气候变化领域集成服务门户(CCPortal): Craters, boulders and regolith of (101955) bennu indicative of an old and dynamic surface

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DOI	10.1038/s41561-019-0326-6
	Craters, boulders and regolith of (101955) bennu indicative of an old and dynamic surface
	Walsh K.J.; Jawin E.R.; Ballouz R.-L.; Barnouin O.S.; Bierhaus E.B.; Connolly H.C.; Jr.; Molaro J.L.; McCoy T.J.; Delbo’ M.; Hartzell C.M.; Pajola M.; Schwartz S.R.; Trang D.; Asphaug E.; Becker K.J.; Beddingfield C.B.; Bennett C.A.; Bottke W.F.; Burke K.N.; Clark B.C.; Daly M.G.; Dellagiustina D.N.; Dworkin J.P.; Elder C.M.; Golish D.R.; Hildebrand A.R.; Malhotra R.; Marshall J.; Michel P.; Nolan M.C.; Perry M.E.; Rizk B.; Ryan A.; Sandford S.A.; Scheeres D.J.; Susorney H.C.M.; Thuillet F.; Lauretta D.S.; The OSIRIS-REx Team
发表日期	2019
ISSN	17520894
卷号	12
英文摘要	Small, kilometre-sized near-Earth asteroids are expected to have young and frequently refreshed surfaces for two reasons: collisional disruptions are frequent in the main asteroid belt where they originate, and thermal or tidal processes act on them once they become near-Earth asteroids. Here we present early measurements of numerous large candidate impact craters on near-Earth asteroid (101955) Bennu by the OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer) mission, which indicate a surface that is between 100 million and 1 billion years old, predating Bennu’s expected duration as a near-Earth asteroid. We also observe many fractured boulders, the morphology of which suggests an influence of impact or thermal processes over a considerable amount of time since the boulders were exposed at the surface. However, the surface also shows signs of more recent mass movement: clusters of boulders at topographic lows, a deficiency of small craters and infill of large craters. The oldest features likely record events from Bennu’s time in the main asteroid belt. © The Author(s), under exclusive licence to Springer Nature Limited 2019.
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/124693
作者单位	Southwest Research Institute, Boulder, CO, United States; Smithsonian Institution National Museum of Natural History, Washington, DC, United States; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, United States; The Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States; Lockheed Martin Space, Littleton, CO, United States; Department of Geology, Rowan University, Glassboro, NJ, United States; Planetary Science Institute, Tucson, AZ, United States; Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange, Nice, France; Department of Aerospace Engineering, University of Maryland, College ParkMD, United States; INAF–Osservatorio Astronomico di PadovaPadova, Italy; Hawaiʻi Institute of Geophysics and Planetology, University of Hawaiʻi at Mānoa, Honolulu, HI, United States; SETI Institute, Mountain View, CA, United States; Space Science Institute, Boulder, CO, United States; The Centre for Research in Earth and Space Science, York University,...
推荐引用方式 GB/T 7714	Walsh K.J.,Jawin E.R.,Ballouz R.-L.,et al. Craters, boulders and regolith of (101955) bennu indicative of an old and dynamic surface[J],2019,12.
APA	Walsh K.J..,Jawin E.R..,Ballouz R.-L..,Barnouin O.S..,Bierhaus E.B..,...&The OSIRIS-REx Team.(2019).Craters, boulders and regolith of (101955) bennu indicative of an old and dynamic surface.Nature Geoscience,12.
MLA	Walsh K.J.,et al."Craters, boulders and regolith of (101955) bennu indicative of an old and dynamic surface".Nature Geoscience 12(2019).