Magnetic mapping of river channel and palaeochannel deposits - an example from Teetulpa, South Australia

Clive Foss; Gary Reed; Tim Keeping; Marc Davies

doi:10.1071/ASEG2015ab189

24th International Geophysical Conference and Exhibition – Geophysics and Geology Together for Discovery

ISSN: 2202-0586
E-ISSN:

oa Magnetic mapping of river channel and palaeochannel deposits - an example from Teetulpa, South Australia
Authors Clive Foss^a, Gary Reed^b, Tim Keeping^c and Marc Davies^d
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^a CSIRO Mineral Resources Flagship, Riverside Corporate Park 51 Delhi Road, North Ryde, NSW, 1670, , Australia, [email protected] ^b Geological Survey of South Australia, 4/101 Grenfell St Adelaide, 5000, [email protected] ^c Geological Survey of South Australia, 4/101 Grenfell St Adelaide, 5000, [email protected] ^d Geological Survey of South Australia, 4/101 Grenfell St Adelaide, 5000, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2015, Issue 24th International Geophysical Conference and Exhibition – Geophysics and Geology Together for Discovery, Dec 2015, p. 1 - 4
DOI: https://doi.org/10.1071/ASEG2015ab189
- Published online: 01 Dec 2015

Abstract

High-resolution, low-level aeromagnetic surveys of the Teetulpa gold field in the Nackara Arc, South Australia, map the distribution of magnetic minerals in the alluvial cover, in the form of linear anomalies with a dendritic pattern typical of drainage systems. These anomalies are not evident in the regional aeromagnetic data flown at wider line spacing and higher elevation.Combination of the high resolution magnetic field data with mapping of present day drainage is an important input to gold exploration of the area. The magnetic anomalies can be modelled and inverted, and this might provide quantitative information to indirectly target and evaluate gold resources. Sampling and statistical analysis of relationships between the gold and magnetic minerals within the alluvium are required to form the basis for any such study.

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References

Hou, B., Frankes, L.A., Alley, N.F., Stamoulis, V. And Rouett, A., 2000. Geoscientific signatures of Tertiary palaeochannels and their significance for mineral exploration in the Gawler Craton region. MESA Journal, Vol. 19, p. 36-39.
Mackey, T., Lawrie, K., Wilkes, P., Munday, T., Kovacs, N., Chan, R., Gibson, D., Chartres, C., and Evans, R., 2000. Palaeochannels near West Wyalong, New South Wales: A case study in delineation and modelling using aeromagnetics. Exploration Geophysics, Vol. 31, p. 1-7.
Miller, D.T., 1998. ELA 56/98 Geophysical Interpretation and Exploration Target Identification. https://sarigbasis.pir.sa.gov.au/WebtopEw/ws/samref/sarig1/wc i/Record?w=NATIVE%28%27REFERENCE+ph+is+%27%27 10003%270/o270/o27°/o29&sid=eac509472ab74a3f9554c3dOfd5 4d56&upp=0&order=native%28%27title%27%29&rpp=25&r = 1&set=1&m=1
Morris, B.J. and Horn, C.M., 1990. Review of gold mineralisation in the Nackara Arc. Mines and Energy Review, South Australia, Vol. 157, p. 51-58.

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Article Type: Research Article

Keyword(s): alluvial; drainage; gold; magnetic anomaly

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oa Magnetic mapping of river channel and palaeochannel deposits - an example from Teetulpa, South Australia

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