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Index Geophysics

Magnetic techniques for ascertaining the nature of iron oxide grains in basalts


Title (Dublin Core)

en-US Magnetic techniques for ascertaining the nature of iron oxide grains in basalts

Description (Dublin Core)

en-US Qualitative techniques are described by which the domain nature and magnetite-maghemite oxidation state of the iron oxides in basalts may be rapidly identified through measurements of hysteresis and susceptibility over a wide temperature range. Detailed studies made on different suites of basalts have revealed that their magnetic properties in most cases can be explained only on the basis of single-domain behaviour. Also it has been found that the observed variations in these properties between basalts are usually best explained by differences in the position the iron oxide minerals in the different samples occupy along the magnetite-maghemite oxidation chain. These observations suggest that the role of titanium usually found in association with iron oxides in basalts is to subdivide the grains physically rather than to form solid solutions of titanomagnetites or titanomaghemites. Some implications of these results to basalt formation and the magnetic anomalies such rocks could cause are discussed.


Creator (Dublin Core)

Radhakrishnamurty, C.
Deutsch, E.R.

Subject (Dublin Core)

en-US Magnetic techniques
en-US Basalt
en-US Susceptibility
en-US Hysteresis
en-US Oxidation
en-US Magnetite
en-US Titanium
en-US Domains
en-US Superparamagnetic
en-US Theory

Publisher (Dublin Core)

en-US Journal of Geophysics

Date (Dublin Core)


Type (Dublin Core)

en-US Peer-reviewed Article

Format (Dublin Core)


Identifier (Dublin Core)

Source (Dublin Core)

en-US Journal of Geophysics; Vol 40 No 1 (1974): Journal of Geophysics; 453-465

Language (Dublin Core)


Relation (Dublin Core)