Mineralogy of interplanetary dust particles from the "olivine" infrared class

Roy Christoffersen, P R Buseck

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Analytical electron microscopy observations establish that olivine is abundant and the predominant silicate phase in three interplanetary dust particles (IDPs) from the "olivine" infrared spectral category. Two of the particles have microstructures resembling those of most non-hydrous chondritic IDPs, consisting of micron to sub-micron grains together with a matrix composed of amorphous carbonaceous material and sub-500 Å grains. In addition to olivine these particles respectively contain enstatite and magnetite, and pentlandite plus Ca-rich clinopyroxene. The third IDP consists mostly of olivine and pyrrhotite with little or no matrix material. Olivine grains in this particle contain prominent solar-flare ion tracks with densities corresponding to a space-exposure age between 103 to 105 years. Although the three particles have olivine-rich mineralogies in common, other aspects of their mineralogies and microstructures suggest that they experienced different formation histories. The differences between the particles indicate that the olivine infrared spectral category is a diverse collection of IDPs that probably incorporates several genetic groups.

Original languageEnglish (US)
Pages (from-to)53-66
Number of pages14
JournalEarth and Planetary Science Letters
Volume78
Issue number1
DOIs
StatePublished - 1986

Fingerprint

interplanetary dust
Mineralogy
mineralogy
olivine
Particles (particulate matter)
Dust
Infrared radiation
Ferrosoferric Oxide
microstructure
Silicates
Microstructure
particle
carbonaceous materials
enstatite
pentlandite
pyrrhotite
matrix materials
matrix
Electron microscopy
solar flares

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)
  • Geochemistry and Petrology
  • Geophysics
  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

Mineralogy of interplanetary dust particles from the "olivine" infrared class. / Christoffersen, Roy; Buseck, P R.

In: Earth and Planetary Science Letters, Vol. 78, No. 1, 1986, p. 53-66.

Research output: Contribution to journalArticle

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