EarthRef.org Reference Database (ERR)
Development and Maintenance by the EarthRef.org Database Team

Detailed Reference Information
Williamson & Robertson 1976
Williamson, P. and Robertson, W.A. (1976). Iterative method of isolating primary and secondary components of remanent magnetization illustrated by using the Upper Devonian Catombal Group of Australia. Journal of Geophysical Research 81: doi: 10.1029/JB081i014p02531. issn: 0148-0227.

Directions of natural remanent magnetization from Upper Devonian Catombal Group red beds retain after magnetic cleaning a large secondary component acquired after the rocks were folded. A computer program was developed to eliminate progressively this 'hard' secondary component, which was found to lie along the present dipole field direction with an average intensity 1.6 times that of the primary component. It is interpreted to be due to weathering. The best estimate of primary direction was taken as the one in which the site mean directions, after removal of some secondary component and unfolding, gave minimum dispersion. The Upper Devonian field direction at Wellington derived from this procedure is (171¿-14¿), with A95=8¿. The southern hemisphere paleomagnetic pole (49¿S, 312¿1) obtained is not significantly different from the only published Australian pole position of Upper Devonian age, from the Lochiel Formation, at (58¿S, 320¿E).

DATABASE QUICK LINKS

MagIC Database

BACKGROUND DATA FILES

Abstract

MagIC SmartBook v1

Journal
Journal of Geophysical Research
http://www.agu.org/journals/jb/
Publisher
American Geophysical Union
2000 Florida Avenue N.W.
Washington, D.C. 20009-1277
USA
1-202-462-6900
1-202-328-0566
service@agu.org
Click to clear formClick to return to previous pageClick to submit