Over 340m of Nickel Sulphide Mineralisation at Luhuma
Released
Released
Announcement PDF
ASX ANNOUNCEMENT/MEDIA RELEASE
6 September 2023
Over 340m of Nickel Sulphide Mineralisation
intersected in fifth hole at Luhuma Central
HIGHLIGHTS
•
Drill hole DDLUHC005 at Luhuma Central intersected:
-
-
Semi-massive and heavily disseminated sulphides over 15.6
m from 408m to 423.6m including thin massive sulphide
veins
Significant medium to coarse-grained sulphides (5 to 7%)
over 327.7m from 80.3m to 408m downhole
•
DDLUHC005 provides validation of the thickening of the
sulphide horizon in a southerly direction
•
DDLUHC005 provides validation of strike extent of the Luhuma
Central mineralisation to over 300m, which remains open both
to the north and south
•
All five drill holes now completed at Luhuma Central have
intersected significant massive and/or semi-massive sulphide
mineralisation
•
Ground EM survey to commence at Luhuma Central prior to
drilling for north and south strike extensions
Adavale Resources Limited (ASX: ADD) (“or the Company”) is pleased
to announce that the fifth drill hole, DDLUHC005 at Luhuma Central has
intersected a 15.6m (downhole) zone of semi-massive and heavily
disseminated nickel sulphides including thin massive sulphide veins
between 408m to 423.6m as well as 327.7m (downhole) of medium to
coarse-grained sulphides.
Improved confirmatory assay results have also been received from ALS
South Africa for the first two Luhuma Central drill holes. Downhole EM
(DHEM) surveys are ongoing together with planned ground
Electromagnetic (EM) surveying at Luhuma Central.
Adavale’s Executive Director, David Riekie, commented:
“A fifth consecutive drill hole with sulphide mineralisation is a great
outcome. What is particularly gratifying is the strike extent being open to
both the North and South and drill testing of this is imminent. Ground EM
will also be used to trace the interpreted mineralisation over the full 11.5km strike extent at Luhuma Central. The Company looks forward to
providing ongoing updates to what is a very exciting phase in the
program”.
ASX: ADD
DIRECTORS & OFFICERS
GRANT PIERCE
CHAIRMAN
DAVID RIEKIE
EXECUTIVE DIRECTOR
JOHN HICKS
DIRECTOR
ALLAN RITCHIE
CHIEF EXECUTIVE OFFICER
LEONARD MATH
CFO & COMPANY SECRETARY
ABOUT ADAVALE
Adavale Resources is an ASX-listed
exploration company targeting
projects in the 'battery materials‘
space. The company is currently
focused on both its 100% owned
Kabanga Jirani Nickel Project and
2 Farm-in ‘Luhuma’ licences
adjacent and along strike from the
world’s largest undeveloped high
grade NiS resource of 58Mt @
2.62% Ni. Adavale is also
progressing exploration on its
100% owned uranium tenements
in South Australia
Technical Summary and interpretation
Drill hole DDLUHC005 is currently being cased in preparation for DHEM surveying while the core is
being cut and prepped for assay.
The DHEM survey team is still on site to ensure a quick turnaround for the DDLUHC005 survey and
the reporting of results.
The sulphide zone intersected in DDLUHC005 between 408m to 423m is dominated by pyrrhotite with
between 1% to 5% pentlandite and minor pyrite and chalcopyrite. Handheld XRF readings returned
results between 1.40% and 2.70% Ni within the massive sulphides and 0.5% to 0.6% Ni in the
disseminated sulphides.
While the Company takes every reasonable measure to ensure the reliability and accuracy of the XRF
devices by regular calibration checks against certified standards and is confident of the reported
values, the readings are point measurements on core or core chips and therefore may not reflect the
assayed grade of the broader sampled interval. Initial assay results expected within 3 to 4 weeks.
Located approximately 90m to the southwest of drill hole DDLUHC004, drill hole DDLUHC005 at
Luhuma Central was collared to test the southward extension of the high quality/late channel EM plate
modelled from the DDLUHC004 DHEM survey data (Figure 4).
Drill hole DDLUHC004 previously intersected a cumulative thickness of massive and semi-massive
sulphides totalling 21.55m (refer to Adavale ASX announcement dated 17 August 2023).
Between 408m and 423m, drill hole DDLUHC005 intersected a zone of semi-massive and heavily
disseminated nickel sulphide mineralisation (Figure 1, 2 and 3).
Figure 1 and 2: Zone of semi-massive and heavily disseminated nickel sulphide mineralisation 408m and 423m in DDLUHC005
Figure 3: Massive sulphide unit from 423.4m to 423.6m DDLUHC005
ASX Announcement
2
Visual estimates of mineral abundance should never be considered a proxy or substitute for laboratory analyses where
concentrations or grades are the factor of principal economic interest. Visual estimates also potentially provide no
information regarding impurities or deleterious physical properties relevant to valuations.
The Company regularly uses a portable hand-held XRF analyser to screen drill core for mineralisation before cutting and
sampling. This allows for some understanding of the distribution of mineralisation prior to sampling to better ensure that the
sampled core is representative of the type and style of mineralisation. Numerous readings are obtained and recorded for
future reference. The hand-held XRF provides confirmation that mineralisation is present however it is not an accurate
determination of the elemental concentration within the sample analysed. Limitations include very small analysis window,
possible inhomogeneous distribution of mineralisation, analytical penetration depth and possible effects from irregular rock
surface. The pXRF readings are subject to confirmation by chemical analysis from an independent laboratory.
This intersection broadly coincided with the modelled depth of the targeted EM plate, in addition to
the overlying 327.7m of medium to coarse-grained disseminated sulphides intercepted between 80.3
and 408m. This provides further validation for the thickening of the sulphide zone to the south and
extends the known strike extent of the Luhuma Central mineralisation to over 300m. The strike
remains open both to the north and south (Figure 4). The dip extents of the moderate to steeply west
dipping Luhuma Central mineralisation requires further investigation. Geophysical modelling (Audiomagnetotelluric anomalies) suggests the mineralisation could extend upwards of 100m over the dip
direction but this needs to be confirmed by additional drilling.
Drilling and DHEM at Luhuma Central has been designed to delineate both the N-S extent of the
mineralisation and possible zones of greater sulphide accumulation. To date, approximately 300m
strike extent has been drill tested and drill holes DDLUHC004 and now DDLUHC005 have intersected
broader cumulative thicknesses of mineralisation in the south compared to the holes located further
to the north (Table 1).
An orientation ground EM survey is about to commence over the currently drilled southern portion of
Luhuma Central to determine if the highly conductive mineralisation intersected there to date can be
better defined and traced more accurately to the north and south.
The EM survey can then be expanded to cover the more northern and southern areas of Luhuma
Central where both existing airborne EM and Audio-magnetotelluric (AMT) surveys have indicated
mineralisation may extend into these areas. The ground EM survey is anticipated to take two weeks
to complete and if successful will determine the extent and location of the next phase of drilling.
Figure 4: Plan view of current and proposed drill hole locations
(yellow dots) at Luhuma Central plus historical holes (red dot
massive sulphides intersected, black dots indicate ultramafic rocks
intersected) together with location of the AMT lines L1 to L3 that
have been surveyed by Adavale. Blue outline reflects the magnetic
low interpreted to be the host mafic-ultramafic intrusion and the red
corridor is the AMT anomaly projected to surface and interpreted as
the mineralised trend. The background Colour image represents
gridded C25 (db/dt) from the NRG Xcite airborne EM survey.
Section line A-B shown in plan view and cross-sections shown in
figure 5.
ASX Announcement
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Figure 5: N-S Long Section A-B showing sulphide intercepts and footwall sediments
Adavale has now successfully completed five diamond drillholes at Luhuma Central, all situated within
Prospecting Licence, PL 23980/2023 (referred to as Luhuma Central). The drilling is part of 5,000m
combined diamond (DD) and reverse circulation (RC) drill program designed to test a series of targets
within the Company’s Kabanga Jirani Nickel Project. The mineralised intercepts to date, including
DDLUHC005 are as follows:
Drillhole ID
Nature of Mineralisation
From (m)
To (m)
Thickness (m)
DDLUHC001
Massive Sulphide
223.35
227.5
4.15
DDLUHC002
Blebby Sulphide
200.7
205.6
4.90
DDLUHC003
Massive Sulphide
261.7
269.25
7.55
DDLUHC004
Semi-Massive Sulphide
250.20
256.42
6.22
DDLUHC004
Massive Sulphide
256.42
257.54
1.12
DDLUHC004
Disseminated Sulphide
286.70
294.20
7.50
DDLUHC004
Alternating interspersed narrow
Semi-massive and Massive
Sulphide
316.26
323.00
6.74
DDLUHC005
5-7% Medium to Coarse-Grained
Disseminated Sulphides
80.3
408
327.7
DDLUHC005
Semi-Massive to heavily
Disseminated Sulphide
408
423.6
15.6
Table 1: Mineralised Intercepts in Drillholes DDLUHC001 to DDLUHC005
ASX Announcement
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ALS (South Africa) Laboratory Assay Results
ALS laboratory results have been received for samples from DDLUHC001 and DDLUHC002 as
shown in Table 2. The 4.13 m massive sulphide intersection achieved by DDLUHC001 from 223.35m
returned a weighted average grade of 1.03% Ni, 0.04% Cu, 0.17% Co and 400ppb combined Pt,
Pd and Au.
Drillhole ID
Nature of Mineralisation
From
(m)
To (m)
Thickness
(m)
Ni %
Pt + Pd
+ Au g/t
Cu %
Co %
DDLUHC001
Massive Sulphide
223.35
227.48
4.13
1.03
0.04
0.14
0.17
DDLUHC001
Semi-Massive Sulphide
249.00
250.00
1
0.63
0.01
0.09
0.02
DDLUHC002
Blebby Sulphide
200.55
205.55
5
0.41
0.19
0.08
0.02
DDLUHC003
Massive Sulphide
261.7
269.25
7.55
pending
pending
pending
pending
DDLUHC004
Semi-Massive
250.20
256.42
6.22
pending
pending
pending
pending
DDLUHC004
Massive Sulphide
256.42
257.54
1.12
pending
pending
pending
pending
DDLUHC004
Disseminated Sulphide
286.70
294.20
7.5
pending
pending
pending
pending
DDLUHC004
Alternating semi and
massive sulphide
316.26
323.00
6.74
pending
pending
pending
pending
LUHD001
Massive Sulphide
255.40
260.85
5.45
0.80
0.15
0.14
LUHD002
Massive Sulphide
233.83
237.76
3.93
0.57
0.10
0.09
LUH006
Massive Sulphide
235.30
244.30
9
1.14
Historical Drillholes
Table 2: Assay Results for Drillholes in section (DDLUHC001 and DDLUHC002 have current assay results from ALS laboratory,
LUHD001, LUHD002 and LUH006 have historically reported assay values)
Drillholes completed to date at Luhuma Central are tabulated below.
Drillhole ID
DDLUHC001
DDLUHC002
DDLUHC003
DDLUHC004
DDLUHC005
DDKNE015A
Easting
261206
261267
261182
261149
261084
258928
Northing
9711222
9711177
9711297
9711143
9711110
9706530
Elevation
1508
1513
1515
1522
1512
1495
Azimuth
120
120
115
120
130
283.5
Dip
-60
-60
-60
-65
-60
-60
Length (m)
300.9
451.3
361.3
386.0
501.1
552.3
HEM 2
Drillhole DDKNE015A at the EM target named HEM2, located SW of Luhuma, tested the eastern side
of an intrusion where the contact with the sediments coincided with an AMT anomaly. This drill hole
was completed to a depth of 552.3m and cased for DHEM. No significant sulphide mineralisation was
observed in the hole.
ASX Announcement
5
Next Steps
The Company currently has two drill rigs operating within the Luhuma trend - one diamond rig has
been focused on Luhuma Central testing for both depth and strike extensions of the massive nickel
sulphide mineralisation. The second, a multipurpose rig has just completed and cased a deeper
priority diamond hole at HEM2. This rig has now been re-configured to RC and will begin a series of
RC holes designed to test several coincident gravity and EM geochemical anomalies at HEM4.
Included in the upcoming newsflow will be:
•
•
•
•
•
Visual interpretation from drilling planned holes at LUHC and (HEM2E), as appropriate;
ALS assay results;
Downhole EM results;
Ground EM survey results; and
DD drilling and RC drilling at HEM2 E and HEM4.
This announcement is authorised for release by the Board of Adavale Resources Limited..
Further information:
David Riekie
Executive Director
E: investor@adavaleresources.com
For broker and media enquiries:
Andrew Rowell
White Noise Communications
E: andrew@whitenoisecomms.com
P: +61 400 466 226
References/ Previous ASX Releases
See ASX:ADD release on 22 May 2023 titled “ Geologically Significant Nickel Sulphide Licence Granted”.
1
2
Evans, D. M., Hunt, J. P. P. M. and Simmonds, J. R., 2016. An overview of nickel mineralisation in Africa with emphasis on the
Mesoproterozoic East African Nickel belt (EANB). Episodes, 39/2, 319-333. DOI: 10.18814/epiiugs/2016/v39i2/95780; see also ASX:ADD
release 16 December 2021 “Adavale Discovers Significant Mafic-Ultramafic Intrusion”.
See ASX:ADD release on 4 April 2023 titled “Nickel Sulphide Drill Targets and 15km Soil Anomaly Defined”.
3
See ASX:ADD release on 6 June 2023 titled “ Massive Nickel Sulphides Intersected at Kabanga Jirani”.
4
See ASX:ADD release on 19 June 2023 titled “ADD Continue to Intersect Zone of Strong Nickel Sulphides”.
5
See ASX:ADD release on 11 July 2023 titled “Assays confirm Massive Nickel Sulphides at Luhuma Central Prospect”.
6
See ASX:ADD release on 25 July 2023 titled “ADD Replicates Maiden Massive Nickel Sulphide Intersection”.
7
See ASX:ADD release on 4 August 2023 titled “DHEM Delivers Massive Sulphides Extensions”.
8
See ASX ADD release on 17 August titled “Multiple Massive and Semi Massive Nickel Sulphide Zones Intersected at Luhuma Central”
9
Competent Persons Statement
The information in this release that relates to “exploration results” for the Project is based on information compiled or reviewed by Mr David
Dodd of MSA, South Africa. Mr Dodd is a consultant for Adavale Resources Limited and is a member of the SACNASP. Mr Dodd has
sufficient experience that is relevant to the style of mineralisation and type of deposits under consideration as well as to the activity that is
being undertaken to qualify as a Competent Person under the ASX Listing Rules. Mr Dodd consents to this release in the form and context
in which it appears.
Cautionary Statements
Visual estimates of mineral abundance should never be considered a proxy or substitute for laboratory analyses where concentrations or
grades are the factor of principal economic interest. Visual estimates also potentially provide no information regarding impurities or
deleterious physical properties relevant to valuations.
The Company regularly uses a portable hand-held XRF analyser to screen drill core for mineralisation before cutting and sampling. This
allows for some understanding of the distribution of mineralisation prior to sampling to better ensure that the sampled core is representative
of the type and style of mineralisation. Numerous readings are obtained and recorded for future reference. The hand-held XRF provides
confirmation that mineralisation is present however it is not an accurate determination of the elemental concentration within the sample
analysed. Limitations include very small analysis window, possible inhomogeneous distribution of mineralisation, analytical penetration
depth and possible effects from irregular rock surface. The pXRF readings are subject to confirmation by chemical analysis from an
independent laboratory.
ASX Announcement
6
Forward looking statements
This document contains forward-looking statements concerning Adavale. Forward-looking statements are not statements of historical fact
and actual events and results may differ materially from those described in the forward-looking statements as a result of a variety of risks,
uncertainties and other factors. Forward-looking statements are inherently subject to business, economic, competitive, political and social
uncertainties and contingencies. Many factors could cause the Company’s actual results to differ materially from those expressed or implied
in any forward-looking information provided by the Company, or on behalf of the Company. Such factors include, among other things, risks
relating to additional funding requirements, metal prices, exploration, development and operating risks, competition, production risks,
regulatory restrictions, including environmental regulation and liability and potential title disputes. Forward looking statements in this
document are based on Adavale’s beliefs, opinions and estimates of Adavale as of the dates the forward-looking statements are made, and
no obligation is assumed to update forward looking statements if these beliefs, opinions and estimates should change or to reflect other
future developments. Although management believes that the assumptions made by the Company and the expectations represented by
such information are reasonable, there can be no assurance that the forward-looking information will prove to be accurate. Forward-looking
information involves known and unknown risks, uncertainties, and other factors which may cause the actual results, performance or
achievements of the Company to be materially different from any anticipated future results, performance or achievements expressed or
implied by such forward-looking information. Such factors include, among others, the actual market price of nickel, the actual results of
future exploration, changes in project parameters as plans continue to be evaluated, as well as those factors disclosed in the Company's
publicly filed documents. Readers should not place undue reliance on forward-looking information. The Company does not undertake to
update any forward-looking information, except in accordance with applicable securities laws. No representation, warranty or undertaking,
express or implied, is given or made by the Company that the occurrence of the events expressed or implied in any forward- looking
statements in this document will actually occur.
ABOUT ADAVALE
Adavale Resources Limited (ASX:ADD) is a nickel sulphide exploration company that holds 100% of the Kabanga Jirani Nickel Project, a
portfolio of 12 highly prospective granted licences covering ~1,216km2 along the Karagwe-Ankolean belt in Tanzania. The six southernmost
licences are proximal to the world-class Kabanga Nickel Deposit (58Mt @ 2.62% Ni). Adavale has farmed-in to two more highly prospective
licences contiguous to our seven southernmost licences, adding a further 99km2 to the portfolio 1,315sq km). Adavale’s licences were
selected based on their strong geochemical and geophysical signatures from the previous exploration undertaken by BHP.
Adavale also holds exploration licences for their sedimentary uranium potential within the northern part of the highly prospective Lake
Frome Embayment in South Australia.
ASX Announcement
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Appendix 1
Adavale Resources Limited – Reverse Circulation and Diamond
Drilling Program - Kabanga Jirani Nickel Project
JORC Code Edition 2012: Table 1
Section 1: Sampling Techniques and Data
(Criteria in this section apply to all succeeding sections.)
Criteria
JORC Code Explanation
Commentary
Sampling
techniques
•
RC drilling is conducted primarily to identify the
presence of mafic/ultramafic intrusions or to precollar ahead of converting to diamond drilling. RC
chips that are identified as mafic or ultramafic are
initially analysed with a pXRF, but representative
samples are also submitted to ALS (South Africa) for
analyses by ICP MS.
•
•
Nature and quality of sampling
(eg cut channels, random chips,
or specific specialised industry
standard measurement tools
appropriate to the minerals
under investigation, such as
down hole gamma sondes, or
handheld XRF instruments, etc).
These examples should not be
taken as limiting the broad
meaning of sampling.
Include reference to measures
taken to ensure sample
representivity and the
appropriate calibration of any
measurement tools or systems
used.
Aspects of the determination of
mineralisation that are Material
to the Public Report. In cases
where ‘industry standard’ work
has been done this would be
relatively simple (eg ‘reverse
circulation drilling was used to
obtain 1 m samples from which
3 kg was pulverised to produce
a 30 g charge for fire assay’). In
other cases more explanation
may be required, such as where
there is coarse gold that has
inherent sampling problems.
Unusual commodities or
mineralisation types (eg
submarine nodules) may
warrant disclosure of detailed
information.
For RC analyses sampling is not representative of
the broader geological horizons and simply
represents values derived from select points. The
pXRF has been calibrated using the AMIS standards
AMIS0315, AMIS0317, AMIS0319, AMIS0329,
AMIS384 and AMIS0367. Standards used to verify
quality of results measured include AMIS0317 and
AMIS0315.
If mineralisation is intercepted with RC drilling than
RC material will be captured for every metre drilled.
The material is put through a riffler and one third is
taken for further analyses where it is sieved to
remove the chips which are stored in a chip tray.
Both the fines and the chips are logged and
analysed using the pXRF to record Ni values. MgO
values are also noted for each lithological interval.
Any mineralised fines will be submitted for analyses
using aqua regia digest.
All sampling equipment must be cleaned between
samples to prevent contamination.
SG is calculated at site using a pycnometer and
measurements are taken systematically down the
drillhole. This is used to reconcile intercepted
lithologies against the modelled gravity anomalies to
verify that the causative source has been
intercepted.
For diamond drilling sampling takes place as follows:
Core is aligned and a cutting line is drawn to prevent
sampling bias.
Samples are marked off in pre-defined intervals of 1
m or smaller if required to honour lithological
contacts.
The core is split along the china marker reference
line. The sampling depth and sample ID are then
transferred onto the half core remaining so that the
core can be revisited and act as a reference.
ASX Announcement
8
Criteria
JORC Code Explanation
Commentary
The remaining sampled half of the core is then
submitted to an accredited laboratory (ALS South
Africa) along with QAQC samples which will form
15% of all samples submitted and will include
certified blanks and Ni standards.
Drilling
techniques
•
Drill type (eg core, reverse
circulation, open-hole hammer,
rotary air blast, auger, Bangka,
sonic, etc) and details (eg core
diameter, triple or standard tube,
depth of diamond tails, facesampling bit or other type,
whether core is oriented and if
so, by what method, etc).
Combination of RC and diamond drilling using NQ
sized core. Current depth limit of RC drilling is 150m
and for diamond drilling is 600m.
Drill sample
recovery
•
Method of recording and
assessing core and chip sample
recoveries and results
assessed.
For RC Drilling
Logging
•
Measures taken to maximise
sample recovery and ensure
representative nature of the
samples.
•
Whether a relationship exists
between sample recovery and
grade and whether sample bias
may have occurred due to
preferential loss/gain of
fine/coarse material.
•
•
Sub-sampling
techniques and
sample
preparation
Whether logging is qualitative or
quantitative in nature. Core (or
costean, channel, etc)
photography.
•
The total length and percentage
of the relevant intersections
logged.
•
If core, whether cut or sawn and
whether quarter, half or all core
taken.
•
If non-core, whether riffled, tube
sampled, rotary split, etc and
whether sampled wet or dry.
•
ASX Announcement
Whether core and chip samples
have been geologically and
geotechnically logged to a level
of detail to support appropriate
Mineral Resource estimation,
mining studies and metallurgical
studies.
For all sample types, the nature,
quality and appropriateness of
Bulk sample retrieved from the cyclone, sample is
put through the riffler and 2 to 3 kg sample retrieved
for analyses (if required). Chips from this sample are
extracted by washing some of the sample material –
these chips are placed in a chip tray in order to keep
a record of lithologies for each metre drilled. The
riffler is cleaned with compressed air between
sample collection to prevent contamination.
For Diamond Drilling
RQD measurements are taken of core to record
recovery. Nature of mineralisation is not nuggety and
prone to strong variations in grade that correlate to
core loss or loss of fines. Sample length may be
compromised when drilling through massive
sulphides where core loss is often prevalent.
The following is recorded for each interval in the
lithology log: Borehole ID, From and to depths,
lithology code, weathering, colour, grain size, rock
texture and contact type and angle
The following is recorded for each mineralized
interval in the mineralisation log: borehole ID, from
and to depths, mineralisation type, mineralisation
style and mineralisation abundance (usually as a
sulphide percentage)
Chips from RC drilling are stored in a chip tray with
a representative sample captured for every metre.
Drill core has been cut in half with half core
remaining in the core tray and the other half
submitted to the laboratory. Where the lithology is
uniform samples are taken at 1 m intervals otherwise
sample lengths are dictated by geological contacts.
RC material has been captured for every metre
drilled. For details of sampling technique see
“Sampling techniques” section.
9
Criteria
JORC Code Explanation
Commentary
the sample preparation
technique.
Quality of
assay data and
laboratory tests
Verification of
sampling and
assaying
Location of
data points
ASX Announcement
•
Quality control procedures
adopted for all sub-sampling
stages to maximise
representivity of samples.
•
Measures taken to ensure that
the sampling is representative of
the in-situ material collected,
including for instance results for
field duplicate/second-half
sampling.
•
Whether sample sizes are
appropriate to the grain size of
the material being sampled.
•
The nature, quality and
appropriateness of the assaying
and laboratory procedures used
and whether the technique is
considered partial or total.
•
For geophysical tools,
spectrometers, handheld XRF
instruments, etc, the parameters
used in determining the analysis
including instrument make and
model, reading times,
calibrations factors applied and
their derivation, etc.
•
Nature of quality control
procedures adopted (eg
standards, blanks, duplicates,
external laboratory checks) and
whether acceptable levels of
accuracy (i.e. lack of bias) and
precision have been
established.
•
The verification of significant
intersections by either
independent or alternative
company personnel.
•
The use of twinned holes.
•
Documentation of primary data,
data entry procedures, data
verification, data storage
(physical and electronic)
protocols.
•
Discuss any adjustment to
assay data.
•
Accuracy and quality of surveys
used to locate drill holes (collar
and down-hole surveys),
trenches, mine workings and
Core samples will be analysed by ALS laboratory in
South Africa. An aqua regia digest will be used to
avoid the inclusion of silicate Ni. CRM’s, blanks and
standard will be inserted to verify laboratory
accuracy, precision or bias. QAQC samples will form
15% of all samples submitted. In some instances a
four acid digest will also be used and some samples
may be analysed by SGS in Tanzania.
Chips from RC drilling are stored in a chip tray with
a representative sample captured for every metre to
enable check sampling to be undertaken.
All logging and pXRF readings have been
undertaken by a senior exploration personnel.
Primary data was collected in the core shed using a
set of standard logging templates and entered into a
tablet with tailor made dropdown menus. The data is
forwarded to their independent data management
consultant (MSA) for validation and loading into the
company’s drilling database
The drillhole collars were surveyed with a handheld
GPS unit with an accuracy of 5m which is considered
sufficiently accurate for the purpose of the drillhole.
All co- ordinates are expressed in Arc1960.
10
Criteria
JORC Code Explanation
Commentary
other locations used in Mineral
Resource estimation.
•
Specification of the grid system
used.
•
Quality and adequacy of
topographic control.
•
Data spacing for reporting of
Exploration Results.
•
Whether the data spacing and
distribution is sufficient to
establish the degree of
geological and grade continuity
appropriate for the Mineral
Resource and Ore Reserve
estimation procedure(s) and
classifications applied.
•
Whether sample compositing
has been applied.
•
Whether the orientation of
sampling achieves unbiased
sampling of possible structures
and the extent to which this is
known, considering the deposit
type.
•
If the relationship between the
drilling orientation and the
orientation of key mineralised
structures is considered to have
introduced a sampling bias, this
should be assessed and
reported if material.
Sample
security
•
The measures taken to ensure
sample security.
Samples are kept in the core shed and then
delivered in person by the geologist to the courier
company from where they are dispatched to the
laboratory.
Audits or
reviews
•
The results of any audits or
reviews of sampling techniques
and data.
Internal audits/reviews of procedures are ongoing,
however no external reviews have been undertaken.
Data spacing
and distribution
Orientation of
data in relation
to geological
structure
ASX Announcement
No regular drill hole spacing has been set with
individual holes design to
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