A detailed palaeointensity and inclination record from drill core SOH1 on Hawaii

Details A detailed palaeointensity and inclination record from drill core SOH1 on Hawaii A detailed palaeointensity and inclination record from drill core SOH1 on Hawaii

Jul 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002pepi..131..101t&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 131, Issue 2, p. 101-140.

Physics

20

Scientific paper

A new record of absolute palaeointensity was obtained from drill core Scientific Observation Hole 1 (SOH1) on Kilauea volcano, Hawaii. Kilauea's high eruption rate resulted in a relatively continuous record and stratigraphic constraints preserved the chronological order. Three hundred and sixty samples were studied with the Thellier-Thellier technique, which gave 195 successful palaeointensity and 271 successful inclination determinations. Three geomagnetic excursions were observed, which exhibited intensity reductions of about 50%. Initial age control from K-Ar and Ar/Ar dating only constrained the total age between 20 and 120ka. The final age model was obtained by stretching the SOH1 record relative to other Hawaiian palaeomagnetic data. This gave an age range of 0-45ka for the flows and identified the excursions as the Hilina Pali, Mono Lake and Laschamp events. The SOH1 record of the Hilina Pali event is the most detailed ever, incorporating data from around 40 flows. This age model suggests that Kilauea had a burst of activity at the SOH1 site around 20ka. All available data was combined to form a composite record of palaeointensity and inclination on Hawaii for 0-45ka.

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