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Rock Magnetism of Lower/Middle Pleistocene Marine Sediments, Wanganui Basin, New Zealand

Roberts, Andrew P. and Phillans, Brad J. (1993) Rock Magnetism of Lower/Middle Pleistocene Marine Sediments, Wanganui Basin, New Zealand Geophysical Research Letters, 20, (9), pp. 839-842.

Record type: Article


Rock magnetic studies were carried out in order to identify the remanence carrying minerals and the domain state of magnetic grains in Lower/Middle Pleistocene marine sediments from the Wanganui Basin, southwestern North Island, New Zealand. Isothermal remanent magnetization (IRM) acquisition and stepwise thermal demagnetization of a three-axis composite IRM suggest that titanomagnetite (or titanomaghaemite) is the dominant remanence carrier in these sediments. Other rock magnetic data suggest that these grains occur in a range of sizes in the superparamagnetic to pseudo-single domain range, which helps account for the wide range of observed palaeomagnetic behaviour. Isolated occurrences of ferrimagnetic iron sulphides cannot be ruled out.

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Published date: 1993
Organisations: Ocean and Earth Science


Local EPrints ID: 66148
ISSN: 0094-8276
PURE UUID: 40f54880-fe54-46e7-9223-213d59519558

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Date deposited: 05 May 2009
Last modified: 19 Jul 2017 00:27

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Author: Andrew P. Roberts
Author: Brad J. Phillans

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