Axiom 2014 Annual Report - page 22

20
Axiom Mining Limited
Criteria
JORC Code explanation
Commentary
Sub-sampling
techniques and
sample preparation
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.
For all sample types, the nature, quality and appropriateness
of the sample preparation technique.
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.
ISABEL NICKEL PROJECT
All sample reduction protocols were
by standard laboratory techniques.
Whole HQ triple tube core was delivered
to the sample prep laboratory and
followed the sample reduction protocol.
A range of OREAS nickel laterite
standards were inserted into the suite
of core samples every tenth sample
submitted. Laboratory standards and
blanks were inserted every 50 samples
submitted plus repeats were completed
every 50 samples.
WEST GUADALCANAL PROJECT
Half core sawn samples are taken on
intervals decided on by the logging
geologist. These are generally around
0.5m–1.5m long.
Field duplicates comprising 4% of total
batch taken for all trench and soil
sampling. Additional field duplicates
taken from zones of mineralisation in
trenching that are identified through
trench mapping.
Samples are dried, crushed and
pulverised to 75microns.
No tests have been undertaken to
determine the grain size of gold.
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.
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 (ie lack of bias) and precision
have been established.
ISABEL NICKEL PROJECT
Intertek and ALS standard laboratory
techniques were undertaken.
All core trays and/or sample bags were
dried at 60–90 degrees for 48 hours and
then weighed to test for dry bulk density.
Standard reduction techniques were:
––
jaw crusher
––
pulveriser
––
reducer
––
splitters to reduce sample to 200g.
Ore grade analysis by XRF fusion method.
Trace element analysis completed by
3 acid digest and ICP.
WEST GUADALCANAL PROJECT
Fire assay is appropriate for the nature
of the gold mineralisation being assayed.
Use of certified reference material (CRM)
comprising about 8% of each sample
batch is considered acceptable to assure
levels of accuracy.
Duplicate sampling comprising about
4% of each sample batch is acceptable
to assure levels of assay precision.
With drill samples, a certified reference
material sample and blank sample are
inserted randomly in every 25 samples.
Certified reference material and blanks
are vital to sampling quality assurance
and quality control (QA-QC) by assisting
in the assessment of the assay lab’s bias,
accuracy and precision.
Sampling Techniques and Data
continued
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