气候变化领域集成服务门户(CCPortal): Post-impact cryo-hydrologic formation of small mounds and hills in Ceres’s Occator crater

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DOI	10.1038/s41561-020-0581-6
	Post-impact cryo-hydrologic formation of small mounds and hills in Ceres’s Occator crater
	Schmidt B.E.; Sizemore H.G.; Hughson K.H.G.; Duarte K.D.; Romero V.N.; Scully J.E.C.; Schenk P.M.; Buczkowski D.L.; Williams D.A.; Nathues A.; Udell K.; Castillo-Rogez J.C.; Raymond C.A.; Russell C.T.
发表日期	2020
ISSN	17520894
起始页码	605
结束页码	610
卷号	13 期号:9
英文摘要	The intimate mixture of ice and silicate within the uppermost few kilometres of Ceres influences its geology and the evolution of its subsurface. Both ground ice and cryovolcanic processes have been hypothesized to form geologic terrains on Ceres, including within Occator crater, where they have been suggested to influence the post-impact surface evolution. Both types of processes involve the presence and expression of volatiles and brines, such that distinguishing between them could be difficult. Here, we use images and topography data from the NASA Dawn mission to investigate the morphology, age and distribution of mounds and hills within Occator crater, and infer their origin. The shapes and relative ages of many of these features suggest that they formed as impact-induced water-rich flows that covered the crater floor refroze in a manner similar to the formation of periglacial ice-cored mounds on Earth called pingos. We suggest that impacts on Ceres produced hydrologic conditions for surface changes in the absence of cryovolcanic processes. Our findings imply that cryo-hydrologic processes extend beyond Earth and Mars, and have been active on Ceres in the geologically recent past. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
英文关键词	brine; crater; Mars; palsa; planetary landform; silicate; terrain; topographic mapping; volatile element; Ceres
语种	英语
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206827
作者单位	Georgia Institute of Technology, Atlanta, GA, United States; Planetary Science Institute, Tucson, AZ, United States; University of California, Los Angeles, Los Angeles, CA, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Lunar and Planetary Institute, Houston, TX, United States; Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States; School of Earth and Space Exploration, Arizona State University, Tempe, AZ, United States; Max Planck Institute for Solar System Research, Gottingen, Germany
推荐引用方式 GB/T 7714	Schmidt B.E.,Sizemore H.G.,Hughson K.H.G.,等. Post-impact cryo-hydrologic formation of small mounds and hills in Ceres’s Occator crater[J],2020,13(9).
APA	Schmidt B.E..,Sizemore H.G..,Hughson K.H.G..,Duarte K.D..,Romero V.N..,...&Russell C.T..(2020).Post-impact cryo-hydrologic formation of small mounds and hills in Ceres’s Occator crater.Nature Geoscience,13(9).
MLA	Schmidt B.E.,et al."Post-impact cryo-hydrologic formation of small mounds and hills in Ceres’s Occator crater".Nature Geoscience 13.9(2020).