Four Antarctic ureilites - Petrology and observations on ureilite petrogenisis

Details Four Antarctic ureilites - Petrology and observations on ureilite petrogenisis Four Antarctic ureilites - Petrology and observations on ureilite petrogenisis

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986metic..21..169b&link_type=abstract

Meteoritics (ISSN 0026-1114), vol. 21, June 30, 1986, p. 169-189.

Computer Science

23

Meteoritic Composition, Mineralogy, Petrology, Ureilites, Antarctic Regions, Graphite, Metallography, Olivine, Pyroxenes, Silicates

Scientific paper

New data are presented on the petrography and mineral compositions of four recently recovered Antarctic ureilites: Yamato-790981, RKPA80239, ALHA81101, and PCA82506. Thin polished sections of the ureilites were analyzed by polarized and reflected light microscopy, and by electron microprobe. The low shock characteristics of most (with the exception of the ALHA81101) Antarctic ureilites have afforded excellent opportunities for understanding the petrographic relationships between graphite and silicate minerals in ureilites. New speculations concerning the petrogenesis of ureilites are offered.

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