Potential Applications of Palaeomagnetism in Mineral Exploration in Northern Australia

Lesley A.I Wyborn

doi:10.1071/EG993219

ISSN: 0812-3985
E-ISSN: 1834-7533

Potential Applications of Palaeomagnetism in Mineral Exploration in Northern Australia
Authors Lesley A.I Wyborn^a
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^a Australian Geological Survey Organisation, PO Box 378, Canberra, , ACT, 2601
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 24, Issue 2, Jun 1993, p. 219 - 221
DOI: https://doi.org/10.1071/EG993219
- Published online: 01 Jun 1993

Abstract

The recently determined apparent polar wander path (APWP) from the McArthur Basin, which covers the period between 1700 to 1500 Ma, offers a relative time scale of great potential to the minerals exploration industry in the Proterozoic of Northern Australia. It may be used to correlate metallogenically important, volcanic-poor sedimentary packages, which host many significant deposits: it may also be used to track the alteration or plumbing systems associated with known mineralising events. In determining the APWP, several distinct, regional magnetic overprints were recognised in the McArthur Basin. The overprints are believed to be related to regional-scale alteration events associated with significant Proterozoic metallogenic episodes. To be useful to the minerals industry the APWP does not necessarily need to be calibrated in terms of an absolute time scale. In effect, the APWP is a relative time scale, similar to biostratigraphic zonations widely used by the oil industry in exploration in Phanerozoic terranes.

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References

Bain, J.H.C., Heinrich, C.A., and Henderson, G.A.M., (1992), ‘Stratigraphy, structure and metasomatism of the Haslingden group, east Moondarra area, Mount Isa: a deformed and mineralised Proterozoic multistage rift-sag sequence’. AGSO Bulletin, 243, 125–136.
Giddings, J.W., and Idnurm, M., (1993), ‘Significance of overprint magnetizations in the Palaeoproterozoic Kombolgie Formation, western McArthur Basin, N.T.’, this volume.
Heinrich, C.A., (1993), ‘Regional evidence for Mount Isa style copper ore systems’. AGSO Res. Newslet., 18, 9–11.
Idnurm, M., Giddings, J.W., and Plumb, K.A., (1993), ‘Apparent polar wander and reversal stratigraphy of Palaeo-Mesoproterozoic Southeastern McArthur Basin, Australia’. Precamb. Res., in press.
Idnurm, M., Giddings, J.W., and Plumb, K.A., (1993), ‘Palaeomagnetism of the southeastern McArthur Basin: Poles, overprints and reversals’, this volume.
Idnurm, M. and Heinrich, C.A., (1993), ‘A palaeomagnetic study of hydrothermal activity and uranium mineralization at Mount Painter, South Australia’. Aust. J. Earth Sci., 40, 87–101.
Maas, R., (1989), ‘Nd-Sm isotopic constraints on the age and origin of unconformity-type uranium deposits in the Alligator Rivers Uranium Field, Northern Territory, Australia’. Econ. Geol., 84, 64–90.
Page, R.W., (1993), ‘Geological constraints given by U-Pb Zircon Geochronology in the Mount Isa Inlier’. Aust. Instit. Geosci. Bull., 13, 13–15.
Trench, A., Dentith, M.C. and Li, Z.X., (1992), ‘Palaeomagnetic dating of mineral deposits: a review and a Western Australian perspective’. Explor. Geophys., 23, 373–380.
Wyborn, L.A.I., Page, R.W., and Parker, A.J., (1987), ‘Geochemical and geological signatures in Australian Proterozoic igneous rocks’. pp 377–394, in, Pharaoh, T.C., Beckinsale, R.D. and Rickard, D., (Eds), Geochemistry and Mineralisation of Proterozoic Volcanic Suites. Geol. Soc. Lond., Spec. Publ., 33.
Wyborn, L.A.I., Valenta, R.K., Jagodzinski, E.A., Morse, M., and Wellman, P., (1989), ‘Integration of multiple geoscience data sets in the Coronation Hill region, NT, as an aid to delineating areas of potential mineralisation’. BMR Res. Symp., 1989.

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Article Type: Research Article

Keyword(s): mineral exploration; overprints; palaeomagnetism

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Potential Applications of Palaeomagnetism in Mineral Exploration in Northern Australia

Abstract

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