Wrap Text
Drilling Confirms Extension of Thick Massive Sulphide Prieska Zinc-Copper Project
Orion Minerals NL
Incorporated in the Commonwealth of Australia
Australian Company Number 098 939 274
ASX share code: ORN
JSE share code: ORN
ISIN: AU000000ORN1
DRILLING CONFIRMS EXTENSION OF THICK MASSIVE SULPHIDE PRIESKA ZINC-COPPER PROJECT
- Drilling continues at the Prieska Zinc-Copper Project with positive assay results received for another 4 intersections.
- Drilling extends margin of wide massive sulphide mineralisation, which remains open down dip.
- Latest intersections also infill and improve confidence in the trough zone of the North-West Target Area.
- 56 intersections, including intersections for metallurgical test work have now been completed in the Deep Sulphide
Target and its extensions since May 2017.
- Drilling continues, currently focussed up-dip in the hinge zone of the North-West Target Area.
The new intersections include:
- OCOD087_D2 intersected 4.5m at 5.39% Zn, 0.08% Cu, 0.17g/t Au and 5g/t Ag from 1,105.0m and 14.0m at 4.23%
Zn, 0.59% Cu, 0.18g/t Au and 5g/t Ag from 1,122.0m.
- OCOD101_D1 intersected 5.23m at 5.27% Zn, 1.27% Cu, 0.21g/t Au and 11g/t Ag from 1,070.5m.
- OCOD103_D2 intersected 14.09m at 2.82% Zn, 1.53% Cu, 0.51g/t Au and 11g/t Ag from 1,089.0m, including 3.0m
at 1.95% Zn, 4.22% Cu, 1.49g/t Au and 31g/t Ag from 1,099.0m.
- OCOD110 intersected 5.0m at 4.83% Zn, 0.74% Cu, 0.22 g/t Au and 15g/t Ag from 1,060.0m.
Orion Minerals Limited (ASX/JSE: ORN) (Orion or the Company) is pleased to announce further encouraging results from
drilling at the Prieska Zinc-Copper Project (Prieska Project). Drill hole OCOD087_D2, drilled on the south-west margin of
the NW Trough Target, intersected 14m of mineralised massive sulphide (containing mixed, fine to coarse grained
cumulates and veinlets of metal sulphide minerals typically of composition pyrite > pyrrhotite > sphalerite > chalcopyrite
with combined content >40%). This intersection confirms that the thick massive sulphide mineralisation included in the
Inferred Resource reported in the ASX release on 8 February 2018, is open down-dip and to the south-west and emphasises
potential to increase the current Mineral Resource in the NW Trough Target area.
“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.
Orion’s Managing Director and CEO, Errol Smart, commented on the results:
“We continue to be pleased with the drilling and exploration results at the Prieska Project. While the area initially targeted
has yielded greater tonnages than anticipated, our drilling continues to discover significant extensions of thick massive
sulphide mineralisation, which remains open down dip.”
Deep Sulphide Target Drilling Results
Orion has now completed 56 intersections from 24 mother holes into the Deep Sulphide Target. The intersections have
been achieved at vertical depths of 974m – 1,193m and have required 9,462m of percussion pre-collar and 33,713m of
diamond drilling. All completed intersections are now reported, while 5 holes are currently in progress testing up-dip
extensions.
Latest Drilling Results
Hole OCOD087_D2 intersected a mineralised lens 12.5m above the main massive sulphide horizon. The intersection of
4.5m at 5.39% Zn, 0.08% Cu, 0.17g/t Au and 5g/t Ag from 1,105.0m extends a new target of a stacked massive sulphide
lens, first intersected about 25m up-dip in OCOD052 and OCOD052_D2 (refer ASX releases 6 September 2017 and 27
July 2017) (Figure 3). OCOD087_D2 further intersected 14.0m at 4.23% Zn, 0.59% Cu, 0.18g/t Au and 5g/t Ag from
1,122.0m on the main massive sulphide horizon. This intersection extends the limit of thick massive sulphide target beyond
where it was intersected 25m up dip in OCOD052. The thick mineralisation remains open down dip (Figure 3 and Table 1)
and will continue to be tested with step-out drilling.
Hole ID Distance (m) from OCOD087_D2 Width (m) Zn (%) Cu (%) Au (g/t) Ag (g/t)
OCOD087_D2 0 14.00 4.23 0.59 0.18 5
OCOD052 25 16.15 3.30 1.72 0.26 14
OCOD052_D2 33 15.92 5.55 0.95 0.22 8
Table 1: Table of Intersections comparing OCOD087_D2, OCOD052 and OCOD052_D2.
Holes OCOD101_D1 and OCOD110 were drilled as infill intersections between historical hole F2027 and Orion hole
OCOD101. OCOD101_D1 intersected 5.23m at 5.27% Zn, 1.27% Cu, 0.21g/t Au and 11g/t Ag from 1,071.5m and
OCOD110 intersected 5.0m at 4.83% Zn, 0.74% Cu 0.22% Au and 15g/t Ag from 1,060.0m. These holes extend the
mineralisation in between historical drilling.
Hole ID Distance (m) from OCOD101_D1 Width (m) Zn (%) Cu (%) Au (g/t) Ag (g/t)
D395 46 2.14 5.67 0.71 NA NA
OCOD101 25 7.04 3.58 1.10 0.22 9
OCOD101_D1 0 5.23 5.27 1.27 0.21 11
OCOD110 20 5.00 4.83 0.74 0.22 15
F2027 33 2.13 1.49 1.47 NA NA
Table 2: Table of Intersections D395, OCOD101, OCOD101_D1, OCOD110 and F2027.
Hole OCOD103_D2, drilled as an up-dip deflection from OCOD103, intersected 14.09m at 2.82% Zn, 1.53% Cu, 0.51g/t
Au and 11g/t Ag from 1,089.0m.
Hole ID Distance (m) from OCOD0103_D2 Width (m) Zn (%) Cu (%) Au (g/t) Ag (g/t)
OCOD103 17 8.40 1.99 0.65 0.08 7
OCOD103_D2 0 14.09 2.82 1.53 0.51 11
Table 3: Table of intersections OCOD103, OCOD103_D2.
Drilling is currently focussed on the up-dip area in the NW Hinge Target, which is technically more challenging to drill, and
slower drilling progress is anticipated. Permitting of the SE Target extension is anticipated to be completed in coming weeks
so that drilling can continue to test the strike extent of the Deep Sulphide Target.
All significant intersections from surface drilling at the Deep Sulphide Target have been released in ASX releases of 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 18 November 2015. New significant
intersections are included in Appendix 1. All intersections quoted for the Deep Sulphide Target are length and specific
gravity weighted, following the procedure detailed in Appendix 2.
All significant intersections from surface and underground drilling at the +105 Target have been released in ASX releases
of 12 December 2017, 19 September 2017 and 6 September 2017.
Errol Smart
Managing Director and CEO
19 February 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) 787 955 1355
E: michael.vaughan@fivemark.com.au E: orion@tavistock.co.uk
Suite 617, 530 Little Collins Street
Melbourne, VIC, 3000
Competent Persons Statement
The information in this report that relates to Orion’s Exploration Results at the Prieska Project complies 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 Mr Errol Smart, Orion Minerals Managing Director. Mr Smart (PrSciNat) is registered with the
South African Council for Natural Scientific Professionals, a Recognised Overseas Professional Organisation (ROPO) for JORC purposes
and 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 Smart consents to the inclusion
in this announcement of the matters based on his information in the form and context in which it appears. The Exploration Results are
based on standard industry practises for drilling, logging, sampling, assay methods including quality assurance and quality control
measures as detailed in Appendix 2.
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. 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: Table of intersections from Deep Sulphide Target drilling at the Prieska Project in this release.
East North From To Length Cu Zn Au Ag
Drill hole
(UTMz34S) (UTMz34S) (m) (m) (m) (%) (%) (g/t) (g/t)
624 392 6 686 439 1105.00 1109.50 4.50 0.08 5.39 0.17 5
OCOD087_D2
1122.00 1136.00 14.00 0.59 4.23 0.18 5
OCOD101_D1 624 250 6 686 339 1070.50 1075.73 5.23 1.27 5.27 0.21 11
624 448 6 686 377 1089.00 1103.09 14.09 1.53 2.82 0.51 11
OCOD103_D2
including 1099.00 1102.00 3.00 4.22 1.95 1.49 31
OCOD110 624 547 6 686 303 1060.00 1065.00 5.00 0.74 4.83 0.22 15
Appendix 2: The following tables are provided to ensure compliance with the JORC Code (2012) requirements for the reporting of Exploration Results for the
Prieska 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 - Diamond core cut at core yard and half core taken as sample.
specific specialised industry standard measurement tools appropriate - Diamond core sampled on 1m intervals where possible, sample lengths
to the minerals under investigation, such as down hole gamma sondes, adjusted to ensure samples do not cross geological boundaries or other
or handheld XRF instruments, etc.). These examples should not be features.
taken as limiting the broad meaning of sampling. - Drilling at the Deep Sulphide Target carried out aiming to define an
- Include reference to measures taken to ensure sample representivity approximate 100m x 100m pattern by use of “mother” holes and
and the appropriate calibration of any measurement tools or systems deflections from these holes.
used. - Drilling at the +105 Level Target carried out aiming to define an
- Aspects of the determination of mineralisation that are Material to the approximate 45m x 45m pattern.
Public Report. - Percussion / reverse circulation pre-collars (where used) sampled on a
- In cases where ‘industry standard’ work has been done this would be composite basis.
relatively simple (e.g. ‘reverse circulation drilling was used to obtain 1 - Mineralised zones are drilled using core drilling.
m samples from which 3 kg was pulverised to produce a 30 g charge - Sampling carried out under supervision using procedures outlined below
for fire assay’). In other cases more explanation may be required, such including industry standard QA/QC.
as where there is coarse gold that has inherent sampling problems. - Samples submitted for analysis to ALS is pulverised in its entirety at ALS
Unusual commodities or mineralisation types (e.g. submarine nodules) and split to obtain a 0.2g sample for digestion and analysis.
may warrant disclosure of detailed information. - Downhole EM survey carried out using standard techniques.
Drilling techniques - Drill type (e.g. core, reverse circulation, open-hole hammer, rotary air - Diamond core drilling using NQ and BQ sized core.
blast, auger, Bangka, sonic, etc.) and details (e.g. core diameter, triple - Pre-collar drilled using percussion drilling on certain holes (above
or standard tube, depth of diamond tails, face-sampling bit or other mineralisation).
type, whether core is oriented and if so, by what method, etc.).
Drill sample recovery - Method of recording and assessing core and chip sample recoveries - All mineralised intersections are done with core drilling.
and results assessed. - Core stick-ups reflecting the depth of the drill hole are recorded at the
- Measures taken to maximise sample recovery and ensure rig at the end of each core run.
representative nature of the samples. - A block with the depth of the hole written on it is placed in the core box
- Whether a relationship exists between sample recovery and grade at the end of each run.
and whether sample bias may have occurred due to preferential - At the core yard, the length of core in the core box is measured for
loss/gain of fine/coarse material. 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.
- No grade variation with recovery noted.
Logging - Whether core and chip samples have been geologically and - All percussion holes are logged on 1m intervals using visual inspection of
geotechnically logged to a level of detail to support appropriate washed drill chips and both full. Core is logged by geology and
Mineral Resource estimation, mining studies and metallurgical studies. recorded between geological contacts by qualified geologists.
- Whether logging is qualitative or quantitative in nature. Core (or - Qualitative logging of colour, grainsize, weathering, structural fabric,
costean, channel, etc.) photography. lithology, alteration type and sulphide mineralogy carried out.
- The total length and percentage of the relevant intersections logged. - Quantitative estimate of sulphide mineralogy and quartz veining.
- 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 - BQ and NQ core cut at core yard and half core taken as sample.
techniques and taken. - Samples from percussion pre-collars are collected by spear sampling.
sample preparation - If non-core, whether riffled, tube sampled, rotary split, etc. and - Sampling on site aims to generate a < 2kg sub sample to enable the
whether sampled wet or dry. entire sample to be pulverised without further splitting.
- For all sample types, the nature, quality and appropriateness of the - Water is used in the dust depression proses during percussion drilling,
sample preparation technique. resulting in wet chip samples.
- Quality control procedures adopted for all sub-sampling stages to - With core samples, the entire sample length is cut and sampled.
maximise representivity of samples. - Sample preparation is undertaken at ALS Laboratory Johannesburg, an
- Measures taken to ensure that the sampling is representative of the in ISO accredited laboratory. ALS utilises industry best practise for sample
situ material collected, including for instance results for field preparation for analysis involving drying of samples, crushing to <5mm if
duplicate/second-half sampling. required and then pulverising so that +85% of the sample passes 75
- Whether sample sizes are appropriate to the grain size of the material microns.
being sampled. - CRM’s, blanks and replicates are inserted every 30 samples and
analysed with each batch.
- Lab supplied CRM’s, blanks and replicates are analysed with each
batch.
- Specific gravity measurements are made over the full length of each
individual sample on split core where possible. Where not possible due
to crushed or broken core, a minimum of 80% of the core sample is
used. The specific gravity is determined by measuring and subtracting
the wet weight from the dry weight using an electronic density scale.
Care is taken to clean and zero the scale between each weighing.
- The sample is first weighed in air and the weight recorded. The sample is
then weighed, while completely submerged in clean water within a
measuring beaker. The mass of beaker and water are deducted for net
submerged weight and volume displacement read on measuring
beaker.
- 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 is recorded in the Specific Gravity Data Sheet. The specific
gravity is calculated for each sample using the formula:
SG = weight of sample
(weight of sample in air minus the weight of the sample in water).
Quality of assay data - The nature, quality and appropriateness of the assaying and - Samples from drilling were submitted to ALS Chemex in Johannesburg.
and laboratory tests laboratory procedures used and whether the technique is considered Samples were analysed for base metals using a four acid digest and
partial or total. ICP-OES and for gold by fire assay with AAS finish.
- For geophysical tools, spectrometers, handheld XRF instruments, etc., - External quality assurance of the laboratory assays is monitored by the
the parameters used in determining the analysis including instrument insertion of blanks, duplicates and certified reference materials (CRM)
make and model, reading times, calibrations factors applied and their - Coarse field duplicates consisting of a split sub-sample of the original
derivation, etc. crushed sample material.
- Nature of quality control procedures adopted (e.g. standards, blanks, - Three CRMs are alternated through the sample stream and where
duplicates, external laboratory checks) and whether acceptable possible matched to the material being drilled.
levels of accuracy (i.e. lack of bias) and precision have been - Two blanks are used (pulp and chips).
established. - No external laboratory checks have been carried out at this stage.
- Down hole EM surveys are carried out using a 3 component Digi-Atlantis
probe and ultra high power transmitter.
- Loop size of 1800m x 600m are used with continuous measurements
taken as the probe travels into the hole and out again.
- Surface TDEM surveys are carried out using a Supracon Jesse Beep squid
sensor and ultra high power transmitter with a Smartem 24 receiver.
Verification of - The verification of significant intersections by either independent or - Orion’s executive geologist is personally supervising the drilling and
sampling and alternative company personnel. sampling along with a team of experienced geologists.
assaying - The use of twinned holes. - The Managing Director and the executive geologist have reviewed the
- Documentation of primary data, data entry procedures, data raw laboratory data and confirmed the calculation of the significant
verification, data storage (physical and electronic) protocols. intersections.
- Discuss any adjustment to assay data. - For the EM survey, data is 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.
Location of data points - Accuracy and quality of surveys used to locate drill holes (collar and - Collar data has been laid out using a handheld GPS and these
down-hole surveys), trenches, mine workings and other locations used coordinates are reported here.
in Mineral Resource estimation. - All of the Orion drill hole collars are surveyed by a qualified surveyor
- Specification of the grid system used. using a differential GPS which may result in minor adjustments to
- Quality and adequacy of topographic control. coordinate data.
- Downhole surveys are completed using a North-Seeking Gyro
instrument.
- The historic mine survey data is in the old national Clarke 1880
coordinate system. All data is collected the surveyor is in Clarke 1880
and in UTM WGS84 Zone 34 (Southern Hemisphere). UTM WGS84 Zone 34
coordinates are reported above.
Data spacing and - Data spacing for reporting of Exploration Results. - At the Deep Sulphide Target drill holes aim to intersect mineralisation on
distribution - Whether the data spacing and distribution is sufficient to establish the approximately 100m x 100m spacing with infill drilling to be carried out in
degree of geological and grade continuity appropriate for the Mineral areas of interest as determined by results.
Resource and Ore Reserve estimation procedure(s) and classifications - At the +105 Level Target drill holes aim to intersect mineralisation on
applied. approximately 45m x 45m spacing with infill drilling to be carried out in
- Whether sample compositing has been applied. areas of interest as determined by results.
- Variography studies were carried out on the historic data set for both
Targets to determine the drill spacing for Mineral Resource estimates.
Orientation of data in - Whether the orientation of sampling achieves unbiased sampling of - Drilling is oriented perpendicular, or at a maximum achievable angle to,
relation to geological possible structures and the extent to which this is known, considering the attitude of the mineralisation.
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 - Where surface access or geotechnical conditions do not allow access
sampling bias, this should be assessed and reported if material. to optimal drill collar positions, holes may be inclined.
- The intersections will be corrected once the mineralised zone is
modelled in three dimensions and local attitude can be accurately
determined.
- No sampling bias is anticipated as a result of hole orientations.
- EM surveys are completed in an orientation perpendicular to the
interpreted or intersected mineralisation.
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 at this stage.
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 Prospecting Right is held by a subsidiary company of Agama
land tenure status agreements or material issues with third parties such as joint ventures, Exploration and Mining (Pty) Ltd (Agama), which is a wholly owned
partnerships, overriding royalties, native title interests, historical sites, subsidiary of Orion. As such, Orion effectively holds a 73.33% interest in
wilderness or national park and environmental settings. the project.
- The security of the tenure held at the time of reporting along with any - The Prospecting Right covers a strike of 2200m for the Deep Sulphide
known impediments to obtaining a licence to operate in the area. mineralisation out of a total interpreted strike of 2800m.
- The Prospecting Right covers the complete known strike of the +105
Level Target.
- All of the required shaft infrastructure and lateral access underground
development is available within the Prospecting Right.
Exploration done by - Acknowledgment and appraisal of exploration by other parties. Deep Sulphide Target
other parties - All exploration and life of mine drilling (V, D and F holes) was done by
Anglovaal, resulting in a substantial amount of hard copy data from
which the Company has been able to assess the prospectivity of the
remaining mineralisation.
- The Anglovaal exploration resulted in the delineation and development
of a large mine.
+105 Level Target
- The 2012 drilling of the NW section of the +105 Level Target was carried
out by the previous owners of the Subsidiary (Orion acquired the
subsidiary in March 2017).
Geology - Deposit type, geological setting and style of mineralisation. - The Copperton deposit is a Volcanogenic Massive Sulphide deposit. The
deposit is contained in the Areachap Group, which also hosts the Boks
Puts, Areachap, Kielder, Annex Vogelstruisbult and Kantienpan deposits.
- The historically mined section of the deposit is confined to a tabular,
stratabound massive sulphide horizon containing mixed, fine to coarse
grained cumulates and veinlets of metal sulphide minerals typically of
composition pyrite > pyrrhotite > sphalerite > chalcopyrite with
combined content >40%, in the northern limb of a refolded recumbent
synform which plunges at approximately 45° to the southeast. It is hosted
within deformed gneisses of the Copperton Formation, which have
been dated at 1285 Ma and forms part of the Namaqualand
Metamorphic Complex.
- The mineralised zone outcrop has a strike of 2400m, was oxidised and /
or affected by leached and supergene enrichment to a depth of
approximately 100m, and outcrops 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. The width of the mineralised zone exceeds 35m in
places but averages between 7m and 9m. The mineralised zone persists
to a depth of 1100m (as deep as 1200m in one section) after which it is
upturned.
- The +105 Level Target area comprises the oxide / supergene / mixed
zone (and a zone of remnant primary sulphides) situated from above
the upper limit of mining at approximately 100m depth up to surface.
Drill hole Information - A summary of all information material to the understanding of the - All Significant Intersections, location data and other drill hole information
exploration results including a tabulation of the following information is available in electronic format.
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, - 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 the
grades) and cut-off grades are usually Material and should be stated. 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 for average of assays result > 0.3% copper or 0.5% zinc and weighted by the
such aggregation should be stated and some typical examples of sample width of each sample only.
such aggregations should be shown in detail. - In general, the significant intersections correspond strongly to geological
- The assumptions used for any reporting of metal equivalent values boundaries (massive sulphides) and are clearly distinguishable from
should be clearly stated. country rock / surrounding samples.
- No truncations have been applied at this stage for either Target.
Relationship between - These relationships are particularly important in the reporting of - All intersection widths quoted are down hole widths.
mineralisation widths Exploration Results. - Most holes intersected the mineralisation perpendicular or at high angle
and intercept lengths - If the geometry of the mineralisation with respect to the drill hole angle to the attitude of the mineralisation.
is known, its nature should be reported. - The mineralisation has complex geometry and mineralisation widths
- If it is not known and only the down hole lengths are reported, there need to be estimated based on interpretation of surrounding intercepts.
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 - Appropriate diagrams (plan, cross section and long section) are shown
intercepts should be included for any significant discovery being in the announcement 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 announcement, are listed in
practicable, representative reporting of both low and high grades Appendix 1. All other drill holes, including those with no mineralisation,
and/or widths should be practiced to avoid misleading reporting of have been detailed in previous announcements as detailed in the text.
Exploration Results.
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.
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 ongoing 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.
Date: 19/02/2018 08:23:00 Produced by the JSE SENS Department. The SENS service is an information dissemination service administered by the JSE Limited ('JSE').
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