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Lumb et al. 1973

Lumb, J.T., Woodward, D.J. and Hochstein, M.P. (1973). Interpretation of Magnetic Measurements in the Cook Islands, South-west Pacific Ocean. In: The Western Pacific: island arcs, marginal seas, geochemistry. University of Western Australia Press, Nedlands. 79-101.

Total force magnetic anomalies around several of the Cook Islands are fairly simple and bi-polar in form. A group of islands situated on a NW-SE trending ridge exhibit a more complex anomaly pattern which, in part, must have its source beneath the ridge. The virtual paleomagnetic poles of islands belonging to the first group, and which were calculated from the best fit magnetization, show a large scatter. It is shown that this scatter is most likely to be caused by an inhomogeneous magnetization of the islands brought about by a sequence of normally and reversely magnetized layers. In this case the direction of the best fit magnetization is not representative of that of the mean remanent magnetization and the interpretation of the position of the virtual paleomagnetic pole in terms of the paleomagnetic history of a volcanic island is not justified.

BACKGROUND DATA FILES

	Abstract
	Abstract

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	Magnetic Measurements

Keywords
anomalies; Cook Islands; geophysical methods; geophysical surveys;, interpretation; magnetic methods; magnetization; Mesozoic;, Oceania; Pacific Ocean; paleomagnetism; pole positions; Polynesia;, remanent magnetization; reversals; southwest; surveys, 18, Solid-earth geophysics