Terrestrial Ages of Antarctic Meteorites Based on the Thermoluminescence Levels Induced in the Fusion Crust

The fusion crust of eight Antarctic meteorite finds show natural thermoluminescence (TL) levels about 100 times higher than the levels in the fusion crust of freshly fallen meteorites, Dhajala, Jilin and Bansur. If it is assumed that this TL is due to cosmic ray received on the surface of Antarctica...

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Bibliographic Details
Main Authors: Sengupta,D., Bhandari,N., Watanabe,S.
Format: Article in Journal/Newspaper
Language:English
Published: Sociedade Brasileira de Física 1997
Subjects:
Antarctic
Antarc*
Antarctica
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97331997000300001
Description
Summary:The fusion crust of eight Antarctic meteorite finds show natural thermoluminescence (TL) levels about 100 times higher than the levels in the fusion crust of freshly fallen meteorites, Dhajala, Jilin and Bansur. If it is assumed that this TL is due to cosmic ray received on the surface of Antarctica, the terrestrial residence times of the meteorites is calculated to lie between 104 - 105 years. Strictly, these periods represent lower limits of terrestrial ages of these meteorites, and are generally consistent with terrestrial ages calculated from cosmogenic radionuclides

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