Pyroxenes of ordinary H-group and L-group chondrites

Details Pyroxenes of ordinary H-group and L-group chondrites Pyroxenes of ordinary H-group and L-group chondrites

Jan 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985geokh....r...3b&link_type=abstract

Geokhimiia (ISSN 0016-7525), Jan. 1985, p. 3-19. In Russian.

Mathematics

Logic

Chondrites, Meteoritic Composition, Microanalysis, Mineralogy, Pyroxenes, Calcium, Crystallography, Histograms, Iron, Magnesium

Scientific paper

A detailed mineralogical and microprobe analysis of eight H-group and L-group chondrites of various petrological types is presented. On the basis of the composition and structural characteristics of the chondrites, three main pyroxene phases were identified: (1) orthopyroxenes (2) low-Ca clinopyroxenes; and (3) high-Ca pyroxenes composed of diopside-augile material. The interrelationships between the different pyroxene phases and the chondrite types are discussed in detail. Partition ratios between Fe(+) and Mg are estimated for coexisting orto- and clinopyroxene phases in the chondrites, and the equilibration temperatures were calculated. On the basis of the experimental results, some possible candidates for chondrite parent bodies are identified.

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