On correction of loss of mass during Thellier experiments

Details On correction of loss of mass during Thellier experiments On correction of loss of mass during Thellier experiments

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003pepi..135..225s&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 135, Issue 4, p. 225-229.

Physics

3

Scientific paper

Determination of geomagnetic paleointensity by the Thellier method compares the decay of natural remanent magnetisation with the gain of a laboratory induced thermoremanent magnetisation. If fragile samples lose some amount of their material after each heating step, the Thellier experiment will be systematically disturbed and paleointensity will be over-estimated. For a lost of 5% of the sample's mass an over-estimate of 10% in paleointensity is observed. This can easily be corrected by a normalisation to the initial mass of the unheated sample. This is necessary for any fragile materials such as baked clays or when a specimen breaks into pieces during the Thellier experiment.

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