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Tanaka & Kono 1991

Tanaka, H. and Kono, M. (1991). Preliminary Results and Reliability of Palaeointensity Studies on Historical and 14C Dated Hawaiian Lavas. Journal of Geomagnetism and Geoelectricity 43(5): 375-388. doi: 10.5636/jgg.43.375.

Palaeointensity determinations, using Coe's version of the Thellier method, for 7 flows on Hawaii are used to illustrate some of the problems in palaeointensity determinations by this method. It is shown that the linearity of NRM-TRM is not an adequate criterion for acceptance, but that it is very powerful when combined with the PTRM test. Examples are given of the effect of chemical changes during heating, viscous remanence and the use of low field susceptibility measurements. The importance of multiple determinations from different samples from the same site is also demonstrated. The within site dispersion is some 10% although it is hoped to reduce this to 3%.

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Keywords
earths magnetic-field, geomagnetic paleointensities, thelliers method, flows, intensity, basalt

Journal
Journal of Geomagnetism and Geoelectricity
http://www.terrapub.co.jp/journals/EPS/JGG/

Publisher
Terra Scientific Publishing Co., Tokyo
5-27-19 Okusawa
Setagaya-ku, Tokyo 158-0083
Japan
+81-3-3781-7500
+81-3-3718-4406
gj@ess.sci.osaka-u.ac.jp