Significant HREE, Gold and Uranium Potential - Bresnahan
Released
Released
Announcement PDF
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ASX ANNOUNCEMENT
26 October 2023
SIGNIFCANT HREE, GOLD & URANIUM POTENTIAL - BRESNAHAN (100%)
HIGHLIGHTS
•
Dreadnought has completed a review of historical exploration, recently acquired geophysical
data and plans for first pass work over the ~4,700 kms2, 100% owned, Bresnahan HREE, Au-AgSb, U Project (“Bresnahan”).
•
Bresnahan was acquired in August 2022 as a prospective region for unconformity heavy rare
earths (“HREE”), unconformity uranium and gold.
•
The Bresnahan Basin is one of Western Australia’s known uranium provinces containing the
Angelo River deposit and having been previously explored by Cameco, U3O8 and Vale from
~2005-2012 and CRA, Pancontinental and Uranerz from ~1978-1990.
•
Dreadnought has now consolidated the largest landholding in this region with known HREE,
uranium and gold/silver/antimony (“Au-Ag-Sb”) mineralisation. Bresnahan contains significant
undrilled historical targets defined by previous uranium explorers.
•
In addition to the previously disclosed HREE and Au-Ag-Sb results (ASX 8 February 2023):
BBRK0046: 1.33% TREO (31% NdPr:TREO and 25% HREE:TREO)
BBRK0050: 1.21% TREO (30% NdPr:TREO and 19% HREE:TREO)
BBRK0012: 11.8 g/t Au, 650 g/t Ag, 2.9% Sb
BBRK0013: 11.9 g/t Au, 710 g/t Ag, 0.5% Sb
There are significant uranium results from recently acquired and historical surface sampling,
including:
•
BBRK0021: 0.24% U3O8
BBRK0023: 0.24% U3O8
BBRK0019: 0.19% U3O8
1851: 0.29% U3O8
BBRK0020: 0.13% U3O8
BBRK0022: 0.12% U3O8
Surface sampling over HREE-Au-U targets, plus a project wide ultrafine stream sediment survey
will commence in November 2023 with results expected in the March 2024 quarter. Given the
significant uranium results and targets, uranium will now form part of our core focus.
Dreadnought Resources Limited (“Dreadnought”) is pleased to announce an update on
exploration activities within Dreadnought’s 100% owned Bresnahan HREE, Au-Ag-Sb, U
project located in the Ashburton Region of Western Australia.
Dreadnought’s Managing Director, Dean
Tuck, commented: “Dreadnought moved on
the Bresnahan Basin because it was a known
unconformity uranium province as the
uranium system is well understood and shares
a mineral system with the recently published
hard rock heavy rare earth systems like those
seen in the Athabasca Basin and Browns
Range. The exploration for uranium is a
natural addition to the assessment of the
consolidated project area as we look to unlock
the region’s potential.”
Figure 1: Photo of a major structural corridor
at Bresnahan with the development of ladder
veins standing out prominently within highly
altered sediments of the Wyloo Group.
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SNAPSHOT – Bresnahan HREE, Au-Ag-Sb and Uranium
Large Scale Project, Next Door to Pilbara Infrastructure - World’s Top Investment Jurisdiction
•
~4,700 kms2 of tenure, 100% owned, located in the underexplored Ashburton Region of Western Australia on
the doorstep of Pilbara iron ore infrastructure.
•
Critical minerals, in the world’s top investment jurisdiction, Western Australia, based on the Investment
Attractiveness Index published in the Fraser Institute’s Annual Survey of Mining Companies.
•
Limited and fragmented historical exploration. Dreadnought is the first explorer to consolidate the region and
to undertake detailed geophysical and cutting edge modern geochemical techniques for the exploration and
discovery of multiple commodities.
New Search Space for HREE – Major Discovery Potential
•
The Bresnahan Basin is a conceptual unconformity heavy rare earth province with a similar geological setting to
the Athabasca Basin in Canada and Browns Range in Western Australia. These settings are home to the few
known hard rock HREE (including high value dysprosium and terbium “Dy-Tb”) deposits.
•
HREE mineralisation was first identified in the region in 2008. However, the significance of the mineralisation
was not recognised until the publication of the unconformity HREE model by Northern Minerals Ltd (ASX:NTU)
and The Australian National University (“ANU”).
•
HREE mineralisation, alteration and pathfinder geochemistry, similar to Browns Range, has been confirmed at
Bresnahan with significant results including (ASX 8 February 2023):
BBRK0046: 1.33% TREO (25% HREE:TREO)
•
BBRK0050: 1.21% TREO (19% HREE:TREO)
The opening of new search spaces is one of the greatest lead indicators of major discoveries.
High-Grade Au-Ag-Sb
•
Similar lithostructural setting to the Paulsens and Mt Olympus gold deposits.
•
Rock chips from the Monster Au-Ag-Sb prospect include (ASX 8 February 2023):
BBRK0012: 11.8 g/t Au, 650 g/t Ag, 2.9% Sb
BBRK0013: 11.9 g/t Au, 710 g/t Ag, 0.5% Sb
Proven Uranium Province with Untested Targets Defined by Major Companies
•
Historical exploration by major uranium miners including CRA, Pancontinental and Uranerz started in the 1970s
through early 1990s and resulted in the discovery of outcropping mineralisation at the Bresnahan unconformity
including the Angelo River deposit.
•
Second wave of uranium exploration led by Cameco, Vale and U3O8 deployed airborne EM for the first time to
identify targets under the shallow dipping Bresnahan Basin – all high quality and never drilled due to low uranium
prices.
•
Outcropping mineralisation at Bresnahan is high-grade and includes:
BBRK0021: 0.24% U3O8
BBRK0023: 0.24% U3O8
1851: 0.29% U3O8
Global Energy Decarbonisation Driving HREE (Dy, Tb) and Uranium Fundamentals
•
Supply chain security and low carbon transition are imperatives against a backdrop of heightened geopolitical
tension.
•
The World Nuclear Association forecasts that global demand for uranium could double by 2040, from 65k
tonnes to 130k tonnes as the world looks to replace high carbon intensity electrical generation with low carbon
nuclear power generation. (WNA Nuclear Fuel Report: Global Scenarios 2023-2040, September 2023).
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Exploration Plan – Target Generation and Definition HREEs, Au-Ag-Sb, U
The planned exploration program at Bresnahan is multi-faceted with three key initial objectives:
1. Define HREE geochemical targets along key mineralised structures within the Wyloo and Bresnahan Basin
sediments through surface sampling and geological mapping;
2. Define uranium geochemical targets associated with radiometric anomalies and spectral defined iron and
clay alteration through surface sampling, ground radiometric surveys and geological mapping; and
3. Generate HREE, Au-Ag-Sb, U geochemical anomalies through project wide ultrafine fraction stream
sediment sampling.
The program will commence in November 2023 and will run for several months on a campaign basis with results
expected commencing in the March 2024 quarter.
The program has been designed around the significant geophysical datasets acquired and interpreted by
Dreadnought with input from historical and reconnaissance exploration work. Systematic soil sampling, rock
chipping and geological mapping is expected to identify outcropping mineralisation and define soil anomalies
associated with prospective geological alteration and structural deformation. This work should result in drill targets
during 2024.
In addition, to ensure that no significant outcropping or near surface mineralisation is missed, a project wide ultrafine
fraction stream sediment sampling program will be undertaken.
Figure 2: Plan view map of Bresnahan showing the location of mineralised rock chips and prospects in relation to the major
structures and the Bresnahan-Wyloo unconformity.
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Unconformity HREE (Dy and Tb) Potential (E52/3356, E52/3936, E52/3937, E52/4083, E52/4139, E52/4141, E52/4142,
E52/4143, E52/4144, E52/4147, E52/4228, E52/3412 and E52/3462: DRE 100%)
Bresnahan is a conceptual unconformity HREE project focused around the Bresnahan Basin. The unconformable
contact between the Bresnahan Basin sediments and the underlying Wyloo Group sediments is interpreted to be a
similar geological setting to that seen at the Athabasca Basin in Canada and Browns Range in Western Australia.
These settings form the basis of the unconformity HREE model, originally published in 2018 in collaboration with
Northern Minerals Ltd. HREEs were identified within the Bresnahan Basin as early as 2008; however, their
significance was not recognised due to the lack of a coherent geological model.
The unconformity HREE model contains many system analogies with the unconformity uranium model. However,
the precipitation mechanisms between HREEs (fluid mixing) and U (reduction) are significantly different.
Accordingly, while these two styles of mineralisation are related, the HREEs are often not directly associated with
the uranium mineralisation.
In November 2022, a two-day reconnaissance program was undertaken to collect surface samples along significant
structural trends and geophysical anomalies to confirm HREE mineralisation and associated pathfinders. In total, 17
locations were visited along the unconformity and basement structures. This program confirmed significant
alteration, veining, brecciation and related hematite and manganese alteration associated with prospective
structures. In 2023, large airborne magnetic and radiometric surveys were flown over the project and merged with
historical surveys to assist with targeting.
In addition to HREEs, assays confirmed widespread pathfinder association along all major structures. Given the
reconnaissance nature of the program, this is a resounding success and confirmation that Bresnahan has significant
potential to host unconformity HREEs.
Figure 3: Schematic cross section of the unconformity HREE model, modified from the Browns Range model, showing the
possible locations of HREE mineralisation in relation to host lithologies and major structures.
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Unconformity Uranium Potential (E52/3356, E52/3936, E52/3937, E52/4083, E52/4139, E52/4141, E52/4142, E52/4143,
E52/4144, E52/4147, E52/4228, E52/3412 and E52/3462: DRE 100%)
The majority of Australia's uranium occurs in four types of deposit styles:
•
iron oxide breccia complexes (Olympic Dam);
•
sandstone deposits (Beverley, Honeymoon);
•
palaeochannel/calcrete deposits (Yeelirrie, Lake Way); and
•
unconformity-related deposits (Jabiluka, Ranger).
Unconformity-type uranium deposits are developed along the contact between younger sandstone cover and
underlying crystalline basement rocks. Mineralisation may extend up to 400m into the underlying basement rocks.
The distribution of the grades and sizes of unconformity-related deposits is related to their setting with respect to
the unconformity and type of host rocks. In Australia, unconformity-related deposits are relatively large and highgrade with the Jabiluka and Ranger orebodies grading between 0.20% to 0.39% U3O8. (Australia’s Uranium Resources, Geology,
and Development of Deposits. Geoscience Australia Mineral Resource Report 1 (2001))
Bresnahan is a major consolidation of a proven uranium province with geological similarities to the globally significant
Alligator River Uranium Field (“ARUF”) which hosts Jabiluka and Ranger.
This similarity encouraged historical exploration at Bresnahan by uranium miners including CRA, Pancontinental
and Uranerz in the 1970s through early 1990s. Exploration was focused on testing for sandstone hosted
mineralisation (CRA) and unconformity hosted mineralisation (Pancontinental). This work resulted in the discovery
of outcropping mineralisation at the Bresnahan unconformity including the Angelo River deposit.
A second wave of uranium exploration led by Cameco, Vale and U3O8 deployed airborne EM for the first time to
identify targets under the shallow dipping Bresnahan Basin - all largely focused on the unconformity model. In 2007
Cameco justified its involvement in the region by stating:
“Previous exploration in the area has recognised the analogies with the ARUF, and unconformity related mineralisation has
been the main model used. The exploration has focused on the Bresnahan/basement unconformity, with traditional
exploration, particularly by Pancontinental and Uranerz, based on using systematic airborne or ground radiometrics to locate
uranium anomalies. There is very limited scope for further discoveries using this approach, or for extending resources at the
known prospects, particularly Angelo River, which has been thoroughly drilled. However, the Bresnahan sandstone covered
areas have received very little attention and there is good potential for further uranium mineralisation beneath sandstone
cover.”
The surveys conducted by Cameco, Vale and U3O8 successfully identified reactive trap sites in close proximity to
the Bresnahan unconformity and other structures. Several priority targets were defined but never drilled due to
low uranium prices.
In addition, recently defined radiometric anomalies within the highly altered and deformed Wyloo Group Sediments
hosted within the main Bresnahan Dome and cut by the crustal scale Baring Downs and Blair Faults, represent near
drill ready targets.
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Background on Bresnahan (E52/3356, E52/3936, E52/3937, E52/4083, E52/4139, E52/4141, E52/4142, E52/4143, E52/4144,
E52/4147, E52/4228, E52/3412 and E52/3462: DRE 100%)
Bresnahan is located ~125km southwest of Newman in the Ashburton Basin. The project comprises ~4,700kms2
covering >200kms strike along the Bresnahan Basin/Wyloo Group unconformity. Bresnahan is prospective for hard
rock HREE (Dy and Tb) deposits similar to Browns Range, mesothermal lode gold similar to the Paulsens Au-AgSb deposits along strike and high-grade unconformity uranium mineralisation near the lower contact of the
Bresnahan Basin and underlying reducing sediments.
Bresnahan is a significant first mover opportunity to explore for unconformity HREE, Au-Ag-Sb and U. In addition,
this is a major consolidation of a significant proven uranium province having been targeted for exploration by global
uranium miners including Cameco, CRA, Pancontinental and Vale.
Figure 4: Plan view regional map of Bresnahan showing the location in relation to major towns, infrastructure and mines.
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For further information please refer to previous ASX announcements:
• 26 October 2022
Tenement Acquisitions
• 8 February 2023
Bresnahan Emerging as a Light & Heavy Rare Earth Province
• 4 October 2023
Bresnahan Acquisition & Consolidation
UPCOMING NEWSFLOW
October: DHEM and further assay results from the Money Intrusion (Mangaroon Ni-Cu-PGE Earn-in)
October: Drilling results from completed drilling at Mangaroon REE (100%)
October: Quarterly Activities and Cashflow Report
November: RC drilling at Mangaroon Au (100%)
November: REE Resource upgrade (Mangaroon 100%)
November: Results of geophysical and geochemical surveys at Central Yilgarn (100%)
November: Results from target generation and definition work at Bresnahan (100%)
23 November: Annual General Meeting
December: Assays from drilling at Tarraji-Yampi (80%, 100%)
December-February 2024: Assay results from Ni-Cu-PGE and Au drilling at Mangaroon.
March 2024: Commencement of RC and Diamond Drilling at Mangaroon Ni-Cu-PGE (Earin-in)
March/April 2024: Commencement of RC drilling at Mangaroon Rare Earths (100%)
~Ends~
For further information please contact:
Dean Tuck
Managing Director
Dreadnought Resources Limited
E: dtuck@dreres.com.au
Jessamyn Lyons
Company Secretary
Dreadnought Resources Limited
E: jlyons@dreres.com.au
This announcement is authorised for release to the ASX by the Board of Dreadnought.
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Table 1: Significant (>0.1% U3O8) Uranium Rock Chip Results
Sample ID
BBRK0021
BBRK0023
BBRK0019
BBRK0020
BBRK0022
BBRK0017
784
782
783
779
1851
Company
DRE
DRE
DRE
DRE
DRE
DRE
U308
U308
U308
U308
U308
Easting
616253
616169
616419
616419
616185
616439
640880
640880
640858
640925
616265
Northing
7350154
7350196
7350135
7350136
7350210
7350129
7369729
7369729
7369737
7369738
7350134
U3O8 (%)
0.24%
0.24%
0.19%
0.13%
0.12%
0.10%
1.03%
0.52%
0.60%
0.15%
0.29%
Prospect
Xanadu
Xanadu
Xanadu
Xanadu
Xanadu
Xanadu
Canyon Creek
Canyon Creek
Canyon Creek
Canyon Creek
Xanadu
Cautionary Statement
This announcement and information, opinions or conclusions expressed in the course of this announcement contains forecasts and
forward-looking information. Such forecasts, projections and information are not a guarantee of future performance, involve unknown
risks and uncertainties. Actual results and developments will almost certainly differ materially from those expressed or implied. There
are a number of risks, both specific to Dreadnought, and of a general nature which may affect the future operating and financial
performance of Dreadnought, and the value of an investment in Dreadnought including and not limited to title risk, renewal risk,
economic conditions, stock market fluctuations, commodity demand and price movements, timing of access to infrastructure, timing
of environmental approvals, regulatory risks, operational risks, reliance on key personnel, reserve estimations, native title risks, cultural
heritage risks, foreign currency fluctuations, and mining development, construction and commissioning risk.
*The Exploration Target listed within the Investment Highlights has been prepared and reported in accordance with the 2012 edition
of the JORC Code. The potential quality and grade of the Exploration Target is conceptual in nature. There has been insufficient
exploration to estimate a Resource for all target areas reported. It is uncertain if further exploration will result in the estimation of a
Resource.
Disclaimer
References in this announcement may have been made to certain previous ASX announcements, which in turn may have included
Exploration Results, Exploration Targets, Mineral Resources, Ore Reserves and the results of Pre-Feasibility Studies. For full details,
please refer to the said announcement on the said date. The Company is not aware of any new information or data that materially
affects this information. Other than as specified in this announcement and mentioned announcements, the Company confirms it is
not aware of any new information or data that materially affects the information included in the original market announcement(s),
and in the case of estimates of Mineral Resources that all material assumptions and technical parameters underpinning the estimates
in the relevant announcement continue to apply and have not materially changed. The Company confirms that the form and context
in which the Competent Person’s findings are presented have not been materially modified from the original announcement.
Competent Person’s Statement – Exploration Results
The information in this announcement that relates to geology, exploration results and planning, and exploration targets was compiled
by Mr. Dean Tuck, who is a Member of the AIG, Managing Director, and shareholder of the Company. Mr. Tuck has sufficient
experience which is relevant to the style of mineralisation and type of deposit under consideration and to the activity being undertaken
to qualify as a Competent Person as defined in the 2012 Edition of the 'Australasian Code for Reporting of Exploration Results,
Mineral Resources and Ore Reserves'. Mr. Tuck consents to the inclusion in the announcement of the matters based on the
information in the form and context in which it appears.
The Company confirms that it is not aware of any new information or data that materially affects the information in the original
reports, and that the forma and context in which the Competent Person’s findings are presented have not been materially modified
from the original reports.
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INVESTMENT HIGHLIGHTS
Kimberley Ni-Cu-Au Project (80/100%)
The project is located only 85kms from Derby in the
West Kimberley region of WA and was locked up as a
Defence Reserve since 1978.
The project has outcropping mineralisation and historic
workings which have seen no modern exploration.
Results to date indicate that there may be a related,
large scale, Proterozoic Cu-Au-Ag-Bi-Sb-Co system at
Tarraji-Yampi, similar to Cloncurry/Mt Isa and Tennant
Creek.
Mangaroon Ni-Cu-PGE JV & Au/REE 100%
Project
Mangaroon covers ~5,200kms and is located 250kms
south-east of Exmouth in the Gascoyne Region of WA.
At the Money Ni-Cu-PGE has been identified and is
subject to an earn-in by First Quantum Minerals (up to
70%). Dreadnought also has areas of outcropping highgrade gold including the historic Star of Mangaroon and
Diamonds gold mines. In addition, Mangaroon has
emerged as a globally significant, rapidly growing,
potential source of critical minerals. Highlights include:
-
An Exploration Target* of 50-100Mt at 0.9-1.3%
TREO estimated for the top 150m of the ~43km
long Yin REE Ironstone Complex (ASX 13 Feb 2023).
-
An independent Resource for Yin Ironstones
Complex of 20.06Mt @ 1.03% TREO over only ~4kms – including an Indicated Resource of 5.52Mt @ 1.23%
TREO over just 250m strike (ASX 5 Jul 2023).
-
Regional source of rare earths at the Gifford Creek Carbonatite totaling >17kms x ~1km (ASX 7 Aug 2023).
-
A large, independent initial Resource of 10.84Mt @ 1.00% TREO, containing a range of critical minerals
including rare earths, niobium, phosphate, titanium and scandium (ASX 28 Aug 2023).
Bresnahan HREE, Au-Ag-Sb and U Project (100%)
Bresnahan is located ~125km southwest of Newman in the Ashburton Basin. The project comprises ~3,700kms2
covering over 200kms strike along the Bresnahan Basin / Wyloo Group unconformity. Bresnahan is prospective for
unconformity related heavy rare earth (“HREE”) deposits similar to Browns Range HREE deposits and mesothermal
lode gold similar to Paulsen’s Au-Ag-Sb deposits along strike.
Prior to consolidation by Dreadnought, the Bresnahan Basin had only been explored for unconformity uranium with
limited exploration for mesothermal gold. Bresnahan is a first mover opportunity to explore for unconformity HREE
and U.
Central Yilgarn Gold, Base Metals, Critical Minerals & Iron Ore Project (100%)
Central Yilgarn is located ~190km northwest of Kalgoorlie in the Yilgarn Craton. The project comprises ~1,600 sq
kms covering ~150km of strike along the majority of the Illaara, Yerilgee and Evanston greenstone belts. Central
Yilgarn is prospective for typical Archean mesothermal lode gold deposits, VMS base metals, komatiite hosted nickel
sulphides and critical metals including Lithium-Caesium-Tantalum.
Prior to consolidation by Dreadnought, the Central Yilgarn was predominantly held by iron ore explorers and
remains highly prospective for iron ore.
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JORC Code, 2012 Edition – Table 1 Report Template
Section 1 Sampling Techniques and Data
(Criteria in this section apply to all succeeding sections.)
Criteria
JORC Code explanation
Commentary
Sampling techniques
•
Rock Chips
•
•
•
Drilling techniques
•
Drill sample recovery
•
•
•
Logging
•
•
•
Sub-sampling
techniques and sample
preparation
•
•
•
•
•
•
Quality of assay data
and laboratory tests
•
•
Nature and quality of sampling (e.g. cut channels, random
chips, or specific specialised industry standard
measurement tools appropriate to the minerals under
investigation, such as down hole gamma sondes, or
handheld XRF instruments, etc.). These examples should
not be taken as limiting the broad meaning of sampling.
Include reference to measures taken to ensure sample
representivity and the appropriate calibration of any
measurement tools or systems used.
Aspects of the determination of mineralisation that are
Material to the Public Report.
In cases where ‘industry standard’ work has been done
this would be relatively simple (e.g. ‘reverse circulation
drilling was used to obtain 1 m samples from which 3 kg
was pulverised to produce a 30 g charge for fire assay’).
In other cases more explanation may be required, such as
where there is coarse gold that has inherent sampling
problems. Unusual commodities or mineralisation types
(e.g. submarine nodules) may warrant disclosure of
detailed information.
Drill type (e.g. core, reverse circulation, open-hole
hammer, rotary air blast, auger, Bangka, sonic, etc.) and
details (e.g. core diameter, triple or standard tube, depth
of diamond tails, face-sampling bit or other type, whether
core is oriented and if so, by what method, etc.).
Method of recording and assessing core and chip sample
recoveries and results assessed.
Measures taken to maximise sample recovery and ensure
representative nature of the samples.
Whether a relationship exists between sample recovery
and grade and whether sample bias may have occurred
due to preferential loss/gain of fine/coarse material.
Whether core and chip samples have been geologically
and geotechnically logged to a level of detail to support
appropriate Mineral Resource estimation, mining studies
and metallurgical studies.
Whether logging is qualitative or quantitative in nature.
Core (or costean, channel, etc.) photography.
The total length and percentage of the relevant
intersections logged.
If core, whether cut or sawn and whether quarter, half or
all core taken.
If non-core, whether riffled, tube sampled, rotary split, etc.
and whether sampled wet or dry.
For all sample types, the nature, quality and
appropriateness of the sample preparation technique.
Quality control procedures adopted for all sub-sampling
stages to maximise representivity of samples.
Measures taken to ensure that the sampling is
representative of the in-situ material collected, including
for instance results for field duplicate/second-half
sampling.
Whether sample sizes are appropriate to the grain size
of the material being sampled.
The nature, quality and appropriateness of the assaying
and laboratory procedures used and whether the
technique is considered partial or total.
For geophysical tools, spectrometers, handheld XRF
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Rock Chips were collected by Dreadnought staff and
submitted for analysis. Rock chips are random, subject to
bias and often unrepresentative for the typical widths
required for economic consideration. They are by nature
difficult to duplicate with any acceptable form of precision
or accuracy.
Rock chips have been collected by Dreadnought to assist in
characterising different lithologies, alterations and
expressions of mineralisation. In many instances, several
rock chips were collected from a single location to assist
with characterising and understanding the different
lithologies, alterations and expressions of mineralisation
present at the locality.
Rock chips were submitted to ALS Laboratories in Perth
for determination of Rare Earth Oxides by lithium borate
fusion and ICP-MS (ALS Method ME-MS81) and other 48
other elements by four acid digest and ICP-MS (ALS
Method ME-MS61).
No drilling undertaken
No drilling undertaken
No drilling undertaken
Rock Chips
Entire rock chips were submitted to the lab for sample prep
and analysis.
Rock Chips
All samples were submitted to ALS Laboratories in Perth
where 1-3kg rock chips samples were crushed so that >70%
of material passes through -6mm, the sample is then
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Criteria
JORC Code explanation
instruments, etc., the parameters used in determining the
analysis including instrument make and model, reading
times, calibrations factors applied and their derivation,
etc.
Nature of quality control procedures adopted (e.g.
standards, blanks, duplicates, external laboratory checks)
and whether acceptable levels of accuracy (i.e. lack of
bias) and precision have been established.
•
Commentary
pulverised to >85% passing 75 micron.
A prepared sample (0.100 g) is added to lithium
metaborate/lithium tetraborate flux, mixed well and fused in
a furnace at 1025°C. The resulting melt is then cooled and
dissolved in an acid mixture containing nitric, hydrochloric
and hydrofluoric acids. This solution is then analyzed by
inductively coupled plasma - mass spectrometry (ALS
Method ME-MS81).
Lithium borate fusion is considered a total digest and Method
ME-MS81 is appropriate for REE and uranium determination.
No standards, duplicates or blanks submitted with rock chips.
Verification of
sampling and assaying
•
The verification of significant intersections by either
independent or alternative company personnel.
The use of twinned holes.
Documentation of primary data, data entry procedures,
data verification, data storage (physical and electronic)
protocols.
Discuss any adjustment to assay data.
•
•
•
Rock Chips
Rock chip and geological information is written in field books
and coordinates and track data saved from handheld GPSs
used in the field.
Dreadnought geologists have inspected and
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