Skip to main content

AI assistant

Sign in to chat with this filing

The assistant answers questions, extracts KPIs, and summarises risk factors directly from the filing text.

S2 RESOURCES LTD Regulatory Filings 2016

May 5, 2016

65745_rns_2016-05-05_64011e81-3f62-40c4-9bd3-902c6c398714.pdf

Regulatory Filings

Open in viewer

Opens in your device viewer

ASX Announcement

Friday 6[th] May 2016

==> picture [584 x 107] intentionally omitted <==

84,000 OUNCE GOLD RESOURCE IN NANOOK PALAEOCHANNEL GRAVELS

Highlights

  • Initial Mineral Resource estimate of 2.2Mt @ 1.2g/t for 84,000oz gold in Nanook palaeochannel

  • Gold resource hosted in quartz gravel at base of palaeochannel

  • Source of gold bearing gravel to be investigated with drilling program cofunded by WA Government exploration incentive scheme

  • Located 6 kilometres south along trend from recently announced Monsoon intercept and 10 kilometres south along trend from Baloo deposit

S2 Resources Ltd (“S2” or the “Company”) advises that it has completed the first Mineral Resource estimate for the palaeochannel hosted gold mineralization at the Nanook gold prospect at its 100% owned Polar Bear project in Western Australia.

The gold occurs in quartz gravels occupying the base of a paleochannel. These represent an ancient layer of gravel and rubble that appears to have been at least partly locally derived from an underlying bedrock source, largely located in a broad, northeast trending ancient valley now filled in and concealed by salt lake sediments (see Figure 1). This interpretation is supported by the recent nearby intersection of in-situ high grade gold mineralization in weathered bedrock adjacent to the highest grade part of the palaeochannel and on the same northwest trending geological contact as that beneath the highest grade part of the palaeochannel (see ASX announcement of 3[rd] May 2016 and Figures 1 and 2).

The resource estimation is based on 821 aircore drill holes and 12 reverse circulation (RC) drill holes. All constituent individual sample assays were subject to a top cut of 8g/t gold irrespective of their actual grade in order to ensure that the high grade intercepts in drillholes in the high grade part of the palaeochannel do not influence the overall resource estimate.

North Wing, Level 2, 1 Manning Street, Scarborough WA 6019, Australia PO Box 1059 Scarborough WA 6922, Australia ABN 18 606 128 090 T +61 8 6166 0240 F 61 8 6241 4299 E [email protected] W www.s2resources.com.au

The initial Mineral Resource estimate for the Nanook palaeochannel comprises 2,200,000 tonnes grading 1.2g/t gold for a contained 84,000 ounces of gold at a lower cut-off grade (LCOG) of 0.8g/t gold.

==> picture [443 x 570] intentionally omitted <==

Figure 1. Plan of drilling in the Nanook palaeochannel and outline of Mineral Resource at various lower cut off grades.

==> picture [286 x 139] intentionally omitted <==

==> picture [454 x 306] intentionally omitted <==

Figure 2. Three dimensional view looking northeast along the Nanook palaeochannel, showing the gold resource occupying a broad ancient valley now concealed beneath the salt lake, together with associated nearby bedrock gold intersections.

Table 1 and Figure 3 show the variation in tonnage, grade and contained gold at a variety of lower cutoff grade thresholds. At a lower LCOG of 0.5g/t gold, the resource comprises 5,300,000 tonnes at a grade of 0.9g/t gold for a contained 148,000 ounces of gold, whereas at a higher LCOG of 1.0g/t gold, the resource comprises 1,400,000 tonnes at a grade of 1.4g/t gold for a contained 61,000 ounces of gold.

Inferred
LCOG Tonnes
(000's)
g/t Au Oz Au
0.5 5,300 0.9 148,000
0.8 2,200 1.2 84,000
1.0 1,400 1.4 61,000

Table 1. Nanook Palaeochannel Gold Deposit - Statement of Resources May 2016. All Mineral Resources are reported to JORC 2012 standards. Nanook Mineral Resource reported at 0.8g/t Au LCOG (lower cut‐off grade). All figures are rounded to reflect appropriate levels of confidence. Apparent differences may occur due to rounding.

==> picture [518 x 398] intentionally omitted <==

----- Start of picture text -----

Total Resource Grade Tonnage Curve
2.0 10,000,000
1.8 9,000,000
1.6 8,000,000
1.4 7,000,000
1.2 6,000,000
1.0 5,000,000
0.8 4,000,000
0.6 3,000,000
0.4 2,000,000
0.2 1,000,000
0.0 -
0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6
LCOG g/t Au)
g/t Tonnes
Tonnes
Grage (g/t Au)
----- End of picture text -----

Figure 3. Grade-tonnage curve for the Nanook palaeochannel Mineral Resource. All Mineral Resources are reported to JORC 2012. LCOG is lower cut-off grade.

The Inferred classification is based on good confidence in the geological domain countered by high nugget values, sampling method of 4m composites, variable drill spacing and no direct Dry Bulk Density measurements.

S2 has now defined three gold “hotspots” over a 10 kilometre distance on a single trend at Polar Bear, with a 123,000 oz Indicated and Inferred Mineral Resource at Baloo, an 84,000 oz Inferred Mineral Resource at Nanook, and high grade gold mineralization in drilling at Monsoon in between these two (see Figure 4).

A reverse circulation (RC) drill program to search for the source of this gold is scheduled to start later in May. This drill program will be co-funded by the Government of Western Australia as part of its progressive Exploration Incentive Scheme (EIS).

S2’s Managing Director, Mark Bennett, said “the presence of 84,000 ounces of transported gold in the Nanook palaeochannel is a good result in its own right but the big question is, “where has it come from”? The next step is to find the source of this gold and if so, determine how much of it remains intact. In this sense the palaeochannel resource represents a very big geochemical anomaly”.

==> picture [454 x 582] intentionally omitted <==

Figure 4. Location of Nanook palaeochannel resource relative to the Monsoon prospect and the Baloo deposit

For further information, please contact:

==> picture [286 x 139] intentionally omitted <==

Mark Bennett Anna Neuling Managing Director Executive Director +61 8 6166 0240 +61 8 6166 0240

Competent Persons statement

The information in this report that relates to Exploration Results is based on information compiled by John Bartlett who is an employee of the company. Mr Bartlett is a member of the Australasian Institute of Mining and Metallurgy. Mr Bartlett has sufficient experience of relevance to the style of mineralisation and the types of deposits under consideration, and to the activities undertaken, to qualify as Competent Persons as defined in the 2012 Edition of the Joint Ore Reserves Committee (JORC) Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves. Mr Bartlett consents to the inclusion in this report of the matters based on information in the form and context in which it appears. The information in this report that relates to the Nanook Mineral Resource estimation is based on information compiled by Mr Brian Wolfe, Principal Consultant Geologist – International Resource Solutions Pty Ltd and Mr Andrew Thompson, an employee and shareholder of the Company. Mr Wolfe and Mr Thompson are members of the Australasian Institute of Mining and Metallurgy and have sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration to qualify as a Competent Person as defined in the 2012 Edition of the “Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves” (JORC Code). Mr Wolfe and Mr Thompson consent to the inclusion in this report of the matters based on their information in the form and context in which they appear.

Annexure 1

The following Tables are provided to ensure compliance with the JORC code (2012) edition requirements for the reporting of exploration results.

SECTION 1 SAMPLING TECHNIQUES AND DATA

Criteria JORC Code explanation Commentary
Sampling techniques Nature and quality of sampling (e.g. 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.
The mineralised trend at Nanook is sampled by RC and aircore
drilling on a nominal 40 m hole spacing and 100 m lines, with
local infill to 100m x 20m and 50m x 20m spacing. All holes
drilled to refusal.
For RC sampling, a 1 metre split is taken directly from a cone
splitter mounted beneath the rigs cyclone. The cyclone and
splitter are cleaned regularly to minimise any contamination. A
second reference split is also taken from each metre and stored
on site.
Aircore holes are sampled using an aluminium scoop to produce
a four metre composite sample.
Include reference to measures taken to ensure
sample representivity and the appropriate
calibration of any measurement tools or systems
used
Sampling and QAQC procedures is carried out using S2 protocols
as per industry best practice.
Criteria JORC Code explanation Commentary
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 (e.g. ‘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 (e.g.
submarine nodules) may warrant disclosure of
detailed information
Aircore samples are composited at 4 m to produce a bulk 3 kg
sample. Samples were dried, pulverised (total prep), and split to
produce a 25 g sub sample which is analysed using aqua-regia
digestion with ICP-MS finish with a 1 ppb detection limit. High
grades were repeated using 25g or 50g Lead Collection fire
assay with an ICP/MS finish.
RC drilling is sampled a 1m “cone” split sample, to produce a
bulk 3 kg sample. Sample preparation was the same as for the
aircore drilling. A nominal 50gram sub-sample was collected
and analysed by Samples were to produce a sub sample for
analysed by fire assay with an AA finish.
A 1m end of hole sample was collected for all aircore holes.
Sample preparation was the same as above and were analysed
using a four acid digest with an ICP/OES and fire assay. The
following elements are included in the assay suite: Ag, Al, As,
Au, Ba, Be, Bi, Ca, Cd, Ce, Co, Cr, Cu, Fe, K, La, Mg, Mn, Mo, Na,
Ni, P, Pb, Sb, Sc, Sr, Te, Ti, Tl, V, W, Zn.
Drilling techniques Drill type (e.g. core, reverse circulation, open-hole
hammer, rotary air blast, auger, Bangka, sonic, etc)
and details (e.g. core diameter, triple or standard
tube, depth of diamond tails, face-sampling bit or
other type, whether core is oriented and if so, by
what method, etc).
RC drilling is carried out using a face sampling hammer with a
nominal diameter of 140mm.
Aircore drilling is carried out using a 3 ½ inch blade bit. Where
necessary a 3 ½ inch face sampling hammer is employed to
penetrate through hard zones.
Drill sample recovery Method of recording and assessing core and chip
sample recoveries and results assessed
RC and aircore sample recoveries are visually estimated
qualitatively on a metre basis and are recorded in the database.
Measures taken to maximise sample recovery and
ensure representative nature of the samples
Sample quality is qualitatively logged on a metre basis,
recording sample condition and contamination.
Various drilling additives (including muds and foams) have been
used to condition RC and aircore drill holes to maximise
recoveries and sample quality. Drill cyclone and sample buckets
are cleaned between rod-changes and after each hole to
minimise down hole and/or cross-hole contamination.
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.
Insufficient drilling and geochemical data is available at the
present stage to evaluate potential sample bias.
Aircore drilling samples are occasionally wet which may have
resulted in sample bias due to preferential loss/gain of
fine/coarse material.
The limited RC drilling with 1m sampling through the mineralized
gravels shows a good correlation with the AC results
Logging 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.
Lithology, alteration and veining is recorded directly to a digital
format and imported into S2 Resources central database. The
logging is considered of sufficient standard to support a
geological resource.
Whether logging is qualitative or quantitative in
nature. Core (or costean, channel, etc)
photography.
Logging of aircore and RC records lithology, mineralogy,
mineralisation, weathering, colour and other features of the
samples, and is qualitative in nature.
The total length and percentage of the relevant
intersections logged
All drillholes were logged in full.
Sub-sampling
techniques and
sample preparation
If core, whether cut or sawn and whether quarter,
half or all core taken.
Not applicable.
Criteria JORC Code explanation Commentary
If non-core, whether riffled, tube sampled, rotary
split, etc and whether sampled wet or dry.
Aircore samples consist of a 4 metre composite pled 1 metre
samples are collected via an on-board cone splitter. Samples
were collected both wet and dry.
For all sample types, the nature, quality and
appropriateness of the sample preparation
technique.
The sample preparation follows industry best practice in sample
preparation All samples are pulverised utilising Essa LM1, LM2 or
LM5 grinding mills determined by the size of the sample. Samples
are dried, crushed as required and pulverized to produce a
homogenous representative sub-sample for analysis. A grind
quality target of 85% passing 75μm has been established and is
relative to sample size, type and hardness.
Quality control procedures adopted for all sub-
sampling stages to maximise representivity of
samples.
Quality control procedures include submission of Certified
Reference Materials (CRM’s), blanks and duplicate samples with
each batch of samples. Selected samples are also re-analysed to
confirm anomalous results.
Grind size checks are routinely completed to ensure samples
meet the industry standard of 85% passing through a 75µm
mesh.
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.
Field duplicates are taken at regular intervals. Samples are
selected to weigh less than 3kg to ensure total preparation at the
pulverisation stage.
Whether sample sizes are appropriate to the grain
size of the material being sampled.
Sample sizes are considered appropriate for gold mineralisation.
Quality of assay data
and laboratory tests
The nature, quality and appropriateness of the
assaying and laboratory procedures used and
whether the technique is considered partial or
total.
4m composite samples from AC drilling are analysed for Au only
using a 25g aqua-regia digestion with an ICP/MS finish. The
method gives a near total digestion of the regolith intercepted in
aircore drilling and is suitable for the estimation of palaeochannel
gold deposits. High grades were repeated using 25g or 50g Lead
Collection fire assay with an ICP/MS finish.
All aircore holes have a 1m end-of-hole sample is collected for all
AC holes. An extensive multi-element suite (including Ag, Al, As,
Ba, Be, Bi, Ca, Cd, Ce, Co, Cr, Cu, Fe, K, La, Mg, Mn, Mo, Na, Ni, P,
Pb, Sb, Sc, Sr, Te, Ti, Tl, V, W, Zn) is analysed using a four acid
digest with an ICP/OES and ICP/MS finish. Au, Pt And Pd is
analysed for using 25g or 50g Lead Collection fire assay with an
ICP/MS finish.
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.
No geophysical tools were used to determine any element
concentrations used in this resource estimate.
Nature of quality control procedures adopted (e.g.
standards, blanks, duplicates, external laboratory
checks) and whether acceptable levels of accuracy
(i.e. lack of bias) and precision have been
established.
Sample preparation checks for fineness were carried out by the
laboratory as part of their internal procedures to ensure the grind
size of 85% passing 75 micron was being attained. Laboratory
QAQC involves the use of internal lab standards using certified
reference material, blanks, splits and replicates as part of the in
house procedures.
Verification of
sampling and
assaying
The verification of significant intersections by either
independent or alternative company personnel.
The Exploration Manager of S2 has visually verified significant
intersections.
The use of twinned holes. No twin holes have been drilled on the project to date.
Documentation of primary data, data entry
procedures, data verification, data storage
(physical and electronic) protocols.
Primary data was collected using a set of standard Excel
templates using lookup codes. The information was sent to an
external database consultant for validation and compilation into
a Perth based SQL database.
Criteria JORC Code explanation Commentary
Discuss any adjustment to assay data. No adjustments or calibrations were made to any assay data
reported.
Location of data
points
Accuracy and quality of surveys used to locate
drillholes (collar and down-hole surveys), trenches,
mine workings and other locations used in Mineral
Resource estimation.
Drillhole collars were located GPS with an accuracy is +/- 5m.
Specification of the grid system used. The grid system used at Polar Bear is GDA94 (MGA), zone 51.
Quality and adequacy of topographic control. A topographic surface has been created from aerial geophysical
data, This has been calibrated with DGPS survey data. All
reconnaissance drill holes have been corrected to this surface
where DGPS pickup is not available.
Data spacing and
distribution
Data spacing for reporting of Exploration Results. Data spacing is currently defined by the geological criteria
regarded appropriate to determine the extents of mineralisation.
Reconnaissance AC drilling is on a nominal spacing of between
100m x 40m and 50m x 40m drill pattern.
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.
Drilling is considered to be of sufficient spacing to allow an
inferred mineral resource to be estimated.
Whether sample compositing has been applied. No compositing has been applied to the exploration results.
Orientation of data in
relation to geological
structure
Whether the orientation of sampling achieves
unbiased sampling of possible structures and the
extent to which this is known, considering the
deposit type.
The drilling is not necessarily drilled perpendicular to the
orientation of the intersected mineralisation. All reported
intervals are downhole intervals and not calculated true width.
This will be established with further drilling.
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.
No orientation biased sampling bias has been identified in the
data at this point.
Sample security The measures taken to ensure sample security. Chain of custody is managed by S2 Resources. Samples are
stored on site and either delivered by S2 personnel to Perth and
then to the assay laboratory, or collected from site by Centurion
Transport and delivered direct to the assay laboratory. Whilst in
storage, they are kept on a locked yard. Tracking sheets have
been set up to track the progress of batches of samples.
Audits or reviews The results of any audits or reviews of sampling
techniques and data.
No audits or reviews have been conducted at this stage.

SECTION 2 REPORTING OF EXPLORATION RESULTS

Criteria JORC Code explanation Commentary
Mineral tenement
and land tenure
status
Type, reference name/number, location and
ownership including agreements or material issues
with third parties such as joint ventures,
partnerships, overriding royalties, native title
interests, historical sites, wilderness or national
park and environmental settings.
The Nanook prospect is located within Exploration License
_E63/1142,_which is located within the Polar Bear Project, 100%
owned by Polar Metals Pty Ltd, a wholly owned subsidiary of S2
Resources Ltd.
A very minor portion of the reported Mineral Resource is situated
in E63/1738, which is 80% owned by Polar Metals. The balance is
held by Shumwari Pty L:td as part of the Eundynie Joint Venture.
All projects are situated within the Ngadju Native Title Claim
(WC99/002).
Criteria JORC Code explanation Commentary
The security of the tenure held at the time of
reporting along with any known impediments to
obtaining a licence to operate in the area.
The tenement is in good standing and no known impediments
exist on tenement actively explored.
Exploration done by
other parties
Acknowledgment and appraisal of exploration by
other parties.
Gold Exploration
Plutonic Operations Limited and Homestake Gold of Australia
Limited conducted reconnaissance AC drilling (PBAC prefix) over
Lake Cowan on predominantly 100 m drillhole spacing and 800 m
line spacing from 1997-1999. Location of these drillholes cannot
be verified as the collars are now mostly obscured.
AC sampling was done by 4 m composites with 1 m re-splits on
samples greater than 0.1 g/t. Samples were assayed by aqua-
regia digest with AAS finish although this cannot be verified as
the original laboratory.
Geology Deposit type, geological setting and style of
mineralisation.
The Polar Bear project is situated within the Archaean Norseman-
Wiluna Belt which locally includes basalts, komatiites,
metasediments, and felsic volcanoclastics.
The primary gold mineralisation is related to hydrothermal
activity during multiple deformation events. Indications are that
gold mineralisation is focused on or near to the stratigraphic
boundary between the Killaloe and Buldania Formation.
The mineralisation modelled at Nanook is situated at or close to
the Tertiary / Archaean unconformity, primarily within
unconsolidated quartz rich sands and gravel. The mineralisation
is interpreted to be either elluvial or alluvial in nature, although
a supergene overprint is present.
It may be derived from a nearby basement source. Recent drilling
has defined a number of potential gold trends to the Northwest
associated with sheared mafic and mafic-shale contact as well as
to the southwest in and adjacent to the Nanook granodiorite
body.
Drill hole Information A summary of all information material to the
understanding of the exploration results including
a tabulation of the following 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.
Refer to Annexure1 in body of text.
Data aggregation
methods
In reporting Exploration Results, weighting
averaging techniques, maximum and/or minimum
grade truncations (e.g. cutting of high grades) and
cut-off grades are usually Material and should be
stated.
All reported assays have been length weighted. A nominal 0.2 g/t
Au lower cut-off is used to report AC intersections.
Where aggregate intercepts incorporate short
lengths of high grade results and longer lengths of
low grade results, the procedure used for such
aggregation should be stated and some typical
examples of such aggregations should be shown in
detail.
High grade gold intervals internal to broader zones of
mineralisation are reported as included intervals.
Criteria JORC Code explanation Commentary
The assumptions used for any reporting of metal
equivalent values should be clearly stated.
No metal equivalent values are used for reporting exploration
results.
Relationship between
mineralisation widths
and intercept lengths
These relationships are particularly important in
the reporting of Exploration Results.
If the geometry of the mineralisation with respect
to the drill hole angle is known, its nature should
be reported.
If it is not known and only the down hole lengths
are reported, there should be a clear statement to
this effect (e.g. ‘down hole length, true width not
known’).
The bedrock trend of mineralisation at Nanook is not known at
present due to the lack of deeper drilling and the early stage of
exploration.
Alluvial/elluvial gold has been defined within two discrete
palaeochannel systems trending roughly N-S and NNE.
Downhole thicknesses can be regarded as true thickness due to
the flat orientation of the palaeochannel deposit.
Refer to Annexure 1 and Figures in body of text.
Diagram Appropriate maps and sections (with scales) and
tabulations of intercepts should be included for
any significant discovery being reported These
should include, but not be limited to a plan view of
drill hole collar locations and appropriate sectional
views.
Refer to Figures in body of text.
Balanced reporting Where comprehensive reporting of all Exploration
Results is not practicable, representative reporting
of both low and high grades and/or widths should
be practiced to avoid misleading reporting of
Exploration Results.
The accompanying document is conserved to represent a
balanced report with grades and/or widths reported in a
consistent manner.
Other substantive
exploration data
Other exploration data, if meaningful and material,
should be reported including (but not limited to):
geological observations; geophysical survey results;
geochemical survey results; bulk samples – size
and method of treatment; metallurgical test
results; bulk density, groundwater, geotechnical
and rock characteristics; potential deleterious or
contaminating substances.
No other exploration data collected to date is considered
material or meaningful at this stage.
Further work The nature and scale of planned further work (e.g.
tests for lateral 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
RC follow-up of high grade intercepts to establish the controls
and geometry of mineralization is proposed.

SECTION 3 ESTIMATION AND REPORTING OF MINERAL RESOURCES

Criteria JORC Code explanation Commentary
Database integrity Measures taken to ensure that data has not been
corrupted by, for example, transcription or keying
errors, between its initial collection and its use for
Mineral Resource estimation purposes.
Data templates with lookup tables and fixed formatting are used
for logging, spatial and sampling data. Data transfer is electronic
via e-mail. Sample numbers are unique and pre-numbered bags
are used. These methods all minimise the potential of these
types of errors.
Data validation procedures used. Data validation checks are run by the database management
consultant.
Criteria JORC Code explanation Commentary
Site visits Comment on any site visits undertaken by the
Competent Person and the outcome of those visits.
A site visit was made to the Nanook deposit by Andy Thompson
during AC drilling to verify sampling integrity and recovery. No
issues were encountered. Brian Wolfe has not undertaken a site
visit as of the data of reporting.
If no site visits have been undertaken indicate why
this is the case.
Not applicable
Geological
interpretation
Confidence in (or conversely, the uncertainty of) the
geological interpretation of the mineral deposit.
The confidence in the geological interpretation is considered
good. The deposit is a palaeochannel elluvial / alluvial gold
deposit style typical of the Higginsville area.
Nature of the data used and of any assumptions
made.
Geological logging of the Tertiary sediments and their contact
with Archaean basement has been used to model the channel
fill deposit. The assays data consists of dominantly 4m
composites through the mineralization.
The effect, if any, of alternative interpretations on
Mineral Resource estimation.
The deposit is well constrained and predictable with clear
boundaries which define the mineralised domains. Infill drilling
has supported and refined the model and the current geological
interpretation is thus considered to be robust.
The use of geology in guiding and controlling
Mineral Resource estimation.
Key features are quartz rubble and sands logged at the Tertiary
/ Archaean unconformity.
The factors affecting continuity both of grade and
geology.
Geological continuity is strong in the interpreted horizon at the
current scale of the drilling. Grade continuity appears good but
requires top cutting to reduce the impact of extremely high
local grades. A top cut of 8 g/t was used.
Dimensions The extent and variability of the Mineral Resource
expressed as length (along strike or otherwise),
plan width, and depth below surface to the upper
and lower limits of the Mineral Resource
The Mineral Resource area has overall dimensions of
dimensions of 2700 m (north) by 1100 m (east) with a central
core of 900m (north) by 400m (east). The deposit has
approximately 40m of cover.
Estimation and
modelling techniques
The nature and appropriateness of the estimation
technique(s) applied and key assumptions,
including treatment of extreme grade values,
domaining, interpolation parameters and
maximum distance of extrapolation from data
points. If a computer assisted estimation method
was chosen include a description of computer
software and parameters used.
The Mineral Resource estimate was generated via OK.
Mineralised domain interpretation was completed as described
above and as such does not incorporate a lower cutoff grade. The
interpretation was coded to the drill hole database and 4m
length composites were generated within the mineralisation
boundary. A single omni-directional semi-variogram was
calculated and was input in preparation for kriging of the gold
grade data. Hard boundaries were applied to the kriging. A
horizontally orientated search neighbourhood was applied with
radii of 150m in the horizontal direction and 25m in the vertical
directions respectively. Sample counts for the estimates were set
at a minimum of 8 and a maximum of 12. Any blocks not
estimated in the first estimation pass were estimated in a second
pass with an expanded search neighbourhood to allow the
domains to be fully estimated. Extrapolation of the drillhole
composite data is generally limited to approximately 50m to
100m beyond the edges of the interpreted mineralization
however is commonly constrained by drilling on adjacent
sections. Change of support has not been applied to emulate
selectivity at the mining stage.
The availability of check estimates, previous
estimates and/or mine production records and
whether the Mineral Resource estimate takes
appropriate account of such data.
This is a maiden Mineral Resource for the Nanook
Palaeochannel and no previous mining activity has taken place
in this area.
The assumptions made regarding recovery of by-
products.
No by-products are assumed.
Estimation of deleterious elements or other non-
grade variables of economic significance (e.g.
sulphur for acid mine drainage characterisation).
No other elements have been assayed.
Criteria JORC Code explanation Commentary
In the case of block model interpolation, the block
size in relation to the average sample spacing and
the search employed.
The parent block size within the estimated domain is
25mN x25mE x 4mRL, with sub-celling to 5mE x 5mN x 1.0mRL
for domain volume resolution. The parent block size was chosen
based on mineralised bodies dimension and orientation,
estimation methodology and relates to a drill section spacing of
100m to 50m and an on-section drill spacing of approximately
40m. The search ellipse was horizontally oriented as previously
described.
Search ellipse dimensions were chosen to encompass adjacent
drillholes on sections and adjacent lines of drilling along strike
Any assumptions behind modelling of selective
mining units.
No assumption on selective mining were made.
Any assumptions about correlation between
variables.
Not applicable
Description of how the geological interpretation
was used to control the resource estimates.
The geological model domained the mineralized elluvial
material which is situated at the Tertiary / Archaean boundary.
Discussion of basis for using or not using grade
cutting or capping.
A number of extremely high grade composites have been
identified which are considered true outliers to the data. Given
the relative lack of numbers of very high grade composites and
their potential impact on the grade estimate, these samples
have been cut to 8g/t Au
The process of validation, the checking process
used, the comparison of model data to drillhole
data, and use of reconciliation data if available.
No mining has taken place; therefore no reconciliation data is
available.
Moisture Whether the tonnages are estimated on a dry basis
or with natural moisture, and the method of
determination of the moisture content.
The tonnages are estimated on a dry basis.
Cut-off parameters The basis of the adopted cut-off grade(s) or quality
parameters applied
A 0.8g/t Au cut-off grade was used to report the Mineral
Resources. This cut-off grade is estimated to be the minimum
grade required for economic extraction.
Additional cut-off grades have been reported at 0.5g/t and
1.0g/t Au
Mining factors or
assumptions
Assumptions made regarding possible mining
methods, minimum mining dimensions and internal
(or, if applicable, external) mining dilution. It is
always necessary as part of the process of
determining reasonable prospects for eventual
economic extraction to consider potential mining
methods, but the assumptions made regarding
mining methods and parameters when estimating
Mineral Resources may not always be rigorous.
Where this is the case, this should be reported with
an explanation of the basis of the mining
assumptions made.
No assumptions have been made as to possible mining method
Metallurgical factors
or assumptions
The basis for assumptions or predictions regarding
metallurgical amenability. It is always necessary as
part of the process of determining reasonable
prospects for eventual economic extraction to
consider potential metallurgical methods, but the
assumptions regarding metallurgical treatment
processes and parameters made when reporting
Mineral Resources may not always be rigorous.
Where this is the case, this should be reported with
an explanation of the basis of the metallurgical
assumptions made.
No metallurgical testwork has been performed.
Criteria JORC Code explanation Commentary
Environmental
factors or
assumptions
Assumptions made regarding possible waste and
process residue disposal options. It is always
necessary as part of the process of determining
reasonable prospects for eventual economic
extraction to consider the potential environmental
impacts of the mining and processing operation.
While at this stage the determination of potential
environmental impacts, particularly for a
greenfields project, may not always be well
advanced, the status of early consideration of these
potential environmental impacts should be
reported. Where these aspects have not been
considered this should be reported with an
explanation of the environmental assumptions
made
No assumptions have been made.
Bulk density Whether assumed or determined. If assumed, the
basis for the assumptions. If determined, the
method used, whether wet or dry, the frequency of
the measurements, the nature, size and
representativeness of the samples.
Dry Bulk Densities have been assumed as 1.8 gm/cm3. No direct
measurements have been taken.
The bulk density for bulk material must have been
measured by methods that adequately account for
void spaces (vugs, porosity, etc), moisture and
differences between rock and alteration zones
within the deposit,
Dry Bulk Densities have been estimated as 1.8 gm/cm3. No
direct measurements have been taken.
Discuss assumptions for bulk density estimates
used in the evaluation process of the different
materials.
The bulk density values were assigned as a single value in the
gravels using data accepted as typical for such deposits.
Classification The basis for the classification of the Mineral
Resources into varying confidence categories
The Mineral Resource has been entirely classified as Inferred.
The classification is based on good confidence in the geological
domain countered by high nugget values,sampling method of
4m composites, variable drill spacing and no direct Dry Bulk
Density measurements.
Whether appropriate account has been taken of all
relevant factors (i.e. relative confidence in
tonnage/grade estimations, reliability of input
data, confidence in continuity of geology and metal
values, quality, quantity and distribution of the
data).
The input data is comprehensive in its coverage of the
mineralisation and does not favour or misrepresent in-situ
mineralisation.
The validation of the block model shows good correlation of the
input data to the estimated grades.
Whether the result appropriately reflects the
Competent Person’s view of the deposit.
The Mineral Resource estimate appropriately reflects the view
of the Competent Persons.
Audits or reviews The results of any audits or reviews of Mineral
Resource estimates.
This is the maiden Nanook Palaeochannel gold deposit Mineral
Resource estimate.
Where appropriate a statement of the relative
accuracy and confidence level in the Mineral
Resource estimate using an approach or procedure
deemed appropriate by the Competent Person. For
example, the application of statistical or
geostatistical procedures to quantify the relative
accuracy of the resource within stated confidence
limits, or, if such an approach is not deemed
appropriate, a qualitative discussion of the factors
that could affect the relative accuracy and
confidence of the estimate
The relative accuracy of the Mineral Resource estimate is
reflected in the reporting of the Mineral Resource as per the
guidelines of the 2012 JORC Code.
Criteria JORC Code explanation Commentary
The statement should specify whether it relates to
global or local estimates, and, if local, state the
relevant tonnages, which should be relevant to
technical and economic evaluation. Documentation
should include assumptions made and the
procedures used
The statement relates to global estimates of tonnes and grade.
These statements of relative accuracy and
confidence of the estimate should be compared
with production data, where available
No production data is available.