Thermoluminescence studies on Jilin meteorite

Details Thermoluminescence studies on Jilin meteorite Thermoluminescence studies on Jilin meteorite

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985e%26psl..72..304w&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 72, no. 2-3, Feb. 1985, p. 304-306.

Physics

4

Aerodynamic Heating, Geochronology, Meteoroids, Temperature Effects, Thermoluminescence, Atmospheric Entry, Crusts, Fusion (Melting), Radiation Effects, Temperature Gradients, Meteorites, Jilin, H5 Chondrites, Stone Meteorites, Samples, Meteorite, Thermoluminescence, Depth, Fusion Crust?, Thermal Effects, Gradients, Temperature, Calculations

Scientific paper

The thermoluminescence (TL) of Jilin meteorite was measured as a function of depth (up to 21.7 mm) below the fusion crust using the 50-100 micron size fraction. Up to 6 mm depth, the natural TL increases steeply due to thermal draining during atmospheric passage resulting in a temperature gradient of 45 C/mm. Below 7 mm depth, a constant natural TL signal is observed corresponding to an equivalent dose of 3300 Gy. This quantity represents a lower limit for the total natural dose received by the meteorite. Assuming a dose rate of 0.1 Gy/a a minimum age of 33,000 years is calculated for the last thermal event (less than 320 deg, few seconds) affecting the Jilin meteorite (i.e. greater than 7 cm below the fusion crust).

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