首页|Ion Probe Study of Silicate Inclusions from Colomera (IIE) Iron Meteorite:the Rare Earth Element Perspective
Ion Probe Study of Silicate Inclusions from Colomera (IIE) Iron Meteorite:the Rare Earth Element Perspective
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Coupled with a petrographical study, I carried out an ion probe study of rare earth element microdistributions in mineral phases of silicate inclusions from the Colomera IIE iron meteorite. Most mineral grains have homogeneous REEs, but show considerable inter-grain variations by a factor of 2 to 100. The whole rock REE abundances for Colomera,estimated by combining REE data with modal abundances, are relatively LREE-enriched with REEs of ～10'CI, which suggest that Colomera silicates were highly differentiated and might represent a low degree partial melt (～10%) of a chondritic source. REE geochemistry of Colomera silicate inclusions points to an origin that involves differentiation,dynamic mixing, remelting, reduction, recrystallization, and subsequent rapid cooling near the surface of a planetary body.
ion proberare earth elementsColomerasilicate inclusionsIIE iron meteorites
HSU Weibiao
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Laboratory for Astrochemistry and Planetary Sciences, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China
Division of Geological & Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA
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