EVALUATION OF 26AL/27AL AT CRYSTALLIZATION IN EFREMOVKA CAIS BY HIGH-PRECISION, IN SITU ION MICROPROBE ANALYSES

dc.contributor.author	McKeegan K.D.
dc.contributor.author	Taylor D.J.
dc.contributor.author	Krot A.N.
dc.contributor.author	Sahijpal S.
dc.contributor.author	Ulyanov A.A.
dc.date.accessioned	2022-09-28T05:54:15Z
dc.date.available	2022-09-28T05:54:15Z
dc.date.issued	2004
dc.identifier	https://elibrary.ru/item.asp?id=13463095
dc.identifier.citation	Meteoritics and Planetary Science, 2004, 39, Suppl., 39
dc.identifier.issn	1086-9379
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/38810
dc.description.abstract	Estimates of the initial “canonical” (~5 10 -5) value of 26Al/27Al in the solar nebula are based primarily on ion microprobe analyses of high Al/Mg phases in CAIs. Some of these minerals (e.g., plagioclase, melilite) are known to be susceptible to alteration and sub-solidus isotopic mobility. Recent high-precision analyses by ICPMS have uncovered evidence for apparently higher (>7 10-5) initial 26Al/ 27Al values characteristic of bulk CAIs [3] or of more magnesian mineral phases in coarse-grained CAIs [4]. These data can be interpreted as indicating an appreciable temporal gap between initial Al/Mg fractionation during formation of proto-CAIs and subsequent melting/crystallization.
dc.title	EVALUATION OF 26AL/27AL AT CRYSTALLIZATION IN EFREMOVKA CAIS BY HIGH-PRECISION, IN SITU ION MICROPROBE ANALYSES
dc.type	Статья

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