Interpretation of helicopter AEM data from the Riverland Area, S.A.

Andy Green; Ross Brodie; Tim Munday

doi:10.1071/ASEG2004ab054

ISSN: 2202-0586
E-ISSN:

oa Interpretation of helicopter AEM data from the Riverland Area, S.A.
Authors Andy Green^a, Ross Brodie^b and Tim Munday^c
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^a OTBC Pty Ltd,, Australia, [email protected] ^b Geoscience Australia, , Australia, [email protected] ^c CRCLEME/CSIRO Exploration and Mining,, Australia, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2004, Issue ASEG2004 - 17th Geophysical Conference, Dec 2004, p. 1 - 4
DOI: https://doi.org/10.1071/ASEG2004ab054
- Published online: 01 Dec 2004

Abstract

RESOLVE frequency domain helicopter electromagnetic (HEM) data have been used to map the distribution of near-surface clay-rich sediments in and around the Riverland irrigation districts of South Australia.

The results of the inversion also allow us to reconstruct the strandline-dominated palaeo-topography left when the sea retreated from the Murray Basin in the Early-Mid Pliocene. The survey also revealed a hitherto unsuspected, deeper variability in conductivity following the Pliocene strand line pattern. The cause of this pattern is not clear, but could be due to variations in the porosity of Loxton Sands or to strandline-correlated variability in the elevation of the contact between the Bookpurnong Beds and the Lower Loxton sands.

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References

Brodie, R., Green, A., and Munday, T., 2004, Constrained inversion of helicopter AEM data for mapping the Blanchetown Clay. Extended Abstracts ASEG 17th Geophysical Conference and Exhibition, Sydney.
Green A.A., Brodie, R.C., and Munday, T.J., 2003. Constrained inversion of RESOLVE electromagnetic data, Riverland, South Australia. CRC-LEME Restricted Report 152R.
Roy, P.S., Whitehouse, J., Cowell, P.J., and Oakes, G., 2000, Mineral sands occurrences in the Murray Basin, southeastern Australia. Economic Geology, 95, 1107-1128
Stephenson, A.E., 1986. Lake Bungunnia-A Plio-Pleistocene Megalake in southern Australia, Palaeogeography, Palaeoclimatology, Palaeoecology, 57, p 137-156.

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Article Type: Research Article

Keyword(s): AEM; groundwater; inversion; irrigation; Murray Basin; Salinity

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oa Interpretation of helicopter AEM data from the Riverland Area, S.A.

Abstract

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