• June 10, 2022

Bonanza Grade at Wiluna; Bulletin North Discovery

Published on June 10th, 2022


• First hole at Bulletin North Discovery target intersects high-grade intercept of 0.30m @ 3,270g/t in free-milling vein-style mineralisation, and sulphide-style intercept of 1.50m @ 8.30g/t in potential new sulphide shoot:

WUDD0076: 0.30m @ 3,270g/t
10.00m @ 2.80g/t including 1.50m @ 8.30g/t

• Further wide high-grade intercepts from Happy Jack resource infill program:

HJRD00084: 7.84m @ 6.48g/t
HJRD00185: 11.95m @ 6.04g/t
HJRD00192: 11.00m @ 5.92g/t

• Grade control drilling validates geology modelling and supports the immediate production profile at Bulletin and Happy Jack for the ramp-up of sulphide concentrate production:

HJGC2364: 2.55m @ 63.87g/t
HJGC2366: 4.10m @ 18.91g/t including 0.70m @ 105g/t
HJGC2319: 1.85m @ 30.80g/t
HJGC2347: 5.00m @ 12.67g/t and 2.16m @ 14.32g/t
BUGC0038: 11.56m @ 6.72g/t

• Grass roots Li and Ni-Cu-Co-PGE sulphide exploration programs in planning stages on regional tenure; these programs are to assist the Company in assessing opportunities to monetise the significant Ni and Li assets in WMC’s large tenement package for our shareholders.

The Bulletin North target is one of nine large-scale sulphide shoot targets to be tested as part of a 40,000m discovery program across the Wiluna mine site.

Further, high-grade results from resource development and grade control drilling at Bulletin and Happy Jack zones support geology modelling and the short-term production profile in immediate mining areas during the
ramp-up in sulphides concentrate production.

The Company’s 1,600km2 exploration tenure in the broader Wiluna region is also geologically prospective for lithium pegmatites and nickel-copper-cobalt-platinum group element (Ni-Cu-Co-PGE) mineralisation. Grass-roots
exploration has commenced with a review of historical geophysical and geological datasets and identification of initial targets that require follow-up field work.


The Company has commenced a 40,000m Discovery drilling campaign to test nine targets for new high-grade sulphide shoots “under the headframe” at Wiluna. High-grade >5g/t shoot discoveries are targeted to
substantially enhance the early years of the current mining plan with the intention of increasing the underground ore grade which will support plans to grow gold production with higher grade mining areas. The Company is
targeting large-scale, high-grade shoot targets like those historically mined at Wiluna, such as the Bulletin shoot that has an endowment of past production combined with the current mineral resource of approximately 1.5Moz
@ 7g/t (Figure 1).

Initial targets include shallow strike extensions in the upper 600m on both the East and West structures, and below the major historical production areas. Targets are defined where the Wiluna orebody remains open along
strike, down dip and on parallel structures. Sulphide shoots are interpreted to have formed in a predictable structurally repeated pattern controlled by the steeply south-plunging shoot corridors in conjunction with northplunging trends and rock unit boundaries. In addition, first-pass seismic transverse lines acquired during 2021 showed that gold structures extend well below and beyond the current Mineral Resource limits, supporting

Discovery drill hole targeting (see ASX report dated 6 May 2021).

Drilling is in progress at Bulletin North, East Lode South, and on the first of eight deep holes at the East & West Lower targets, which will see some of the deepest holes ever completed at Wiluna to 1,850m down-hole depth
(Figure 1).


The Company commissioned lithium exploration experts at CSA Global, an ERM Group Company, to provide Li targeting and exploration advice. WMC’s tenure is considered prospective for Lithium-Caesium-Tantalum (LCT)
type pegmatites, and the discovery of Liontown Resources Ltd.’s world-class Mt Mann-Kathleen Valley LCT pegmatite group only 90 km to the south of Wiluna and within the same greenstone belt adds strong empirical
support. Following a review of available regional geological and geophysical data, CSA Global selected three areas in which to focus initial exploration for LCT pegmatites.

Read full Announcement

SOURCE: Wiluna Mining
DATE: April 13, 2022

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