The origin and history of ordinary chondrites: A study by iron isotope measurements of metal grains from ordinary chondrites

Theis, K J; Burgess, R.; Lyon, I. C.; Sears, D. W. G.

doi:10.1016/j.gca.2008.05.057

Cited by 13 publications

(15 citation statements)

References 73 publications

(120 reference statements)

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“…The Fe isotopic variations observed here between different chips of the same ordinary chondrites are as large as the Fe isotopic variation previously observed between different bulk ordinary chondrites (Theis et al. ; Needham et al. ).…”

Section: Resultssupporting

confidence: 68%

See 1 more Smart Citation

Homogeneous distribution of Fe isotopes in the early solar nebula

Wang

Moynier

Barrat

et al. 2013

Meteorit & Planetary Scien

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Abstract-To examine the iron (Fe) isotopic heterogeneities of CI and ordinary chondrites, we have analyzed several large chips (approximately 1 g) from three CI chondrites and three ordinary chondrites (LL5, L5, and H5). The Fe isotope compositions of five different samples of Orgueil, one from Ivuna and one from Alais (CI chondrites), are highly homogeneous. This new dataset provides a d 56Fe average of 0.02 AE 0.04& (2SE, n = 7), which represents the best available value for the Fe isotopic composition of CI chondrites and probably the best estimate of the bulk solar system. We conclude that the homogeneity of CI chondrites reflects the initial Fe isotopic homogeneity of the well-mixed solar nebula. In contrast, larger (up to 0.26& in d 56 Fe) isotopic variations have been found between separate approximately 1 g pieces of the same ordinary chondrite sample. The Fe isotope heterogeneities in ordinary chondrites appear to be controlled by the abundances of chondritic components, specifically chondrules, whose Fe isotope compositions have been fractionated by evaporation and recondensation during multiple heating events.

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Section: Resultssupporting

confidence: 68%

“…Metals in chondrites are generally enriched in the heavier Fe isotopes (Theis et al. ; Needham et al. ; Okabayashi et al.…”

Section: Discussionmentioning

confidence: 99%

Homogeneous distribution of Fe isotopes in the early solar nebula

Wang

Moynier

Barrat

et al. 2013

Meteorit & Planetary Scien

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show abstract

“…However, the Fe isotope composition of chondritic metal is generally heavier in higher petrologic type samples i.e. may be related to metamorphism on the parent body; this relationship was also observed by Theis et al (2008). The Fe isotope composition of the Fe, Ni metal grain recovered from one of the least equilibrated chondrites analysed (L3.2 LEW 86018) is 0.03&, i.e.…”

Section: Metalmentioning

confidence: 59%

An Fe isotope study of ordinary chondrites

Needham

Porcelli

Russell

2009

Geochimica et Cosmochimica Acta

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“…Overall, these elements show remarkably consistent isotopic compositions within bulk OCs (Zhu et al, 2001;Kehm et al, 2003;Poitrasson et al, 2005;Fitoussi et al, 2007;Georg et al, 2007;Theis et al, 2008;Moynier et al, 2007a;Wiechert and Halliday, 2007). This indicates that Mg, Si, Fe and Ni do not mimic the behaviour of Ag isotopes in ordinary chondrites.…”

Section: Mechanisms Of Stable Silver Isotope Fractionation In Ordinarmentioning

confidence: 87%