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Thundelarra’s geophysical survey methods detect gold prospects at Garden Gully

Sub-Audio Magnetics returns encouraging preliminary results at Crown Prince and Lydia prospects.
RC drilling rig at Garden Gully
The company’s methods are being used to generate new drilling targets

Thundelarra Ltd (ASX:THX) has demonstrated that Sub-Audio Magnetics (SAM) geophysical surveys are effective in detecting prospective structures at its Garden Gully Gold Project in Western Australia.

Preliminary results from a SAM survey underway at the Crown Prince and Lydia prospects are encouraging.

They are already showing that this method will be of value for future exploration to identify further targets over areas with extensive cover.

READ: Thundelarra focused on recommencing high-grade gold mining at Garden Gully

At Crown Prince, the survey has defined several bedrock conductive units which have been disrupted by cross-cutting structures.

These have a clear correlation with the known gold mineralisation.

It is a similar story at Lydia prospect where the NE/SW dipole SAM surveying shows good correlation with gold intersections from previous drilling.



The Garden Gully project area is characterised by a layer of transported cover of variable thickness, underlain in places by a sub-surface layer of duricrust.

Thundelarra believes these factors have contributed to past geochemistry surveys failing to identify and locate accurately the underlying primary mineralised structures.

This was the rationale for a recent program of aircore drilling.

Surveys at Transylvania and Young

The company’s exploration methods have found these structures and SAM surveys are being undertaken over the Transylvania and Young prospects.

Other selected areas with complete cover will follow soon after.

Samples collected

There have been 1,250 samples collected from recent aircore, reverse circulation and diamond drilling.

These have been submitted to Nagrom laboratory in Perth for multiple elements analysis.

After receiving and collating assay results the company will also consider the detailed interpretation of survey findings to determine the next exploration steps, including drilling.

Garden Gully prospects.

Garden Gully comprises 15 granted prospecting licences and two granted exploration licences covering about 78 square kilometres.

It is in the Murchison region about 20 kilometres northwest of the town of Meekatharra.

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