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Jahrbuch-CD der MPG 2003 - Efremovka 101.1: A CAI with ult (523 words) |
 | Efremovka 101.1: A CAI with ultrarefractory REE patterns and enormous enrichments of Se, Zr, and Y in Fassaite and Perovskite |
| Fassaite reaction rims around FeNi metals are also encountered. |
| Perovskites are enriched in Y and depleted in Sc and Zr in comparison to fassaites. |
| 215 (612 words) |
| The small fine-grained area consists of orthopyroxene (Fs 13.4), whereas fassaite is the main mineral within the coarse-grained area. |
| The REE pattern obtained for the fassaite in micrometeorite BI54B3-31 is an unfractionated, relatively smooth pattern (25-40 x CI) with substantial Eu and Gd depletions (< 4 and <7 x CI, respectively). |
| Fassaite and orthopyroxene show oxygen isotopic compositions that plot close to the terrestrial fractionation line. |
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