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Rochechouart meteorite crater - Identification of projectileTen samples from the 20-km Rochechouart crater in France have been analyzed for the siderophile elements Ir, Os, Re, Au, Pd, Ni, and Ge by radiochemical neutron activation analysis. The up to 1000-fold enrichment of siderophiles correlates with shock effects, increasing in the following order from least to greatest: basement rocks, glass-free breccias, glassy breccias, impact melts. The abundance pattern of the meteorite was determined from interelement correlations. Several samples fell off the correlation lines, presumably due to recrystallization and weathering of impact glasses during the approximately 165-m.y. age of the crater. The most reliable diagnostic elements were Os, Ir, Ni, and Pd; their abundance ratios suggest that the Rochechouart meteorite was a IIA iron.
Document ID
19770041329
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Janssens, M.-J.
(Bureau de Recherches Geologiques et Minieres Orleans, France)
Hertogen, J.
(Bureau de Recherches Geologiques et Minieres Orleans, France)
Takahashi, H.
(Bureau de Recherches Geologiques et Minieres Orleans, France)
Anders, E.
(Chicago, University Chicago, Ill., United States)
Lambert, P.
(Bureau de Recherches Geologiques et Minieres Orleans, France)
Date Acquired
August 8, 2013
Publication Date
February 10, 1977
Publication Information
Publication: Journal of Geophysical Research
Volume: 82
Subject Category
Lunar And Planetary Exploration
Accession Number
77A24181
Funding Number(s)
CONTRACT_GRANT: NGL-14-001-167
Distribution Limits
Public
Copyright
Other

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