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
- 2026-09-12 00:48:32 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Zacatecas Silver reported high-grade rock chip sampling results from Phase Two at the Oso Negro project in Sonora, Mexico, with gold up to 20.3 g/t and silver up to 3,480 g/t. The program extended the mapped vein system to over 3 kilometres and confirmed continuous mineralization along the 600-metre Prospecto vein.
Reasoning: Phase Two rock chip sampling returned high-grade gold and silver intercepts and extended the mapped vein system to over 3km, confirming continuity along the Prospecto vein.
Positive factors
- High-grade surface intercepts
- System expansion
- QA/QC disclosed
- Continuous mineralization
Facts used in scoring: 2
Classification and evidence
QA/QC Disclosedpositive
Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).
Why it applies: The release mentions the use of certified reference materials, blanks, and field duplicates.
Evidence · text
“The Company inserted certified reference materials, blanks and field duplicates into the sample stream”
Step-Out Extensionpositive
Mineralization extended beyond the previously known limit.
Why it applies: Mapped vein strike length was extended from 2 km to over 3 km.
Evidence · text
“Mapped vein strike length has been extended to over 3 kilometres”
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
- 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
Deleterious
- Deleterious Flag
- No
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 a high-grade intercept for an epithermal system.
Positive factors
- Bonanza Intercept
Evidence · text
“individual grab samples grading up to 20.3 g/t gold”
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
Rejected tags
Rejected tags — excluded from scoring because their label or evidence could not be verified.
Bonanza InterceptRejected · positive
Exceptionally high-grade zone, well above the deposit-type norm.
Reason: 20.3 g/t gold is a high-grade intercept for an epithermal system.
Evidence · text
“up to 20.3 g/t gold”
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
- 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
Deleterious
- Deleterious Flag
- No
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.
Positive factors
- Bonanza Intercept
Evidence · text
“3,480 g/t silver”
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
Rejected tags
Rejected tags — excluded from scoring because their label or evidence could not be verified.
Bonanza InterceptRejected · positive
Exceptionally high-grade zone, well above the deposit-type norm.
Reason: 3,480 g/t silver is an exceptionally high-grade intercept.
Evidence · text
“3,480 g/t silver”
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.