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THE CHEMICAL COMPOSITION OF KAINSAZ AND EFREMOVKA
Author(s) -
Ahrens L. H.,
Willis J. P.,
Erlank A. J.
Publication year - 1973
Publication title -
meteoritics
Language(s) - English
Resource type - Journals
eISSN - 1945-5100
pISSN - 0026-1114
DOI - 10.1111/j.1945-5100.1973.tb00148.x
Subject(s) - chondrite , meteorite , achondrite , chemical composition , mineralogy , geology , chemistry , analytical chemistry (journal) , astrobiology , environmental chemistry , physics , organic chemistry
The type III carbonaceous chondrites Kainsaz and Efremovka have been analysed for eighteen major, minor and trace elements by X‐ray fluorescence spectrometry. A comparison of the data on Kainsaz with four other Ornans sub‐type carbonaceous chondrites reveals a remarkable degree of constancy of composition. Efremovka, together with Leoville and Coolidge, may be distinguished from the other Vigarano sub‐type carbonaceous chondrites by their lower Na and K contents, variable Na/K ratios and relatively low Ca/Al ratios. Some observations are made on the ratio Na/K in various types of stony meteorite; the magnitude of the ratio in the basaltic achondrites appears to be more similar to that in the carbonaceous chondrites than in the ordinary chondrites.