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Carbon, Oxygen, Silicon, Sulphur, Calcium, and Iron Determinations in Twenty‐four Dark Clasts and One Dark Inclusion of the Allende Meteorite by 12 C(d,p) 13 C Nuclear Reaction and PIXE
Author(s) -
Heymann D.,
Makjanic J.,
Stap C. C. A. H.,
Vis R. D.,
Verheul H.
Publication year - 1988
Publication title -
meteoritics
Language(s) - English
Resource type - Journals
eISSN - 1945-5100
pISSN - 0026-1114
DOI - 10.1111/j.1945-5100.1988.tb00908.x
Subject(s) - allende meteorite , meteorite , inclusion (mineral) , carbon fibers , chondrite , chemistry , analytical chemistry (journal) , mineralogy , astrobiology , materials science , physics , environmental chemistry , composite material , composite number
— A study of carbon contents of millimeter‐sized dark clasts and of one dark inclusion of the Allende meteorite with the 13 C(d,P 0 ) 13 C method has been undertaken. The results show that C in dark Allende areas varies, perhaps in a “clustered” fashion, from near 0.3%, which is essentially the bulk C‐content of the meteorite, to at least 2.1% in the dark rim of a dark inclusion. At least one cluster has now been identified with C‐contents in the range 0.4%‐0.5%. Raman spectra of C in the dark inclusion ADIR 4E1‐fu and in matrix have also been determined. These are identical. Our results are consistent with a comparatively low temperature origin of essentially all elemental carbon in Allende.