气候变化领域集成服务门户(CCPortal): Experimental evidence for lava-like mud flows under Martian surface conditions

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DOI	10.1038/s41561-020-0577-2
	Experimental evidence for lava-like mud flows under Martian surface conditions
	Brož P.; Krýza O.; Wilson L.; Conway S.J.; Hauber E.; Mazzini A.; Raack J.; Balme M.R.; Sylvest M.E.; Patel M.R.
发表日期	2020
ISSN	17520894
起始页码	403
结束页码	407
卷号	13 期号:6
英文摘要	Large outflow channels on ancient terrains of Mars have been interpreted as the products of catastrophic flood events. The rapid burial of water-rich sediments after such flooding could have led to sedimentary volcanism, in which mixtures of sediment and water (mud) erupt to the surface. Tens of thousands of volcano-like landforms populate the northern lowlands and other local sedimentary depocentres on Mars. However, it is difficult to determine whether the edifices are related to igneous or mud extrusions, partly because the behaviour of extruded mud under Martian surface conditions is poorly constrained. Here we investigate the mechanisms of mud propagation on Mars using experiments performed inside a low-pressure chamber at cold temperatures. We found that low viscosity mud under Martian conditions propagates differently from that on Earth, because of a rapid freezing and the formation of an icy crust. Instead, the experimental mud flows propagate like terrestrial pahoehoe lava flows, with liquid mud spilling from ruptures in the frozen crust, and then refreezing to form a new flow lobe. We suggest that mud volcanism can explain the formation of some lava-like flow morphologies on Mars, and that similar processes may apply to cryovolcanic extrusions on icy bodies in the Solar System. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
英文关键词	catastrophic event; flooding; ice cover; Mars; mud volcano; mudflow; sediment budget; volcanism
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/206756
作者单位	Institute of Geophysics of the Czech Academy of Sciences, Prague, Czech Republic; Lancaster Environment Centre, Lancaster University, Lancaster, United Kingdom; CNRS UMR-6112 Laboratoire de Planétologie et Géodynamique, Université de Nantes, Nantes, France; Institute of Planetary Research, German Aerospace Center (DLR), Berlin, Germany; Centre for Earth Evolution and Dynamics (CEED), University of Oslo, Oslo, Norway; Institut für Planetologie, Westfälische Wilhelms-Universität Münster, Münster, Germany; School of Physical Science, The Open University, Milton Keynes, United Kingdom; Space Science and Technology Department, STFC Rutherford Appleton Laboratory, Oxford, United Kingdom
推荐引用方式 GB/T 7714	Brož P.,Krýza O.,Wilson L.,et al. Experimental evidence for lava-like mud flows under Martian surface conditions[J],2020,13(6).
APA	Brož P..,Krýza O..,Wilson L..,Conway S.J..,Hauber E..,...&Patel M.R..(2020).Experimental evidence for lava-like mud flows under Martian surface conditions.Nature Geoscience,13(6).
MLA	Brož P.,et al."Experimental evidence for lava-like mud flows under Martian surface conditions".Nature Geoscience 13.6(2020).