Great Western Launches Precision Gravity Survey to Pinpoint Copper-Gold Rich Zones
Great Western Exploration has initiated a detailed ground gravity survey at its Oval and Oval South targets in Western Australia, aiming to refine the search for high-grade copper-gold VHMS mineralisation. The survey builds on promising drill results and extensive geophysical data, with findings expected by early August 2025.
- Close-spaced ground gravity survey underway at Oval and Oval South targets
- Targets interpreted as potential Volcanic Hosted Massive Sulphide (VHMS) systems
- Previous drilling revealed strong pathfinder geochemical signatures
- Survey aims to refine airborne gravity data and identify dense massive sulphide zones
- Company holds $3.7 million cash, well-funded for ongoing exploration
Exploration Intensifies at Yerrida North
Great Western Exploration (ASX, GTE) has commenced a close-spaced ground gravity survey at its Oval and Oval South copper-gold targets, situated within the Yerrida North Project in Western Australia. These targets lie adjacent to the prolific DeGrussa and Monty VHMS deposits, renowned for their rich copper-gold mineralisation. The new survey aims to sharpen the resolution of existing airborne gravity data to better delineate zones of dense rock potentially indicative of massive sulphide mineralisation.
Building on Promising Drill Results
Previous drilling at Oval has uncovered multiple geological horizons with strong pathfinder geochemical signatures consistent with VHMS systems. Notably, the latest assays revealed a sedimentary horizon with the strongest VHMS signature recorded to date, intersected between 820-830 meters down-hole. These findings suggest proximity to a volcanic marine environment conducive to copper-gold enrichment, akin to the nearby DeGrussa deposit.
Refining the Geological Model
The ground gravity survey is designed to complement a substantial dataset from prior exploration activities, including diamond drilling, surface and down-hole electromagnetic surveys. By integrating these datasets, Great Western aims to construct a comprehensive geological model to guide future drilling campaigns, particularly at the yet-to-be-drilled Oval South target. The survey’s higher resolution gravity data will help pinpoint high-density massive sulphide bodies that are key indicators of VHMS mineralisation.
Strategic Location and Geological Setting
The Oval targets are strategically positioned along the fertile Ida Fault and within an east-west intrusive corridor, geological features known to facilitate metal accumulation. The volcanic and sedimentary rocks belong to the Killara Formation, considered stratigraphically equivalent to the DeGrussa Formation, which hosts one of Australia’s most significant VHMS deposits. This geological setting enhances the prospectivity of the Yerrida North Project for substantial copper-gold mineralisation.
Well-Funded for Exploration Ahead
Great Western maintains a robust cash position of $3.7 million as of March 2025, providing solid financial backing for its exploration programs. The company anticipates completing the gravity survey and interpreting the results by early August 2025, with updates to follow. This methodical approach underscores Great Western’s commitment to unlocking the potential of its Yerrida North assets.
Bottom Line?
As Great Western refines its geological targets with advanced gravity data, the next drill phase could be pivotal for confirming a new VHMS copper-gold discovery.
Questions in the middle?
- Will the gravity survey identify definitive massive sulphide bodies to justify further drilling?
- How might the new data influence the scale and timing of upcoming drilling campaigns at Oval South?
- What are the implications of these findings for Great Western’s valuation and investor confidence?
