Evolution Mining FY24 Guidance Update
Evolution
MINING
SECTION 1 - SAMPLING TECHNIQUES AND DATA
Cowal Section 2 Reporting of Exploration Results
Criteria
Verification of
sampling and
assaying
Location of
data points
Data spacing
and distribution
Orientation of
data in relation
to geological
structure
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Sample check assays are sent to Umpire laboratories at a ratio of 1:20 samples.
Commentary
The quality control / quality assurance (QAQC) process ensures the intercepts are representative for the GRE46 epithermal low sulphidation gold system. Half core and sample pulps are
retained at Cowal Operations if further verification is required.
The twinning of holes is not a common practice undertaken at Cowal Operations.
Cowal uses DataShed software system to maintain the database. Digital assay results are loaded directly into the database. The software performs verification checks including checking for
missing sample numbers, matching sample numbers, changes in sampling codes, inconsistent "from-to" entries, and missing fields. Results are not entered into the database until the QA/QC
Administrator approves of the results. A QA/QC report is completed for each drill hole and filed with the log, assay sheet, and other appropriate data.
No adjustments or calibrations have been made to the final assay data reported by the laboratory.
All drill hole collars were surveyed using high definition DGPS. All drill holes were surveyed using a downhole survey camera. The first survey reading was taken near the collar to determine
accurate set up and then at regular intervals downhole.
On completion of each angled drill hole, a down hole gyroscopic (Gyro) survey was conducted. The Gyro tool was referenced to the accurate surface surveyed position of each hole collar.
The Gyro results were entered into the drill hole database without conversion or smoothing.
All drill holes at Cowal have been surveyed for easting, northing and reduced level. Recent data is collected and stored in CGO Mine grid.
Topographic control was generated from detailed aerial surveys.
The resource definition drillholes in this report are targeted to test for continuity of mineralisation as interpreted from previous drilling. It is not yet known whether this drilling is testing the full
extent of the mineralised geological zones.
All drilling prior to 2018 is sampled at 1 m intervals down hole. Lithological based sampling was implemented in 2018 with a maximum sample length of 1.3m and a minimum sample length of
0.3m to avoid sampling across geological boundaries.
Diamond holes in this report were positioned to optimise intersection angles of the target area.
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For GRE46 this direction is nominally 300-330
Prior to 2018, the primary drill angle was west to east.
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