Mandilla Gold Project
Astral Resources 100%
The Mandilla Gold Project is situated in the northern Widgiemooltha greenstone belt in the western part of the Kalgoorlie geological domain, some 70 kilometres south of Kalgoorlie.
The Project lies on the western margin of a porphyritic granitic intrusion known as the Emu Rocks Granite. The granite intrudes volcanoclastic sedimentary rocks in the project area which form part of the Spargoville Group. Significant NW to WNW-trending structures along the western flank of the project are interpreted from aeromagnetic data to cut through the granitic intrusion and may be important in localising mineralisation at Theia (formerly Mandilla East). A second sub-parallel structure hosts gold mineralisation at Iris (formerly Mandilla South). In this area, a mineralised footprint extending over a strike length of approximately 700m has been identified.
The Mandilla Gold Project is covered by existing Mining Leases which are not subject to any third‐party royalties other than the standard WA Government gold royalty.
On 18 January 2022, the Company announced an updated JORC 2012 Mineral Resource Estimate (MRE) of 24Mt at 1.0g/t Au for 784koz of contained gold, encompassing the cornerstone Theia and Iris deposits, and an inaugural MRE at the Eos discovery. The MRE was prepared by independent consultant Cube Consulting in accordance with the JORC Code (2012 Edition).
This represented the third MRE published for Mandilla, demonstrating the Company’s ability to continue to grow its Mineral Resource inventory as it progresses its strategy to develop a long-term gold business in the Kalgoorlie region.
The locations of the optimised pit shells based on a gold price of AUD$2,500 per ounce are set out in plan view in Figure 2 below.
Theia is the main deposit at Mandilla, representing 84% of the reported MRE. The total MRE at Theia is 19Mt at 1.1g/t Au for 658koz of contained gold. Since the August MRE, the number of contained gold ounces interpreted at Theia increased by 17%, based largely on the inclusion of assays from approximately 12,000 metres of new drilling.
Figure 3 below shows the Mineral Resource for Theia within the optimised pit shell in cross-section.
The Mineral Resource at Iris is 4Mt at 0.8g/t Au for 115koz of contained gold. Since the August MRE was reported, assays from an additional 3,000 metres of drilling were included in the January 2022 MRE.
Section 2, as illustrated in Figure 4 below, shows Iris in cross-section.
The Mineral Resources identified on this section demonstrate the high-grade zone that is interpreted to be associated with the sediment/intrusive contact.
At Eos, previously identified mineralisation was recently followed up with a modest RC drilling program consisting of 11 holes for 950 metres reported in August 2021. This successful program was expanded, with a further 36 holes drilled for a total of 3,626 metres in December 2021.
A maiden Inferred Mineral Resource of 0.3Mt at 1.2g/t Au for 11koz of contained gold was declared at Eos. Figure 5 below shows the same oblique long projection of Eos as previously reported to the ASX on 15 December 2021.
Drilling at Eos has been relatively wide spaced (40m x 40m). Further Resource definition drilling is currently ongoing.