| Ion Probe Study of Silicate Inclusions from Colomera （IIE） Iron Meteorite： the Rare Earth Element Perspective |
| |
| 作者姓名： | HSUWeibiao |
| |
| 作者单位： | LaboratoryforAstrochemistryandPlanetarySciences,PurpleMountamOOservatory,ChineseAcademyofSciences,Nanjing210008,China |
| |
| 摘 要： | 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.
|
| 关 键 词： | 离子探测器 稀有元素 硅酸盐 铁陨星 |
Ion Probe Study of Silicate Inclusions from Colomera (IIE) Iron Meteorite: the Rare Earth Element Perspective |
| |
| Authors: | HSU Weibiao |
| |
| Abstract: | Abstract 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. |
| |
| Keywords: | ion probe rare earth elements Colomera silicate inclusions IIE iron meteorites |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《Acta Geologica Sinica》浏览原始摘要信息 |
| 点击此处可从《Acta Geologica Sinica》下载免费的PDF全文 |
|
