Legacy Minerals Maps Strong Untested Copper-Gold Targets at Rockley

800m Central Target Takes Priority

Legacy Minerals Holdings Limited (ASX:LGM) has found its most compelling copper-gold exploration target at Rockley so far: an untested chargeability zone stretching about 800m beneath the Crystal Hill soil anomaly. The Central target reaches modelled responses of more than 45mV/V from depths of roughly 100m to 200m and has been ranked the company’s highest-priority target from a recent induced polarisation survey.

The survey also outlined a North-West target exceeding 40mV/V at approximately 200m depth and an East target returning 35mV/V at a similar depth. All three anomalies remain untested by drilling. Legacy says chargeability can be associated with disseminated sulphides or alteration, but the response can also be generated by clay, graphite, magnetite, serpentinised ultramafic rocks and other geological contrasts.

Geophysical Response Meets Surface Assays

The Central target’s appeal comes from its coincidence with existing geochemical evidence rather than the IP reading alone. Rock-chip samples collected around historic workings at Crystal Hill returned selective assays of up to 9.3% copper, 3.9 grams per tonne gold and 415 grams per tonne silver. Copper oxides including malachite and azurite, along with chalcopyrite, have also been identified at surface.

A first-pass soil survey covering 570 samples across 12 square kilometres produced a central zone of elevated gold, arsenic, molybdenum and antimony, with less coherent copper, lead and zinc anomalism. The company says the broader rock-chip anomalous area covers about 3 square kilometres, although those samples are reconnaissance results and are not necessarily representative of an underlying mineralised system.

Rockley Sits in Macquarie Arc Territory

Rockley is a 100%-owned project centred on exploration licence EL8926, about 25 kilometres west of Oberon in the Ordovician Macquarie Arc. That geological province hosts the Cadia Valley, Northparkes and Cowal copper-gold deposits, while the Bushranger deposit lies less than 15 kilometres away. Legacy also cites a 2019 assessment by Kenex and the Geological Survey of NSW that ranked the Rockley area among the most prospective parts of the Rockley-Gulgong Volcanics for porphyry-related copper-gold mineralisation.

That setting improves the geological case, but it does not turn a geophysical anomaly into a discovery. The IP survey covered five lines, and one line returned background chargeability of less than 3mV/V across its length. Legacy’s own technical discussion stresses that the three reported zones are modelled responses, not mineralisation or resource estimates.

Drilling Still Requires Planning and Funding

Legacy is now integrating the two-dimensional and three-dimensional inversion models with mapping, structural interpretation and soil and rock-chip geochemistry. Drill testing is under consideration, subject to geological planning, landholder access, statutory approvals and funding. No Mineral Resource has been reported at Rockley.

For shareholders, the next meaningful step is not another attractive contour map but a decision on whether the company can convert the Central, North-West and East targets into drill collars. Until that happens, Rockley remains a promising target-generation story whose strongest evidence is still indirect.