Study of groundwater flow in sediments and regolith defined by airborne geophysical surveys.

Street, G; Abbott, Simon

doi:10.1071/aseg2007ab141

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“…Both systems have been used extensively in Australia from 2004 and onwards. Although it was developed primarily for mineral exploration, (Hashemi and Meyers, 2004;Sykes et al, 2006) the system has also been applied to regolith mapping (Stolz, 2005;Street and Abbott, 2007). Boyd and Vrbancich (2007), Vrbancich and Fullagar (2007) and Vrbancich (2011) have also used a variant of the system (SeaTEM) for bathymetric surveying in shallow waters.…”

Section: Reptem Systemmentioning

confidence: 99%

Integrated interpretation of overlapping AEM datasets achieved through standardisation

Sørensen

Munday

Heinson

2015

Exploration Geophysics

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Numerous airborne electromagnetic surveys have been acquired in Australia using a variety of systems. It is not uncommon to find two or more surveys covering the same ground, but acquired using different systems and at different times. Being able to combine overlapping datasets and get a spatially coherent resistivity-depth image of the ground can assist geological interpretation, particularly when more subtle geophysical responses are important. Combining resistivity-depth models obtained from the inversion of airborne electromagnetic (AEM) data can be challenging, given differences in system configuration, geometry, flying height and preservation or monitoring of system acquisition parameters such as waveform. In this study, we define and apply an approach to overlapping AEM surveys, acquired by fixed wing and helicopter time domain electromagnetic (EM) systems flown in the vicinity of the Goulds Dam uranium deposit in the Frome Embayment, South Australia, with the aim of mapping the basement geometry and the extent of the Billeroo palaeovalley. Ground EM soundings were used to standardise the AEM data, although results indicated that only data from the REPTEM system needed to be corrected to bring the two surveys into agreement and to achieve coherent spatial resistivity-depth intervals.

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