Wrap Text
Prieska Project Near-Mine Exploration Commences As Deep Sulphide Drill-Out Program Approaches Completion
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
(“Orion” or “the Company”)
PRIESKA PROJECT NEAR-MINE EXPLORATION COMMENCES AS DEEP SULPHIDE DRILL-OUT PROGRAM APPROACHED COMPLETION
“Figures" referred to throughout this announcement can be viewed on the pdf version of the announcement,
available on the Company's website, www.orionminerals.com.au.
- Prieska Project drill-out program nearing completion, with continued high-grade results returned at the
Deep Sulphide Target.
- 94 intersections, including 15 intersections drilled for metallurgical test work, have been completed on
the Deep Sulphide Target of the Prieska Zn-Cu Project since May 2017.
- Near-mine exploration commences with data assimilation and interpretation, mapping and ground EM
surveys identifying an early priority target at the Annex Copper Deposit.
Orion’s Managing Director and CEO, Errol Smart, commented on the results:
“With us now nearing the completion of the Prieska Deeps drill-out, having drilled over 83,000m in 15 months,
we are very pleased to move onto the exploration for satellite deposits to the exceptional Prieska VMS deposit.
These large VMS bodies are known for their propensity of occurring in clusters. Prieska is one of the largest
known VMS deposits and the surrounding area has not benefitted from any modern exploration for more than
35 years.”
Orion Minerals Limited (ASX/JSE: ORN) (Orion or the Company) is pleased to announce initiation of near-
mine exploration surrounding the Prieska Zinc-Copper Project (Prieska Project), in the Northern Cape, South
Africa, and also to update on progress of the Mineral Resource drill-out at the Prieska Project, as the drill-out
program nears completion. Eight diamond drill rigs remain deployed for infill drilling to increase sample density
in the Deep Sulphide Mineral Resource, with the objective of achieving an updated Mineral Resource estimate,
including upgrade in resource categories in Q4 2018.
Since drilling commenced in May 2017, Orion has completed 39 mother holes and 55 deflections (including
15 deflections for metallurgical test work) into the Deep Sulphide Target on the Vardocube Prospecting Right
(Vardocube) and Repli Prospecting Right (Repli). Analytical values for eight mother hole intersections from
Vardocube and ten deflected intersections (eight from Vardocube and two from Repli) are awaited. Drilling
continues, with seven deflected holes currently in progress on Vardocube, while one mother hole continues to
test the steep dipping hinge area in the north-west of the Deep Sulphide Target on Repli.
Ten new intersections, four from Repli and six from Vardocube, are reported (Figures 1 to 5 and Table 1). At
Repli, the intersections are consistent with previously reported intersections. The intersections at Vardocube,
where limited historic drilling was done, are also consistent in grade with historic data, intersection widths,
confirming structure and width of the mineralised horizon (refer ASX release 9 April 2018).
To date, 9,462m of percussion pre-collar and 73,940m (49,666m at Repli and 24,274m at Vardocube) of
diamond drilling have been completed on the Deep Sulphide Target. An estimated 2,498m of diamond drilling
remains to be completed, before the Deep Sulphide Mineral Resource estimate (refer ASX release 9 April
2018) will be updated. Drilling is expected to be completed mid-October 2018.
Relevant details of intersections from surface drilling at the Deep Sulphide Target have been released in ASX
releases of 16 July 2018, 19 February 2018, 1 February 2018, 12 December 2017, 8 November 2017, 9
October 2017, 5 October 2017, 17 September 2017, 6 September 2017, 27 July 2017 and 17 July 2017, with
historical drilling detailed in ASX release of 16 July 2018 and 18 November 2015. Newly drilled significant
intersections are included in Table 1. All intersections quoted for the Deep Sulphide Target are length and
relative density weighted, following the procedure detailed in Appendix 1.
Table 1: New intersections from Deep Sulphide Target drilling at the Prieska Project in this release.
East North From To Length Cu Zn Au Ag
Drill hole (WGS84 (WGS84
(m) (m) (m) (%) (%) (g/t) (g/t)
LO23) LO23)
Repli
-67,254 -3,315,542 1128.45 1132.75 4.30 1.87 4.61 0.33 20
OCOD060_D4
-67,254 -3,315,542 1166.75 1168.30 1.55 0.78 7.57 0.21 8
OCOD115_D1 -68,303 -3,314,265 979.55 980.95 1.40 2.31 1.78 0.19 20
-67,171 -3,315,571 1087.26 1096.55 9.29 1.13 7.70 0.26 11
-67,171 3,315,571 1099.65 1103.40 3.75 3.05 1.10 0.51 28
OCOD120 -67,170 3,315,570 1105.40 1114.00 8.60 1.01 1.28 0.28 10
-67,170 3,315,570 1131.50 1136.70 5.20 0.86 7.18 0.18 9
-67,170 3,315,570 1137.70 1145.20 7.50 1.11 5.87 0.19 9
-67,145 -3,315,591 1084.30 1096.20 11.90 1.36 5.10 0.26 13
-67,144 -3,315,592 1099.00 1100.40 1.40 2.20 3.46 1.06 18
OCOD120_D1
-67,143 -3,315,593 1115.70 1127.75 12.05 1.40 5.40 0.32 13
-67,143 -3,315,594 1128.75 1130.90 2.15 0.27 6.53 0.10 4
Vardocube
OCOD121 -67,160 -3,315,681 1099.95 1104.15 4.20 1.72 4.99 0.37 22
OCOD122 -67,068 -3,315,656 1075.01 1078.04 3.03 1.98 6.11 0.19 14
OCOD123 -67,110 -3,315,697 1089.00 1095.35 6.35 1.12 8.31 0.19 10
OCOD124 -67,015 -3,315,739 1080.20 1083.50 3.30 0.76 5.27 0.11 8
OCOD125 -66,943 -3,315,728 1061.00 1065.00 4.00 0.62 4.40 0.12 8
OCOD128 -66,984 -3,315,788 1081.50 1084.05 2.55 1.28 6.69 0.16 9
1. All drilling is with long holes (>1000m) and deflected long holes with both azimuth and dip changing
materially from the collar to intersection. Coordinates of mid-point of intersection are presented in this table.
2. All intersections quoted are based on a minimum width of 1.0m and lower cut-off grades of 0.3% copper or
0.5% zinc. No top-cut has been applied to achieve the averages.
3. Quoted average grades are length and density weighted.
4. All intercept lengths are down-the-hole lengths and true widths are unknown.
Near-Mine Exploration – Annex Copper Deposit
The Bartotrax Prospecting Right (refer ASX release 4 April 2018, Figure 6) includes the Annex Volcanogenic
Massive Sulphide (VMS) Copper Deposit (Annex), located about 6,000m south of Hutchings Shaft, and was
discovered by Anglovaal in 1969.
Anglovaal diamond drilling at Annex in the 1970s and 1980s followed up on conductors detected by airborne
Input Electromagnetic (EM) methods and succeeded in delineating semi-massive to massive sulphide
mineralisation underneath a 35m-thick Dwyka tillite cap. Near-surface mineralisation was identified over a
strike length of 1,000m and followed down to 550m below surface by 42 diamond drill holes. The deposit
remains open at depth. Younger stratigraphic cover and general poor outcrop renders geological interpretation
of Annex problematic, but the current understanding indicates repetition of the Prieska mineralised stratigraphy
over a north-west – south-east trending set of folds (Figures 7 and 8).
Anglovaal (historic drilling) significant intersections at Annex include:
- 3.87m at 1.91% Cu and 0.49% Zn in VAX 19;
- 4.28m at 2.88% Cu and 0.34% Zn in VAX 26;
- 2.65m at 1.44% Cu and 0.33% Zn in VAX 27;
- 4.08m at 1.14% Cu and 0.41% Zn in VAX 29;
- 4.11m at 2.17% Cu and 0.54% Zn in VAX 32; and
- 4.77m at 1.39% Cu and 0.68% Zn in VAX 35.
Further details of the drilling information are presented in Appendix 2. Figures 9, 10 and 11 provide exploration
context, and allow a considered and balanced judgement of the significance of the results. Information on type
and method of sampling, relevant sample intervals and locations, methods of analysis, data aggregation
methods, land tenure status are listed in Appendix 2.
Orion commenced ground EM surveying to explore for possible strike and depth extensions of Annex in August
2018. Modern EM surveys have the benefit of far stronger transmitters and more sensitive detection systems
allowing for detection of deeper seated, blind mineralisation. Three loops of Fixed Loop Transient
Electromagnetic (FLTEM) surveys have now been completed by Orion using sensitive Super Conducting
Quantum Interference Devices (SQUID) detection systems. The loops cover both the known mineralisation at
Annex for orientation purposes and continue along strike to the west and east. An EM conductor has been
detected approximately 1,000m west of the known mineralisation with the top of conductor at 200m to 250m
below surface (Figure 7). Additional surveying to better define the extent of this conductor and an additional
loop testing along strike and to the east of known mineralisation are currently in progress. Diamond drilling will
commence on the EM target once the modelling is finalised.
The Magazine Antiform (Figures 7 and 8), and its down plunge extension, which presents a large, blind target
area and where Anglovaal geologists reported an alteration zone similar to the alteration at the Prieska Zn-Cu
deposit, is scheduled to be the next priority target for ground EM.
Errol Smart
Managing Director and CEO
18 September 2018
ENQUIRIES
Investors JSE Sponsor
Errol Smart – Managing Director & CEO Rick Irving
Denis Waddell – Chairman Merchantec Capital
T: +61 (0) 3 8080 7170 T: +27 (0) 11 325 6363
E: info@orionminerals.com.au E: rick@merchantec.co.za
Media
Michael Vaughan Barnaby Hayward
Fivemark Partners, Australia Tavistock, UK
T: +61 (0) 422 602 720 T: +44 (0) 207 920 3150
E: michael.vaughan@fivemark.com.au E: orion@tavistock.co.uk
Suite 617, 530 Little Collins Street
Melbourne, VIC, 3000
Competent Person’s Statement
The information in this report that relates to Exploration Results is based on information compiled by Mr JE
Potgieter (Pr.Sci.Nat.), a Competent Person who is a member of the South African Council for Natural Scientific
Professionals, a Recognised Professional Organisation (RPO). Mr Potgieter is a full-time employee of Orion.
Mr Potgieter 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. Mr Potgieter 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) for the reporting of Exploration Results for Prieska Deposit.
Section 1 Sampling Techniques and Data
(Criteria in this section apply to all succeeding sections.)
Criteria JORC Code explanation Commentary
Sampling - Nature and quality of sampling (e.g. cut channels, random chips, or - Drilling and sampling has been undertaken during three distinct periods
techniques specific specialised industry standard measurement tools appropriate since the discovery of mineralisation. These are pre-mine exploration
to the minerals under investigation, such as down hole gamma (1968-1971) and during mine operations (1972-1984) holes ("V", "D",
sondes, or handheld XRF instruments, etc.). These examples should and "F" prefixed holes) by Anglovaal Ltd (also known as the Anglovaal
not be taken as limiting the broad meaning of sampling. Group, “Anglovaal”), and current drilling (2017 to present) by Orion
- Include reference to measures taken to ensure sample representivity Minerals Ltd (Orion).
and the appropriate calibration of any measurement tools or systems
Anglovaal:
used.
- For diamond drilling carried out by Anglovaal between 1968 and 1984,
- Aspects of the determination of mineralisation that are Material to the
there is limited information available on sampling techniques for core.
Public Report.
However, with exploration and resource management being carried out
- In cases where ‘industry standard’ work has been done this would be under the supervision of Anglovaal, it is considered by the Competent
relatively simple (e.g. ‘reverse circulation drilling was used to obtain 1 Person that there would be procedures in place to industry best practice
m samples from which 3 kg was pulverised to produce a 30 g charge standard at that time. This is based on the Competent Persons
for fire assay’). In other cases more explanation may be required, knowledge of exploration carried out by Anglovaal and discussions with
such as where there is coarse gold that has inherent sampling personnel employed by Anglovaal.
problems. Unusual commodities or mineralisation types (e.g.
- The exploration and resource management were under the professional
submarine nodules) may warrant disclosure of detailed information.
supervision of Dr Danie Krige an internationally recognised expert of the
time who published peer reviewed papers based on the sampling data.
The sampling was successful in defining a resource estimate which was
used as the basis of successful mine development and operation over a
20-year period.
- Drilling of the original surface exploration holes was carried out 200m –
250m line spacing. Underground exploration holes were not drilled on a
regular spacing.
- Surface drill exploration samples were all sent to Anglovaal Research
Laboratory at Rand Leases Mine and underground drill samples to the
mine laboratory for analyses.
- No records on the sampling methodology.
Orion:
- Diamond core cut at core yard and half core taken as sample.
- Diamond core sampled on 1m intervals where possible, sample lengths
adjusted to ensure samples do not cross geological boundaries or other
features.
- Drilling at the Deep Sulphide Target was carried out, aiming to define an
approximate 100m x 100m pattern by use of “mother” holes and
deflections from these holes.
- Percussion / reverse circulation pre-collars (where used) sampled on a
composite basis.
- Mineralised zones are drilled using core drilling.
- Sampling carried out under supervision of a qualified geologist using
procedures outlined below including industry standard QA/QC.
- Samples submitted for analysis to ALS Chemex PTY Ltd (ALS) are
pulverised in its entirety at ALS and split to obtain a 0.2g sample for
digestion and analysis.
Drilling techniques - Drill type (e.g. core, reverse circulation, open-hole hammer, rotary air Anglovaal:
blast, auger, Bangka, sonic, etc.) and details (e.g. core diameter, - Records for core size are not available.
triple or standard tube, depth of diamond tails, face-sampling bit or - No record on core orientation.
other type, whether core is oriented and if so, by what method, etc.).
Orion:
- Diamond core drilling using NQ and BQ sized core. BQ core was only
drilled where problems were encountered in the original NQ drilled drill
hole and the drilling could not continue with NQ size.
- In the near-surface weathered zone HQ core was drilled.
- Pre-collar drilled using percussion drilling on certain holes (above
mineralisation).
- Core was orientated in holes selected for geotechnical studies.
Drill sample - Method of recording and assessing core and chip sample recoveries Anglovaal:
recovery and results assessed. - All mineralised intersections were done with core drilling.
- Measures taken to maximise sample recovery and ensure - Core recoveries are documented on the assay sheets. Core recoveries
representative nature of the samples. were measured for each "run".
- Whether a relationship exists between sample recovery and grade - In most V holes and all D and F holes, intersections were in hard rock
and whether sample bias may have occurred due to preferential and recoveries were generally good through the mineralisation.
loss/gain of fine/coarse material.
Orion:
- All mineralised intersections are done with core drilling.
- Core stick-ups reflecting the depth of the drill hole are recorded at the
rig at the end of each core run.
- A block with the depth of the hole written on it is placed in the core box
at the end of each run.
- 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 of the
run as recorded from the stick-up measured at the rig to determine the
core lost.
- Core recovery in all the mineralised intersections are good.
- No grade variation with recovery noted.
Logging - Whether core and chip samples have been geologically and Anglovaal:
geotechnically logged to a level of detail to support appropriate - All relevant intersections for V surface holes have been geologically
Mineral Resource estimation, mining studies and metallurgical logged by qualified geologists and all of this information is available. It is
studies. understood from historical reports and discussions with Anglovaal
- Whether logging is qualitative or quantitative in nature. Core (or geologists involved with the Prieska Mine that all intersections for D and
costean, channel, etc.) photography. F holes were logged by qualified geologists. The detail logs are
- The total length and percentage of the relevant intersections logged. currently not available.
- Downhole geotechnical information is available for some of the D and F
holes only. Downhole mineralogical logs are available for some D and F
holes.
Orion:
- Pre-collar percussion holes are logged by qualified geologists on 1m
intervals using visual inspection of washed drill chips. A hand held XRF
instrument is used to determine the presence of any metals.
- Core of the entire hole length was geologically logged band recorded on
standardised log sheets by qualified geologists.
- Qualitative logging of colour, grain size, weathering, structural fabric,
lithology, alteration type and sulphide mineralogy carried out.
- Quantitative estimate of sulphide mineralogy.
- Logs are recorded at the core yard and entered into digital templates at
the project office.
Sub-sampling - If core, whether cut or sawn and whether quarter, half or all core Anglovaal:
techniques and taken. - Details of sub-sampling techniques not available.
sample preparation - If non-core, whether riffled, tube sampled, rotary split, etc. and - Although no formal QC samples were inserted by the geologists at the
whether sampled wet or dry. time of drilling. The Anglovaal Research Laboratory produced their own
- For all sample types, the nature, quality and appropriateness of the standards, certified by other commercial laboratories which were
sample preparation technique. routinely inserted in batches at the laboratory. Duplicate samples were
- Quality control procedures adopted for all sub-sampling stages to also inserted to check for repeatability.
maximise representivity of samples. Orion:
- Measures taken to ensure that the sampling is representative of the in - Samples from percussion pre-collars are collected by spear sampling.
situ material collected, including for instance results for field
- Sampling on site aims to generate a < 2kg sub sample to enable the
duplicate/second-half sampling.
entire sample to be pulverised without further splitting.
- Whether sample sizes are appropriate to the grain size of the material
- Water is used in the dust depression proses during percussion drilling,
being sampled.
resulting in wet chip samples.
- BQ and NQ core cut at core yard and half core taken as sample.
- With core samples, the entire sample length is cut and sampled.
- Sample preparation is undertaken at ALS an ISO accredited laboratory.
ALS utilises industry best practise for sample preparation for analysis,
involving drying of samples, crushing to <5mm if required and then
pulverising so that +85% of the sample passes 75 microns.
- CRMs, blanks and duplicates are inserted and analysed with each
batch. Insertion rates for the current reporting is: CRMs = 10%, blanks =
5% and field duplicates = 2%.
Quality of assay data - The nature, quality and appropriateness of the assaying and Anglovaal:
and laboratory tests laboratory procedures used and whether the technique is considered - Surface drill exploration samples were all sent to Anglovaal Research
partial or total. Laboratory at Rand Leases Mine.
- For geophysical tools, spectrometers, handheld XRF instruments, - Underground drill hole samples were sent to the mine laboratory, where
etc., the parameters used in determining the analysis including the same analytical method was used.
instrument make and model, reading times, calibrations factors - Atomic Adsorption method was used with a Nitric-bromide digest.
applied and their derivation, etc. Underground drill hole samples were sent to the mine laboratory, where
- Nature of quality control procedures adopted (e.g. standards, blanks, the same analytical method was used.
duplicates, external laboratory checks) and whether acceptable levels - Although no formal QC samples were inserted with the drill samples of
of accuracy (i.e. lack of bias) and precision have been established. the exploration holes the Anglovaal Research Laboratory developed
their own standards, certified by other commercial laboratories and
those were used internally in the laboratory. Duplicate samples were
also inserted to check for repeatability.
Orion:
- Samples submitted to ALS were analysed for base metals, Au and Ag.
Analysis was by the Inductively Coupled Plasma and Optical Emission
Spectroscopy ("ICP-OES") methodology, using a four-acid digest.
- External quality control of the laboratory assays is monitored by the
insertion of blanks and CRMs.
- CRM samples show high accuracy and tight precision with no
consistent bias.
- Blank samples indicate no contamination, within the pre-determined
thresholds, during the sample preparation process.
- Laboratory samples show excellent accuracy and precision.
- ALS has their own internal QC protocols which include CRMs (5%),
blanks (2.5%) and duplicates (2.5%).
- External laboratory checks have been carried out.
Verification of - The verification of significant intersections by either independent or Anglovaal:
sampling and alternative company personnel. - No records available.
assaying - The use of twinned holes.
Orion:
- Documentation of primary data, data entry procedures, data
- The Competent Person is personally supervising the drilling and
verification, data storage (physical and electronic) protocols.
sampling along with a team of experienced geologists.
- Discuss any adjustment to assay data.
- The Competent Person reviewed the calculation of the significant
intersections.
- Twin holes are drilled to verify historical drill intersections (Anglovaal).
- For the EM survey, data are collected on site and validated by a
geophysical technician daily. Data (raw and processed) is sent to a
consultant geophysicist for review and quality control.
- No adjustments have been made to the assay data.
Location of data - Accuracy and quality of surveys used to locate drill holes (collar and Anglovaal:
points down-hole surveys), trenches, mine workings and other locations - All surface and underground hole collars were surveyed by qualified
used in Mineral Resource estimation. surveyors using a theodolite.
- Specification of the grid system used. - The historic mine survey data is in the old national Lo23 Clarke 1880
- Quality and adequacy of topographic control. coordinate system.
- Downhole surveys were carried out for most of the V holes and all of
the D and F holes. Methodology of the downhole surveys is not
recorded on the available hardcopy information but plans and sections
are meticulously plotted and signed off by a certified surveyor.
- Both Eastman and Sperry Sun instruments were used in the downhole
surveys.
- Significant deflections in the dips of the holes have been noted,
especially for the deeper holes. V holes with no downhole surveys are
shallower holes drilled earlier on in the initial exploration phase. These
holes intersected areas where the mineralisation is now largely mined
out.
- All hole positions have been converted to Lo23 WGS84 coordinates.
- Underground D and F holes are recorded in local "V" line and "O"
distance coordinates with local mine datum elevations. Level plans
have both the local V/O grid and Lo23 Clark 1880 grids plotted and this
has been used to define transformation parameters from local grid to
geographical coordinates. All hole positions have been converted to
Lo23 WGS84 coordinates.
Orion:
- Drill hole collar positions are laid out using a handheld GPS.
- After completion of the Orion drilling all collars were surveyed by a
qualified surveyor using a Trimble R8 differential GPS.
- Downhole surveys are completed using a North-Seeking Gyro
instrument.
- All survey data is in the WGS84 ellipsoid in the WG23 Zone with the
Hartebeeshoek 1994 Datum. The coordinates are also supplied in
Clarke 1880 and in UTM WGS84 Zone 34 (Southern Hemisphere).
Data spacing and - Data spacing for reporting of Exploration Results. Anglovaal:
distribution - Whether the data spacing and distribution is sufficient to establish the - Original exploration holes (V) were drilled on 200m - 250m spacing.
degree of geological and grade continuity appropriate for the Mineral - Underground drilled holes (D, F and R) were not drilled on a regular
Resource and Ore Reserve estimation procedure(s) and spaced grid.
classifications applied.
Orion:
- Whether sample compositing has been applied.
- At the Deep Sulphide Target drill holes aim to intersect mineralisation
on spacings sufficient to establish geological and grade continuity
appropriate for Mineral Resource and Ore Reserve estimations.
- Variography studies were carried out on both the historic and Orion data
set to determine the drill spacing for Mineral Resource estimates.
- No sample compositing was applied.
Orientation of data - Whether the orientation of sampling achieves unbiased sampling of - Historical and current drilling is oriented perpendicular, or at a maximum
in relation to possible structures and the extent to which this is known, considering achievable angle to, the attitude of the mineralisation.
geological structure the deposit type. - As a result, most holes intersect the mineralisation at an acceptable
- If the relationship between the drilling orientation and the orientation angle.
of key mineralised structures is considered to have introduced a - No sampling bias is anticipated as a result of hole orientations.
sampling bias, this should be assessed and reported if material. - EM surveys by Orion were completed in an orientation perpendicular to
the interpreted or intersected mineralisation.
Sample security - The measures taken to ensure sample security. Anglovaal:
- No details of sample security available. However, during the mining
operations the site was fenced and gated with security personnel
employed as part of the staff.
Orion:
- Chain of custody is managed throughout, and the policy managed
through an appropriate SOP. Samples are stored on site in a secure
locked building and then freighted directly to the laboratory.
Audits or reviews - The results of any audits or reviews of sampling techniques and data. Anglovaal:
- No records available.
Orion:
- SRK Consulting has carried out a review on the sampling techniques
and data.
Section 2 Reporting of Exploration Results
(Criteria listed in the preceding section also apply to this section.)
Mineral tenement - Type, reference name/number, location and ownership including - The Prospecting Rights are held by Repli Trading (Pty) Ltd and
and land tenure agreements or material issues with third parties such as joint Vardocube (Pty) Ltd, which are subsidiaries of Orion.
status ventures, partnerships, overriding royalties, native title interests, - The Prospecting Right areas covers a strike of 2460m for the Deep
historical sites, wilderness or national park and environmental Sulphide mineralisation.
settings. - All of the required shaft infrastructure and lateral access underground
- The security of the tenure held at the time of reporting along with any development is available within the two Prospecting Rights.
known impediments to obtaining a licence to operate in the area.
Exploration done by - Acknowledgment and appraisal of exploration by other parties. - All exploration and life of mine drilling (V, D and F holes) was done by
other parties Anglovaal, resulting in a substantial amount of hard copy data from
which Orion has been able to assess the prospectivity of the remaining
mineralisation.
- The Anglovaal exploration resulted in the delineation and development
of a large mine.
Geology - Deposit type, geological setting and style of mineralisation. - The Copperton deposit is a Volcanogenic Massive Sulphide (VMS)
deposit which is situated in the southernmost exposures of the north-
northwest trending Kakamas Terrain, which forms part of the Mid-
Proterozoic Namaqualand Metamorphic Complex.
- The deposit is hosted by the Copperton Formation of the Areachap
Group. The Areachap Group, also hosts several other but smaller VMS
deposits such as the Areachap, Boks Puts, Kantien Pan, Kielder, and
Annex Vogelstruisbult deposits.
- The structural sequence at the mine consists of a footwall Smouspan
Gneiss Member, Prieska Copper Mines Assemblage (PCMA), which
hosts the sulphide mineralisation, and the hangingwall Vogelstruisbult
Gneiss Member.
- The historically mined section of the deposit is confined to a tabular,
stratabound horizon in the northern limb of a refolded recumbent
synform, the axis of which plunges at approximately 5° to the south-
east.
- The mineralised zone outcrop has a strike of 2400m, is oxidised and /
or affected by leached and supergene enrichment to a depth of
approximately 100m and crops out as a well-developed gossan. It has a
dip of between 55° and 80° to the northeast at surface and a strike of
130° to the north. Current drilling indicates that the Deep Sulphides has
a strike length of at least 2860m in depth.
- The thickness of the mineralised zone exceeds 30m in places but
averages between 7m and 9m. The mineralised zone persists to a
depth of 1100m (as deep as 1228m in one section) after which it is
upturned due to the folding.
- The Deep Sulphide Target area located below the historical mined area,
comprises the steep down dip continuity ("steep limb and hinge zone”)
and from where it upturns to its subsequent synformal structure ("trough
zone").
- The morphology of the mineralised horizon in the eastern limb is well
mapped out by drilling and historic mining while the western limb up dip
extent is poorly tested and mapped.
Drill hole - A summary of all information material to the understanding of the - Drill hole collar coordinates, elevation, inclination and azimuth, down
Information exploration results including a tabulation of the following information hole length, interception depth and hole length are available in Orion’s
for all Material drill holes: geological database and are not all included in this release.
o easting and northing of the drill hole collar - Only the significant mineralised intersections and the easting and
o elevation or RL (Reduced Level – elevation above sea level in northing of these mineralised intercepts are presented in this release.
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, - Significant Intersections for the Deep Sulphide Target are calculated by
methods maximum and/or minimum grade truncations (e.g. cutting of high average of assays result > 0.3% copper or 0.5% zinc and weighted by
grades) and cut-off grades are usually Material and should be stated. the sample width and specific gravity of each sample.
- Where aggregate intercepts incorporate short lengths of high grade - Significant Intersections for the +105 Level Target are calculated by
results and longer lengths of low grade results, the procedure used average of assays result > 0.3% copper or 0.5% zinc and weighted by
for such aggregation should be stated and some typical examples of the sample width of each sample only.
such aggregations should be shown in detail. - In general, the significant intersections correspond strongly to
- The assumptions used for any reporting of metal equivalent values geological boundaries (massive sulphides) and are clearly
should be clearly stated. distinguishable from country rock / surrounding samples.
- No truncations have been applied at this stage for either Target.
Relationship - These relationships are particularly important in the reporting of - All intersection widths quoted are down hole widths.
between Exploration Results. - Most holes intersected the mineralisation perpendicular or at high angle
mineralisation - If the geometry of the mineralisation with respect to the drill hole to the attitude of the mineralisation.
widths and intercept angle is known, its nature should be reported. - The geometry of the Deep Sulphide mineralisation is complex and true
lengths - If it is not known and only the down hole lengths are reported, there widths can be obtained from the three-dimensional wireframe created
should be a clear statement to this effect (e.g. ‘down hole length, true of the mineralisation.
width not known’).
Diagrams - Appropriate maps and sections (with scales) and tabulations of - Appropriate diagrams (plan, cross section and long section) are shown
intercepts should be included for any significant discovery being in the release text.
reported. These should include, but not be limited to a plan view of
drill hole collar locations and appropriate sectional views.
Balanced reporting - Where comprehensive reporting of all Exploration Results is not - All drill hole results referred to in the release are listed in Table 1. All
practicable, representative reporting of both low and high grades other drill holes have been detailed in previous releases as referred to
and/or widths should be practiced to avoid misleading reporting of in the text.
Exploration Results. - The Company has presented all available information in this report in a
balanced manner and has provided appropriate context for the
Exploration Results to allow a considered and balanced judgement of
their significance.
Other substantive - Other exploration data, if meaningful and material, should be reported - Hardcopy maps are available for a range of other exploration data. This
exploration data including (but not limited to): geological observations; geophysical includes mine survey plans, geological maps, airborne magnetics,
survey results; geochemical survey results; bulk samples – size and ground magnetics, electromagnetics, gravity and induced polarisation.
method of treatment; metallurgical test results; bulk density, All available exploration data has been viewed by the Competent
groundwater, geotechnical and rock characteristics; potential Person.
deleterious or contaminating substances. -The mine operated from 1972 to 1991 and is reported to have milled a
total of 45.68 Mt of ore at a grade of 1.11% copper and 2.62% zinc,
recovering 0.43 Mt of copper and 1.01 Mt of zinc. Detailed production
and metallurgical results are available for the life of the mine.
- In addition, 1.76 Mt of pyrite concentrates and 8,403 t of lead
concentrates as well as amounts of silver and gold were recovered.
- Copper and zinc recoveries averaged 84.9% and 84.3% respectively
during the life of the mine.
Further work - The nature and scale of planned further work (e.g. tests for lateral - Drilling is on-going to test the Deep Sulphide Target.
extensions or depth extensions or large-scale step-out drilling).
- Diagrams clearly highlighting the areas of possible extensions,
including the main geological interpretations and future drilling areas,
provided this information is not commercially sensitive.
Appendix 2: The following table is provided as a requirement under the JORC Code (2012) requirements for the reporting of Exploration Results for the Annex
Copper Deposit.
Section 2 Reporting of Exploration Results
Mineral tenement - Type, reference name/number, location and ownership including - The Prospecting Right over the Annex Copper Deposit (Annex) is held
and land tenure agreements or material issues with third parties such as joint by Bartotrax (Pty) Ltd, which is a subsidiary of Orion.
status ventures, partnerships, overriding royalties, native title interests,
historical sites, wilderness or national park and environmental
settings.
- The security of the tenure held at the time of reporting along with any
known impediments to obtaining a licence to operate in the area.
Exploration done by - Acknowledgment and appraisal of exploration by other parties. - Previous exploration was carried out by Anglovaal Limited.
other parties - Exploration activities included geological mapping, surface geochemical
sampling, geophysical surveying, and diamond core drilling.
Geology - Deposit type, geological setting and style of mineralisation. - Annex is a Volcanogenic Massive Sulphide (VMS) deposit which is
situated in the southernmost exposures of the north-northwest trending
Kakamas Terrain, which forms part of the Mid-Proterozoic
Namaqualand Metamorphic Complex.
- The deposit is hosted by the Copperton Formation of the Areachap
Group. The Areachap Group also hosts several other VMS deposits of
which the nearby Prieska deposit (Prieska) is the largest.
- Poor outcrop renders geological interpretation of the geological setting
of Annex problematic, but the current understanding of the geology
indicates repetition of the stratigraphy at Prieska over a northwest –
southeast trending set of folds.
- The lithologies at Annex differ slightly from that of Prieska in that the
host rock of the sulphide mineralisation is chlorite-biotite schist and the
presence of meta-pelitic rocks which are not developed at Prieska.
- The deposit is covered by younger Dwyka tillites, but drilling has
delineated the mineralised zone over a strike of 1000m and to a depth
of 550m. It has a dip of between 40° and 60° to the south and strike
west-northwest.
- The thickness of the mineralised zone varies up to 11m.
Drill hole - A summary of all information material to the understanding of the - Summary reports including drilling information including a plan showing
Information exploration results including a tabulation of the following information collars for 42 diamond drill holes and a longitudinal section showing
for all Material drill holes: reported intersections are available. Detailed drill hole information is
o easting and northing of the drill hole collar only available for 10 diamond drill holes.
o elevation or RL (Reduced Level – elevation above sea level in - Drill collar localities for 31 holes have been confirmed using a
metres) of the drill hole collar differential GPS.
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, - Reported widths and grades are understood to be aggregated results
methods maximum and/or minimum grade truncations (e.g. cutting of high - Data aggregation methods applied by Anglovaal geologists are
grades) and cut-off grades are usually Material and should be stated. uncertain.
- Where aggregate intercepts incorporate short lengths of high grade
results and longer lengths of low grade results, the procedure used
for such aggregation should be stated and some typical examples of
such aggregations should be shown in detail.
- The assumptions used for any reporting of metal equivalent values
should be clearly stated.
Relationship - These relationships are particularly important in the reporting of Drill widths are understood to be down hole widths.
between Exploration Results. Intersections are interpreted to be at high angle to the mineralisation.
mineralisation - If the geometry of the mineralisation with respect to the drill hole
widths and intercept angle is known, its nature should be reported.
lengths - If it is not known and only the down hole lengths are reported, there
should be a clear statement to this effect (e.g. ‘down hole length, true
width not known’).
Diagrams - Appropriate maps and sections (with scales) and tabulations of Drill collar plan and sections are shown in Figures 9, 10 and 11.
intercepts should be included for any significant discovery being
reported. These should include, but not be limited to a plan view of
drill hole collar locations and appropriate sectional views.
Balanced reporting - Where comprehensive reporting of all Exploration Results is not Contoured copper grades of intersections are shown in Figure 11.
practicable, representative reporting of both low and high grades The Company has presented all available information in this report in a
and/or widths should be practiced to avoid misleading reporting of balanced manner and has provided appropriate context for the
Exploration Results. Exploration Results to allow a considered and balanced judgement of
their significance.
Other substantive - Other exploration data, if meaningful and material, should be reported - Geological mapping, geochemical sampling, and airborne and ground
exploration data including (but not limited to): geological observations; geophysical geophysical programs were undertaken by Anglovaal, using the
survey results; geochemical survey results; bulk samples – size and equipment and methods available at that time. These geophysical and
method of treatment; metallurgical test results; bulk density, geochemical data are not all available.
groundwater, geotechnical and rock characteristics; potential - Ground-based Fixed Loop Electromagnetic (EM) surveying is currently
deleterious or contaminating substances. underway and only preliminary results are available.
- Hardcopy maps are available for the geology, airborne EM and
magnetic data.
Hardcopies of a longitudinal projection and a few cross sections
showing drill hole intersection widths and grades are available.
- Where still recognisable in the field, drill hole collars were surveyed
using a GPS.
Further work - The nature and scale of planned further work (e.g. tests for lateral - Further ground-based EM surveying will be undertaken to cover the
extensions or depth extensions or large-scale step-out drilling). area immediately along strike of the known mineralisation.
- Diagrams clearly highlighting the areas of possible extensions, - Diamond drilling is planned to follow-up any EM conductors.
including the main geological interpretations and future drilling areas, - A SkyTEMTM airborne survey is planned over the entire prospecting
provided this information is not commercially sensitive. right area.
Date: 18/09/2018 09:02:00 Produced by the JSE SENS Department. The SENS service is an information dissemination service administered by the JSE Limited ('JSE').
The JSE does not, whether expressly, tacitly or implicitly, represent, warrant or in any way guarantee the truth, accuracy or completeness of
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