Exposure and terrestrial ages of four Allan Hills Antarctic meteorites

Journal Article · Sun Dec 31 04:00:00 EST 1978 · Meteoritics; (United States)

OSTI ID:6024246

Kirsten, T ^[1]; Ries, D ^[2]

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1. Max-Planck-Institut fuer Kernphysik, Heidelberg, West Germany
2. Smithsonian Astrophysical Observatory, Cambridge, Mass.

Terrestrial ages of meteorites are based on the amount of cosmic-ray-produced radioactivity in the sample and the number of observed falls that have similar cosmic-ray exposure histories. The cosmic-ray exposures are obtained from the stable noble gas isotopes. Noble gas isotopes are measured by high-sensitivity mass spectrometry. In the present study, the noble gas contents were measured in four Allan Hill meteorites (No. 5, No. 6, No. 7, and No. 8), whose C-14, Al-26, and Mn-53 radioactivities are known. These meteorites are of particular interest because they belong to a large assemblage of distinct meteorites that lie exposed on a small (110 sq km) area of ice near the Allan Hills.

• OSTI ID: 6024246
• Report Number(s): CONF-7808131-
• Journal Information: Meteoritics; (United States), Journal Name: Meteoritics; (United States) Vol. 13; ISSN MERTA
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580100* -- Geology & Hydrology-- (-1989)
AGE ESTIMATION
ALUMINIUM 26
ALUMINIUM ISOTOPES
ARGON ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CARBON 14
CARBON ISOTOPES
CHEMICAL COMPOSITION
COSMIC RADIATION
ELEMENTS
EVEN-EVEN NUCLEI
FLUIDS
GASES
HELIUM ISOTOPES
IONIZING RADIATIONS
ISOTOPE RATIO
ISOTOPES
LIGHT NUCLEI
MANGANESE ISOTOPES
METEORITES
NEON ISOTOPES
NONMETALS
NUCLEI
ODD-ODD NUCLEI
RADIATIONS
RADIOACTIVITY
RADIOISOTOPES
RARE GASES
SECONDS LIVING RADIOISOTOPES
YEARS LIVING RADIOISOTOPES