copper project in Mexico, though it remains at a preliminary stage.
Positive factors
- High post-tax IRR of 131%
- Low initial capital requirement of $21M due to existing infrastructure
- Strong silver grades in indicated resource (106 g/t)
- Significant contained metal scale
Negative factors
- PEA level maturity (Class 4) implies high uncertainty
- Project relies on converting inferred resources to indicated/measured
Facts used in scoring: 9
Classification and evidence
PEA Onlyneutral
Only Class 4 / Initial Assessment economics available. Not bankable.
Why it applies: The document describes the results as a preliminary economic assessment (PEA).
Evidence · text
“A preliminary economic assessment (PEA) for Silverco Mining’s”
High IRRpositive
Post-tax real unlevered IRR in the strong tier or better.
Why it applies: The reported post-tax IRR of 131% is in the exceptional tier.
Evidence · text
“post-tax internal rate of return of 131%”
Low Capital Intensitypositive
Below the benchmark for its project type.
Why it applies: Initial costs of $21M for a project with $329M NPV is very low.
Evidence · text
“at initial costs of about $21 million”
Indicated Resourcepositive
Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.
Why it applies: The study includes a significant indicated resource component.
Evidence · text
“includes a resource of 15.2 million indicated tonnes”
Extracted facts
Stored fact records: 8. Some facts used in scoring do not have a stored record.
Resource Estimates (8)
indicatedLa Negra · silverTonnes: 15200000Grade: 106Grade Unit: g/tContained Metal: 51.9Contained Unit: million oz. silverView all detailsHide details
Identity
- Project
- La Negra
- Commodity
- silver
- Region
- mexico
- Reported Region
- Mexico
- Ticker
- SICO
Resource scope
- Estimate type
- resource
- Resource group id
- resource:17fb24305241707b4850
- Mining method
- underground
Resource Data
- Category
- indicated
- Tonnes
- 15200000
- Grade
- 106
- Grade Unit
- g/t
- Contained Metal
- 51.9
- Contained Unit
- million oz. silver
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-21T00:00:00.000Z
Reasoning: Strong indicated resource grade.
Positive factors
- High silver grade
Evidence · text
“15.2 million indicated tonnes grading 106 grams silver per tonne... for 51.9 million oz. silver”
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 Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
No QP/CP Disclosurenegative
No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience.
Why it applies: no Qualified or Competent Person is named anywhere in the release
PEA-Supportingneutral
Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.
Why it applies: the release names the study this estimate supports
indicatedLa Negra · leadTonnes: 15200000Grade: 0.59Grade Unit: %Contained Metal: 199Contained Unit: million lb. leadView all detailsHide details
Identity
- Project
- La Negra
- Commodity
- lead
- Region
- mexico
- Reported Region
- Mexico
- Ticker
- SICO
Resource scope
- Estimate type
- resource
- Resource group id
- resource:17fb24305241707b4850
- Mining method
- underground
Resource Data
- Category
- indicated
- Tonnes
- 15200000
- Grade
- 0.59
- Grade Unit
- %
- Contained Metal
- 199
- Contained Unit
- million lb. lead
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-21T00:00:00.000Z
Reasoning: Byproduct lead grade.
Evidence · text
“15.2 million indicated tonnes grading... 0.59% lead... for 199 million lb. lead”
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 Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
No QP/CP Disclosurenegative
No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience.
Why it applies: no Qualified or Competent Person is named anywhere in the release
PEA-Supportingneutral
Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.
Why it applies: the release names the study this estimate supports
indicatedLa Negra · zincTonnes: 15200000Grade: 1.81Grade Unit: %Contained Metal: 608Contained Unit: million lb. zincView all detailsHide details
Identity
- Project
- La Negra
- Commodity
- zinc
- Region
- mexico
- Reported Region
- Mexico
- Ticker
- SICO
Resource scope
- Estimate type
- resource
- Resource group id
- resource:17fb24305241707b4850
- Mining method
- underground
Resource Data
- Category
- indicated
- Tonnes
- 15200000
- Grade
- 1.81
- Grade Unit
- %
- Contained Metal
- 608
- Contained Unit
- million lb. zinc
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-21T00:00:00.000Z
Reasoning: Byproduct zinc grade.
Evidence · text
“15.2 million indicated tonnes grading... 1.81% zinc... for 608 million lb. zinc”
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 Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
No QP/CP Disclosurenegative
No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience.
Why it applies: no Qualified or Competent Person is named anywhere in the release
PEA-Supportingneutral
Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.
Why it applies: the release names the study this estimate supports
indicatedLa Negra · copperTonnes: 15200000Grade: 0.47Grade Unit: %Contained Metal: 158Contained Unit: million lb. copperView all detailsHide details
Identity
- Project
- La Negra
- Commodity
- copper
- Region
- mexico
- Reported Region
- Mexico
- Ticker
- SICO
Resource scope
- Estimate type
- resource
- Resource group id
- resource:17fb24305241707b4850
- Mining method
- underground
Resource Data
- Category
- indicated
- Tonnes
- 15200000
- Grade
- 0.47
- Grade Unit
- %
- Contained Metal
- 158
- Contained Unit
- million lb. copper
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-21T00:00:00.000Z
Reasoning: Byproduct copper grade.
Evidence · text
“15.2 million indicated tonnes grading... 0.47% copper for 158 million lb. copper”
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 Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
No QP/CP Disclosurenegative
No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience.
Why it applies: no Qualified or Competent Person is named anywhere in the release
PEA-Supportingneutral
Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.
Why it applies: the release names the study this estimate supports
inferredLa Negra · silverTonnes: 2200000Grade: 92Grade Unit: g/tContained Metal: 6.7Contained Unit: million oz. silverView all detailsHide details
Identity
- Project
- La Negra
- Commodity
- silver
- Region
- mexico
- Reported Region
- Mexico
- Ticker
- SICO
Resource scope
- Estimate type
- resource
- Resource group id
- resource:6f81d9ddd4073e7a105c
- Mining method
- underground
Resource Data
- Category
- inferred
- Tonnes
- 2200000
- Grade
- 92
- Grade Unit
- g/t
- Contained Metal
- 6.7
- Contained Unit
- million oz. silver
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-21T00:00:00.000Z
Reasoning: Inferred resource component.
Negative factors
- Inferred category
Evidence · text
“Inferred resources total 2.2 million tonnes at 92 grams silver... for 6.7 million oz. silver”
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 Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
No QP/CP Disclosurenegative
No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience.
Why it applies: no Qualified or Competent Person is named anywhere in the release
PEA-Supportingneutral
Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.
Why it applies: the release names the study this estimate supports
inferredLa Negra · leadTonnes: 2200000Grade: 1Grade Unit: %Contained Metal: 49.7Contained Unit: million lb. leadView all detailsHide details
Identity
- Project
- La Negra
- Commodity
- lead
- Region
- mexico
- Reported Region
- Mexico
- Ticker
- SICO
Resource scope
- Estimate type
- resource
- Resource group id
- resource:6f81d9ddd4073e7a105c
- Mining method
- underground
Resource Data
- Category
- inferred
- Tonnes
- 2200000
- Grade
- 1
- Grade Unit
- %
- Contained Metal
- 49.7
- Contained Unit
- million lb. lead
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-21T00:00:00.000Z
Reasoning: Inferred byproduct lead.
Evidence · text
“Inferred resources total 2.2 million tonnes at... 1% lead... for 49.7 million lb. lead”
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 Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
No QP/CP Disclosurenegative
No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience.
Why it applies: no Qualified or Competent Person is named anywhere in the release
PEA-Supportingneutral
Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.
Why it applies: the release names the study this estimate supports
inferredLa Negra · zincTonnes: 2200000Grade: 1.92Grade Unit: %Contained Metal: 95.7Contained Unit: million lb. zincView all detailsHide details
Identity
- Project
- La Negra
- Commodity
- zinc
- Region
- mexico
- Reported Region
- Mexico
- Ticker
- SICO
Resource scope
- Estimate type
- resource
- Resource group id
- resource:6f81d9ddd4073e7a105c
- Mining method
- underground
Resource Data
- Category
- inferred
- Tonnes
- 2200000
- Grade
- 1.92
- Grade Unit
- %
- Contained Metal
- 95.7
- Contained Unit
- million lb. zinc
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-21T00:00:00.000Z
Reasoning: Inferred byproduct zinc.
Evidence · text
“Inferred resources total 2.2 million tonnes at... 1.92% zinc... for 95.7 million lb. zinc”
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 Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
No QP/CP Disclosurenegative
No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience.
Why it applies: no Qualified or Competent Person is named anywhere in the release
PEA-Supportingneutral
Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.
Why it applies: the release names the study this estimate supports
inferredLa Negra · copperTonnes: 2200000Grade: 0.21Grade Unit: %Contained Metal: 10.6Contained Unit: million lb. copperView all detailsHide details
Identity
- Project
- La Negra
- Commodity
- copper
- Region
- mexico
- Reported Region
- Mexico
- Ticker
- SICO
Resource scope
- Estimate type
- resource
- Resource group id
- resource:6f81d9ddd4073e7a105c
- Mining method
- underground
Resource Data
- Category
- inferred
- Tonnes
- 2200000
- Grade
- 0.21
- Grade Unit
- %
- Contained Metal
- 10.6
- Contained Unit
- million lb. copper
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-21T00:00:00.000Z
Reasoning: Inferred byproduct copper.
Evidence · text
“Inferred resources total 2.2 million tonnes at... 0.21% copper for 10.6 million lb. copper”
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 Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
No QP/CP Disclosurenegative
No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience.
Why it applies: no Qualified or Competent Person is named anywhere in the release
PEA-Supportingneutral
Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.
Why it applies: the release names the study this estimate supports
How Atlas produces this analysis
Minestarters Atlas uses automated extraction to summarize mining announcements, identify reported measurements, and classify supporting evidence. Sentiment reflects the extracted narrative and classification rules; it is an interpretation, not a reported measurement. Evidence quotes and context are provided where available. Missing data, low-confidence results, and review flags indicate limitations. Check the original publisher announcement before relying on an interpretation.