Some complexities in the determination of lunar paleointensities

Details Some complexities in the determination of lunar paleointensities Some complexities in the determination of lunar paleointensities

Apr 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976lpsc....7.3271p&link_type=abstract

In: Lunar Science Conference, 7th, Houston, Tex., March 15-19, 1976, Proceedings. Volume 3. (A77-34651 15-91) New York, Pergamon

Physics

9

Field Strength, Lunar Evolution, Lunar Magnetic Fields, Paleomagnetism, Ilmenite, Magnetization, Photomicrographs, Remanence, Troilite

Scientific paper

Application of a variant of the Thellier-Thellier method for paleomagnetic field intensity determination to an analog lunar sample revealed a peak at about 250 C on the partial thermoremanent magnetization (PTRM). Evidence suggests that this can be best explained by a partial self-reversal involving troilite becoming reversely magnetized in the presence of already magnetized intergrown iron. In lunar samples, an additional peak was observed. The results suggest that natural remanent magnetization of lunar samples is in part carried by interacting grains, so that paleointensity determinations on the basis of the assumption of noninteracting grains have to be discarded.

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