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Chemical fractionations in meteorites. XI - C2 chondritesMeasurements 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.
Document ID
19800050022
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Wolf, R.
(Chicago Univ. Chicago, IL, United States)
Richter, G. R.
(Chicago Univ. Chicago, IL, United States)
Woodrow, A. B.
(Chicago Univ. Chicago, IL, United States)
Anders, E.
(Chicago, University Chicago, Ill., United States)
Date Acquired
August 10, 2013
Publication Date
May 1, 1980
Publication Information
Publication: Geochimica et Cosmochimica Acta
Volume: 44
Subject Category
Lunar And Planetary Exploration
Accession Number
80A34192
Funding Number(s)
CONTRACT_GRANT: NGL-14-001-167
Distribution Limits
Public
Copyright
Other

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