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DOI | 10.1038/s41561-019-0323-9 |
Surface refreshing of Martian moon Phobos by orbital eccentricity-driven grain motion | |
Ballouz, Ronald-Louis1,2,3; Baresi, Nicola1; Crites, Sarah T.1; Kawakatsu, Yasuhiro1; Fujimoto, Masaki1 | |
2019-04-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2019 |
卷号 | 12期号:4页码:229-+ |
文章类型 | Article |
语种 | 英语 |
国家 | Japan; USA |
英文摘要 | The surface of the Martian moon Phobos exhibits two distinct geologic units, red and blue, characterized by their spectral slopes. The provenance of these units is uncertain yet crucial to understanding the origin of the Martian moon and its interaction with the space environment. Here we present a combination of dynamical analyses and numerical simulations of particle dynamics to show that periodic variations in dynamic slopes, driven by orbital eccentricity, can cause surface grain motion. For regions with steep slopes that vary substantially over one Phobos orbit, the surface is excavated at a faster rate than the space weathering timescale. Our model predicts that this new mechanism is most effective in regions that coincide with blue units. Therefore, space weathering is the likely driver of the dichotomy on the moon's surface, reddening blue units that represent pristine endogenic material. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000462621700005 |
WOS关键词 | ORIGIN ; STABILITY ; SHAPE |
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/182191 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Japanese Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa, Japan; 2.Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA; 3.Univ Maryland, Dept Astron, College Pk, MD 20742 USA |
推荐引用方式 GB/T 7714 | Ballouz, Ronald-Louis,Baresi, Nicola,Crites, Sarah T.,et al. Surface refreshing of Martian moon Phobos by orbital eccentricity-driven grain motion[J]. NATURE GEOSCIENCE,2019,12(4):229-+. |
APA | Ballouz, Ronald-Louis,Baresi, Nicola,Crites, Sarah T.,Kawakatsu, Yasuhiro,&Fujimoto, Masaki.(2019).Surface refreshing of Martian moon Phobos by orbital eccentricity-driven grain motion.NATURE GEOSCIENCE,12(4),229-+. |
MLA | Ballouz, Ronald-Louis,et al."Surface refreshing of Martian moon Phobos by orbital eccentricity-driven grain motion".NATURE GEOSCIENCE 12.4(2019):229-+. |
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