The application of acceptance criteria to results of Thellier palaeointensity experiments performed on samples with pseudo-single-domain-like characteristics

Details The application of acceptance criteria to results of Thellier palaeointensity experiments performed on samples with pseudo-single-domain-like characteristics The application of acceptance criteria to results of Thellier palaeointensity experiments performed on samples with pseudo-single-domain-like characteristics

Aug 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003pepi..138..279b&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 138, Issue 3-4, p. 279-287.

Physics

20

Scientific paper

The results of a simulated Thellier palaeointensity experiment show that the low temperature portion of Arai plots produced by samples with pseudo-single-domain (PSD)-like hysteresis properties can produce significant inaccuracies despite passing conventional acceptance criteria. Furthermore, full Arai plots which fail these criteria can still produce reasonably accurate results. The evidence presented suggests that during a palaeointensity experiment: pTRM checks can fail despite no alteration occurring, pTRM tail checks are not reliable as indicators of MD-like behaviour, room temperature susceptibility monitoring is unreliable for detecting alteration, and that the minimum requirement for the f (fraction)-value should be increased from 0.15 to at least 0.5.

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