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Index Geophysics

Grain size effect on the low-temperature oxidation of titanomagnetite


Title (Dublin Core)

en-US Grain size effect on the low-temperature oxidation of titanomagnetite

Description (Dublin Core)

en-US The low-temperature oxidation process in titanomagnetite has been investigated. Using samples with controlled grain sizes, it has been shown that there is a critical grain size in the oxidation behaviour of titanomagnetites; smaller grains undergo low-temperature oxidation, while larger ones separate to Fe-rich titanomagnetite and Ti-rich hemo-ilmenite (high-temperature oxidation). The difference between the results of similar experiments by Ozima and Sakamoto (1971) and by Readman and O'Reilly (1972) can be explained in terms of differences in partide sizes of titanomagnetites. Comparable results were obtained from natural subaerial and submarine basalts; when they are heated to temperatures between 150° C and 375° C, oxidation proceeds in submarine basalts, but it does not in subaerially erupted basalts and a high-temperature oxidation process occurs. This fact indicates that the grain size of the magnetic minerals is one of the most important controlling factors in low-temperature oxidation of titanomagnetites.

Creator (Dublin Core)

Nishitani, T.
Kono, M.

Subject (Dublin Core)

en-US Rock magnetism
en-US Low-temperature oxidation
en-US Titanomagnetite
en-US Grain size effects
en-US Solid Earth

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 50 No 1 (1982): Journal of Geophysics; 137-142

Language (Dublin Core)


Relation (Dublin Core)