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| DOI | 10.1016/j.epsl.2020.116389 |
| The formation of Enceladus' Tiger Stripe Fractures from eccentricity tides | |
| Rhoden A.R.; Hurford T.A.; Spitale J.; Henning W.; Huff E.M.; Bland M.T.; Sajous S. | |
| 发表日期 | 2020 |
| ISSN | 0012821X |
| 卷号 | 544 |
| 英文摘要 | Enceladus has a young, tectonically active south polar region, which is erupting material from a prominent set of fractures called Tiger Stripes. No comparable activity is observed at the north pole, which is heavily cratered with limited tectonism. Given the many lines of evidence supporting a global ocean under Enceladus' icy shell, the reason for the dichotomy in geologic activity is unclear. We model the formation of the Tiger Stripes as tidally-driven fractures and examine the magnitudes of tidal stresses with different ice shell structures in order to explore whether and how tidal stress might explain Enceladus' distribution of tectonic activity. We find that eccentricity-driven tidal stresses would produce fractures of nearly identical orientations to the observed Tiger Stripe Fractures and that a 10-km difference in ice shell thickness between the north and south poles can result in substantially different tidal stress magnitudes, providing a natural explanation for the hemispheric dichotomy in tectonic activity on Enceladus. Finally, we synthesize these results with Enceladus' global geologic record to offer insight into the evolution of this enigmatic moon. © 2020 |
| 关键词 | Enceladusocean worldssatellite tidestectonics |
| 英文关键词 | Poles; Tectonics; Global ocean; Ice shells; Icy shell; North Pole; South polar region; South pole; Tectonic activity; Tidal stress; Fracture; eccentricity; fracture; planetary satellite; Saturn; tectonic structure; tide |
| 语种 | 英语 |
| 来源期刊 | Earth and Planetary Science Letters
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/202854 |
| 作者单位 | Southwest Research Institute, Boulder, CO, United States; NASA Goddard Space Flight Center, Code 698, Greenbelt, MD, United States; Planetary Science Institute, Tucson, AZ, United States; Department of Astronomy, University of Maryland – College Park, College Park, MD, United States; NASA Jet Propulsion Laboratory, Pasadena, CA, United States; Astrogeology Science Center, U. S. Geological Survey, Flagstaff, AZ, United States; Sajous Consulting, LLC, Denver, CO, United States |
| 推荐引用方式 GB/T 7714 | Rhoden A.R.,Hurford T.A.,Spitale J.,et al. The formation of Enceladus' Tiger Stripe Fractures from eccentricity tides[J],2020,544. |
| APA | Rhoden A.R..,Hurford T.A..,Spitale J..,Henning W..,Huff E.M..,...&Sajous S..(2020).The formation of Enceladus' Tiger Stripe Fractures from eccentricity tides.Earth and Planetary Science Letters,544. |
| MLA | Rhoden A.R.,et al."The formation of Enceladus' Tiger Stripe Fractures from eccentricity tides".Earth and Planetary Science Letters 544(2020). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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