GBG Australia undertook a geophysical investigation to map areas of archeological significance at the site of an old Inn near Melbourne, Victoria. For this investigation Frequency Domain EM (FDEM), Ground Penetrating Radar (GPR) and Magnetic Gradiometry were utilised to gain information on any possible archeological remains within the area of investigation.
MASW data was collected using the GSSI EMP-400 Profiler. A frequency range of between 15 kHz and 10 kHz was used for this investigation which equated to a depth of investigation of approximately 0.5 m to 1.5 m.
The GPR investigation was undertaken using a SIR-3000 acquisition system and 400 MHz ground coupled antenna. The system was mounted in a cart for ease of investigation.
The Magnetic Gradiometry survey was undertaken with the GEM GSPM-35G Potassium gradiometer. The investigation was performed at 1 m centres with readings being undertaken every 15 ms.