Zacatecas Silver Expands Oso Negro to Over 3 Kilometres of Mapped Gold-Silver Veins; Phase Two Rock Chip Sampling Returns up to 20.3 g/t Gold and 3,480 g/t Silver
Original announcement by globenewswire on
- Company
- Zacatecas Silver Corp.
- Ticker
- ZAC
- Exchange
- Unavailable
- Region
- Sonora, Mexico
- Primary commodity
- Gold
- Secondary commodities
- Silver, Lead, Zinc
- Document categories
- Drill results, Other
- Extracted
- 2026-09-10 12:43:18 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Zacatecas Silver has expanded the mapped vein system at the Oso Negro project in Sonora, Mexico, to over 3 kilometres. Phase Two rock chip sampling returned high-grade intercepts of up to 20.3 g/t gold and 3,480 g/t silver, confirming continuous mineralization along the Prospecto vein.
Reasoning: Phase Two rock chip sampling significantly extended the mapped vein system from 2km to over 3km and returned high-grade gold and silver intercepts.
Positive factors
- Step-Out Extension
- Bonanza Intercept
- QA/QC Disclosed
Facts used in scoring: 2
Classification and evidence
Step-Out Extensionpositive
Mineralization extended beyond the previously known limit.
Why it applies: Mapped vein strike length extended from 2km to over 3km.
Evidence · text
“Mapped vein strike length has been extended to over 3 kilometres, up from the 2 kilometres reported after Phase One”
Bonanza Interceptpositive
Exceptionally high-grade zone, well above the deposit-type norm.
Why it applies: Returned high-grade intercepts of 20.3 g/t gold and 3,480 g/t silver.
Evidence · text
“grading up to 20.3 g/t gold and 3,480 g/t silver”
QA/QC Disclosedpositive
Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).
Why it applies: Company inserted certified reference materials, blanks and field duplicates.
Evidence · text
“The Company inserted certified reference materials, blanks and field duplicates into the sample stream”
Mill Routeneutral
Processing via mill or concentrator (CIL, CIP, tank leach, flotation).
Why it applies: the document describes a mill_cil route ("CIP")
Extracted facts
Stored fact records: 2. Some facts used in scoring do not have a stored record.
Drill Results (2)
Fact 1Oso Negro · goldGrade: 20.3Grade Unit: g/tView all detailsHide details
Identity
- Project
- Oso Negro
- Commodity
- gold
- Region
- mexico
- Reported Region
- Sonora, Mexico
- Ticker
- ZAC
Geometry
- Grade
- 20.3
- Grade Unit
- g/t
Classification
- Deposit Type
- epithermal
- Program
- exploration
- Sample Type
- surface
Location
- Location
- Oso Negro
- Loc. Source
- document
QA/QC
- Laboratory
- ALS
- QA/QC Disclosed
- Yes
- Lab Certified
- Yes
- QP Signed
- Yes
- QA/QC Methods
- standards, blanks, duplicates
Review
- Needs Review
- No
- Interp. Status
- scored
- Historical
- No
Dates
- Event date
- 2026-09-10T00:00:00.000Z
Reasoning: 20.3 g/t gold is an exceptionally high-grade intercept for an epithermal system.
Positive factors
- Bonanza Intercept
Tags used in scoring
QA/QC Disclosedpositive
Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).
Why it applies: qaqc_disclosed is true
Cut-off Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
Fact 2Oso Negro · silverGrade: 3480Grade Unit: g/tView all detailsHide details
Identity
- Project
- Oso Negro
- Commodity
- silver
- Region
- mexico
- Reported Region
- Sonora, Mexico
- Ticker
- ZAC
Geometry
- Grade
- 3480
- Grade Unit
- g/t
Classification
- Deposit Type
- epithermal
- Program
- exploration
- Sample Type
- surface
Location
- Location
- Oso Negro
- Loc. Source
- document
QA/QC
- Laboratory
- ALS
- QA/QC Disclosed
- Yes
- Lab Certified
- Yes
- QP Signed
- Yes
- QA/QC Methods
- standards, blanks, duplicates
Review
- Needs Review
- No
- Interp. Status
- scored
- Historical
- No
Dates
- Event date
- 2026-09-10T00:00:00.000Z
Reasoning: 3,480 g/t silver is an exceptionally high-grade intercept for an epithermal system.
Positive factors
- Bonanza Intercept
Tags used in scoring
QA/QC Disclosedpositive
Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).
Why it applies: qaqc_disclosed is true
Cut-off Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
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.