Magnetic petrology: Application of Integrated Rock Magnetic and Petrological Techniques to Geological Interpretation of Magnetic Surveys

D. A. Clark; D. H. French; M. A. Lackie; P. W. Schmidt

doi:10.1071/EG992065

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

Magnetic petrology: Application of Integrated Rock Magnetic and Petrological Techniques to Geological Interpretation of Magnetic Surveys
Authors D. A. Clark^a, D. H. French^a, M. A. Lackie^a and P. W. Schmidt^a
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^a CSIRO Division of Exploration Geoscience, PO Box 136 North Ryde, NSW, 2113
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 23, Issue 1-2, Mar 1992, p. 65 - 68
DOI: https://doi.org/10.1071/EG992065
- Published online: 01 Mar 1992

Abstract

Interpretation of magnetic surveys in terms of geology is hampered by poor correspondence between broad lithological categories and magnetic properties, and by lack of knowledge of the geological factors that influence the magnetisation of rocks. Magnetic petrology is the integrated application of rock magnetic and conventional petrologic techniques to identify and characterise the magnetic minerals in rocks. This information elucidates the factors that produce, alter and destroy magnetic minerals and thereby influence the bulk magnetic properties of the rocks and their associated magnetic anomalies. Improved understanding of magnetic petrology is therefore essential for maximising the geological information that can be obtained from magnetic anomaly patterns.

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2026-01-17

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References

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Evans, B. W., and Frost, B. R. (1975). ‘Chrome-spinel in progressive metamorphism — a preliminary analysis’. Geochim. Cosmochim. Acta39, 959-972.
Irvine, R. J., and Smith, M. J. (1990). ‘Geophysical exploration for epithermal gold deposits’. J. Geochem. Explor. 36, 375-412.
Ishihara, S. (1981). ‘The granitoid series and mineralization’. Econ. Geol. 75, 458-484.
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Sillitoe, R. H. (1979). ‘Some thoughts on gold-rich porphyry copper deposits’. Mineral. Deposita14, 161-174.
Toft, P. B., Arkani-Hamed, J., and Haggerty, S. E. (1990). ‘The effects of serpentinization on density and magnetic susceptibility: a petrophysical model’. Phys. Earth Planet. Inter. 65, 137-157.
Wager, L. R., and Brown, G. M. (1967). ‘Layered igneous rocks’. Oliver and Boyd, Edinburgh, 588 pp.

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Article Type: Research Article

Keyword(s): geological interpretation; magnetic interpretation; Magnetic petrology; magnetic surveys; rock magnetism

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Magnetic petrology: Application of Integrated Rock Magnetic and Petrological Techniques to Geological Interpretation of Magnetic Surveys

Abstract

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