Total development at Havieron surpasses 1,850m
Drilling intercepts significant zones of gold and copper mineralisation
Greatland Gold plc (AIM: GGP) is pleased to provide an exploration and development update for Havieron, its flagship gold-copper project located in the Paterson Province of Western Australia (Newcrest Mining Limited (“Newcrest“) is Greatland’s 70% joint venture partner in Havieron).
- Decline development:significant progress continues to be made with total development now exceeding 1,850m including over 1,520m advance of the main access decline
- Geotechnical conditions:improved geotechnical conditions have enabled increased productivity resulting in development outperforming the current schedule by 10%
- Drilling results:drilling confirms the presence of high grade gold and copper mineralisation outside the current Mineral Resource with recent results including:
– Northern Breccia: 29.9m @ 3.9g/t Au and 0.01% Cu from 945.1m
– Eastern Breccia: 57m @ 2.1g/t Au and 0.19% Cu from 1,262m
Greatland Managing Director, Shaun Day, commented:
“The Havieron team continues to deliver strong results at the project. Total development has now surpassed 1,850m and pleasingly, decline development is continuing ahead of the current schedule.”
“Our most recent drilling activities highlight the potential of high grade mineralisation outside the Southeast Crescent which could add significant value to the mine plan at Havieron with additional gold and copper mineralisation intersected at the Northern and Eastern Breccia zones.”
The main decline continues to progress ahead of the current schedule having surpassed 1,520m. Decline support excavations for ventilation, services and materials handling takes the total development to over 1,850m.
The total advance is 10% ahead of the current schedule due to improved geotechnical conditions and the ongoing focus on productivity improvements.
Drilling activities at Havieron recommenced at the beginning of February 2023 with three drill rigs onsite and four holes completed for a total of 5,214m. This most recent drilling takes the total drilling at the project to 331 holes for 293,878m.
Drilling has targeted growth opportunities within the Havieron mineral system at the Eastern Breccia and Northern Breccia domains with step out drilling to investigate near mine geophysical targets ongoing. The focus has now shifted to the evaluation of the deeper portions of the existing Southeast Crescent Mineral Resource, with drillholes HAD133W10, HAD171 and HAD172 completed since the beginning of February 2023 (see Figures 2 and 3).
New assay results have been received for four new drill holes along with final assays for lower priority areas from three holes completed in late 2022 (see Figures 1 and 2). Of these results, one hole within the Northern Breccia and one within the Eastern Breccia returned significant assay intercepts in excess of 50-gram metres of gold (Au ppm x length metres).
Figure 1 : 3D plan view schematic showing the spatial association of the current growth targets within the Havieron Deposit, Southeast Crescent, Northern Breccia, Northwest Pod and Eastern Breccia targets in relation to the existing mineralised extents. Also highlighted are all newly reported drilling result locations.
At the Northern Breccia (see Figures 1, 3 and 5), HAD098W9 was aimed at extending a zone of previously identified high-grade mineralisation. Encouragingly, the drill hole successfully intercepted several zones of mineralisation including 29.9m @ 3.9g/t Au and 0.01% Cu from 945.1m.
At the Eastern Breccia (see Figures 1, 3 and 4), HAD164W3 was aimed at testing the intersection with the Northern Breccia mineralisation. This drillhole successfully intercepted two significant zones of mineralisation:
- The upperzone which is situated over 200m vertically above the existing Mineral Resource – 57m @ 2.1g/t Au and 0.19% Cu from 1,262m including 10m @ 8.5g/t Au and 0.29% Cu from 1,307m
- The lower copper rich zone confirms the Mineral Resource at that position – 34m @ 0.8g/t Au and 0.61% Cu from 1,438m
Figure 2 : Schematic plan view map showing announced section locations, drill hole locations and significant intercepts reported in this release superimposed on the interpreted geology horizontal slice at level 3850mRL. (Previously reported holes are not shown for the sake of clarity. Note some holes and results appear on multiple sections due to the sections’ orientation and overlap.)
Near-Mine Step Out
The two near-mine drillholes (HAD169 and HAD170) were part of a recent programme evaluating geophysical targets outside of the Havieron mineral system. While no significant results were returned, the geological information derived from these more remote holes will be valuable in informing and improving the Havieron targeting models.
Figure 3 : Plan view schematic of a horizontal slice at 3850mRL through Havieron Mineral System, showing the extents of the 0.5g/t Au, 1.0 g/t Au and 2.0g/t Au LeapfrogTM grade shells with highlighted newly reported intercepts for this period. This diagram displays recent drilling and new assay results >50gram metres intersections. Refer to the inset diagram for relationship to all Havieron drilling.
Figure 4 : Schematic cross section of geology and recent drilling with significant new drillhole intercepts (looking northwest, Section Line S1, +/-100m section width, as shown in Figure 1 above). Due to section window size and orientation holes may appear on multiple sections. This diagram highlights >50gram metres intersections drilled during the period .
Schematic cross section of geology and significant new drillhole intercepts (looking northwest, Section Line S2, +/-100m section width, as shown in Figure 1 above). Due to section window size and orientation holes may appear on multiple sections. This diagram highlights >50gram metres intersections drilled during the period .
For further information, please contact:
Greatland Gold plc
Shaun Day, Managing Director | [email protected]
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