Matrix mineralogy of the Orgueil CI carbonaceous chondrite

Details Matrix mineralogy of the Orgueil CI carbonaceous chondrite Matrix mineralogy of the Orgueil CI carbonaceous chondrite

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988gecoa..52.1627t&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 52, June 1988, p. 1627-1640.

Computer Science

64

Carbonaceous Chondrites, Meteoritic Composition, Mineralogy, Orgueil Meteorite, Petrography, Electron Microscopy, Iron, Magnesium, Serpentine

Scientific paper

This paper presents the results of petrographic, SEM, and TEM studies of the matrix minerals in Orgueil. It was found that the matrix consists mainly of Fe-bearing Mg-rich serpentine and saponite, and a poorly crystallized Fe-rich ferrihydrite containing small and varying amounts of S and Ni. The serpentine and saponite, which occur in roughly equal molar proportions, are coherently intergrown and occur mainly in fine phyllosilicates in intimate association with the ferrihydrite. Coarse phylosilicates occur in clusters relatively free of ferrihydrite. The matrix mineralogy of the Orgueil chondrite suggests that Orgueil experienced considerably different alteration conditions than did the CM chondrites.

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