Premium
Chromium isotopic anomalies in Allende Refractory Inclusions
Author(s) -
Birck JeanLouis,
Allègre Claude J.
Publication year - 1984
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl011i010p00943
Subject(s) - allende meteorite , isotope , chromium , fractionation , nickel , refractory (planetary science) , geology , mineralogy , analytical chemistry (journal) , geochemistry , meteorite , chondrite , radiochemistry , astrobiology , chemistry , materials science , environmental chemistry , metallurgy , physics , nuclear physics , organic chemistry
Measurements of both 53 Cr/ 52 Cr and 54 Cr/ 52 Cr ratios with a precision of 10 −4 in Allende inclusions display widespread chromium isotopic anomalies which are in the range of 5• 10 −4 . Instrumental mass fractionation precludes specific identification of the affected isotopes, but there are strong arguments favoring excesses in 54 Cr and a hint of a very small deficit in 53 Cr (≃ 10 −4 ). These samples also display excesses in 50 Ti and no significant effect in nickel isotopes.