Thermoluminescence survey of 12 meteorites collected by the European 1988 Antarctic meteorite expedition to Allan Hills and the importance of acid washing for thermoluminescence sensitivity measurements

Journal Article · Sat Jun 01 04:00:00 EDT 1991 · Meteoritics; (United States)

DOI:https://doi.org/10.1111/j.1945-5100.1991.tb01032.x· OSTI ID:5260296

Benoit, P H; Sears, H; Sears, D W.G. ^[1]

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1. Arkansas, University, Fayetteville (USA)

Natural and induced thermoluminescence (TL) data are reported for 12 meteorites recovered from the Allan Hills region of Antarctica by the European field party during the 1988/1989 field season. The samples include one with extremely high natural TL, ALH88035, suggestive of exposure to unusually high radiation doses (i.e., low degrees of shielding), and one, ALH88034, whose low natural TL suggests reheating within the last 100,000 years. The remainder have natural TL values suggestive of terrestrial ages similar to those of other meteorites from Allan Hills. ALH88015 (L6) has induced TL data suggestive of intense shock. TL sensitivities of these meteorites are generally lower than observed falls of their petrologic types, as is also observed for Antarctic meteorites in general. Acid-washing experiments indicate that this is solely the result of terrestrial weathering rather than a nonterrestrial Antarctic-non-Antarctic difference. However, other TL parameters, such as natural TL and induced peak temperature-width, are unchanged by acid washing and are sensitive indicators of a meteorite's metamorphic and recent radiation history. 16 refs.

• OSTI ID: 5260296
• Journal Information: Meteoritics; (United States), Journal Name: Meteoritics; (United States) Vol. 26; ISSN 0026-1114; ISSN MERTA
• Country of Publication: United States
• Language: English

Related Subjects

640107* -- Astrophysics & Cosmology-- Planetary Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANTARCTIC REGIONS
CHEMICAL COMPOSITION
ELECTROMAGNETIC RADIATION
LUMINESCENCE
METAMORPHISM
METEORITES
POLAR REGIONS
RADIATIONS
SOLAR SYSTEM EVOLUTION
THERMAL RADIATION
THERMOLUMINESCENCE
WEATHERING