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), 839-842.

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Description/Abstract

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.

Item Type: Article
ISSNs: 0094-8276 (print)
Related URLs:
Subjects: Q Science > QE Geology
Divisions: University Structure - Pre August 2011 > School of Ocean & Earth Science (SOC/SOES)
ePrint ID: 66148
Date Deposited: 05 May 2009
Last Modified: 27 Mar 2014 18:47
URI: http://eprints.soton.ac.uk/id/eprint/66148

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