| タイトル | Olivines and olivine coronas in mesosiderites |
| 著者（英） | Zucker, S. M.; Nehru, C. E.; Harlow, G. E.; Prinz, M. |
| 著者所属（英） | American Museum of Natural History |
| 発行日 | 1980-08-01 |
| 言語 | eng |
| 内容記述 | The paper presents a study of olivines and their surrounding coronas in mesosiderites texturally and compositionally using optical and microprobe methods. Olivine composition ranges from Fo(58-92) and shows no consistent pattern of distribution within and between mesosiderites; olivine occurs as large single crystals or as partially recrystallized mineral clasts, except for two lithic clasts. These are Emery and Vaca Muerta, and both are shock-modified olivine orthopyroxenites. Fine-grained coronas surround olivine, except for those in impact-melt group mesosiderites and those without tridymite in their matrices. Coronas consist largely of orthopyroxene, plagioclase, clinopyroxene, chromite, merillite, and ilmenite, and are similar to the matrix, but lack metal and tridymite. Texturally the innermost parts of the corona can be divided into three stages of development: (1) radiating acicular, (2) intermediate, and (3) granular. |
| NASA分類 | LUNAR AND PLANETARY EXPLORATION |
| レポートNO | 80A44671 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/420914 |
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