Literature DB >> 12215641

Lead isotopic ages of chondrules and calcium-aluminum-rich inclusions.

Yuri Amelin1, Alexander N Krot, Ian D Hutcheon, Alexander A Ulyanov.   

Abstract

The lead-lead isochron age of chondrules in the CR chondrite Acfer 059 is 4564.7 +/- 0.6 million years ago (Ma), whereas the lead isotopic age of calcium-aluminum-rich inclusions (CAIs) in the CV chondrite Efremovka is 4567.2 +/- 0.6 Ma. This gives an interval of 2.5 +/- 1.2 million years (My) between formation of the CV CAIs and the CR chondrules and indicates that CAI- and chondrule-forming events lasted for at least 1.3 My. This time interval is consistent with a 2- to 3-My age difference between CR CAIs and chondrules inferred from the differences in their initial 26Al/27Al ratios and supports the chronological significance of the 26Al-26Mg systematics.

Entities:  

Year:  2002        PMID： 12215641     DOI： 10.1126/science.1073950

Source DB:  PubMed          Journal:  Science        ISSN： 0036-8075            Impact factor:   47.728


  20 in total

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9.  Titanium isotope signatures of calcium-aluminum-rich inclusions from CV and CK chondrites: Implications for early Solar System reservoirs and mixing.

Authors:  Zachary A Torrano; Gregory A Brennecka; Curtis D Williams; Stephen J Romaniello; Vinai K Rai; Meenakshi Wadhwa
Journal:  Geochim Cosmochim Acta       Date:  2019-08-02       Impact factor: 5.010

10.  Extended chondrule formation intervals in distinct physicochemical environments: Evidence from Al-Mg isotope systematics of CR chondrite chondrules with unaltered plagioclase.

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Journal:  Geochim Cosmochim Acta       Date:  2019-06-22       Impact factor: 5.010
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