The use of Auger spectroscopy for the in situ elemental characterization of sub-micrometer presolar grains

Frank J. Stadermann, Christine Floss, Maitrayee Bose, A. Scott Lea

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Presolar grains are small samples of Stardust that can be found at low abundances in some of the most unaltered types of extraterrestrial materials. While earlier laboratory studies of Stardust mainly focused on grain types that can be extracted from bulk meteorites by acid dissolution techniques, such as silicon carbide and graphite, recent analyses of presolar silicates rely on isotope imaging searches for locating these grains in situ. Since presolar silicates are generally less than a micrometer in diameter and represent at best only a few hundred ppm of their host materials (e.g., primitive meteorites or interplanetary dust particles), locating and studying these particles can be analytically challenging. Recently, we began using scanning Auger spectroscopy for the in situ elemental characterization of presolar silicate grains as a complement to NanoSlMS isotopic studies for obtaining spatially matched compositional data. Auger spectroscopy is a well-established analytical technique for elemental characterizations in the material sciences, but has not been widely used in geological applications. We discuss the application of this technique to sub-micrometer sized silicate grains and address practical issues such as sample preparation, measurement settings, spatial resolution, data processing, and elemental quantification.

Original languageEnglish (US)
Pages (from-to)1033-1049
Number of pages17
JournalMeteoritics and Planetary Science
Volume44
Issue number7
DOIs
StatePublished - Jul 1 2009
Externally publishedYes

Fingerprint

Auger spectroscopy
micrometers
silicate
spectroscopy
silicates
meteorite
meteorites
interplanetary dust
sample preparation
graphite
silicon
analytical method
materials science
spatial resolution
silicon carbides
complement
dissolution
isotope
dissolving
isotopes

ASJC Scopus subject areas

  • Geophysics
  • Space and Planetary Science

Cite this

The use of Auger spectroscopy for the in situ elemental characterization of sub-micrometer presolar grains. / Stadermann, Frank J.; Floss, Christine; Bose, Maitrayee; Lea, A. Scott.

In: Meteoritics and Planetary Science, Vol. 44, No. 7, 01.07.2009, p. 1033-1049.

Research output: Contribution to journalArticle

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