Mathematics – Logic
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992metic..27..596z&link_type=abstract
Meteoritics (ISSN 0026-1114), vol. 27, no. 5, p. 596-604.
Mathematics
Logic
10
Carbonaceous Chondrites, Geochemistry, Mineralogy, Petrology, Abundance, Concentration (Composition), Matrix Materials, Olivine, Photomicrography
Scientific paper
We have performed a detailed petrologic and mineralogic study of two chondritic clasts from the polymict eucrite Lewis Cliff (LEW) 85300, and performed chemical analyses by INAA and RNAA on one of these. Petrologically, the clasts are identified and are composed of dispersed aggregates, chondrules, and chondrule fragments supported by matrix. The aggregates and chondrules are composed of olivine, orthopyroxene, plus some diopside. The matrix consists of fine-grained olivine, and lesser orthopyroxene and augite. Fine-grained saponite is common in the matrix. The bulk major composition of the clast studied by INAA and RNAA shows unusual abundance patterns for lithophile, siderophile and chalcophile elements but is basically chondritic. The INAA/RNAA data preclude assignment of the LEW 85300,15 clast to any commonly accepted group of carbonaceous chondrite.
Hewins Roger H.
Lindström Markus
Lipschutz Michael E.
Mittlefehldt Dave W.
Xiao Xianbo
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