Oxide-bearing and FeO-rich clasts in aubrites

E. B. Rosenshein, M. A. Ivanova, T. L. Dickinson, T. J. McCoy, D. S. Lauretta, Y. Guan, L. A. Leshin, G. K. Benedix

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

We report the occurrence of an oxide-bearing clast and an FeO-rich clast from aubrites. The FeO-rich clast in Pesyanoe is dominated by olivine and pyroxene phenocrysts with mineral compositions slightly less FeO-rich than is typical for H chondrites. In Allan Hills (ALH) 84008, the oxide-bearing clast consists of a single forsterite grain rimmed by an array of sulfides, oxides, and phosphides. We consider a number of possible origins. We can exclude formation by melting of oxide-bearing chondrules and CAIs formed in enstatite chondrites. The Pesyanoe clast may have formed in a more oxidized region of the aubrite parent body or, more likely, is a foreign clast from a more oxidized parent body. The ALH 84008 clast likely formed by reaction between sulfides and silicates as a result of cooling, oxidation, or de-sulfidization. This clast appears to be the first oxide-bearing clast from an aubritic breccia that formed on the aubrite parent body. Identification of additional oxide-bearing clasts in aubrites could shed light on whether this was a widespread phenomenon and the origin of these enigmatic objects.

Original languageEnglish (US)
Pages (from-to)495-503
Number of pages9
JournalMeteoritics and Planetary Science
Volume41
Issue number4
DOIs
StatePublished - Apr 2006

ASJC Scopus subject areas

  • Geophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'Oxide-bearing and FeO-rich clasts in aubrites'. Together they form a unique fingerprint.

  • Cite this

    Rosenshein, E. B., Ivanova, M. A., Dickinson, T. L., McCoy, T. J., Lauretta, D. S., Guan, Y., Leshin, L. A., & Benedix, G. K. (2006). Oxide-bearing and FeO-rich clasts in aubrites. Meteoritics and Planetary Science, 41(4), 495-503. https://doi.org/10.1111/j.1945-5100.2006.tb00477.x