Field Examples of Controls on Magnetite Content

W. E. S. Urquhart

doi:10.1071/EG989093

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

Field Examples of Controls on Magnetite Content
Authors W. E. S. Urquhart^a
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^a Urquhart Dvorak Limited, 24 Mowat Awe Toronto, , Ont., Canada, M6K 3E8
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 20, Issue 1-2, Mar 1989, p. 93 - 97
DOI: https://doi.org/10.1071/EG989093
- Published online: 01 Mar 1989

Abstract

Field examples of four processes that control the formation of magnetite in rocks are discussed here. Oxygen fugacity conditions, original chemistry, and metamorphic grade are examined for mafic volcanic sequences. Sedimentary facies change within an iron formation is studied. In all the cases the understanding of the cause of the presence or absence of magnetite greatly improved the effectiveness of using magnetic data for geological mapping purposes.

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1989-03-01

2026-01-16

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References

Grant, F. S. (1984) ‘Aeromagnetics, geology and ore environments’, In ‘Magnetite in igneous, sedimentary and metamorphic rocks: an overview’, Geoexploration,23 (1984/85) 303-333.
Haggerty, S. E. (1976) ‘Opaque Mineral Oxides in Terrestrial Igneous Rocks’, in OXIDE MINERALS, Mineralogical Society of America Short Course Notes, vol. 3.
Jensen, L. S. (1978) ‘Geology of Thackeray, Elliot, Tannahill and Dokis Townships, District of Cochrane’, Ontario Geological Survey, Geoscience Report 165, 71p., accompanied by Maps 2367 and 2368, scale 1:31 680.
Urquhart, W. E. S., and West, G. F. (1979), ‘Aeromagnetic anomaly pattern in the English River Gneiss Belt, Superior Province’, Can. Jour, of Earth Sci.,16, 1920-1932.
Urquhart, W. E. S. (1988), ‘Geological Evaluation Of A Magnetic Survey In The Matagami Region Of Quebec’, Ph.D. thesis, University of Toronto.

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Article Type: Research Article

Keyword(s): Magnetic case history; Magnetic interpretation; Magnetite content

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Field Examples of Controls on Magnetite Content

Abstract

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