Wrap Text
Continued Positive Drilling Results from 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
CONTINUED POSITIVE DRILLING RESULTS FROM PRIESKA ZINC-COPPER PROJECT
- Positive assay results from a further 4 diamond holes at Prieska Zinc-Copper Project successfully validate historical
drill data and improve delineation of the mineralisation model by infilling historic intersections in the Deep Sulphide
Target. OCOD046 has intersected 10.65m at 4.19% Zn, 0.80% Cu, 0.15g/t Au and 5.7g/t Ag from 1017m including
5.65m at 6.19% Zn, 1.16% Cu, 0.20g/t Au and 7.5g/t Ag from 1022m.
- OCOD072 intersected 5.35m at 5.14% Zn, 0.72% Cu, 0.22g/t Au and 6.3g/t Ag from 1102m.
- OCOD059_D1 intersected 11.15m at 3.42% Zn, 0.33% Cu, 0.15g/t Au and 9.7g/t Ag from 998m (including 4.32m at
5.08% Zn, 0.31% Cu, 0.22g/t Au and 15.9g/t Ag from 1004.83m), 9.8m at 7.96% Zn, 0.72% Cu, 0.13g/t Au and 5.45g/t
Ag from 1024m and 4.46m at 5.06% Zn, 0.55% Cu, 0.10g/t Au and 8.4g/t Ag from 1041m.
- OCOD062_D1 intersected 2.07m at 5.33% Zn, 0.61% Cu, 0.28% Au and 7.6g/t Ag from 1108.45m.
- Orion’s intensive drill program on the Deep Sulphide Target is on track to deliver a JORC compliant Mineral Resource
estimate Q1 CY18.
Orion Minerals NL (ASX/JSE: ORN) (Orion or Company) is pleased to announce that assay results of drill testing the
Deep Sulphide Target at its Prieska Zinc-Copper (Prieska) Project in South Africa continues to deliver excellent
intersections that infill and validate historic drill and modelled data.
“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 are very encouraged by these new drilling results as they add key information in the area of historical drilling and
access development and in a new area away from historical drilling. The new holes within the historically drilled area are
providing strong validation for the historic results and the extensional results highlight the potential to increase the body of
mineralisation. This, together with strong progress of engineering, environmental studies and the social and labour plan
bodes well for the outcome of the bankable feasibility study currently underway.”
Deep Sulphide Target Summary
Assays have been received for a further four holes drilled with the objective of validating historically defined mineralisation
at the Deep Sulphide Target. The holes are shown on Figures 1 and 2 with results set out below:
- 10.65m at 4.19% Zn, 0.80% Cu, 0.15g/t Au and 5.7g/t Ag from 1017.00m,
including 5.65m at 6.19% Zn, 1.16% Cu, 0.20g/t Au, 7.5g/t Ag from 1022.00m, and
2.30m at 4.14% Zn, 1.04% Cu, 0.33g/t Au and 5.4g/t Ag from 1031.70m (OCOD046);
- 5.35m at 5.14% Zn, 0.72% Cu, 0.22g/t Au and 6.3g/t Ag from 1101.70m (OCOD072);
- 2.07m at 5.33% Zn, 0.61% Cu, 0.28% Au and 7.6g/t Ag from 1108.45m (OCOD062_D1); and
- 11.15m at 3.42% Zn, 0.33% Cu, 0.15g/t Au and 9.7g/t Ag from 998.00m,
including 4.32m at 5.08% Zn, 0.31% Cu, 0.22g/t Au and 15.9g/t Ag from 1004.83m,
9.8m at 7.96% Zn, 0.72% Cu, 0.13g/t Au and 5.45g/t Ag from 1023.60m, and
4.46m at 5.06% Zn, 0.55% Cu, 0.10g/t Au and 8.4g/t Ag from 1040.86m (OCOD059_D1).
OCOD046 intersected mineralisation immediately adjacent to an area where historic mine plans show mineralisation to be
blocked out and accessed with preparatory development, but not stoped prior to the mine closing in 1991. The intersection
of mineralisation in this area represents a key finding as it confirms the limited extent of previous mining, the tenor of
accessed mineralisation in this area (Figure 3) and confirms strong geotechnical conditions.
Drill hole OCOD068 intersected 23m of massive sulphides in the mentioned area. Assay results are awaited however the
intersection again confirms the limits on historic mining and the good geotechnical conditions (Figure 4).
OCOD046 intersected mineralisation 20m away from historic hole F2001 (Figure 3). Both holes intersected two zones of
mineralisation separated by 9.70m and 6.97m respectively.
The correlation between these holes is shown in table 1.
Hole number Distance from Intersection Zn% Cu% Au g/t Ag g/t
OCOD46 (m) length (m)
OCOD046 0 10.65 4.19 0.80 0.15 5.7
OCOD046 0 2.30 4.14 1.04 0.33 5.4
F2001 20 8.47 4.42 0.72 No Assay No Assay
F2001 20 6.39 4.45 0.52 No Assay No Assay
Table 1. Comparison of the intersection made in OCOD046 with adjacent historical hole.
Drill hole OCOD059_D1 was drilled as a deflection from hole OCOD059 and intersected mineralisation 60m from
OCOD059. While the parent hole OCOD059 only intersected two thin zones of mineralisation of 0.68m and 1.00m,
OCOD059_D1 intersected 3 wide zones of high grade mineralisation:
- 11.15m at 3.42% Zn, 0.33% Cu, 0.15g/t Au and 9.7g/t Ag from 998.00m,
including 4.32m at 5.08% Zn, 0.31% Cu, 0.21g/t Au and 15.9g/t Ag from 1004.83m;
- 9.8m at 7.96% Zn, 0.72% Cu, 0.13g/t Au and 5.5g/t Ag from 1023.60m;
- 4.46m at 5.06% Zn, 0.55% Cu, 0.10g/t Au and 8.4g/t Ag from 1040.86m.
More deflections will be drilled from OCOD059 as little drill information exists in the immediate area. Results from these
deflections will be used to define mineralisation in an area south of the main mineralised zone as defined by historical
drilling. The intersection of wide, high grade mineralisation in this area is very encouraging and has the potential to provide
a significant tonnage upside to the bankable feasibility study currently underway.
Drill holes OCOD072 and OCOD062_D1 intersected mineralisation in the south eastern part of the Deep Sulphide target.
OCOD072 intersected 5.35m at 5.14% Zn, 0.72% Cu, 0.22g/t Au and 6.3g/t Ag from 1101.70m. The hole was drilled as an
infill hole and demonstrates the continuity of mineralisation in the south eastern part of the Deep Sulphide target. A
deflection is currently being drilled to continue with the infill drilling process which is verifying historic results for use in
Mineral Resource estimations (as defined in the Australasian Code for Reporting of Exploration Results, Mineral Resources
and Ore Reserves (JORC Code)).
All significant intersections from surface drilling at the Deep Sulphide Target have been released in ASX releases of 19
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 as Appendix 1. All intersections quoted for the Deep Sulphide
Target are length and specific gravity weighted, following the procedure detailed in Appendix 2.
Errol Smart
Managing Director and CEO
5 October 2017
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 Emily Fenton
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
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.
East North From To Length Cu Zn Au Ag
Drill hole
(UTMz34S) (UTMz34S) (m) (m) (m) (%) (%) (g/t) (g/t)
1017.00 1027.65 10.65 0.80 4.19 0.15 5.72
624610 6686251
OCOD046 1031.70 1034.00 2.30 1.04 4.14 0.33 5.4
including 1022.00 1027.65 5.65 1.16 6.19 0.20 7.5
624824 6686282 998.00 1009.15 11.15 0.33 3.42 0.15 9.7
including 1004.83 1009.15 4.32 0.31 5.08 0.22 15.9
OCOD059_D1
1023.60 1033.40 9.80 0.72 7.96 0.13 5.5
1040.86 1045.32 4.46 0.55 5.06 0.10 8.42
OCOD062_D1 625647 6685275 1108.45 1110.52 2.07 0.61 5.33 0.28 7.60
OCOD072 625714 6685217 1101.70 1107.05 5.35 0.72 5.14 0.22 6.28
1. All significant intersections > 1m and >0.3% copper or > 0.5% zinc are quoted.
2. Holes prefixed with OCOD are drilled from surface, those with the prefix OCOU have been drilled from underground.
3. It is recommended that the supporting information contained in Appendix 2 is read in conjunction with these results.
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 - Nature and quality of sampling (e.g. cut channels, random chips, - Diamond core cut at core yard and half core taken as sample.
techniques or specific specialised industry standard measurement tools - Diamond core sampled on 1m intervals where possible, sample
appropriate to the minerals under investigation, such as down lengths adjusted to ensure samples do not cross geological
hole gamma sondes, or handheld XRF instruments, etc.). These boundaries or other features.
examples should not be taken as limiting the broad meaning of - Drilling at the Deep Sulphide Target carried out aiming to define
sampling. an approximate 100m x 100m pattern by use of “mother” holes
- Include reference to measures taken to ensure sample and deflections from these holes.
representivity and the appropriate calibration of any - Drilling at the +105 Level Target carried out aiming to define an
measurement tools or systems used. approximate 45m x 45m pattern.
- Aspects of the determination of mineralisation that are Material - Percussion / reverse circulation pre collars (where used) sampled
to the Public Report. on a composite basis.
- In cases where ‘industry standard’ work has been done this - Mineralised zones are drilled using core drilling.
would be relatively simple (e.g. ‘reverse circulation drilling was - Sampling carried out under supervision using procedures outlined
used to obtain 1 m samples from which 3 kg was pulverised to below including industry standard QA/QC.
produce a 30 g charge for fire assay’). In other cases more - Samples submitted for analysis to ALS is pulverised in its entirety
explanation may be required, such as where there is coarse gold at ALS and split to obtain a 0.2g sample for digestion and
that has inherent sampling problems. Unusual commodities or analysis.
mineralisation types (e.g. submarine nodules) may warrant - Downhole EM survey carried out using standard techniques.
disclosure of detailed information.
Drilling techniques - Drill type (e.g. core, reverse circulation, open-hole hammer, - Diamond core drilling using NQ and BQ sized core.
rotary air blast, auger, Bangka, sonic, etc.) and details (e.g. core - Pre collar drilled using percussion drilling on certain holes (above
diameter, triple or standard tube, depth of diamond tails, face- mineralisation).
sampling bit or other type, whether core is oriented and if so, by
what method, etc.).
Drill sample - Method of recording and assessing core and chip sample - All mineralised intersections are done with core drilling.
recovery recoveries and results assessed. - Core stick-ups reflecting the depth of the drill hole are recorded at
- Measures taken to maximise sample recovery and ensure the 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
- Whether a relationship exists between sample recovery and box at the end of each run.
grade and whether sample bias may have occurred due to - At the core yard, the length of core in the core box is measured for
preferential 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
geotechnically logged to a level of detail to support appropriate inspection of washed drill chips and both full. Core is logged by
Mineral Resource estimation, mining studies and metallurgical geology and recorded between geological contacts by qualified
studies. geologists.
- Whether logging is qualitative or quantitative in nature. Core (or - Qualitative logging of colour, grainsize, weathering, structural
costean, channel, etc.) photography. fabric, lithology, alteration type and sulphide mineralogy carried
- The total length and percentage of the relevant intersections out.
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
sample preparation - If non-core, whether riffled, tube sampled, rotary split, etc. and sampling.
whether sampled wet or dry. - Sampling on site aims to generate a < 2kg sub sample to enable
- For all sample types, the nature, quality and appropriateness of the entire sample to be pulverised without further splitting.
the sample preparation technique. - Water is used in the dust depression proses during percussion
- Quality control procedures adopted for all sub-sampling stages drilling, resulting in wet chip samples.
to maximise representivity of samples. - With core samples, the entire sample length is cut and sampled.
- Measures taken to ensure that the sampling is representative of - Sample preparation is undertaken at ALS Laboratory
the in situ material collected, including for instance results for Johannesburg, an ISO accredited laboratory. ALS utilises industry
field duplicate/second-half sampling. best practise for sample preparation for analysis involving drying
- Whether sample sizes are appropriate to the grain size of the of samples, crushing to <5mm if required and then pulverising so
material being sampled. that +85% of the sample passes 75 microns.
- 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
and laboratory tests laboratory procedures used and whether the technique is Johannesburg. Samples were analysed for base metals using a
considered partial or total. four acid digest and ICP-OES and for gold by fire assay with AAS
- For geophysical tools, spectrometers, handheld XRF finish.
instruments, etc., the parameters used in determining the - External quality assurance of the laboratory assays is monitored
analysis including instrument make and model, reading times, by the insertion of blanks, duplicates and certified reference
calibrations factors applied and their derivation, etc. materials (CRM)
- Nature of quality control procedures adopted (e.g. standards, - Coarse field duplicates consisting of a split sub-sample of the
blanks, duplicates, external laboratory checks) and whether original crushed sample material.
acceptable levels of accuracy (i.e. lack of bias) and precision - Three CRMs are alternated through the sample stream and where
have been established. possible matched to the material being drilled.
- Two blanks are used (pulp and chips).
- 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 - Orion’s executive geologist is personally supervising the drilling
sampling and or alternative company personnel. and sampling along with a team of experienced geologists.
assaying - The use of twinned holes. - The Managing Director and the executive geologist have reviewed
- Documentation of primary data, data entry procedures, data the raw laboratory data and confirmed the calculation of the
verification, data storage (physical and electronic) protocols. significant 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 - Accuracy and quality of surveys used to locate drill holes (collar - Collar data has been laid out using a handheld GPS and these
points and down-hole surveys), trenches, mine workings and other coordinates are reported here.
locations used in Mineral Resource estimation. - All of the Orion drill hole collars are surveyed by a qualified
- Specification of the grid system used. surveyor using a differential GPS which may result in minor
- Quality and adequacy of topographic control. adjustments to 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
distribution - Whether the data spacing and distribution is sufficient to mineralisation on approximately 100m x 100m spacing with infill
establish the degree of geological and grade continuity drilling to be carried out in areas of interest as determined by
appropriate for the Mineral Resource and Ore Reserve results.
estimation procedure(s) and classifications applied. - At the +105 Level Target drill holes aim to intersect mineralisation
- Whether sample compositing has been applied. on approximately 45m x 45m spacing with infill drilling to be
carried out in 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 - Whether the orientation of sampling achieves unbiased sampling - Drilling is oriented perpendicular, or at a maximum achievable
in relation to of possible structures and the extent to which this is known, angle to, the attitude of the mineralisation.
geological structure considering the deposit type. - As a result most holes intersect the mineralisation at an
- If the relationship between the drilling orientation and the acceptable angle.
orientation of key mineralised structures is considered to have - Where surface access or geotechnical conditions do not allow
introduced a sampling bias, this should be assessed and access to optimal drill collar positions, holes may be inclined.
reported if material. - 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 - No audits or reviews have been carried out at this stage.
data.
Section 2 Reporting of Exploration Results
(Criteria listed in the preceding section also apply to this section.)
Criteria JORC Code explanation Commentary
Mineral tenement - Type, reference name/number, location and ownership including - The Prospecting Right is held by a subsidiary company of Agama
and land tenure agreements or material issues with third parties such as joint Exploration and Mining (Pty) Ltd (Agama), which is a wholly
status ventures, partnerships, overriding royalties, native title interests, owned subsidiary of Orion. As such, Orion effectively holds a
historical sites, wilderness or national park and environmental 73.33% interest in the project.
settings. - The Prospecting Right covers a strike of 2200m for the Deep
- The security of the tenure held at the time of reporting along with Sulphide mineralisation out of a total interpreted strike of 2800m.
any known impediments to obtaining a licence to operate in the - The Prospecting Right covers the complete known strike of the
area. +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 horizon 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 - 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 tabulated in Appendix 1.
information for all Material drill holes:
- easting and northing of the drill hole collar
- elevation or RL (Reduced Level – elevation above sea
level in metres) of the drill hole collar
- dip and azimuth of the hole
- down hole length and interception depth
- 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 - Significant Intersections for the Deep Sulphide Target are
methods techniques, maximum and/or minimum grade truncations (e.g. calculated by average of assays result > 0.3% copper or 0.5%
cutting of high grades) and cut-off grades are usually Material zinc and weighted by the sample width and specific gravity of
and should be stated. each sample.
- Where aggregate intercepts incorporate short lengths of high - Significant Intersections for the +105 Level Target are calculated
grade results and longer lengths of low grade results, the by average of assays result > 0.3% copper or 0.5% zinc and
procedure used for such aggregation should be stated and some weighted by the sample width of each sample only.
typical examples of such aggregations should be shown in detail. - In general, the significant intersections correspond strongly to
- The assumptions used for any reporting of metal equivalent geological boundaries (massive sulphides) and are clearly
values 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
mineralisation - If the geometry of the mineralisation with respect to the drill hole angle to the attitude of the mineralisation.
widths and intercept angle is known, its nature should be reported. - The mineralisation has complex geometry and mineralisation
lengths - If it is not known and only the down hole lengths are reported, widths need to be estimated based on interpretation of
there should be a clear statement to this effect (e.g. ‘down hole surrounding intercepts.
length, true width not known’).
Diagrams - Appropriate maps and sections (with scales) and tabulations of - Appropriate diagrams (plan, cross section and long section) are
intercepts should be included for any significant discovery being shown 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 holes 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
and/or widths should be practiced to avoid misleading reporting mineralisation, have been detailed in previous announcements as
of Exploration Results. detailed in the text.
Other substantive - Other exploration data, if meaningful and material, should be - Hardcopy maps are available for a range of other exploration data.
exploration data reported including (but not limited to): geological observations; This includes mine survey plans, geological maps, airborne
geophysical survey results; geochemical survey results; bulk magnetics, ground magnetics, electromagnetics, gravity and
samples – size and method of treatment; metallurgical test induced polarisation. All available exploration data has been
results; bulk density, groundwater, geotechnical and rock viewed by the Competent Person.
characteristics; potential deleterious or contaminating - The mine operated from 1972 to 1991 and is reported to have
substances. 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 - Drilling is ongoing to test the Deep Sulphide Target.
lateral extensions or depth extensions or large-scale step-out - Downhole and surface EM surveys are also in progress aimed at
drilling). delineating targets away from the historically drilled areas.
- Diagrams clearly highlighting the areas of possible extensions,
including the main geological interpretations and future drilling
areas, provided this information is not commercially sensitive.
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