Ar-40/Ar-39 analyses of Orvinio (H6) - Further lessons on incomplete degassing of impact melt breccias

Details Ar-40/Ar-39 analyses of Orvinio (H6) - Further lessons on incomplete degassing of impact melt breccias Ar-40/Ar-39 analyses of Orvinio (H6) - Further lessons on incomplete degassing of impact melt breccias

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28..467g&link_type=abstract

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 467.

Computer Science

Breccia, Argon Isotopes, Hypervelocity Impact, Chondrites, Temperature Distribution, Melting, Chronology, Meteoritic Composition

Scientific paper

Orvinio is a classic impact melt breccia which was previously listed as an L-chondrite but is actually an H-chondrite whose thermal history needs to be reinterpreted in this context. The authors obtained a new specimen of Orvinio and analyzed individual relic clasts and impact melt matrix samples in an attempt to provide improved Ar-40/Ar-39 age data, and perhaps eliminate the ambiguity in the thermal history of the meteorite. This study hopes to reach a better understanding of the use and interpretation of chondritic impact melt argon profiles, and of the history of the H-chondrite parent body or bodies.

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