Ann: GBR moves to 100% ownership of Yamarna, page-3

The Yamarna Project comprises eight granted tenements across two projects, Winchester and
Yamarna, covering 358km2 of tenure. The Project is located c.130km east of Laverton and 25km
west of Gold Road’s and Gold Fields’ +6Moz Gruyere Gold Mine. Yamarna is a multi-commodity
project with potential for magmatic Ni-Cu-PGE mineralisation and lode gold.
Great Boulder’s core focus has been on the Mt Venn base metals sulphide deposit discovered in
October 2017. Following this the Company completed 13,700m drilling that demonstrated multiple,
broad lenses of shallow Cu-Ni-Co sulphide mineralisation. Drill targeting based upon EM surveys
has been extremely successful, with sulphides identified in every EM target drilled to date.
ASX Announcement
4 JUNE 2021
ASX Code: GBR Contact: Andrew Paterson, Managing Director E: [email protected] GREATBOULDER.COM.AU P: +61 8 9321 6037 Level 1, 51 Colin St West Perth WA 6005 ABN 70 611 695 955
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Mineralisation at Mt Venn occurs within multiple broad lenses, with significant results including:
o 48m at 0.8% Cu, 0.2% Ni, 0.07% Co from 103m in 17MVRC015
o 18m at 0.8% Cu, 0.1% Ni, 0.02% Co from 187m in 17MVRC001
o 18m at 0.7% Cu, 0.2% Ni, 0.05% Co from 92m in 17MVRC022
o 27m at 0.6% Cu, 0.2% Ni, 0.05% Co from 43m in 18MVRC001