| タイトル | Highly Sideophile Element Abundance Constraints on the Nature of the Late Accretionary Histories of Earth, Moon and Mars |
| 本文（外部サイト） | http://hdl.handle.net/2060/20070009997 |
| 著者（英） | Puchtel, I. S.; James, O. B.; Walker, R. J.; Brandon, A. D.; Horan, M. F. |
| 著者所属（英） | NASA Johnson Space Center |
| 発行日 | 2007-01-01 |
| 言語 | eng |
| 内容記述 | The highly siderophile elements (HSE) include Re, Os, Ir, Ru, Pt and Pd. These elements are initially nearly-quantitatively stripped from planetary silicate mantles during core segregation. They then may be re-enriched in mantles via continued accretion sans continued core segregation. This suite of elements and its included long-lived radiogenic isotopes systems (Re-187 (right arrow) Os-187; Pt-190 (right arrow) Os-186) can potentially be used to fingerprint the characteristics of late accreted materials. The fingerprints may ultimately be useful to constrain the prior nebular history of the dominant late accreted materials, and to compare the proportion and genesis of late accretionary materials added to the inner planets. The past ten years have seen considerable accumulation of isotopic and compositional data for HSE present in the Earth's mantle, lunar mantle and impact melt breccias, and Martian meteorites. Here we review some of these data and consider the broader implications of the compiled data. |
| NASA分類 | Lunar and Planetary Science and Exploration |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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