Computer Science
Scientific paper
Jun 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994e%26psl.124..139b&link_type=abstract
Earth and Planetary Science Letters, vol. 124, no. 1, p. 139-148
Computer Science
31
Basalt, Chemical Fractionation, Lunar Rocks, Magma, Meteoritic Composition, Osmium Isotopes, Rhenium Isotopes, Achondrites, Chondrites, Geochemistry, Oxygen
Scientific paper
This work reports the first Re-Os isotopic results for lunar basalts and eucrites. Both Re and Os concentrations are found to be very low and Re/Os ratios are close to chondritic. This contrasts with the much higher than chondritic Re/Os ratio of terrestrial basalts. Osmium displays a rather uniform solid/liquid fractionation in different planetary bodies (Moon, Earth, Eucrite Parent Body, Mars), whereas rhenium is about three orders of magnitude more incompatible in terrestrial basalt genesis. We argue that this is a function of oxygen fugacity in the source regions of basalts.
Allègre Claude J.
Birck Jean Louis
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