Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL074002 |
A colossal impact enriched Mars' mantle with noble metals | |
Brasser, R.1; Mojzsis, S. J.2,3 | |
2017-06-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan; USA; Hungary |
英文摘要 | Once the terrestrial planets had mostly completed their assembly, bombardment continued by planetesimals left over from accretion. Highly siderophile element (HSE) abundances in Mars' mantle imply that its late accretion supplement was 0.8wt %; Earth and the Moon obtained an additional 0.7wt % and 0.02wt %, respectively. The disproportionately high Earth/Moon accretion ratio is explicable by stochastic addition of a few remaining Ceres-sized bodies that preferentially targeted Earth. Here we show that Mars' late accretion budget also requires a colossal impact, a plausible visible remnant of which is the emispheric dichotomy. The addition of sufficient HSEs to the Martian mantle entails an impactor of at least 1200km in diameter to have struck Mars before similar to 4430Ma, by which time crust formation was well underway. Thus, the dichotomy could be one of the oldest geophysical features of the Martian crust. Ejected debris could be the source material for its satellites. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000405854200013 |
WOS关键词 | HIGHLY SIDEROPHILE ELEMENTS ; TUNGSTEN ISOTOPIC EVIDENCE ; EARLY DIFFERENTIATION ; LATE ACCRETION ; LATE VENEER ; TERRESTRIAL PLANETS ; CORE FORMATION ; ORIGIN ; EARTH ; MOON |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27012 |
专题 | 气候变化 |
作者单位 | 1.Tokyo Inst Technol, Earth Life Sci Inst, Tokyo, Japan; 2.Univ Colorado, Dept Geol Sci, Boulder, CO 80309 USA; 3.Hungarian Acad Sci, Inst Geol & Geochem Res, Res Ctr Astron & Earth Sci, Budapest, Hungary |
推荐引用方式 GB/T 7714 | Brasser, R.,Mojzsis, S. J.. A colossal impact enriched Mars' mantle with noble metals[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(12). |
APA | Brasser, R.,&Mojzsis, S. J..(2017).A colossal impact enriched Mars' mantle with noble metals.GEOPHYSICAL RESEARCH LETTERS,44(12). |
MLA | Brasser, R.,et al."A colossal impact enriched Mars' mantle with noble metals".GEOPHYSICAL RESEARCH LETTERS 44.12(2017). |
条目包含的文件 | 条目无相关文件。 |
个性服务 |
推荐该条目 |
保存到收藏夹 |
查看访问统计 |
导出为Endnote文件 |
谷歌学术 |
谷歌学术中相似的文章 |
[Brasser, R.]的文章 |
[Mojzsis, S. J.]的文章 |
百度学术 |
百度学术中相似的文章 |
[Brasser, R.]的文章 |
[Mojzsis, S. J.]的文章 |
必应学术 |
必应学术中相似的文章 |
[Brasser, R.]的文章 |
[Mojzsis, S. J.]的文章 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论