气候变化领域集成服务门户(CCPortal): Crater Morphometry on the Mafic Floor Unit at Jezero Crater; Mars: Comparisons to a Known Basaltic Lava Plain at the InSight Landing Site

CCPortal

DOI	10.1029/2020GL089607
	Crater Morphometry on the Mafic Floor Unit at Jezero Crater; Mars: Comparisons to a Known Basaltic Lava Plain at the InSight Landing Site
	Warner N.H.; Schuyler A.J.; Rogers A.D.; Golombek M.P.; Grant J.; Wilson S.; Weitz C.; Williams N.; Calef F.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:17
英文摘要	A secondary objective for the Perseverance rover mission to Jezero crater, Mars, is to collect igneous rocks for analysis on Earth. The mafic crater floor unit (MFU) represents the best candidate. Ten-meter-scale craters on the MFU exhibit rocky ejecta, rims, and slopes that indicate resistant rock. The frequency distribution of these craters is, however, low. Comparisons of MFU craters to craters on a lava plain at the Interior Exploration using Seismic Investigation, Geodesy and Heat Transport mission (InSight) landing site reveal that the MFU lacks a granular regolith. Removal of regolith or exhumation of the MFU explains the rocky crater morphology and low density. Erosion rates, calculated using crater retention timescales of ~2.0 Ga for both locations, are 10−3 to 10−4 m/Myr. The rates derive from craters impacted into rocky materials on the MFU versus regolith at InSight. The difference in material strength, yet comparable erosion rates, requires more vigorous surface processes at Jezero relative to global averages on Mars. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Erosion; Igneous rocks; Morphology; Basaltic lava; Crater morphology; Frequency distributions; Heat transport; Material strength; Rover missions; Seismic investigations; Surface process; Floors; comparative study; crater; igneous rock; lava; Mars; regolith
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169852
作者单位	Department of Geological Sciences, SUNY Geneseo, Geneseo, NY, United States; Department of Geosciences, Stony Brook University, Stony Brook, NY, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Center for Earth and Planetary Studies, Smithsonian National Air and Space Museum, Washington, DC, United States; Planetary Science Institute, Tucson, AZ, United States
推荐引用方式 GB/T 7714	Warner N.H.,Schuyler A.J.,Rogers A.D.,et al. Crater Morphometry on the Mafic Floor Unit at Jezero Crater; Mars: Comparisons to a Known Basaltic Lava Plain at the InSight Landing Site[J],2020,47(17).
APA	Warner N.H..,Schuyler A.J..,Rogers A.D..,Golombek M.P..,Grant J..,...&Calef F..(2020).Crater Morphometry on the Mafic Floor Unit at Jezero Crater; Mars: Comparisons to a Known Basaltic Lava Plain at the InSight Landing Site.Geophysical Research Letters,47(17).
MLA	Warner N.H.,et al."Crater Morphometry on the Mafic Floor Unit at Jezero Crater; Mars: Comparisons to a Known Basaltic Lava Plain at the InSight Landing Site".Geophysical Research Letters 47.17(2020).