Other
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20..839r&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 9, p. 839-842.
Other
12
Magnetization, Ocean Bottom, Remanence, Rocks, Sediments, Demagnetization, Hysteresis, New Zealand, Structural Basins, Sulfides
Scientific paper
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 pseudosingle domain range, which helps account for the wide range of observed palaeomagnetic behavior. Isolated occurrences of ferrimagnetic iron sulphides cannot be ruled out.
Pillans Brad J.
Roberts Andrew P.
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