AIS: Canbelego Resource Increases 77% in Contained Copper
Released
Released
Announcement PDF
ASX Announcement
14 June 2023
Canbelego Resource Increases 77% in Contained Copper
HIGHLIGHTS
•
•
Updated Mineral Resource estimate completed for the Canbelego Main Lode deposit:
o
1.83 million tonnes (Mt) at 1.74% copper (Cu)
o
Containing 31,800 tonnes (31.8Kt) of copper metal
Compared to the 2010 Mineral Resource estimate:
o
22% increase in tonnage (+0.33Mt) and 45% increase in Cu grade (0.54% Cu)
o
77% increase in contained copper metal (+13.8kt)
•
The Mineral Resources comprises 18% Indicated and 82% Inferred categories grouped for potential
opencut extraction to a depth of 70m beneath surface and underground mining beyond that depth
•
Further resource potential around the Main Lode will be tested at the nearby, parallel trending
Western Lode targets, south along strike including the Caballero prospect and potential depth
extensions guided by ongoing modelling work
Helix Resources Limited (ASX: HLX) (“Helix” or “the Company”) is pleased to provide an update on its Mineral
Resources located in the Cobar region of central NSW, Australia. The focus is on the Company’s lead Canbelego
Project which is a 70:30 contributing joint venture with Aeris Resources Ltd (ASX:AIS). Reviews of the geological
models underpinning the CZ (copper) and Restdown (gold) Mineral Resources have also been undertaken.
Commenting on the new Canbelego Mineral Resource estimate, Helix Managing Director Mike Rosenstreich
said:
“We are very much focused on copper and finding new copper deposits. This new Mineral Resource estimate for
the Main Lode at Canbelego creates a solid platform from which to start building up our copper inventory. It is
critical that we now leverage our improved geological understanding of this deposit to find new deposits - and we
are certainly generating some interesting new targets.
Looking outward from this resource we see additional potential with the Western Lodes, only 200m to the west of
the Main Lode, as well as the prospects that we have to the south such Caballero where we still have unfinished
business. Regional-scale exploration also continues to yield new, large anomalies which further add to the
potential of Helix’s ground in this prolific copper region.
A solid, realistic Mineral Resource estimate provides a platform from which to assess any development
opportunities possibly with a partner – which enables us to maintain our focus on discovery activities.”
BOARD & MANAGEMENT
Non-Executive Chairman
Peter Lester
Non-Executive Director
Kylie Prendergast
Managing Director
Mike Rosenstreich
CAPITAL STRUCTURE
Shares on Issue
2,323M
Market Cap
13.94M
Share Price
$0.006
CONTACT US
helix@helixresources.com.au
Level 13, 191 St Georges Terrace
Perth WA 6000
helixresources.com.au
ASX: HLX
Canbelego Project
A mineral Resource estimate for the Canbelego Main Lode was completed by MEC Mining. This was the first
update of the Canbelego resource since the 2010 resource estimate.
The 2023 updated Mineral Resource Estimate for the Canbelego Main Lode is presented in Table 1 below.
Table 1: 2023 Canbelego Main Lode Mineral Resource Estimate (MRE)
MRE Category
Tonnes
Grade (Cu%)
Cu-Metal (t)
Total opencut MRE, ≥240mRL; 0.3 Cu% cut-off grade & underground MRE, <240mRL; 0.8 Cu% cut-off grade
Indicated
340,600
1.65
5,620
Inferred
1,493,700
1.75
26,140
Total: Opencut & Underground
1,830,000
1.74
31,842
Comprising:
MRE Category
Tonnes
Grade (Cu%)
Cu-Metal (t)
Potential opencut MRE, ≥240mRL; 0.3 Cu% cut-off grade
Indicated
99,700
1.28
1,276
Inferred
282,300
1.21
3,416
Total: potential opencut MRE
377,000
1.23
4,637
Potential underground MRE, <240mRL; 0.8 Cu% cut-off grade
Indicated
240,900
1.81
4,360
Inferred
1,211,400
1.88
22,774
Total: potential underground MRE
1,453,000
1.87
27,171
* Numbers may not sum due to rounding
* Numbers are rounded to reflect that they are estimates
* A top-cut grade of Cu 12% was applied to the MRE
* Stated MRE complies with Reasonable prospects of eventual economic extraction
Table 2: 2010 Canbelego Main Lode MRE (0.8% Cu cut-off)
MRE Category
Indicated
Inferred
Total:
* Reported in accordance with the 2004 JORC Code
Tonnes
1,500,000
1,500,000
Grade (Cu%)
1.20
1.20
Cu-Metal (t)
18,000
18,000
Table 3: Summary Comparison between 2010 and 2023 Canbelego Main Lode MRE’s
Tonnes
Up 22%
Total MRE:
Grade (Cu%)
Up 45%
Cu-Metal (t)
Up 77%
Helix restarted work at Canbelego in early 2021, the first exploration work undertaken at the project since 2013.
The Company completed a total 68 drill holes at the Main Lode and surrounding prospects for a total of 16,666m.
The Main Lode drilling was targeted at depth extensions of the copper shoots and to better define copper grades
and mineralised widths at shallow levels broadly above the base of the 2010 MRE, as shown in Figure 1.
The 2023 MRE has been reported in accordance with the Australasian Code for Reporting of Exploration Results,
Mineral Resources and Ore Reserves 2012 (JORC Code). The 2010 MRE was reported in accordance with the JORC
2004 code.
2
The 2023 MRE has increased contained copper by 77% or 13.8Kt. A detailed comparison is provided in Table 3 –
Summary Comparison. The 2010 MRE was classified as Inferred. The increased drill density and improved
geological data has resulted in 18% of the total new MRE now classified as Indicated, while the balance is
Inferred.
Details on the 2023 MRE are provided in the Technical Report below and the JORC Tables attached.
Figure 1: Schematic Long Section Canbelego Main Lode
3
Figure 2: Canbelego Project Location Plan
CZ Copper Project
A Mineral Resource Estimate for the CZ (also known as Collerina) deposit was released by Helix on 11 June 2019 1.
Since that estimate, the Company undertook a drill program which was completed in late 2021. The ensuing
interpretation and targeting work highlighted a significant proportion of the pre-2021 drillholes that had not been
geologically logged nor sufficiently sampled and assayed. This led to a detailed new interpretation process
focused on assessing the validity of the geological model which underpinned the 2019 Mineral Resource estimate.
1 Refer ASX Report 11 June 2019
4
Based on this recently completed major geological review the Company has elected to no longer quote a Mineral
Resource for the CZ Project pending further work.
The CZ Project is an advanced copper project with significant high-grade copper intercepts both at depth and in
newly delineated shallow oxide zones. The Company intends to leverage from its improved understanding of the
CZ geology to undertake further target generation and drill testing work in the greater CZ area.
Restdown Gold Project
A Mineral Resource Estimate for the Restdown Gold Project located on the Western Group tenements
approximately 17km southwest of Canbelego was released by Helix on 7 November 2019. The shallow
predominantly oxide style gold mineralisation was defined across four proximal project areas.
A recent review of the geological model underpinning the Restdown Mineral Resource estimates indicates
material uncertainty of various technical assumptions. Based on this work the Company has elected to no longer
quote a Mineral Resource for the Restdown Gold Project.
A major regional work program is being undertaken in the broader Restdown area (refer ASX Report 4 May 2023)
principally targeting copper mineralisation. This includes regional scale multi-element geochemical auger
sampling useful for detecting anomalies prospective for copper, gold or other types of mineralisation.
The Restdown Gold Project data will be incorporated into this work program. The new geochemical and
geophysical work in progress is providing insights on the prospectivity of this area which is generally under deeply
weathered or transported cover.
TECHNICAL REPORT – CANBELEGO MINERAL RESOURCE ESTIMATE
Introduction
The Canbelego Copper Project lies along the regional scale Rochford Copper Trend. The Project falls within the
70:30 ‘contributing’ joint venture (JV) with Aeris Resources Ltd (ASX: AIS) (Helix 70% and Manager, Aeris 30%)
covering Exploration Licence 6105.
Canbelego Geology
The primary stratigraphy at Canbelego comprises a steeply west dipping and west ‘younging’ sequence of
interbedded quartz sandstone, siliceous siltstone and mudstone which has been metamorphosed to psammite
and pelite. Dolerite sills and dykes, which have been metamorphosed to mafic schist, intrude the psammite and
pelite in the upper part of the stratigraphy, and gabbro intrusions are a feature of the lower part of the
stratigraphy.
The copper mineralisation is hosted by a deformed sequence of intercalated psammite, pelite and mafic schist,
which also dips steeply to the west. The main sulphide phase is associated with pervasive chlorite-carbonaterich alteration that is often texturally destructive. Mineralisation is mostly in the form of a chalcopyritepyrite ±pyrrhotite ±sphalerite bearing breccia and vein network accompanied by a carbonate-quartz-rich
gangue. The distribution of the mineralisation is controlled by late faults and shears and is hosted by highly
chloritised and brecciated zones within pelite, psammite and mafic schist units.
The Main Lode has a strike extent of 350m, a true thickness averaging approximately 5m, and a true depth of
approximately 600m. The Main Lode pinches and swells and although continuous can be highly variable in width.
Smaller lodes occur parallel and adjacent to the Main Lode.
5
Drilling and Sampling
The current MRE is based on 16,224 metres of drilling comprising 56 drill holes and 15,143 drill samples from the
Canbelego Main Lode. This includes a total of 25 diamond holes (10,116m) and 14 RC holes (2004m) drilled since
2021.
Sampling Techniques and Analytical methods
Diamond drill core was mostly sampled in 1m intervals within a range of 0.5m to 1.5m, taking half core samples
within mineralised zones, plus longer composite samples up to 3m outside mineralisation for host rock
characterisation. The drill core was cut with a Corewise automatic core cutter. RC drill holes were sampled at 1m
intervals via a cyclone cone splitter into a numbered calico bag for the laboratory sample, and a large plastic bag
for the remaining sample.
ALS Laboratory Services completed the multi-element analysis work carried out on the post-2021 drill samples.
Samples were analysed for gold (selected samples only) by fire assay and for other elements by four acid digest
ICP-MS and ICP-AES. Further details on sampling techniques are provided in Appendix 2.
Estimation Methodology
The mineralisation was digitised on section and wireframed. A block model was developed and restricted to the
wireframes. The parent block size was 5m east, by 10m north, and 2.5m in elevation. Parent cells were sub
blocked to 1m east, by 2m north, and 1.25m in elevation. Grade estimation was Ordinary block kriging with
discretization of 2 x 2 x 2 within the parent cells. The points were estimated and then averaged to produce the
block estimate. Parent cells were estimated, and the grade defaulted to the sub cells within the parent cell.
Further details on estimation methodology are provided in Appendix 2.
Mineral Resource Classification
Mineral Resources were classified as both Indicated and Inferred category Mineral Resources. The drillhole
spacing along strike is approximately 35m, and down dip it is highly variable ranging from approximately 30m to
approximately 100m. The parent block dimensions were selected to provide resolution within the narrow lodes,
and 10m along strike to match the 35m spacing, without having blocks too small which may bias the Mineral
Resource estimate. The classification was based upon spacing using a search ellipse to establish Indicated Mineral
Resources using a minimum of three drillholes with ellipse dimensions of 45m down dip, 32m along strike and
14m across strike to create discrete classified areas. Remaining blocks were assigned to an Inferred Mineral
Resource category because the distance in three dimensions was acceptable to denote as Inferred classified
Mineral Resources as opposed to unclassified Mineral Resources. Further details on the mineral resource
classification are provided in Appendix 2.
Refer Figures 3 & 4 for representative long section and cross section views through the deposit model.
6
Figure 3: Long section view of the deposit model looking east
Reporting Criteria – Cut-off grades
The geological cut-off used to differentiate mineralised material from weakly mineralised material was 0.1% Cu. A
minimum of two intervals were used for the interpretation of the mineralised envelope, with maximum total
internal waste of two metres included, providing the minimum composite grade was above 0.1% Cu.
The economic cut-off grade of 0.3% Cu was applied to potential opencut Mineral Resources above the 240mRL
level. The 240mRL level is approximately 70m from surface. A cut-off grade of 0.8% Cu was applied below the
240mRL level due to the higher costs of exploiting Mineral Resources at depth.
Metallurgy
No metallurgical assumptions were made for the MRE. Metallurgical testwork and scoping studies will be
completed in the future.
7
Figure 4: Cross section through the deposit model
COMPETENT PERSON STATEMENT
The information in this report that relates to exploration results, and geological data for the Cobar projects is based on
information generated and compiled by Mr Gordon Barnes and Mr Mike Rosenstreich who are both employees and
shareholders of the Company.
Mr Barnes is a Member of the Australian Institute of Geoscientists and Mr Rosenstreich is a Fellow of the Australasian
Institute of Mining and Metallurgy.
The Mineral Resource estimate was completed by Mr Dean O’Keefe the Principal Resource Geologist of MEC Mining.
MEC Mining is a global technical consulting firm specialising in mining services capabilities across the mining life cycle
from early-stage exploration through development, mine planning, onsite management, to mine closure and
rehabilitation. Mr O’Keefe is a Fellow of the Australasian Institute of Mining and Metallurgy.
Mr Gordon Barnes, Mr Mike Rosenstreich, and Mr O’Keefe have sufficient experience that is relevant to the styles of
mineralisation and types of deposits under consideration and to the activities being undertaken to qualify as
8
Competent Person(s) as defined in the 2012 Edition of the “Australasian Code for Reporting of Exploration Results,
Mineral Resources and Ore Reserves”.
Mr Barnes, Mr Rosenstreich, and Mr O’Keefe have consented to the inclusion of this information in the form and
context in which it appears in this report.
This ASX release was authorised by the Board of Directors of Helix Resources Ltd.
HLX
ABN: 27 009 138 738
ASX: HLX
Board of Directors:
Peter Lester
Non-Executive Chairman
Kylie Prendergast Non-Executive Director
Mike Rosenstreich Managing Director
Contact Details:
Helix Resources Limited
Level 13, 191 St Georges Terrace,
Perth, WA, 6000
Company Secretary
Ben Donovan
Investor Contact:
Mike Rosenstreich
Email: helix@helixresources.com.au
PO Box 7237
Cloisters Square PO, WA, 6850
Email: helix@helixresources.com.au
Web: www.helixresources.com.au
Tel: +61 (0)8 9321 2644
Media Contact:
David Tasker
Chapter One Advisers
Email: dtasker@chapteroneadvisors.com.au
Tel: 0433 112 936
About Helix Resources
Helix Resources is an ASX-listed resources company which is ‘all-in on copper’ exploration in the prolific copper
producing region of Cobar, NSW.
The Company possesses a sizable ground position across three tenement groups which are largely untested
despite being located within ~50km of significant copper producing operations. The western tenements cover
30km of contiguous strike of the Rochford Copper Trend. At Rochford, the Company is advancing a pipeline of
wholly owned copper opportunities, as well as the Canbelego JV Project (70% owned and operated by Helix and
30% owned by Aeris Resources Ltd ASX: AIS) where a Mineral Resource of 31.8Kt of contained copper at 1.74% Cu
has recently been estimated. The eastern tenement group encompasses more than 150km of prospective strike,
principally the Collerina Trend which includes the 100% owned, advanced CZ copper Project and numerous recent
targets currently being tested. A northern tenement application takes in the northern extension of the Collerina
Trend, north of Aeris’s Tritton Copper Operations.
Helix has additional exposure to ‘energy metals’ through its Homeville Nickel-Cobalt resource and numerous,
high-grade laterite, nickel-cobalt prospects. It is presently seeking to consolidate various regional nickel-cobalt
opportunities in the region into 100% owned Ionick Metals Ltd for a potential IPO.
9
APPENDIX 2: JORC Code Table 1
Section 1 Sampling Techniques and Data
Criteria
JORC Code explanation
Sampling
techniques
•
•
•
•
Drilling
techniques
•
Commentary
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 sounds, 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.
Diamond Core Drilling (DD)
• Commercial drilling contractor Mitchell Services conducted the DD drilling. The holes
were orientated approximately ENE and drilled with starting dips of 600 to 78°.
• Drill hole locations were determined using a hand-held GPS. Down-hole surveys were
conducted using the Reflex multi-shot gyro system.
• Diamond core was sampled in 1m intervals, taking half core at various intervals
(=/<1m).
• The samples were collected and supervised by Helix staff.
• The samples were in the direct control of Helix staff and transported to the laboratory
by Helix.
Reverse Circulation (RC) Drilling
• Commercial drilling contractor Mitchell Services conducted the RC drilling. The holes
were orientated approximately E (225°) and were drilled with starting dips of 60° or
70o.
• Drill hole locations were determined using a hand-held GPS. Down-hole surveys were
conducted using the Reflex multi-shot gyro system.
• Holes were sampled at 1m intervals via a cyclone cone splitter into a numbered calico
bag with weights typically from 1.5kg to 3kg for the lab sample, and a large plastic bag
for the remaining sample.
• The lab samples were collected and always supervised by Helix staff.
• The samples were always under the direct control of Helix staff and were transported
to the laboratory by a commercial transport contractor.
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.).
•
•
DD: PQ, HQ and NQ drill core was collected using triple tube and all other industry
practice methods. Navi drilling, wedges and chrome barrels were used for directional
drilling.
RC: 5 ½ inch diameter drill bit.
10
Criteria
JORC Code explanation
Drill sample
recovery
•
•
•
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.
Commentary
•
•
•
•
•
•
Logging
•
•
•
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.
•
•
•
•
•
Core recoveries are recorded by the driller on core blocks and checked by a geologist
or field technician.
Diamond core was reconstructed into continuous runs on an angle iron cradle for
orientation marking and depths were verified against the depths recorded on core
blocks. Rod counts were routinely undertaken by drillers as a further cross-reference
for depth and core recovery.
Samples were checked by the geologist for consistency and compared to the sample
interval data for accuracy.
RC bulk bag samples were not weighed, however recoveries were monitored and
recorded by the supervising geologist.
When poor sample recovery was encountered during drilling, the geologist and driller
attempt to rectify the problem to ensure maximum sample recovery.
Sample recoveries at Canbelego were typically good for both RC and DD, apart from
when voids were intersected, which was rare. The void intervals were recorded on
geological logs.
The drill core is stored in core trays on pallets and the RC chips are stored in standard
RC chip trays in numbered boxes on pallets.
The drill core and RC chips are stored at Helix’s secure facility in Orange.
The drill core and RC chips were comprehensively logged and sampled by experienced
Helix geologists or consultants, including lithology, alteration, degree of oxidation,
structure, colour and occurrence and type of sulphide mineralisation.
The visual estimate of the proportion of copper sulphide is from systematic logging of
diamond drill core and RC drill chips. The amount of copper sulphide and the relative
proportions of the copper sulphide species from metre to metre vary and a detailed
estimate of this variability is not possible within the limits of acceptable accuracy.
Metal grades of the core are determined by laboratory assay. The copper sulphide
typically occurs as disseminations, blebs, stringers, laminations, vein fill and semimassive sulphide. Fine copper sulphide may be underestimated if present.
Identification of the sulphide species and visual estimates of the proportions of those
sulphide species present have been made by an experienced geologist with more than
10 years’ experience in copper mineralisation in this region.
Diamond core and RC chips were logged to an appropriate level of detail to increase
the level of geological knowledge and increase the geological understanding of the
deposit.
11
Criteria
JORC Code explanation
Subsampling
techniques
and sample
preparation
•
•
•
•
•
•
Quality of
assay data
and
laboratory
tests
•
•
•
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 subsampling 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
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
•
•
•
•
•
•
•
•
•
•
•
•
Drill core was cut with a Corewise automatic core cutter, and a half core sample was
collected for laboratory analysis.
The RC drilling rig was equipped with an in-built cyclone and cone splitting system,
which provided one bulk sample of approximately 20kg to 30kg and a sub-sample of
1.5-3kg per metre drilled.
All RC samples were split using the system described above to maximise and maintain
consistent representivity. The majority of the samples were dry.
Bulk samples were placed in green plastic bags, with the sub-samples placed into calico
sample bags.
Field duplicates were collected by spear from green plastic bags. These duplicates were
designed for laboratory checks.
Certified Reference Material (CRM) standards and blanks are inserted into the sample
stream at approximately 1:35.
Laboratory duplicate samples are split with a riffle splitter.
A 1.5kg to 3kg RC sample was collected from 1m intervals and is considered appropriate
and representative for the grain size and style of mineralisation.
ALS Laboratory Services completed the Au and multi-element analysis work carried out
on 1m split RC samples and half core DD samples. The laboratory techniques below are
for all samples submitted to ALS and are considered appropriate for the style of
mineralisation at Canbelego:
• Crush and pulverize sample.
• Au-AA25 Ore Grade Au 30g FA AA Finish (only on selected samples)
• ME-ICP61 48 element 4 acid digest ICP-AES.
• OG62 Ore Grade finish for non-Au over range samples.
The QA/QC data includes standards, duplicates, and laboratory checks.
Duplicates for percussion drilling are collected from the one metre sample bag using a
spear.
QA/QC tests are conducted by the laboratory on each batch of samples with CRM
standards.
12
Criteria
Verification
of sampling
and assaying
JORC Code explanation
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.
•
•
•
•
Location of
data points
•
•
•
Data spacing
and
distribution
Orientation
of data in
relation to
geological
structure
Sample
security
•
•
•
•
•
•
Commentary
•
•
•
•
•
•
•
Accuracy and quality of surveys used to locate drill
holes (collar and down-hole surveys), trenches,
mine workings and other locations used in Mineral
Resourceestimation.
Specification of the grid system used.
Quality and adequacy of topographic control.
•
•
•
•
Data spacing for reporting of Exploration Results.
Whether the data spacing and distribution is
sufficient to establish the degree of geological and
grade continuity appropriate for the Mineral
Resource and Ore Reserve estimation procedure(s)
and classifications applied.
Whether sample compositing has been applied.
Whether the orientation of sampling achieves
unbiased sampling of possible structures and
the extent to which this is known, considering
the deposit type.
If the relationship between the drilling orientation
and the orientation of key mineralised structures is
considered to have introduced a sampling bias, this
should be assessed and reported if material.
•
The measures taken to ensure sample security.
•
•
•
•
•
•
•
•
Assays results are validated by standard database procedures and are verified by Helix
management.
Assay data are not adjusted.
Geological data is logged into laptop using OCRIS mobile software. This software
includes validation procedures to ensure data integrity.
Logged data includes detailed geology (weathering, structure, alteration,
mineralisation), sample quality, sample interval and sample number.
QA/QC inserts (standards, duplicates, blanks) are added to the sample stream.
Magnetic susceptibility data is collected using a datalogger.
All logged data, the assay data received from the laboratory, and survey data is
loaded into a secure database and verified.
The drill collar positions were determined using a GPS (±5m).
Grid system is MGA94 Zone 55.
Surface RL data collected using GPS and verified by public Digital Elevation Models.
Relief with the drilling zone ranges from 0m to 15m.
Drilling has been conducted by Helix, Aeris (Straits) and historic drilling by companies in
the 1970’s.
The drilling had been conducted in a manner consistent with the procedures set out in
this JORC table.
Assays used in the current resource were generated by Straits or Helix and include some
re-sampling of the historic core.
Surface sampling, the position of the drill holes and the sampling techniques
and intervals are considered appropriate for the early-phase exploration of a
system such as that identified at Canbelego.
The distribution of copper is known to be variably enriched and depleted within the
structurally controlled, sub vertical copper deposit at Canbelego.
Drilling is designed to intersect mineralisation as close to perpendicular as possible.
Drill hole deviation will influence true width estimates of mineralisation. True width of
mineralisation will be further assessed with detailed logging of orientated structural
data and when the resource model is updated.
Drill hole intersections of mineralisation are not considered to be biased.
Chain of Custody is managed by Helix staff and its contractors. The samples were
freighted directly to the laboratory, or transported directly by Helix staff, with
13
Criteria
JORC Code explanation
Audits or
reviews
•
Commentary
The results of any audits or reviews of sampling
techniques and data.
•
•
appropriate documentation listing sam
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