干旱区生态环境知识资源中心(Arid): Small-scale lobate hillslope features on Mars: A comparative 3D morphological study with terrestrial solifluction lobes and zebra stripe lobes

Arid

DOI	10.1016/j.icarus.2019.113606
	Small-scale lobate hillslope features on Mars: A comparative 3D morphological study with terrestrial solifluction lobes and zebra stripe lobes
	Gastineau, Renaldo; Conway, Susan J.; Johnsson, Andreas; Eichel, Jana; Mangold, Nicolas; Grindrod, Peter M.; Izquierdo, Tatiana
通讯作者	Gastineau, R (corresponding author), Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, IRD,IFSTTAR,ISTerre, F-38000 Grenoble, France.
会议名称	Late Mars Workshop
会议日期	OCT 01-02, 2018
会议地点	Lunar& Planetary Inst, Houston, TX
英文摘要	Small-scale lobes (SSL) observed at the surface of Mars are thought to be the result of solifluction. Hence, their existence has important implications for our understanding of recent climate history, the distribution of thaw liquids and its geomorphic effects, as water is believed not to have been recently stable at the martian surface. These small-scale lobes are limited to sloping terrains and often occur alongside polygonal patterned ground attesting to the presence of ice in the environment. In this study, we perform a comparative 3D morphometric analysis of the lobes on Mars with terrestrial analogues. We use data from High Resolution Imaging Science Experiment (HiRISE) camera in order to create Digital Terrain Models (DTMs) on Mars at 1 m/pix. For the terrestrial analogues, we use DTMs and orthophotos from five periglacial environments with solifluction lobes and from one site with lobate features found in the Atacama Desert. The lobate features in the Atacama Desert are found within features called zebra stripes, which are apparently unique to the Atacama and are now generally accepted to be the result of seismic shaking. We show that SSL on Mars overlap morphometrically with terrestrial solifluction lobes, and are less similar to zebra stripe lobes. The majority of martian SSL occur below the angle of repose which demonstrates that a dry fall mechanism cannot be responsible for their formation and that lubrication of the subsurface is required. We found that martian SSL only occur on slopes greater than similar to 10 degrees, a constraint not observed for terrestrial solifluction lobes nor zebra stripe lobes in Atacama. We hypothesise that this apparent constraint does not result from the lowered gravity on Mars, but instead from differing soil properties and/or thermal regime between Mars and Earth which affects the slope at which creep can initiate. We cannot rule out a role of CO2 sublimation in lobe-formation based on our terrestrial measurements.
英文关键词	Mars Surface activity Peri glacial processes Terrestrial analogues 3D analysis
来源出版物	ICARUS
ISSN	0019-1035
EISSN	1090-2643
出版年	2020
卷号	342
出版者	ACADEMIC PRESS INC ELSEVIER SCIENCE
类型	Article; Proceedings Paper
语种	英语
开放获取类型	Green Submitted
收录类别	CPCI-S
WOS记录号	WOS:000525873500009
WOS关键词	GROUND-ICE ; LABORATORY SIMULATION ; PERIGLACIAL LANDFORMS ; LANDSCAPE EVOLUTION ; NEAR-SURFACE ; SOIL ; FROST ; WATER ; GULLIES ; VEGETATION
WOS类目	Astronomy & Astrophysics
WOS研究方向	Astronomy & Astrophysics
资源类型	会议论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/337007
作者单位	[Gastineau, Renaldo; Conway, Susan J.; Mangold, Nicolas] Univ Nantes, CNRS, UMR 6112, Lab Planetol & Geodynam, Nantes, France; [Gastineau, Renaldo] Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, IRD,IFSTTAR,ISTerre, F-38000 Grenoble, France; [Johnsson, Andreas] Univ Gothenburg, Dept Earth Sci, Gothenburg, Sweden; [Eichel, Jana] KIT, Inst Geog & Geoecol, Kaiserstr 12, D-76131 Karlsruhe, Germany; [Grindrod, Peter M.] Nat Hist Museum, Dept Earth Sci, London, England; [Izquierdo, Tatiana] Univ Atacama IDICTEC UDA, Inst Invest Cient & Tecnol, Ave Copayapu 485, Copiapo, Chile
推荐引用方式 GB/T 7714	Gastineau, Renaldo,Conway, Susan J.,Johnsson, Andreas,et al. Small-scale lobate hillslope features on Mars: A comparative 3D morphological study with terrestrial solifluction lobes and zebra stripe lobes[C]:ACADEMIC PRESS INC ELSEVIER SCIENCE,2020.