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DOI | 10.1038/NGEO2928 |
Experimental and observational evidence for plume-induced subduction on Venus | |
Davaille, A.1; Smrekar, S. E.2; Tomlinson, S.3 | |
2017-05-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2017 |
卷号 | 10期号:5 |
文章类型 | Article |
语种 | 英语 |
国家 | France; USA |
英文摘要 | Why Venus lacks plate tectonics remains an unanswered question in terrestrial planet evolution. There is observational evidence for subduction-a requirement for plate tectonics-on Venus, but it is unclear why the features have characteristics of both mantle plumes and subduction zones. One explanation is that mantle plumes trigger subduction. Here we compare laboratory experiments of plume-induced subduction in a colloidal solution of nanoparticles to observations of proposed subduction sites on Venus. The experimental fluids are heated from below to produce upwelling plumes, which in turn produce tensile fractures in the lithosphere-like skin that forms on the upper surface. Plume material upwells through the fractures and spreads above the skin, analogous to volcanic flooding, and leads to bending and eventual subduction of the skin along arcuate segments. The segments are analogous to the semi-circular trenches seen at two proposed sites of plume-triggered subduction at Quetzalpetlatl and Artemis coronae. Other experimental deformation structures and subsurface density variations are also consistent with topography, radar and gravity data for Venus. Scaling analysis suggests that this regime with limited, plume-induced subduction is favoured by a hot lithosphere, such as that found on early Earth or present-day Venus. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000400407000011 |
WOS关键词 | TEMPERATURE-DEPENDENT VISCOSITY ; PLATE-TECTONICS ; LABORATORY EXPERIMENTS ; MANTLE CONVECTION ; CORONA FORMATION ; ARTEMIS-CHASMA ; LITHOSPHERE ; INITIATION ; MODEL ; BOUNDARY |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/34693 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Univ Paris 11, Univ Paris Saclay, CNRS, Lab FAST, F-91405 Orsay, France; 2.CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA; 3.Univ Calif Los Angeles, Earth Planetary & Space Sci, Los Angeles, CA 90095 USA |
推荐引用方式 GB/T 7714 | Davaille, A.,Smrekar, S. E.,Tomlinson, S.. Experimental and observational evidence for plume-induced subduction on Venus[J]. NATURE GEOSCIENCE,2017,10(5). |
APA | Davaille, A.,Smrekar, S. E.,&Tomlinson, S..(2017).Experimental and observational evidence for plume-induced subduction on Venus.NATURE GEOSCIENCE,10(5). |
MLA | Davaille, A.,et al."Experimental and observational evidence for plume-induced subduction on Venus".NATURE GEOSCIENCE 10.5(2017). |
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