Highlights

  • Drilling at the Oval target confirmed stratigraphy and alteration consistent with VMS and DeGrussa-style copper systems.
  • Downhole electromagnetic surveys will map off-hole conductors indicating primary massive sulphide lenses.
  • GTE also holds the Firebird Gold Project and Fairbairn Base Metal Project in Western Australia.
  • The Yerrida Basin preserves prospective stratigraphic horizons analogous to the adjacent Bryah Basin.

Adjacent to the Bryah Basin that hosts Sandfire Resources' DeGrussa copper-gold mine, Great Western Exploration (ASX:GTE) is drilling through the Yerrida Basin's stratigraphy at the Oval target — and the geology emerging from the core confirms the basin can host the same style of mineralisation that made DeGrussa one of Australia's standout copper discoveries.

Oval and Juggernaut: VHMS Stratigraphy Confirmed

Focused diamond and reverse circulation drilling at the Oval and Juggernaut copper-gold targets within the Yerrida North Project evaluated coincident electromagnetic and gravity geophysical anomalies along major regional crustal fault structures. Detailed geological logging confirmed stratigraphy, hydrothermal alteration, and disseminated sulphide assemblages consistent with large-scale volcanogenic massive sulphide mineralising systems.

The Oval target is a compelling geological analogue to Sandfire Resources' DeGrussa copper-gold deposit in the adjacent Bryah Basin. GTE's drilling validated that the Yerrida Basin preserves the prospective stratigraphic horizons and deep volcanic-sedimentary contacts necessary to trap giant polymetallic mineral deposits.

Downhole EM to Vector Follow-Up Drilling

GTE's immediate exploration roadmap centres on integrating downhole electromagnetic surveys across newly completed drill holes. DHEM provides deep subsurface geophysical detection, mapping off-hole conductive plates that represent primary massive sulphide lenses within several hundred metres of existing drill collars.

Subsequent operational phases will involve follow-up diamond drilling to test prioritised off-hole conductors, alongside regional reconnaissance mapping and auger geochemical sampling across untested corridors of the Yerrida North tenement package.

Broader Portfolio and Commodity Exposure

Beyond Yerrida North, GTE maintains the Firebird Gold Project and Fairbairn Base Metal Project in Western Australia, creating a multi-commodity pipeline. Copper's structural role in power grid expansion, renewable energy infrastructure, and electric vehicles underpins strong commercial interest in any authentic VMS discovery. Gold co-product credits would provide economic resilience against cyclical base metal price volatility.

GTE shares closed at $0.008 on 2 October 2026 with 500,000 shares traded, establishing a micro-cap valuation of $6.22 million — a 57.90% decline over 12 months reflecting risk-off sentiment toward greenfield exploration.

Geological and Financial Exploration Risks

Deep geophysical targets carry significant geological risk — electromagnetic conductors may represent non-mineralised lithologies such as graphitic shales, barren iron sulphides, or saline groundwater rather than economic copper-gold mineralisation.

GTE's limited cash reserves require periodic equity capital injections to fund continuous drilling. Remote operations in Western Australia are also subject to inflationary contractor costs, supply chain delays, and stringent environmental and heritage protection approvals prior to ground-disturbing activities.