| タイトル | Chondrules and Opaque Phases in Unequilibrated R Chondrites: A Comprehensive Assessment of Their Formation |
| 本文（外部サイト） | http://hdl.handle.net/2060/20160002410 |
| 著者（英） | Berger, E. L.; Connolly, H. C., Jr.; Lauretta, D. S.; Miller, K. E.; Domanik, K. |
| 著者所属（英） | NASA Johnson Space Center |
| 発行日 | 2016-03-21 |
| 言語 | eng |
| 内容記述 | Equilibrated Rumuruti (R) chondrites record an oxygen fugacity between 0 and 3.5 log units below the fayalite-magnetite-quartz buffer, and a sulfur fugacity (fS2) 2 log units above the iron-troilite buffer. They are more than an order of magnitude more oxidized than the ordinary chondrites [1], and orders of magnitude more sulfidized than solar values. Although the R chondrites have the highest (delta)O-17 value of any meteorites, analyses of unequilibrated R chondrites indicate chondrule formation in an oxygen isotope reservoir similar to that of the ordinary chondrite chondrules. We present the relationship of the R chondrite parent body to pre-accretionary volatiles O and S based on our analyses of unequilibrated R chondrite material in two thin sections from the meteorite Mount Prestrud (PRE) 95404. |
| NASA分類 | Geophysics |
| レポートNO | JSC-CN-35099 |
| 権利 | Copyright, Distribution under U.S. Government purpose rights |
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