Mineralogy, petrology and chemistry of the Isna /C3/ meteorite

Details Mineralogy, petrology and chemistry of the Isna /C3/ meteorite Mineralogy, petrology and chemistry of the Isna /C3/ meteorite

Jun 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975metic..10..121m&link_type=abstract

Meteoritics, vol. 10, June 30, 1975, p. 121-130.

Computer Science

3

Chemical Analysis, Chondrites, Meteoritic Composition, Mineralogy, Petrology, Inclusions, Iron Meteorites, Olivine, Stony Meteorites

Scientific paper

A total chemical analysis of the Isna, Egypt, meteorite is similar to analyses for chondrites of type C3, Ornans sub-type; however, comparison with one group of chemical data indicates that Isna is intermediate between the C3(O)'s and C3(V)'s in terms of total Fe. On the basis of atom ratios of Fe, Ca, Al, and Ti to Si, Isna can also be placed into a chemical group which includes types C1 and C2, as well as C3(O). Thin sections show a variety of small, closely-packed chondrules, fragments, and aggregate-like masses in a poorly translucent matrix. Olivine + clinoenstatite inclusions rich in metal and troilite, and olivine-rich inclusions are abundant and show evidence of shock. Ca-Al-Ti-rich inclusions, of probable high-temperature origin, contain olivine, spinel, Ca-rich nepheline, gehlenite, diopside, augite, enstatite, and anorthite.

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