THE ORIGIN OF CHROMITIC CHONDRULES AND THE VOLATILITY OF CR UNDER A RANGE OF NEBULAR CONDITIONS

dc.contributor.author	Krot A.
dc.contributor.author	Wasson J.T.
dc.contributor.author	Ivanova M.A.
dc.date.accessioned	2020-11-10T07:17:45Z
dc.date.available	2020-11-10T07:17:45Z
dc.date.issued	1993
dc.identifier	https://elibrary.ru/item.asp?id=31080192
dc.identifier.citation	Earth and Planetary Science Letters, 1993, , 4, 569-584
dc.identifier.issn	0012-821X
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/18882
dc.description.abstract	We characterize ten chromitic chondrules, two spinelian chondrules and one spinel-bearing chondrule and summarize data for 120 chromitic inclusions discovered in an extensive survey of ordinary chondrites. Compositional and petrographic evidence suggests that chromitic chondrules and inclusions are closely related. TheCr/(Cr + Al) ratios in the spinel of these objects range from 0.5 to 0.9 and bulk Al2O3 contents are uniformly high ( > 10 wt%, except for one with 8 wt%). No other elements having comparable solar abundances are so strongly enriched, and alkali feldspar and merrillite are more common than in normal chondrules.
dc.title	THE ORIGIN OF CHROMITIC CHONDRULES AND THE VOLATILITY OF CR UNDER A RANGE OF NEBULAR CONDITIONS
dc.type	Статья

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