Microwave palaeointensity from the R3-N3 geomagnetic field reversal

Details Microwave palaeointensity from the R3-N3 geomagnetic field reversal Microwave palaeointensity from the R3-N3 geomagnetic field reversal

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006geoji.167...53b&link_type=abstract

Geophysical Journal International, Volume 167, Issue 1, pp. 53-69.

Astronomy and Astrophysics

Astronomy

4

Geomagnetic Field, Iceland, Microwave, Palaeointensity, Reversals

Scientific paper

The microwave palaeointensity technique has been used to determine palaeointensity during the R3-N3 geomagnetic field reversal, using lavas from the Esja region of southwestern Iceland. The resulting intensity determinations have been compared to two previous studies which used the Shaw and Thellier techniques. Both reported low field intensities during the reversal except for four flows that produced high values (20.4-36.8 μT) using the Shaw technique compared to a single maximum intermediate value of 15.9 μT using the Thellier method. In this paper, an average microwave transitional palaeointensity of 6.95 +/- 2.07 μT is found for samples used in the Shaw technique study, and of 7.80 +/- 1.61 μT for samples used in the Thellier study, demonstrating that there is no evidence for strong fields during this reversal.

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