New Mineralisation Widths Found at Ernest Henry Mine

New drillholes as part of the ongoing Ernest Henry exploration program have intersected significant mineralisation widths below and within the Pre-Feasibility Study (PFS) mine life extension area.

They include:

  • 118.1m (60m etw) grading 0.79g/t gold and 1.15% copper (EH1226_EXT_D7)
  • 20.4m (17.9m etw) grading 1.69g/t gold and 2.16% copper (EH1226_EXT_D5)

Results confirm that strong mineralisation exists below the PFS area, indicating significant potential for mining beyond the current study. As a result, a decision has been made to extend the PFS to incorporate the larger footprint in determining the optimal location of infrastructure with this work expected to be completed in the June quarter.

Continuity of mineralisation within the PFS extension area has been confirmed with the first two drillholes (out of eight planned holes) intersecting mineralisation outside the current interpretation.

Evolution has met the earn-in expenditure to acquire a 75% interest in the Cue Joint Venture.

Commenting on the drill results, Evolution Mining Limited’s Chief Executive Officer and Managing Director, Lawrie Conway, said:

“We are excited to see continued drilling success at Ernest Henry, confirming its status as a world class asset with strong potential for future mine life extension. Further to the drill results we released in November 2022, we continue to see outstanding copper-gold grades and widths in the new drilling results, which supports the Mine Extension PFS and demonstrates significant potential for a larger mine footprint and Mineral Resource. The PFS will be continued for another few months to incorporate the full benefits of the larger mine footprint to optimise design and location of infrastructure.”

The latest surface drillholes targeting depth extensions to interpreted mineralisation below the Pre-Feasibility Study (PFS) area have confirmed the mineralisation widths seen in previously reported hole EH1226_EXT_D61 and have also defined the top of the mineralised zone. Complementary to this, resource definition drilling within the PFS area has confirmed both up-plunge and down-plunge extensions to interpreted mineralisation.

North-South section looking west of the Ernest Henry mineralisation. Latest drillhole traces are shown in red

Assay results from EH1226_EXT_D7 have been returned, confirming significant mineralisation widths observed in EH1226_EXT_D6. Encouragingly, these intersections lie outside the current mineralisation interpretation and below the PFS area. Whilst the copper and gold grades in EH1226_EXT_D7 are not as strong as those in EH1226_EXT_D6, the width of mineralisation intersected in this drillhole increases the likelihood that mineralisation continues well below at depth. EH1226_EXT_D7 has returned 118.1m (60m etw) grading 0.79g/t gold and 1.15% copper. Assay results for EH1226_EXT_D5 were also returned in December, which intersected the top of the same mineralised zone intersected in EH1226_EXT_D6. EH1226_EXT_D5 intersected 20.4m (17.9m etw) grading 1.69 g/t gold and 2.16% copper.

Section 38,170mN (+/-50m) looking north showing the mineralisation intersected in EH1226_EXT_D7, which lies 80m below in EH1226_EXT_D6. EH1226_EXT_D5 intersected the top of the mineralised zone

The first two drillholes designed to test the up and down-plunge continuity of mineralisation have been completed with samples dispatched and awaiting assay. Geological observations from these drillholes (EH1312 and EH1314) confirm extension of mineralisation up-plunge (from EH1226_EXT_D6 and EH1226_EXT_D7) and down-plunge extensions from Ernie Junior (Figure 3). The volume of mineralisation within the PFS area will likely increase as a result of these intersections, with a further six drillholes yet to be completed.

Evolution has satisfied the earn in requirement under the Earn-in and Exploration Joint Venture (Cue JV) with Musgrave Minerals Ltd (ASX:MGV) to earn a 75% interest in the Cue JV. Diamond drilling at Cue during the quarter continued to confirm that the geology and structure of the West Island prospect is characterised by multiple, stacked narrow high-grade intercepts within a broader lower grade envelope along the 1.6km mineralised trend. Key drilling highlights from Cue are presented below.

  • 5.50m (3.85m etw) grading 4.16g/t gold from 349.5m (22CUDD019A)
  • 11.49m (8.04m etw) grading 8.71g/t gold from 235.51m (22CUDD021)-Including 1.00m (0.70 etw) at 66.00g/t gold from 238m
  • 7.00m (4.90m etw) grading 5.16g/t gold from 393m (22CUDD021)
  • 5.00m (3.50m etw) grading 4.82g/t gold from 124m (22CUDD022)
  • 12.70m (8.89m etw) grading 3.60g/t Au from 329m (22CUDD022)

Four diamond holes were drilled in the southern project area following up anomalous high-grade intersections generated from previous aircore programs. Aircore drilling continued during the quarter completing first pass drill coverage over all regional targets.

Location plan showing diamond drill hole locations at Cue reported during the December quarter

Exploration results

The information in this report that relates to exploration results listed in the table below is based on work compiled by the person whose name appears in the same row, who is employed on a full-time basis by Evolution Mining Limited and is a Member of either the Australasian Institute of Mining and Metallurgy (AusIMM) or the Australian Institute of Geoscientists (AIG). Each person named in the table below has sufficient experience which is relevant to the style of mineralisation and types of deposits under consideration and to the activity which he has undertaken to qualify as a Competent Person as defined in the JORC Code 2012. Each person named in the table consents to the inclusion in this report of the matters based on his information in the form and context in which it appears.

For more information: Evolution Mining'
Emanuele Giovannini
Digital marketing specialist, Heavy Equipment journalist.