Asymmetric Distribution of Thermoluminescence in the Ucera Meteorite

Lost City Meteorite: Determination of the Temperature Gradient Induced by Atmospheric Friction Using Thermoluminescence

“…The results of the TL measurements performed in the Lost City meteorite are very similar to some of the results obtained by Vaz (1971) in the Ucera, Venezuela, meteorite. The Ucera meteorite is an olivine-bronzite chondrite type H5 (Clarke et al ., 1971), that fell within two weeks of Lost City.…”

“…3. This depth is also the maximum depth of penetration of temperatures above 120°C in the Ucera meteorite (Vaz, 1971).…”

“…The Ucera meteorite is an olivine-bronzite chondrite type H5 (Clarke et al ., 1971), that fell within two weeks of Lost City. Vaz (1971) has shown that there is an asymmetric distribution ofTL in the Ucera meteorite. It is not known if the TL distribution in Lost City is also asymmetric, because only a small bar was available for this study.…”

“…(I957), Liener and Geiss (I968), and Durrani et al (I 971). Studies of the TL distribution within a meteorite were published by Lalou et al (1970a), and Vaz (1971).…”

The thermoluminescence of meteorites: A brief 2010 perspective

“…For the bulk of the duration of exposure to cosmic radiation (~10 8 years), natural TL levels in meteorites stay close to equilibrium, being interrupted occasionally by stochastic events such as impact shock. Dose rate variations throughout the meteorite seem to cause relatively minor differences in equilibrium level (Sears, 1975a;Vaz, 1971;Lalou et al, 1970). This is because attenuation of the primary radiations is counter-balanced by build-up of secondary radiations.…”