Compositional evolution of the protoplanetary disk: Oxygen isotopes of type-II chondrules from CR2 chondrites

Harold C. Connolly, Gary R. Huss

Research output: Contribution to journalArticlepeer-review

62 Scopus citations

Abstract

Chondrules are the dominant component of chondritic meteorites and attest to high-temperature transient heating events within the protoplanetary disk. They provide valuable constraint on the disk environments in which they formed and potentially the evolution of primitive planetary materials in the disk. The oxygen isotopic composition of CR2 chondrite type-II chondrules was investigated. Our data show significant variation in the isotopic compositions of the chondrules with no petrographic or geochemical means to identify what chondrule will plot where on a three-isotope diagram. Although we cannot rule out that these chondrules may have come from another chondrite-forming region, we argue in context of type-I chondrules from CR2 chondrites that CR2 type-II chondrules record changes in solid and gas composition during formation due to the vaporization of icy bodies in localized regions of the inner disk.

Original languageEnglish (US)
Pages (from-to)2473-2483
Number of pages11
JournalGeochimica et Cosmochimica Acta
Volume74
Issue number8
DOIs
StatePublished - Apr 15 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology

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