气候变化领域集成服务门户(CCPortal): Dome formation on Ceres by solid-state flow analogous to terrestrial salt tectonics

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DOI	10.1038/s41561-019-0453-0
	Dome formation on Ceres by solid-state flow analogous to terrestrial salt tectonics
	Bland M.T.; Buczkowski D.L.; Sizemore H.G.; Ermakov A.I.; King S.D.; Sori M.M.; Raymond C.A.; Castillo-Rogez J.C.; Russell C.T.
发表日期	2019
ISSN	17520894
卷号	12 期号:10
英文摘要	The dwarf planet Ceres’s outer crust is a complex, heterogeneous mixture of ice, clathrates, salts and silicates. Numerous large domes on Ceres’s surface indicate a degree of geological activity. These domes have been attributed to cryovolcanism, but that is difficult to reconcile with Ceres’s small size and lack of long-lived heat sources. Here we alternatively propose that Ceres’s domes form by solid-state flow within the compositionally heterogeneous crust, a mechanism directly analogous to salt tectonics on Earth. We use numerical simulations to illustrate that differential loading of a crust with compositional heterogeneity on a scale of tens of kilometres can produce dome-like features of scale similar to those observed. The mechanism requires the presence of low-viscosity and low-density, possibly ice-rich, material in the upper 1–10 km of the subsurface. Such substantial regional heterogeneity in Ceres’s crustal composition is consistent with observations from the National Aeronautics and Space Administration’s Dawn mission. We conclude that deformation analogous to that in terrestrial salt tectonics is a viable alternative explanation for the observed surface morphologies, and is consistent with Ceres being both cold and geologically active. © 2019, This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply.
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/124597
作者单位	US Geological Survey, Astrogeology Science Center, Flagstaff, AZ, United States; Johns Hopkins Applied Physics Laboratory, Laurel, MD, United States; Planetary Science Institute, Tucson, AZ, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Virginia Tech, Blacksburg, VA, United States; University of Arizona, Tucson, AZ, United States; University of California, Los Angeles, Los Angeles, CA, United States
推荐引用方式 GB/T 7714	Bland M.T.,Buczkowski D.L.,Sizemore H.G.,et al. Dome formation on Ceres by solid-state flow analogous to terrestrial salt tectonics[J],2019,12(10).
APA	Bland M.T..,Buczkowski D.L..,Sizemore H.G..,Ermakov A.I..,King S.D..,...&Russell C.T..(2019).Dome formation on Ceres by solid-state flow analogous to terrestrial salt tectonics.Nature Geoscience,12(10).
MLA	Bland M.T.,et al."Dome formation on Ceres by solid-state flow analogous to terrestrial salt tectonics".Nature Geoscience 12.10(2019).