Sampling
techniques
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· 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.
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· A total of 2 historical diamond drillholes (M343281R325 and
M343281R326) (236,8m) at Paltamo P1 were re-assayed.
· When drilled by GTK, the drill core was placed in order in
wooden trays, with depth marker blocks at the drilling
location.
· All samples retrieved are from diamond drill cores that have
been cut longitudinally in half according to lithological and
mineralisation intervals and prepared for assaying. The samples are
predominantly 1-2 m in length.
· All samples were submitted to ALS-Geochemistry Oy in Outokumpu
Finland for assaying.
· A prepared sample (0.25 g) was digested with perchloric,
nitric, hydrofluoric, and hydrochloric acids. The residue was
leached with dilute hydrochloric acid and diluted to volume. The
resulting solution was analysed by a combination of inductively
coupled plasma-atomic emission spectrometry (ICP-AES) and
inductively coupled plasma-mass spectrometry with results corrected
for spectral or isotopic interferences.
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Drilling
techniques
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· 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, face-sampling bit or other type, whether
core is oriented and if so, by what method, etc).
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· All drilling was made by diamond drilling, angled holes was
planned and drilled. All the cores are drilled as NQ2 (core 50.7 mm
diameter).
· Orientation markings on every core run.
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Drill sample
recovery
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· Method of recording and
assessing core and chip sample recoveries and results
assessed.
· 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.
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Logging
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· 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.
· Whether logging is
qualitative or quantitative in nature. Core (or costean, channel,
etc) photography.
· The total length and
percentage of the relevant intersections logged.
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· Drill core is logged is detail for lithology, alteration,
mineralisation, geological structure, by geologists, utilising
standardised logging codes and data sheets as supervised by the
senior geologist.
· Logging was both quantitative and qualitative in nature. All
core is photographed in the core boxes to show the core box number,
core run markers and a scale.
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Sub-sampling techniques and
sample preparation
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· 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.
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· Full core was split longitudinally using a rock diamond saw to
create half-core samples that were taken at typically 1-2 m
intervals or to rock contacts if present in the core run for both
mineralisation and
wall rock. The drill core was rotated prior to cutting to maximise
structure to core axis of the cut core.
· Half core was taken for sampling for assaying, and one half
remains in the core box as reference material.
· Core samples were prepared according to industry best
practice, with initial geological control of the half core,
followed by crushing and grinding at the laboratory sample
preparation facility that is routinely managed for contamination
and cleanliness control. Sampling practice is considered as
appropriate for Mineral Resource Estimation.
· Blanks, duplicates and certified reference materials were
inserted into the sample stream at a rate of 1 blank and standard
for every 20 samples.
· Sample sizes are considered appropriate to the grain size of
the rocks and style of mineralisation being sampled.
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Quality of assay data and
laboratory tests
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· 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.
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· Assaying for Ni, Cu, Co and Zn was conducted by
ALS-laboratories
· Each sample was geochemically analysed for the following suite of
elements: Ag, Al, As, Ba, Be, Bi, Ca, Cd, Ce, Co, Cr, Cs, Cu, Fe,
Ga, Ge, Hf, In, K, La, Li, Mg, Mn, Mo, Na, Nb, Ni, P, Pb, Rb, Re,
S, Sb, Sc, Se, Sn, Sr, Ta, Te, Th, Ti, Tl, U, V, W, Y, Zn,
Zr.
· A variety of AMIS CRMs have been used for quality control
purposes for all assaying methods. In addition, blanks and pulp
duplicates have been assayed to assess the accuracy, repeatability,
consistency of analytical methods and machines and for sample
contamination.
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Verification of sampling and
assaying
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· 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.
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· Significant intersections were verified by a number of company
personnel within the management structure of the Exploration team.
Intersections were defined by the exploration geologists, and
subsequently verified by the Exploration Manager.
· Metals One Finland uses Leapfrog GEO and Imago software for
data entry, verification, quality control, logging data and core
photography. The data is stored on the cloud and is also saved and
stored in MS Excel and MS Access software on Metals One Finland´s
internal data drives as a backup and for use in geological
modelling software.
· Data entry is supervised by a data manager, and verification
and checking procedures are in place. The format of the data is
appropriate for use in resource estimation
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Location of data
points
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· Accuracy and quality of
surveys used to locate drill holes (collar and down-hole surveys),
trenches, mine workings and other locations used in Mineral
Resource estimation.
· Specification of the grid
system used.
· Quality and adequacy of
topographic control.
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· Drillhole collars were laid out using handheld global
positioning system (GPS). The rigs were aligned with survey
control, or by compass.
· A gyroscopic survey instrument was utilised during the course
of the Paltamo P1 surface drill programs.
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Data spacing and
distribution
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· 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.
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· Average drillhole density at the P1, has a nominal spacing of
150-
· 200 m x 100 m.
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Orientation of data in
relation to geological structure
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· 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.
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· Diamond drillholes were oriented, wherever possible,
perpendicular to the mineralised structures.
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Sample
security
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· The measures taken to ensure
sample security.
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· The drilling site is supervised by a Supervising Geologist,
the drill core is placed into wooden core boxes that are sized
specifically for the drill core diameter. A wooden lid is fixed to
the box to ensure no spillage. Core box number, drill hole number
and from/to meters are written on both the box and the lid. The
core is then transported to the core storage area and logging
facility, where it is received and logged into a data sheet. Core
logging, and sampling takes place at the secure core management
area. The core samples are marked with labels both in and on the
core boxes, and data recorded on a sample sheet. The samples are
transferred to the laboratory where they are registered as
received, for laboratory sample preparation works and assaying.
Hence, a chain of custody procedure has been followed from core
collection to assaying and storage of pulp/remnant sample
material
· All samples received at the core facility are logged and
registered on a certificate sheet. The certificate sheet is signed
by core facility supervisor (responsible person). All core is
photographed, geotechnical logging, geological logging, sample
interval determination, bulk density testing, and sample
preparation.
· For external assaying, Metals One Finland Oy utilises
ALS-Geochemistry Oy in Outokumpu, Finland.
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Audits or
reviews
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· The results of any audits or
reviews of sampling techniques and data.
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· Ther have been no audits of drilling sampling techniques and
data.
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