Evolution Mining FY24 Guidance Update
SECTION 1 - SAMPLING TECHNIQUES AND DATA
Criteria
Cowal Section 2 Reporting of Exploration Results
Commentary
Sampling
techniques
Drilling techni
ques
Drill sample
recovery
Logging
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Holes in this report consist of conventional diamond core drilling.
Collar and down hole surveys were utilised to accurately record final locations. All samples were logged prior to sampling. Diamond core was sampled to lithological, alteration, and
mineralization related contacts. Industry standard sampling, assaying and QA/QC practices were applied to all holes.
Sample preparation was conducted by SGS West Wyalong, OSLS Bendigo and ALS Orange. Sample preparation consisted of:
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Drying in the oven at 105°C; crushing in a jaw crusher;
Fine crushing in a Boyd crusher to 2-3mm; with SGS and ALS rotary splitting a 3kg assay sub-sample if the sample is too large for the LM5 mill, and OSLS rotary splitting a
500g charge;
SGS and ALS Pulverising in the LM5 mill to nominal; 90% passing 75 μm; and
a 50g fire assay charge taken with an atomic absorption (AA) finish for SGS and ALS, and a 500g photon assay charge of fine crushed sample for OSLS.
Multi-element analysis for a sutie of elements including Cu is conducted using Aqua Regia digest with an ICP finish.
The detection limit is 0.01 g/t Au for both fire assay and photon assay. Detection limit for Cu is 1ppm.
Diamond drilling for Resource Definition and Grade Control activities is conducted using diamond drill rigs, the core is extracted using a standard tube and core diameter is NQ2
(50.6mm) in size. Diamond drilling for Exploration is drilled HQ in diameter through the clay/oxide material and NQ through bedrock to end of hole.
Diamond core in this report has been oriented using accepted industry techniques.
Provisions are made in the drilling contract to ensure that hole deviation is minimised, and core sample recovery is maximised. Core recovery is recorded in the database. There are no
significant core loss or sample recovery issues. Core is reoriented and marked up at 1m intervals. Measurements of recovered core are made and reconciled to the driller's depth blocks,
and if necessary, to the driller's rod counts.
Geologists log core for lithology, alteration, structure, and veining. Logging was done directly onto laptop computers via LogChief software which is validated and uploaded directly into
the Datashed database.
Structural measurements are obtained using a core orientation device. Core is rotated into its original orientation, using the Gyro survey data as a guide. Freiberg compasses and
Kenometer Core Orientation tools are used for structural measurements.
Geologists log vein data including vein frequency, vein percentage of interval, vein type, composition, sulphide percentage per metre, visible gold, sulphide type, and comments relative
to each metre logged.
All drill core, once logged, is digitally photographed on a core tray-by-tray basis. The digital image captures all metre marks, the orientation line (BOH) and all geologist's demarcations
on the core.
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