Other
Scientific paper
May 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980gecoa..44..711w&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 44, May 1980, p. 711-717.
Other
7
Carbonaceous Chondrites, Chemical Composition, Chemical Fractionation, Meteoritic Composition, Trace Elements, Abundance, Geochemistry, Minerals, Radiography, Temperature Effects, Meteorites, C2 Chondrites, Fractionation, Chemistry, Analysis, Data, Abundance, Volatilization, Elements, Chondrites, Formation, Matrix, Temperatures, Condensation, Boriskino Meteorite, Comparisons, Gases, Cold Bokkeveld Meteorite, Erakot Meteorite, Essebi Meteorite, Models, Haripura Meteorite, Santa Cruz Meteorite, Al Rais Meteor
Scientific paper
Measurements of the compositions of 20 trace elements in the representative C2 chondrites Boriskino, Cold Bokkeveld, Erakot, Essebi, Haripura, Santa Cruz and Al Rais are reported. The contents of Ag, Au, Bi, Cd, Cs, Ge, In, Ir, Ni, Os, Pd, Rb, Re, Sb, Se, Sn, Te, Tl, U, and Zn were determined by radiochemical neutron activation analysis. The siderophile abundances of the C2 chondrites are found to be less uniform than those of other carbonaceous chondrites, while the C2R chondrite Al Rais is systematically lower in 12 volatiles than the C2M chondrites. Enrichment of Bi and Tl found in Erakot and Haripura indicate the possible presence of the late condensate mysterite. Volatile abundances are shown to agree with matrix contents for meteorites that have suffered little aqueous alteration, however to be 20-30% lower for the more altered meteorites. Finally, the decline of element abundance with volatility is shown to be consistent with the sigmoid curve explained by the two-component model.
Anders Edward
Richter Gotthard
Wolf Robert
Woodrow A.
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