Weathering model in paleomagnetic field intensity measurements on ancient fired clays

Details Weathering model in paleomagnetic field intensity measurements on ancient fired clays Weathering model in paleomagnetic field intensity measurements on ancient fired clays

May 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978pepi...16p..15s&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 16, Issue 4, p. P15-P19.

Physics

2

Scientific paper

Nonlinearities observed in Thellier's plots are explained in terms of a weathering model. This model is based on the reduction in size of the originally present iron oxide particles, due to leaching. In the general case, the slope of the Thellier's plot is a function of the particle-size distributions of the magnetic particles, both newly formed and leached ones. In the special case in which the newly formed magnetic particles are superparamagnetic, the limiting value of the slope of the Thellier's plot towards the magnetic ordering temperature is equal to the ratio of the ancient field intensity to the modern one.

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