Wrap Text
Maiden Drilling Program Delivers Shallow, High-Grade Intersections at Okiep Copper Project, Northern Cape, SA
Orion Minerals Limited
Incorporated in the Commonwealth of Australia
Australian Company Number 098 939 274
ASX share code: ORN
JSE share code: ORN
ISIN: AU000000ORN1
Maiden Drilling Program Delivers Shallow, High-Grade Intersections at Okiep Copper Project,
Northern Cape, South Africa
- Assay results received for the first four drill holes from the maiden drilling program at the Okiep
Copper Project, confirming and exceeding expectations.
- Three holes were drilled to confirm historically reported mineralisation, returning high-grade
results including 10.36m at 1.84% Cu, 5.71m at 1.93% Cu and 4.69m at 2.05% Cu.
- Importantly, drilling also intersected a new mineralised zone at Koperberg West, supporting
Orion’s geological model, with a high-grade intercept of 4.76m at 3.99% Cu.
- The maiden drilling program is now 55% complete, with 14 diamond holes completed at
Koperberg West and 2 diamond holes completed at Koperberg East with a total of 1,900m drilled
to date.
Orion’s Managing Director and CEO, Errol Smart, commented:
“We are thrilled with the first assays received from our ongoing maiden drilling program at Okiep. The
results we’ve received to date have confirmed the historical drill results for high-grade sulphide copper
mineralisation near-surface and more importantly, confirming our geological hypothesis for a model for
intrusive bodies arranged in en-echelon side-stepping lenses.
“Historical drilling focussed on drilling down-dip projections, without adequately testing the probable side-
stepping of mineralised lenses as was encountered at the 38 million tonne Carolusberg Deeps mine, which
sits along strike from and on the same structure as Okiep.
“This potential for offset, high-grade lenses, that continue down dip below the extensive, shallow historical
mining on the 5 km strike Carolusberg line, presents a very exciting exploration opportunity. Drill testing this
down dip position has been elevated to a high priority focus for 2022, alongside the testing of EM targets
identified through our recent SkyTemTM survey.
“Our engineering and permitting teams are also making good progress on the early mining project we
announced on 3 May 2021 and we anticipate being able to provide market updates on this work shortly”
Orion Minerals Limited (ASX/JSE: ORN) (Orion or Company) is pleased to advise that initial drilling assays
from the maiden drilling program at the Okiep Copper Project (OCP) in the Northern Cape, South Africa,
have delivered very positive results, confirming the presence of shallow high-grade copper mineralisation
and demonstrating the potential for additional high-grade mineralised lenses at depth.
OCP Drilling Program
The exploration drilling program at the OCP is designed to test and expand mineralisation intersected in
historical drilling. Drilling is currently focussed on the Carolusberg – Koperberg line of intrusives (Figures 1
and 2). The Carolusberg Complex was the biggest contributor to historical mining in the Okiep Copper
District delivering 38Mt grading 1.54% Cu out of the reported total of 105Mt mined over the past 100 years.
Historical mine records show that Carolusberg Deeps contributed 16Mt at a head grade of 2.05% Cu (refer
ASX/JSE release 3 August 2021).
Orion is currently exploring prospects with known copper mineralisation along strike of Carolusberg,
applying an exploration model derived from structural interpretation of Carolusberg Mine mineralisation.
The current drilling program also includes twin and infill drilling to verify historical drilling results and to allow
future resource estimation.
To date, 1,900m of the 3,500m planned diamond drilling program has been completed, representing 16
of the 26 planned holes. Assay results from 39 samples have been received. Further drill holes are currently
being logged and sampled by Orion’s geological team, prior to dispatch to ALS Laboratory in
Johannesburg.
Figure 1: Carolusberg-Koperberg locality map showing drill hole collars, prospects/mines and mafic intrusives.
Figure 2: Koperberg West and East drill hole locations. Refer to Table 3 for collar details.
Results received to date
Three holes into historically drilled mineralisation have returned high-grade copper intersections including
10.36m at 1.84% Cu from 58.94m in OKWD100, 5.71m at 1.93% Cu from 72.85m in OKWD102 and 4.69m at
2.05% Cu from 49.22m in OKWD105. Results confirm high-grade, near-surface sulphide copper
mineralisation.
Hole OKWD102, drilled primarily to twin historical hole KW0201, returned comparable high-grade copper
sulphide mineralisation (refer Table 1). Drillhole collar coordinates are provided in (Table 3).
Table 1: Twin hole intersection for comparison (a minimum cut-off of 0.5 %Cu with maximum 3m internal waste allowed, no
capping).
Twin Hole Historical Hole
Hole ID From To Thickness Cu% Hole ID From To Thickness Cu%
(m) (m) (m) (m) (m) (m)
OKWD102 72.85 78.56 5.71 1.93 KW020 71.63 78.03 6.4 1.31
1 Historical Exploration Results from KW020 were reported in accordance with the JORC Code (2012) in Orion’s ASX release of 3
August 2021: “Exploration ramps up at the Okiep Copper Project following exercise of Option to Purchase” available to the public
on https://www.orionminerals.com.au/investors/asx-jse-announcements/. Competent Person: Mr Errol Smart. Orion is not aware of
any new information or data that materially affects the information included here. Orion confirms that the form and context in which
the Competent Person’s findings are presented have not been materially modified.
Importantly, extended hole OKWD102 intersected 4.76m at 3.99% Cu from 95.08m, representing a new
intrusive lens and supporting a model for en-echelon side stepping mineralisation occurring along the
entire strike of the Carolusberg line. High-grade mineralisation at the Carolusberg Mine was mined down
to 1,900m depth, and comprised several en-echelon side steps down dip (Figure 3).
Several other recent holes, with assay results pending, intersected the en-echelon downdip lenses of
sulphide mineralisation, supporting this geological model and presenting high-priority follow-up drill targets
on offset down-dip extensions below historical shallow mining.
Drill core logging identified a further ten mafic (Koperberg Suite) intersections. The logged copper mineral
assemblages are all sulphide mineralisation, comprising chalcopyrite and bornite, with minor pyrrhotite
present. Assay results are pending for several holes. Intersections are tabled in Table 2 and illustrated in
Figures 5 - 9 below.
Table 2: Intersections made in current exploration drill holes (a minimum cut-off of 0.5 Cu% with maximum 3m internal waste
allowed. Higher grade inclusions at 1.0 Cu%, no capping).
Ultramafics/Mafics Mineralisation
Project Hole ID From From To
To (m) Interval (m)
(m) (m) (m) Interval (m) Cu%
45.98 47.73 1.75 Sampling/Results Pending
OKWD099
105.04 107.27 2.23 Sampling/Results Pending
58.98 69.34 10.36 1.84
OKWD100 58.94 69.34 10.40
64.98 69.34 4.36 2.41
72.85 78.56 5.71 1.93
69.85 78.56 8.71
OKWD102 75.06 78.56 3.50 2.09
95.08 100.50 5.42 95.08 99.84 4.76 3.99
OKWD103 65.70 67.76 2.06 66.56 67.77 1.21 0.62
Koperberg West 33.85 34.90 1.05 1.71
33.85 39.70 5.85
OKWD105 38.85 39.70 0.85 0.96
49.22 53.91 4.69 49.22 53.91 4.69 2.05
OKWD108 59.57 65.35 5.78 Sampling/Results Pending
OKWD109 21.38 27.14 5.76 Sampling/Results Pending
112.80 113.02 0.22 Sampling/Results Pending
OKWD110
150.28 150.44 0.16 Sampling/Results Pending
18.69 21.89 3.20 Sampling/Results Pending
OKWD111
24.70 26.93 2.23 Sampling/Results Pending
25.50 25.59 0.09 Sampling/Results Pending
28.53 34.67 6.14 Sampling/Results Pending
36.36 43.61 7.25 Sampling/Results Pending
45.32 48.35 3.03 Sampling/Results Pending
49.05 52.66 3.61 Sampling/Results Pending
Koperberg East OKED064
53.29 55.65 2.36 Sampling/Results Pending
63.02 63.57 0.55 Sampling/Results Pending
75.98 89.34 13.36 Sampling/Results Pending
96.19 97.60 1.41 Sampling/Results Pending
100.19 102.37 2.18 Sampling/Results Pending
The data aggregation methods are deemed acceptable for this type of mineralisation.
Table 3: Current and Historical Twin Drill Hole Collar Data (LO17WGS84).
Prospect Hole ID Easting Northing RL Depth Azimuth Dip
Koperberg West KW020 90795.06 -3281539.74 1011.71 109.07 160 -60
Koperberg West OKWD098 90798.00 --3281547.50 1011.81 181.56 160 -65
Koperberg West OKWD099 90819.00 --3281548.00 1013.50 127.47 160 -60
Koperberg West OKWD100 90819.00 --3281548.00 1013.50 100.16 160 -50
Koperberg West OKWD101 90850.00 --3281551.90 1018.36 106.67 160 -75
Koperberg West OKWD102 90798.02 --3281547.70 1011.81 120.00 160 -50
Koperberg West OKWD103 90849.23 --3281551.60 1018.19 100.50 160 -65
Koperberg West OKWD104 90854.00 --3281521.90 1013.19 121.35 160 -65
Koperberg West OKWD105 90776.00 --3281578.20 1017.06 110.21 160 -60
Koperberg West OKWD106 90854.00 --3281521.90 1013.19 64.08 160 -45
Koperberg West OKWD107 90776.00 --3281578.20 1017.06 127.36 160 -75
Koperberg West OKWD108 90886.00 --3281516.50 1015.92 121.60 160 -65
Koperberg West OKWD109 90776.00 --3281578.00 1017.00 87.56 160 -45
Koperberg West OKWD110 90853.00 --3281631.80 1019.61 210.90 340 -75
Koperberg West OKWD111 90759.00 --3281583.00 1017.80 79.07 160 -50
Koperberg East OKED063 92306.00 --3281784.00 1107.11 130.22 160 -65
Koperberg East OKED064 92364.00 --3281767.00 1092.87 102.5 160 -60
Figure 3: Sections (not to scale) at Carolusberg (after Kister et. al, 1996) and Koperberg West illustrating the concept of en-echelon
mafic intrusions and mineralisation. Note: For the sake of illustrating the concept, hole IDs are not included.
Figure 4: Plan view of the modelled mafic and mineralised body of Koperberg West, showing holes drilled and section lines.
Figure 5: Section (Koperberg West) showing OKWD100 intercepts, looking east.
Figure 6: Section (Koperberg West) showing OKWD102 intercepts, looking east.
Note: Holes are projected along strike onto the section.
Figure 7: Section (Koperberg West) showing OKWD102 intercepts, looking east.
Figure 8: Plan view of mafic and mineralised body of Koperberg East - showing completed holes.
Figure 9: Mafic intercepts plotted in section showing hole OKED064 drilled at Koperberg East. A potential additional footwall lens
appears to have been intersected (sampling and results still pending). Looking east.
For and on behalf of the Board.
Errol Smart
Managing Director and CEO
11 January 2022
ENQUIRIES
Investors Media JSE Sponsor
Errol Smart – Managing Director & CEO Nicholas Read Monique Martinez
Denis Waddell – Chairman Read Corporate, Australia Merchantec Capital
T: +61 (0) 3 8080 7170 T: +61 (0) 419 929 046 T: +27 (0) 11 325 6363
E: info@orionminerals.com.au E: nicholas@readcorporate.com.au E: monique@merchantec.co.za
Competent Persons Statement
The information in this report that relates to Orion’s Exploration Results at the Okiep Copper Project is reported in
accordance with the 2012 Edition of the Australasian Code for Reporting of Exploration Results, Mineral Resources
and Ore Reserves (JORC Code) and has been compiled and assessed under the supervision of Dr Deon Vermaakt,
Orion Minerals Exploration Manager, a Competent Person who is a Professional Natural Scientist (Pr.Sci.Nat.) registered
with the South African Council for Natural Scientific Professionals, a Recognised Professional Organisation (RPO). Dr
Vermaakt, as Orion Minerals Exploration Manager, is a full-time employee of the company. Dr Vermaakt confirms
there is no potential for a conflict of interest in acting as the Competent Person. Dr Vermaakt has sufficient experience
that 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 JORC Code. Dr Deon Vermaakt
(Pr.Sci.Nat) consents to the inclusion in this announcement of the matters based on his information in the form and
context in which it appears.
Disclaimer
This release may include forward-looking statements. Such forward-looking statements may include, among other
things, statements regarding targets, estimates and assumptions in respect of metal production and prices, operating
costs and results, capital expenditures, mineral reserves and mineral resources and anticipated grades and recovery
rates, and are or may be based on assumptions and estimates related to future technical, economic, market,
political, social and other conditions. These forward-looking statements are based on management’s expectations
and beliefs concerning future events. Forward-looking statements inherently involve subjective judgement and
analysis and are necessarily subject to risks, uncertainties and other factors, many of which are outside the control of
Orion. Actual results and developments may vary materially from those expressed in this release. Given these
uncertainties, readers are cautioned not to place undue reliance on such forward-looking statements. Orion makes
no undertaking to subsequently update or revise the forward-looking statements made in this release to reflect events
or circumstances after the date of this release. All information in respect of Exploration Results and other technical
information should be read in conjunction with Competent Person Statements in this release (where applicable). To
the maximum extent permitted by law, Orion and any of its related bodies corporate and affiliates and their officers,
employees, agents, associates and advisers:
• disclaim any obligations or undertaking to release any updates or revisions to the information to reflect any
change in expectations or assumptions;
• do not make any representation or warranty, express or implied, as to the accuracy, reliability or
completeness of the information in this release, or likelihood of fulfilment of any forward-looking statement or
any event or results expressed or implied in any forward-looking statement; and
• disclaim all responsibility and liability for these forward-looking statements (including, without limitation, liability
for negligence).
Appendix 1: The following tables are provided in accordance with the JORC Code (2012) requirements for the reporting of Exploration Results from the
Okiep Copper Project.
Section 1 Sampling Techniques and Data
(Criteria in this section apply to all succeeding sections.)
Criteria JORC Code explanation Commentary
Sampling techniques • Nature and quality of sampling (e.g. cut channels, random chips, or • Sampling was carried out under supervision using industry standard
specific specialised industry standard measurement tools appropriate procedures. NQ size diamond drill cores were longitudinally split in
to the minerals under investigation, such as down hole gamma half using a diamond core cutting machine.
sondes, or handheld XRF instruments, etc). These examples should not • HQ core size was only drilled in the upper weathered portion and
be taken as limiting the broad meaning of sampling. HQ core was sampled.
• Include reference to measures taken to ensure sample representivity • 1 metre sample lengths were taken in most cases. Sample lengths
and the appropriate calibration of any measurement tools or systems were varied to honour geological / mineralisation boundaries.
used.
• Areas of sampling were selected based on visual observations and
• Aspects of the determination of mineralisation that are Material to the readings from handheld Niton XL3t 500 XRF instrument.
Public Report.
• Standard analytical range >25 elements from S to U with additional
• In cases where ‘industry standard’ work has been done this would be elements Mg, Al, Si and P via helium purge.
relatively simple (eg ‘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 (eg submarine
nodules) may warrant disclosure of detailed information.
Drilling techniques • Drill type (eg core, reverse circulation, open-hole hammer, rotary air • Diamond core drilling was undertaken.
blast, auger, Bangka, sonic, etc) and details (eg core diameter, triple • HQ and NQ size core was drilled using a standard tube. HQ core size
or standard tube, depth of diamond tails, face-sampling bit or other was only drilled in the upper weathered portion and no HQ core
type, whether core is oriented and if so, by what method, etc). was sampled.
• HQ core generally only in upper 6m weathered zone, no Cu
mineralisation intersected.
• Core was not oriented.
Drill sample recovery • Method of recording and assessing core and chip sample recoveries • Core ‘stick-ups’ reflecting the depth of the drill hole are recorded at
and results assessed. the rig at the end of each core run. A block with the depth of the
• Measures taken to maximise sample recovery and ensure hole written on it is placed in the core box at the end of each run.
representative nature of the samples. At the core yard, the length of core in the core box is measured for
each run. The measured length of core is subtracted from the length
• Whether a relationship exists between sample recovery and grade
of the run as recorded from the stick-up measured at the rig to
and whether sample bias may have occurred due to preferential
determine the core loss.
loss/gain of fine/coarse material.
• Core recovery was found to be excellent (>98%) within the
mineralised zone.
• Ground conditions belowe the weathered zone was excellent,
furthermore slower drilling ensured excellent core recovery.
Criteria JORC Code explanation Commentary
• No obvious relationship exists between sample recovery and grade.
• No core/sample loss or gain which could result in sample bais.
Logging • Whether core and chip samples have been geologically and • Core of the entire hole length was geologically logged by qualified
geotechnically logged to a level of detail to support appropriate geologists.
Mineral Resource estimation, mining studies and metallurgical studies. • Geological logging was quantitative and was carried out using a
• Whether logging is qualitative or quantitative in nature. Core (or standard sheet with a set of standard codes to describe lithology,
costean, channel, etc) photography. structure and mineralisation. The logging sheet allows for free-form
• The total length and percentage of the relevant intersections logged. description to note any unusual features.
• Geological logs were captured electronically.
• All cores were photographed before and after sampling.
• 16 Diamond holes, totalling ~1,900m core was logged. Of this,
approximately 58m are ultramafic/mafic lithologies primarily hosting
the Cu mineralisation.
Sub-sampling • If core, whether cut or sawn and whether quarter, half or all core • NQ core was cut, and half core was taken as sample
techniques and taken. • HQ core size was only drilled in the upper weathered portion and
sample preparation • If non-core, whether riffled, tube sampled, rotary split, etc and no HQ core was sampled.
whether sampled wet or dry. • Sample preparation was undertaken at ALS Laboratory
• For all sample types, the nature, quality and appropriateness of the Johannesburg (ALS), an ISO accredited laboratory, and is
sample preparation technique. considered appropriate. ALS utilises industry best practice for
• Quality control procedures adopted for all sub-sampling stages to sample preparation for analysis involving drying of samples,
maximise representivity of samples. weighing samples, crushing to <2mm if required, crushing samples
are riffle split and then pulverising to 250 gwith +85% passeing
• Measures taken to ensure that the sampling is representative of the in
through 75 microns.
situ material collected, including for instance results for field
duplicate/second-half sampling. • Crushing and pulverising QC tests were applied by ALS.
• Whether sample sizes are appropriate to the grain size of the material
being sampled.
Quality of assay data • The nature, quality and appropriateness of the assaying and • All samples were analysed by an appropriate high-grade aqua
and laboratory tests laboratory procedures used and whether the technique is considered regia ICP-AES method, ALS code ME-ICP41a Samples submitted to
partial or total. ALS were analysed for base metals and Au.
• For geophysical tools, spectrometers, handheld XRF instruments, etc, • Orion (purchased) CRMs were inserted every 10th sample and Orion
the parameters used in determining the analysis including instrument field duplicates every 20 samples.
make and model, reading times, calibrations factors applied and • A total of 6 CRMs were inserted. CRMs were alternated throughout the
their derivation, etc. sample stream and where possible matched to the sample material
• Nature of quality control procedures adopted (eg standards, blanks, being analysed.
duplicates, external laboratory checks) and whether acceptable • The average grade of the CRM used is 1.014 %Cu (AMIS0399). All 6
levels of accuracy (ie lack of bias) and precision have been CRMs returned acceptable results within 2 Standard Deviations of
established. the CRM average.
• Due to limited dataset, no plots are shown and there is not enough
Criteria JORC Code explanation Commentary
data to draw conclusive results, however the two duplicates
inserted showed excellent correlation
• Chip blanks are inserted at the beginning of each batch and after
any sample that may be considered high grade. Acceptable results
were returned with no contamination. Acceptable results were
returned with no contamination.
• No external laboratory checks have been carried out at this stage.
Verification of • The verification of significant intersections by either independent or • Orion’s exploration geologist is personally supervising the drilling
Sampling and alternative company personnel. and sampling along with a team of experienced geologists.
assaying • The use of twinned holes. • Twinning is used to confirm and verify the available historical drill holes
• Documentation of primary data, data entry procedures, data data, good correlation was obtained between OKWD102 and KW020.
verification, data storage (physical and electronic) protocols. More twinning results are expected.
• Discuss any adjustment to assay data. • The CP has reviewed the raw laboratory data and confirmed the
calculation of the significant intersections.
• No adjustments have been made to the assay data.
Location of data • Accuracy and quality of surveys used to locate drill holes (collar and • Collar positions of the holes were surveyed using a hand-held Garmin
points down-hole surveys), trenches, mine workings and other locations used GPS.
in Mineral Resource estimation. • On completion drill collars are capped and labelled.
• Specification of the grid system used. • Drill collars will be surveyed by a qualified surveyor on completion of the
• Quality and adequacy of topographic control. drilling program.
• The local South African LO17 WGS84 (Hartbeeshoek 94) grid system is
used.
• A REFLEX EZ-TRAC tool was used for the down-hole surveys.
• A high resolution and accurate DTM was generated and obtained from
Drone Photogrammetry. A DJI drone is used drape flying at 100m AGL
and approximately 45m line spacing. The imagery is processed using
AgiSoftTM software.
Data spacing and • Data spacing for reporting of Exploration Results. • Exploration holes testing potential strike-extent/continuation are drilled
distribution • Whether the data spacing and distribution is sufficient to establish the closely spaced along 25m to 30m drill lines.
degree of geological and grade continuity appropriate for the • Due to the irregular intrusive nature of the mineralisation, the drill
Mineral Resource and Ore Reserve estimation procedure(s) and spacing is kept tight.
classifications applied. • The drill data spacing is considered sufficient for this deposit type
• Whether sample compositing has been applied. geological and grade continuity.
• The drill data spacing is considered sufficient for this deposit type
geological and grade continuity. In the event of resource estimation,
the data spacing and distribution will be applicable.
• No samples were composited.
Criteria JORC Code explanation Commentary
Orientation of data in • Whether the orientation of sampling achieves unbiased sampling of • To achieve unbiased sampling, drilling is oriented as close as
relation to geological possible structures and the extent to which this is known, considering practically possible to perpendicular, or at a maximum achievable
structure the deposit type. angle, to the attitude of the mineralisation. Drill holes were inclined
• If the relationship between the drilling orientation and the orientation between -45° to -75° degrees.
of key mineralised structures is considered to have introduced a • No sampling bias is anticipated as a result of drill hole orientations
sampling bias, this should be assessed and reported if material.
Sample security • The measures taken to ensure sample security. • Chain of custody is managed by the Company. Samples were stored
on site in a secure locked building and then freighted directly to the
lab.
Audits or reviews • The results of any audits or reviews of sampling techniques and data. • No audits or reviews have been carried out to date.
Section 2 Reporting of Exploration Results
(Criteria listed in the preceding section also apply to this section.)
Criteria JORC Code explanation Commentary
Mineral tenement and • Type, reference name/number, location and ownership including • The mineral rights to the properties are vested in the State and the
land tenure status agreements or material issues with third parties such as joint ventures, Minerals and Petroleum Development Act, 2002, (MPRDA) regulates
partnerships, overriding royalties, native title interests, historical sites, the exploration and mining industry in South Africa.
wilderness or national park and environmental settings. • A prospecting right, NC30/5/1/1/2/12357PR, in accordance with
• The security of the tenure held at the time of reporting along with any section 17 of the MPRDA was granted to Bulletrap Copper Co (Pty) Ltd
known impediments to obtaining a licence to operate in the area. (BCC) to prospect for a period of five years effective from 14 January
2021.
• The prospecting right was granted for the minerals copper and
tungsten ore in respect of the farms portion of Portion 10, portion of
Portion 9 and Portion 11 of the farm Brakfontein No. 133, portion of
Portion 1 and portion of Portion 23 of the farm Melkboschkuil No 132,
situated within the administrative district of Namaqualand. The total
area measures 2547,0791 Ha in extent.
• A Section 102 application is in process with the authorities to add 26
minerals, including gold and silver.
• Orion, recently acquired 100% of the project through the BCC-Orion
Acquisition Agreement (refer ASX/JSE release 2 August 2021).
Exploration done by • Acknowledgment and appraisal of exploration by other parties. • Previous explorers in the region includes Newmont, Gold Field of SA and
other parties SAFTA. Exploration was aimed at Cu.
Geology • Deposit type, geological setting and style of mineralisation. • The tenements are located over the Central and Western parts of the
Okiep Copper District. The style of mineralisation is mafic hosted
orogenic Cu-mineralisation.
• Copper mineralisation is primarily associated with irregular, elongated
and steeply dipping Koperberg Suite mafic intrusives.
• The Koperberg Suite intrusives are mainly restricted to so-called “Steep
Structures” of extensive strike lengths and steeply dipping to the north.
• The Koperberg Suite consists of anorthosite, diorite and norite
intermediate to mafic rock types.
• Mineralisation usually occurs as blebs to disseminated Cu mineral
assemblages bornite > chalcopyrite > chalcocite and less pyrite and
pyrrhotite.
• The more mafic and magnetite-rich lithologies generally host the bulk
of and higher-grade mineralisation.
• The OCD has a long exploration and mining history, and the geology is
well known and understood.
Drill hole Information • A summary of all information material to the understanding of the • Refer to Table 3 for collar details of all completed drillholes and
exploration results including a tabulation of the following information historical twinned hole.
for all Material drill holes:
o easting and northing of the drill hole collar
o elevation or RL (Reduced Level – elevation above sea level in
metres) of the drill hole collar
o dip and azimuth of the hole
o down hole length and interception depth
o hole length.
• If the exclusion of this information is justified on the basis that the
information is not Material and this exclusion does not detract from
the understanding of the report, the Competent Person should clearly
explain why this is the case.
Data aggregation • In reporting Exploration Results, weighting averaging techniques, • A minimum 0.5%Cu cut-off was used to calculate intercepts.
methods maximum and/or minimum grade truncations (eg cutting of high • Allowance was made for 3m internal waste.
grades) and cut-off grades are usually Material and should be stated.
• A cut-off of 1.0 %Cu was used for the higher-grade inclusions.
• Where aggregate intercepts incorporate short lengths of high grade
• Weighted grades were calculated as follows; %Cu x sample length(m)
results and longer lengths of low grade results, the procedure used for
x Bulk Density.
such aggregation should be stated and some typical examples of
such aggregations should be shown in detail. • The CP is of the opinion that the above aggregation methods are
acceptable for this type of deposit.
• The assumptions used for any reporting of metal equivalent values
should be clearly stated. • No metal equivalents are reported.
• No capping of assay results was required.
Criteria JORC Code explanation Commentary
Relationship between • These relationships are particularly important in the reporting of • Drilling is generally oriented perpendicular, or at a maximum
mineralisation widths Exploration Results. achievable angle to, the attitude of the mineralisation.
and intercept lengths • If the geometry of the mineralisation with respect to the drill hole • Generally, drill hole inclinations ranged between -45° to -75° while the
angle is known, its nature should be reported. mineralisation is expected to dip close to 900.
• If it is not known and only the down hole lengths are reported, there • Only down holes lengths are reported.
should be a clear statement to this effect (eg ‘down hole length, true
width not known’).
Diagrams • Appropriate maps and sections (with scales) and tabulations of • Refer to text.
intercepts should be included for any significant discovery being • Drilling data was incorporated and monitored in 3D Leapfrog
reported These should include, but not be limited to a plan view of geological model based on the available historical drill data.
drill hole collar locations and appropriate sectional views.
Balanced reporting • Where comprehensive reporting of all Exploration Results is not • In the Competent Person’s opinion, the Exploration Results reported in
practicable, representative reporting of both low and high grades this announcement have been reported in a balanced manner.
and/or widths should be practiced to avoid misleading reporting of
Exploration Results.
Other substantive • Other exploration data, if meaningful and material, should be • The Company’s previous ASX releases have detailed exploration works.
exploration data reported including (but not limited to): geological observations; • High-resolution drone magnetic survey was carried-out and will assist in
geophysical survey results; geochemical survey results; bulk samples – future planning of additional drill holes.
size and method of treatment; metallurgical test results; bulk density,
• Drone (DJI 600M Pro) magnetics were done at 30m AGL and 50m line
groundwater, geotechnical and rock characteristics; potential
spacing.
deleterious or contaminating substances.
• Historical detailed surface mapping is interpreted and utilised during
drill hole planning.
• The GemSys GSMP-25U mag sensor specifically designed for drones has
been used.
• Where possible, bulk density measurements were made over the full
length of each individual sample of split core. Where not possible due
to incompetent (crushed or broken) core, a minimum of 80% of the
(half-core) sample was used. The bulk density is determined by
measuring and subtracting the wet weight from the dry weight using
an electronic scale. Care is taken to clean and zero the scale between
each weighing. The intact sample portion is first weighed in air and the
weight recorded. The sample is then weighed, while completely
submerged in clean water within a measuring container. The mass of
container and water are deducted for net submerged weight and
volume displacement read on measuring container. The sample is then
removed and placed back into the core tray in the correct position
and orientation. The procedure is repeated for each geological
sample interval. The data were recorded in the bulk density Data
Sheet. The bulk density is calculated for each sample using the formula:
BD = ____weight of sample_____________________
(weight of sample in air – weight of the sample in water)
Further work • The nature and scale of planned further work (eg tests for lateral • Drilling will continue on targets generated to date with the aim of
extensions or depth extensions or large-scale step-out drilling). adding confidence and/or tonnage.
• Diagrams clearly highlighting the areas of possible extensions, • Further surface geophysical surveys may inter allia include ground,
including the main geological interpretations and future drilling areas, drone and/or airborne EM, gravity and radiometrics.
provided this information is not commercially sensitive.
Date: 11-01-2022 08:00:00
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