Noble gases, cosmic ray exposure ages and pairing of H3-chondrites from the Sahara

Details Noble gases, cosmic ray exposure ages and pairing of H3-chondrites from the Sahara Noble gases, cosmic ray exposure ages and pairing of H3-chondrites from the Sahara

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28.1251s&link_type=abstract

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 251.

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Chondrites, Rare Gases, Cosmic Rays, Meteoritic Composition, Petrography, Chronology, Sahara Desert (Africa)

Scientific paper

Thirty-eight Saharan H3-chondrites have been studied to compare their distribution of cosmic ray exposure ages with that of H-chondrite falls and finds. Another aspect considered is to solve the pairing problem for these hot desert samples with the help of characteristic noble gas signatures like solar gas contribution, radiogenic He-4 and Ar-40, cosmogenic nuclides, and deficits of He-3. We present new noble gas data for 26 H3-chondrites and data for 12 H3-chondrites taken from the literature. This covers all currently known meteorites of this type from the Sahara. Furthermore, we provide suggestions for paired specimens taking into consideration noble gas data, petrographic-chemical classifications, weathering grades, shock classifications, and find locations of the meteorites.

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