Great Western’s Gravity Survey Points to Potential Core of Large VHMS System at Oval Targets
Konrad Forrest
15 August 2025 | Perth, WA – Great Western Exploration (ASX:GTE) says a close-spaced ground gravity survey at the Oval and Oval South targets (Yerrida North Project, WA) has outlined a density high coincident with its most prospective VHMS horizon—interpreted as the potential central “black-smoker” zone of a large DeGrussa-style copper-gold system.
Key points
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200m × 200m ground gravity has defined an anomalous high that aligns with the geologically modelled VHMS horizon previously identified in drilling.
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Company interprets Oval and Oval South as part of one mineralising system; prior drilling likely tested the fringes of multiple VHMS horizons.
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The anomaly sits at the intersection of the Ida Fault and a GSWA-interpreted growth fault, a favourable structural setting for VHMS mineralisation.
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A 750m diamond hole is designed to test the anomaly; GTE will apply for EIS co-funding, with outcomes expected in October 2025.
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GTE reports a $2.7m cash position at 30 June 2025, funding upcoming programs.
The Oval Targets lie adjacent to the DeGrussa and Monty VHMS deposits, with geochemistry, stratigraphy and pathfinder element associations supporting a VHMS environment within rocks correlated to the DeGrussa Formation.
Source: Great Western Exploration ASX announcement, “Yerrida North Project – Oval Targets: Gravity Survey Defines Potential Core of a Large VHMS Copper-Gold System,” 15 Aug 2025