气候变化领域集成服务门户(CCPortal): Pluto's Antipodal Terrains Imply a Thick Subsurface Ocean and Hydrated Core

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DOI	10.1029/2020GL091596
	Pluto's Antipodal Terrains Imply a Thick Subsurface Ocean and Hydrated Core
	Denton C.A.; Johnson B.C.; Wakita S.; Freed A.M.; Melosh H.J.; Stern S.A.
发表日期	2021
ISSN	0094-8276
卷号	48 期号:2
英文摘要	Recent analysis of New Horizons data revealed an ∼1,000-km-diameter region of large-scale lineations antipodal to Sputnik Planitia, the 1,200 × 2,000 km elliptical impact basin on Pluto's anti-Charon hemisphere. At the available resolution, these lineations are similar to antipodal terrains associated with large impact basins elsewhere in the Solar System. Here, we simulate the Sputnik Planitia-forming impact and track stress waves through a Pluto-like target body to the antipode. We find that the Sputnik Planitia-forming impact is capable of producing significant antipodal terrains and the observed lineations may be extensional graben. The extent and mode of deformation at the antipode, however, is sensitive to ocean thickness and core composition. Simulations that best reproduce the observed terrains imply that Pluto may have hosted a >150-km-thick ocean and a hydrated core at the time of impact. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Earth sciences; Geophysics; Core composition; Impact basins; Mode of deformation; Stress wave; Sub-surface ocean; Hydration
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169171
作者单位	Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West LafayetteIN, United States; Department of Physics and Astronomy, Purdue University, West LafayetteIN, United States; Southwest Research Institute, Boulder, CO, United States
推荐引用方式 GB/T 7714	Denton C.A.,Johnson B.C.,Wakita S.,et al. Pluto's Antipodal Terrains Imply a Thick Subsurface Ocean and Hydrated Core[J],2021,48(2).
APA	Denton C.A.,Johnson B.C.,Wakita S.,Freed A.M.,Melosh H.J.,&Stern S.A..(2021).Pluto's Antipodal Terrains Imply a Thick Subsurface Ocean and Hydrated Core.Geophysical Research Letters,48(2).
MLA	Denton C.A.,et al."Pluto's Antipodal Terrains Imply a Thick Subsurface Ocean and Hydrated Core".Geophysical Research Letters 48.2(2021).