ORP: Up to 4.1% U3O8 Rock Chip Samples at McArthur Project NT
Original announcement by asx on
- Company
- Orpheus Uranium Limited
- Ticker
- ORP
- Exchange
- ASX
- Region
- Northern Territory
- Primary commodity
- Uranium
- Secondary commodities
- Copper
- Document categories
- Drill results, Other
- Extracted
- 2026-10-20 23:04:39 UTC
Analysis by Minestarters Atlas
Atlas analysis published:
Minestarters Atlas analysis
Summary
Orpheus Uranium Limited announced high-grade uranium rock chip samples, up to 4.1% U3O8, from its inaugural reconnaissance program at the Conways tenement within the McArthur Project, Northern Territory. These early results, which also included elevated copper grades, represent a new discovery in an underexplored area and are spatially associated with distinct geophysical anomalies. The company is continuing fieldwork and awaiting additional geochemical analysis results to further define the system.
Reasoning: Initial rock chip samples returned exceptional uranium grades up to 4.1% U3O8 and elevated copper, representing a new discovery in an underexplored area with supporting geophysical anomalies, though results are from selective surface samples at an early exploration stage.
Positive factors
- bonanza_grade_uranium
- new_discovery
- elevated_copper_grades
- geophysical_association
- portfolio_diversity
Negative factors
- early_stage_reconnaissance
- selective_samples
- no_field_qaqc
- no_continuity_established
Low confidence — this extraction should be reviewed alongside the original source.
Facts used in scoring: 10
Classification and evidence
Bonanza Interceptpositive
Exceptionally high-grade zone, well above the deposit-type norm.
Why it applies: Rock chip sample CON005 returned 4.1% U3O8, exceeding the 2% U3O8 exceptional threshold for uranium.
Evidence · table
“4.1% U3O8”
Context: 35,598
Bonanza Interceptpositive
Exceptionally high-grade zone, well above the deposit-type norm.
Why it applies: Rock chip sample CON003 returned 3.8% U3O8, exceeding the 2% U3O8 exceptional threshold for uranium.
Evidence · table
“3.8% U3O8”
Context: 32,981
QA/QC Disclosedpositive
Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).
Why it applies: The release includes a Competent Person Statement by Mr Geoffrey Eupene, a Fellow of the Australasian Institute of Mining and Metallurgy, who compiled or reviewed the exploration results.
Evidence · text
“Sections of information contained in this report that relate to Exploration Results were compiled or reviewed by Mr Geoffrey Eupene, BSc (Hons), who is a Fellow of the Australasian Institute of Mining and Metallurgy”
Apparent Width Onlynegative
Interval given as downhole width with no true width or drill orientation — apparent width may overstate true thickness.
Why it applies: The samples are selective point specimens and are not considered representative of the broader mineralisation, with the orientation and continuity of mineralised structures not yet established.
Evidence · text
“Samples are selective point specimens and are not considered representative of the broader mineralisation or average uranium grades within the tenement.”
No QA/QC Disclosurenegative
Release does not disclose QA/QC — lab certification, CP/QP sign-off and assay protocols cannot be checked from this document.
Why it applies: No field standards, blanks, or duplicates were submitted with the samples, relying solely on the laboratory's internal QA/QC procedures.
Evidence · text
“No field standards, blanks or duplicates were submitted. Analytical quality control relied on Intertek Minerals' internal laboratory QA/QC procedures.”
Extracted facts
Stored fact records: 10. Some facts used in scoring do not have a stored record.
Drill Results (10)
CON002McArthur Project · uraniumGrade: 0.8Grade Unit: % U3O8View all detailsHide details
Identity
- Hole ID
- CON002
- Project
- McArthur Project
- Commodity
- uranium
- Region
- australia_nt
- Reported Region
- Northern Territory
- Ticker
- ORP
Geometry
- Grade
- 0.8
- Grade Unit
- % U3O8
Classification
- Program
- exploration
- Sample Type
- surface
- Group ID
- CON002
- Mining Method
- unknown
Location
- Easting
- 333119
- Northing
- 8436596
- CRS
- GDA94 UTM Zone 53
- EPSG
- 28353
- Loc. Confidence
- high
- Loc. Source
- document
QA/QC
- Laboratory
- Intertek
- QA/QC Disclosed
- Yes
- QP Signed
- Yes
Review
- Needs Review
- No
- Interp. Status
- scored
- Historical
- No
Dates
- Event date
- 2026-10-20T00:00:00.000Z
Reasoning: Rock chip sample CON002 returned 0.8% U3O8, which is a strong grade for uranium, indicating a new discovery.
Positive factors
- strong_grade_uranium
- new_discovery
Negative factors
- selective_sample
- no_field_qaqc
- no_continuity_established
Evidence · table
“0.8”
Context: 7,120
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
CON002McArthur Project · copperGrade: 0.091Grade Unit: %View all detailsHide details
Identity
- Hole ID
- CON002
- Project
- McArthur Project
- Commodity
- copper
- Region
- australia_nt
- Reported Region
- Northern Territory
- Ticker
- ORP
Geometry
- Grade
- 0.091
- Grade Unit
- %
Classification
- Program
- exploration
- Sample Type
- surface
- Group ID
- CON002
- Mining Method
- unknown
Location
- Easting
- 333119
- Northing
- 8436596
- CRS
- GDA94 UTM Zone 53
- EPSG
- 28353
- Loc. Confidence
- high
- Loc. Source
- document
QA/QC
- Laboratory
- Intertek
- QA/QC Disclosed
- Yes
- QP Signed
- Yes
Review
- Needs Review
- No
- Interp. Status
- scored
- Historical
- No
Dates
- Event date
- 2026-10-20T00:00:00.000Z
Reasoning: Rock chip sample CON002 returned 0.091% copper, which is an elevated grade for a byproduct, supporting the polymetallic nature of the discovery.
Positive factors
- elevated_copper
Negative factors
- selective_sample
- no_field_qaqc
- no_continuity_established
Evidence · table
“910”
Context: 7,120
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
CON003McArthur Project · uraniumGrade: 3.8Grade Unit: % U3O8View all detailsHide details
Identity
- Hole ID
- CON003
- Project
- McArthur Project
- Commodity
- uranium
- Region
- australia_nt
- Reported Region
- Northern Territory
- Ticker
- ORP
Geometry
- Grade
- 3.8
- Grade Unit
- % U3O8
Classification
- Program
- exploration
- Sample Type
- surface
- Group ID
- CON003
- Mining Method
- unknown
Location
- Easting
- 333108
- Northing
- 8436625
- CRS
- GDA94 UTM Zone 53
- EPSG
- 28353
- Loc. Confidence
- high
- Loc. Source
- document
QA/QC
- Laboratory
- Intertek
- QA/QC Disclosed
- Yes
- QP Signed
- Yes
Review
- Needs Review
- No
- Interp. Status
- scored
- Historical
- No
Dates
- Event date
- 2026-10-20T00:00:00.000Z
Reasoning: Rock chip sample CON003 returned 3.8% U3O8, which is an exceptional grade for uranium, highlighting significant potential.
Positive factors
- exceptional_grade_uranium
- new_discovery
Negative factors
- selective_sample
- no_field_qaqc
- no_continuity_established
Evidence · table
“3.8”
Context: 32,981
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
CON003McArthur Project · copperGrade: 0.8577Grade Unit: %View all detailsHide details
Identity
- Hole ID
- CON003
- Project
- McArthur Project
- Commodity
- copper
- Region
- australia_nt
- Reported Region
- Northern Territory
- Ticker
- ORP
Geometry
- Grade
- 0.8577
- Grade Unit
- %
Classification
- Program
- exploration
- Sample Type
- surface
- Group ID
- CON003
- Mining Method
- unknown
Location
- Easting
- 333108
- Northing
- 8436625
- CRS
- GDA94 UTM Zone 53
- EPSG
- 28353
- Loc. Confidence
- high
- Loc. Source
- document
QA/QC
- Laboratory
- Intertek
- QA/QC Disclosed
- Yes
- QP Signed
- Yes
Review
- Needs Review
- No
- Interp. Status
- scored
- Historical
- No
Dates
- Event date
- 2026-10-20T00:00:00.000Z
Reasoning: Rock chip sample CON003 returned 0.8577% copper, which is a strong grade for a byproduct, further enhancing the discovery.
Positive factors
- strong_grade_copper
Negative factors
- selective_sample
- no_field_qaqc
- no_continuity_established
Evidence · table
“8,577”
Context: 32,981
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
CON004McArthur Project · uraniumGrade: 1.6Grade Unit: % U3O8View all detailsHide details
Identity
- Hole ID
- CON004
- Project
- McArthur Project
- Commodity
- uranium
- Region
- australia_nt
- Reported Region
- Northern Territory
- Ticker
- ORP
Geometry
- Grade
- 1.6
- Grade Unit
- % U3O8
Classification
- Program
- exploration
- Sample Type
- surface
- Group ID
- CON004
- Mining Method
- unknown
Location
- Easting
- 333116
- Northing
- 8436620
- CRS
- GDA94 UTM Zone 53
- EPSG
- 28353
- Loc. Confidence
- high
- Loc. Source
- document
QA/QC
- Laboratory
- Intertek
- QA/QC Disclosed
- Yes
- QP Signed
- Yes
Review
- Needs Review
- No
- Interp. Status
- scored
- Historical
- No
Dates
- Event date
- 2026-10-20T00:00:00.000Z
Reasoning: Rock chip sample CON004 returned 1.6% U3O8, which is a strong grade for uranium, supporting the prospectivity of the area.
Positive factors
- strong_grade_uranium
- new_discovery
Negative factors
- selective_sample
- no_field_qaqc
- no_continuity_established
Evidence · table
“1.6”
Context: 13,704
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
CON004McArthur Project · copperGrade: 0.2502Grade Unit: %View all detailsHide details
Identity
- Hole ID
- CON004
- Project
- McArthur Project
- Commodity
- copper
- Region
- australia_nt
- Reported Region
- Northern Territory
- Ticker
- ORP
Geometry
- Grade
- 0.2502
- Grade Unit
- %
Classification
- Program
- exploration
- Sample Type
- surface
- Group ID
- CON004
- Mining Method
- unknown
Location
- Easting
- 333116
- Northing
- 8436620
- CRS
- GDA94 UTM Zone 53
- EPSG
- 28353
- Loc. Confidence
- high
- Loc. Source
- document
QA/QC
- Laboratory
- Intertek
- QA/QC Disclosed
- Yes
- QP Signed
- Yes
Review
- Needs Review
- No
- Interp. Status
- scored
- Historical
- No
Dates
- Event date
- 2026-10-20T00:00:00.000Z
Reasoning: Rock chip sample CON004 returned 0.2502% copper, which is an elevated grade for a byproduct.
Positive factors
- elevated_copper
Negative factors
- selective_sample
- no_field_qaqc
- no_continuity_established
Evidence · table
“2,502”
Context: 13,704
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
CON004aMcArthur Project · uraniumGrade: 0.01Grade Unit: % U3O8View all detailsHide details
Identity
- Hole ID
- CON004a
- Project
- McArthur Project
- Commodity
- uranium
- Region
- australia_nt
- Reported Region
- Northern Territory
- Ticker
- ORP
Geometry
- Grade
- 0.01
- Grade Unit
- % U3O8
Classification
- Program
- exploration
- Sample Type
- surface
- Group ID
- CON004a
- Mining Method
- unknown
Location
- Easting
- 333116
- Northing
- 8436620
- CRS
- GDA94 UTM Zone 53
- EPSG
- 28353
- Loc. Confidence
- high
- Loc. Source
- document
QA/QC
- Laboratory
- Intertek
- QA/QC Disclosed
- Yes
- QP Signed
- Yes
Review
- Needs Review
- No
- Interp. Status
- scored
- Historical
- No
Dates
- Event date
- 2026-10-20T00:00:00.000Z
Reasoning: Soil sample CON004a returned 0.01% U3O8, which is a low grade but provides geochemical characterization.
Negative factors
- low_grade
- soil_sample
- selective_sample
- no_field_qaqc
- no_continuity_established
Evidence · table
“0.01”
Context: 118
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
CON004aMcArthur Project · copperGrade: 0.0256Grade Unit: %View all detailsHide details
Identity
- Hole ID
- CON004a
- Project
- McArthur Project
- Commodity
- copper
- Region
- australia_nt
- Reported Region
- Northern Territory
- Ticker
- ORP
Geometry
- Grade
- 0.0256
- Grade Unit
- %
Classification
- Program
- exploration
- Sample Type
- surface
- Group ID
- CON004a
- Mining Method
- unknown
Location
- Easting
- 333116
- Northing
- 8436620
- CRS
- GDA94 UTM Zone 53
- EPSG
- 28353
- Loc. Confidence
- high
- Loc. Source
- document
QA/QC
- Laboratory
- Intertek
- QA/QC Disclosed
- Yes
- QP Signed
- Yes
Review
- Needs Review
- No
- Interp. Status
- scored
- Historical
- No
Dates
- Event date
- 2026-10-20T00:00:00.000Z
Reasoning: Soil sample CON004a returned 0.0256% copper, which is a low grade but provides geochemical characterization.
Negative factors
- low_grade
- soil_sample
- selective_sample
- no_field_qaqc
- no_continuity_established
Evidence · table
“256”
Context: 118
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
CON005McArthur Project · uraniumGrade: 4.1Grade Unit: % U3O8View all detailsHide details
Identity
- Hole ID
- CON005
- Project
- McArthur Project
- Commodity
- uranium
- Region
- australia_nt
- Reported Region
- Northern Territory
- Ticker
- ORP
Geometry
- Grade
- 4.1
- Grade Unit
- % U3O8
Classification
- Program
- exploration
- Sample Type
- surface
- Group ID
- CON005
- Mining Method
- unknown
Location
- Easting
- 333122
- Northing
- 8436614
- CRS
- GDA94 UTM Zone 53
- EPSG
- 28353
- Loc. Confidence
- high
- Loc. Source
- document
QA/QC
- Laboratory
- Intertek
- QA/QC Disclosed
- Yes
- QP Signed
- Yes
Review
- Needs Review
- No
- Interp. Status
- scored
- Historical
- No
Dates
- Event date
- 2026-10-20T00:00:00.000Z
Reasoning: Rock chip sample CON005 returned 4.1% U3O8, which is an exceptional, bonanza-grade for uranium, representing the highest grade in the program.
Positive factors
- bonanza_grade_uranium
- new_discovery
Negative factors
- selective_sample
- no_field_qaqc
- no_continuity_established
Evidence · table
“4.1”
Context: 35,598
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
CON005McArthur Project · copperGrade: 0.5515Grade Unit: %View all detailsHide details
Identity
- Hole ID
- CON005
- Project
- McArthur Project
- Commodity
- copper
- Region
- australia_nt
- Reported Region
- Northern Territory
- Ticker
- ORP
Geometry
- Grade
- 0.5515
- Grade Unit
- %
Classification
- Program
- exploration
- Sample Type
- surface
- Group ID
- CON005
- Mining Method
- unknown
Location
- Easting
- 333122
- Northing
- 8436614
- CRS
- GDA94 UTM Zone 53
- EPSG
- 28353
- Loc. Confidence
- high
- Loc. Source
- document
QA/QC
- Laboratory
- Intertek
- QA/QC Disclosed
- Yes
- QP Signed
- Yes
Review
- Needs Review
- No
- Interp. Status
- scored
- Historical
- No
Dates
- Event date
- 2026-10-20T00:00:00.000Z
Reasoning: Rock chip sample CON005 returned 0.5515% copper, which is a strong grade for a byproduct, further enhancing the discovery.
Positive factors
- strong_grade_copper
Negative factors
- selective_sample
- no_field_qaqc
- no_continuity_established
Evidence · table
“5,515”
Context: 35,598
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.