气候变化领域集成服务门户(CCPortal): A globally fragmented and mobile lithosphere on Venus

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DOI	10.1073/pnas.2025919118
	A globally fragmented and mobile lithosphere on Venus
	Byrne P.K.; Ghail R.C.; Şengör A.M.C.; James P.B.; Klimczak C.; Solomon S.C.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:26
英文摘要	Venus has been thought to possess a globally continuous lithosphere, in contrast to the mosaic of mobile tectonic plates that characterizes Earth. However, the Venus surface has been extensively deformed, and convection of the underlying mantle, possibly acting in concert with a low-strength lower crust, has been suggested as a source of some surface horizontal strains. The extent of surface mobility on Venus driven by mantle convection, however, and the style and scale of its tectonic expression have been unclear. We report a globally distributed set of crustal blocks in the Venus lowlands that show evidence for having rotated and/ or moved laterally relative to one another, akin to jostling pack ice. At least some of this deformation on Venus postdates the emplacement of the locally youngest plains materials. Lithospheric stresses calculated from interior viscous flow models consistent with longwavelength gravity and topography are sufficient to drive brittle failure in the upper Venus crust in all areas where these blocks are present, confirming that interior convective motion can provide a mechanism for driving deformation at the surface. The limited but widespread lithospheric mobility of Venus, in marked contrast to the tectonic styles indicative of a static lithosphere on Mercury, the Moon, and Mars,may offer parallels to interior-surface coupling on the early Earth, when global heat flux was substantially higher, and the lithosphere generally thinner, than today. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Block tectonics; Earth; Interior-surface coupling; Mantle convection; Venus
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238704
作者单位	Planetary Research Group, Department of Marine Earth and Atmospheric Sciences, North Carolina State University, Raleigh, NC 27695, United States; Department of Earth Sciences, Royal Holloway, University of London, Surrey, TW20 0EX, United Kingdom; Eurasia Institute of Earth Sciences, Istanbul Technical University, Ayazaga, Istanbul, 34469, Turkey; Department of Geology, Faculty ofMines, Istanbul Technical University, Ayazaga, Istanbul, 34469, Turkey; Department of Geosciences, Baylor University, Waco, TX 76798, United States; Department of Geology, University of Georgia, Athens, GA 30602, United States; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, United States
推荐引用方式 GB/T 7714	Byrne P.K.,Ghail R.C.,Şengör A.M.C.,et al. A globally fragmented and mobile lithosphere on Venus[J],2021,118(26).
APA	Byrne P.K.,Ghail R.C.,Şengör A.M.C.,James P.B.,Klimczak C.,&Solomon S.C..(2021).A globally fragmented and mobile lithosphere on Venus.Proceedings of the National Academy of Sciences of the United States of America,118(26).
MLA	Byrne P.K.,et al."A globally fragmented and mobile lithosphere on Venus".Proceedings of the National Academy of Sciences of the United States of America 118.26(2021).